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Cheap flights from Baltimore to St. Louis (BWI - STL) from $73

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
BWI — STL
Jun 11 — Jun 181
From?
To?
Tue 6/11
Tue 6/18
1 adult, Economy
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The best prices from Baltimore/Washington to Lambert-St Louis are usually found in March or October, booked 34 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Baltimore to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Baltimore (BWI) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 6, 2024.

Popular in

December

Cheapest in

March

Round-trip from

$318

One-way from

$120
High demand for flights, 22% potential price rise
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Best time to find cheap flights, 34% potential price drop
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From Baltimore/Washington to Lambert-St Louis
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One-way flight from Baltimore/Washington to Lambert-St Louis
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What is the cheapest day to fly round-trip from Baltimore to St. Louis?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 45% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Baltimore to St. Louis?

To save on the cost of your flight from Baltimore to St. Louis, book at least 45 days before your planned departure. Booking around this time can save you about 147% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $408 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $470.

What is the cheapest month to fly from Baltimore to St. Louis?

January is one of the best times of the year to fly to St. Louis from Baltimore. Prices for January average $329 per person but you can even find prices for as low as $130. The most expensive prices can be found in the month of May. Opting for a January flight can save you 17% on your journey compared to booking in May

What is the cheapest time of day to fly from BWI to STL?

One of the essential ways to save on airfare from Baltimore to St. Louis is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 55% on airfare.

Cheap Baltimore to St. Louis flights in June & July 2024

Find cheap flight options from Baltimore to St. Louis specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Prices were last updated on June 6, 2024.
The lowest fares we've come across on flights traveling from Baltimore to St. Louis in June and July 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Tue 6/255:45 amBWI - STL
1 stop6h 12mSpirit Airlines
Thu 6/276:22 pmSTL - BWI
1 stop13h 13mSpirit Airlines
Deal found 6/5$124
Wed 7/1710:40 pmBWI - STL
1 stop19h 49mSpirit Airlines
Tue 7/2310:11 amSTL - BWI
1 stop6h 15mSpirit Airlines
Deal found 6/5$141
Fri 7/1210:40 pmBWI - STL
1 stop19h 49mSpirit Airlines
Tue 7/1610:11 amSTL - BWI
1 stop6h 15mSpirit Airlines
Deal found 6/4$163
Mon 6/245:31 pmBWI - STL
1 stop18h 26mSpirit Airlines
Tue 6/2511:57 amSTL - BWI
1 stop7h 04mSpirit Airlines
Deal found 6/6$167
Mon 6/1710:45 pmBWI - STL
2 stops13h 12mSpirit Airlines
Tue 6/183:23 pmSTL - BWI
1 stop8h 22mSpirit Airlines
Deal found 6/6$169
Mon 7/17:09 pmBWI - STL
2 stops17h 05mFrontier
Mon 7/87:51 pmSTL - BWI
1 stop23h 00mFrontier
Deal found 6/6$171
Tue 6/255:45 amBWI - STL
1 stop6h 12mSpirit Airlines
Thu 6/276:22 pmSTL - BWI
2 stops21h 09mSpirit Airlines
Deal found 6/5$174
Mon 7/2910:40 pmBWI - STL
1 stop11h 46mMultiple Airlines
Wed 7/317:33 pmSTL - BWI
1 stop18h 24mMultiple Airlines
Deal found 6/6$175
Wed 6/2610:45 pmBWI - STL
1 stop19h 43mSpirit Airlines
Sun 6/305:22 pmSTL - BWI
1 stop14h 13mSpirit Airlines
Deal found 6/5$178

Baltimore to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Baltimore and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
The lowest fares we've come across on flights traveling from Baltimore to St. Louis in June and July 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Sat 9/76:30 amBWI - STL
1 stop10h 50mSpirit Airlines
Tue 9/105:20 pmSTL - BWI
1 stop6h 52mSpirit Airlines
Deal found 6/5$100
Wed 9/46:55 pmBWI - STL
1 stop13h 12mSpirit Airlines
Tue 9/105:20 pmSTL - BWI
1 stop6h 52mSpirit Airlines
Deal found 6/5$101
Wed 9/42:40 pmBWI - STL
2 stops17h 27mSpirit Airlines
Tue 9/105:20 pmSTL - BWI
1 stop6h 52mSpirit Airlines
Deal found 6/5$116
Tue 6/255:45 amBWI - STL
1 stop6h 12mSpirit Airlines
Thu 6/276:22 pmSTL - BWI
1 stop13h 13mSpirit Airlines
Deal found 6/5$124
Wed 9/48:55 amBWI - STL
2 stops23h 12mSpirit Airlines
Tue 9/102:35 pmSTL - BWI
2 stops17h 07mSpirit Airlines
Deal found 6/5$137
Wed 7/1710:40 pmBWI - STL
1 stop19h 49mSpirit Airlines
Tue 7/2310:11 amSTL - BWI
1 stop6h 15mSpirit Airlines
Deal found 6/5$141
Sat 9/219:00 amBWI - STL
1 stop8h 20mSpirit Airlines
Thu 9/267:57 amSTL - BWI
1 stop11h 28mSpirit Airlines
Deal found 6/6$146
Mon 9/166:55 pmBWI - STL
1 stop13h 12mMultiple Airlines
Fri 9/206:42 pmSTL - BWI
1 stop13h 10mMultiple Airlines
Deal found 6/5$149
Fri 9/61:03 pmBWI - STL
1 stop21h 34mFrontier
Tue 9/1010:32 pmSTL - BWI
1 stop12h 31mFrontier
Deal found 6/4$151

Baltimore to St. Louis flights leaving soon

Find last-minute flight options from Baltimore to St. Louis for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
Consider one of these great deals we found on last-minute flights from Baltimore to St. Louis. Users should examine the flight details to ensure there are no surprises.
Sat 6/157:37 pmBWI - STL
1 stop23h 28mSpirit Airlines
Tue 6/1811:57 amSTL - BWI
2 stops10h 54mSpirit Airlines
Deal found 6/5$203
Sat 6/1511:21 pmBWI - STL
2 stops19h 44mSpirit Airlines
Tue 6/1811:57 amSTL - BWI
2 stops10h 54mSpirit Airlines
Deal found 6/5$235
Sat 6/157:37 pmBWI - STL
1 stop23h 28mSpirit Airlines
Tue 6/1811:57 amSTL - BWI
1 stop7h 04mSpirit Airlines
Deal found 6/5$238
Sat 6/1510:44 pmBWI - STL
3 stops38h 01mMultiple Airlines
Tue 6/1811:57 amSTL - BWI
2 stops10h 54mMultiple Airlines
Deal found 6/5$254
Wed 6/128:18 amBWI - STL
2 stops34h 10mSpirit Airlines
Thu 6/138:12 pmSTL - BWI
1 stop27h 38mSpirit Airlines
Deal found 6/5$289
Wed 6/1210:45 pmBWI - STL
1 stop19h 43mSpirit Airlines
Thu 6/138:12 pmSTL - BWI
1 stop27h 38mSpirit Airlines
Deal found 6/5$295
Sat 6/1510:44 pmBWI - STL
3 stops46h 11mMultiple Airlines
Tue 6/1811:57 amSTL - BWI
3 stops34h 54mMultiple Airlines
Deal found 6/5$308
Sat 6/157:37 pmBWI - STL
1 stop23h 28mSpirit Airlines
Sat 6/226:22 pmSTL - BWI
1 stop6h 06mSpirit Airlines
Deal found 6/5$309
Sat 6/1511:21 pmBWI - STL
2 stops19h 44mMultiple Airlines
Mon 6/242:00 pmSTL - BWI
2 stops32h 51mMultiple Airlines
Deal found 6/5$311

One-way flights to St. Louis from Baltimore

Search for one-way flight options from Baltimore to St. Louis. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
Users traveling one-way from Baltimore to St. Louis can select one of these great deals. Those needing a return flight from Baltimore to St. Louis can use the search form above.
Sat 9/219:00 amBWI - STL
1 stop8h 20mSpirit Airlines
Deal found 6/6$73
Tue 8/208:55 amBWI - STL
2 stops23h 25mSpirit Airlines
Deal found 6/6$77
Wed 6/2610:45 pmBWI - STL
1 stop19h 43mSpirit Airlines
Deal found 6/5$83
Thu 8/228:00 amBWI - STL
1 stop24h 02mFrontier
Deal found 6/5$84
Mon 7/110:45 pmBWI - STL
1 stop16h 38mSpirit Airlines
Deal found 6/5$89
Tue 6/185:45 amBWI - STL
1 stop6h 12mSpirit Airlines
Deal found 6/5$93
Wed 6/268:18 amBWI - STL
2 stops34h 10mSpirit Airlines
Deal found 6/5$94
Fri 9/271:03 pmBWI - STL
1 stop21h 34mFrontier
Deal found 6/6$100
Thu 9/1211:30 amBWI - STL
1 stop7h 00mSpirit Airlines
Deal found 6/4$102

Find flights from Baltimore to St. Louis within your budget

Customize your flight search to find flights from Baltimore to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$100 - $325

Route

Depart

Return

Price

Baltimore/WashingtonLambert-St Louis

BWI - STL

BWISTL

Baltimore/Washington

Sat 9/7

1 stop10h 50m

Lambert-St Louis

Tue 9/10

1 stop6h 52m

$100

Baltimore/WashingtonLambert-St Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 9/4

1 stop13h 12m

Lambert-St Louis

Tue 9/10

1 stop6h 52m

$101

Baltimore/WashingtonLambert-St Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 9/4

2 stops17h 27m

Lambert-St Louis

Tue 9/10

1 stop6h 52m

$116

Baltimore/WashingtonLambert-St Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 6/25

1 stop6h 12m

Lambert-St Louis

Thu 6/27

1 stop13h 13m

$124

Baltimore/WashingtonLambert-St Louis

BWI - STL

BWISTL

Baltimore/Washington

Mon 9/16

1 stop13h 12m

Lambert-St Louis

Fri 9/20

1 stop13h 10m

$149

Baltimore/WashingtonLambert-St Louis

BWI - STL

BWISTL

Baltimore/Washington

Fri 9/6

1 stop21h 34m

Lambert-St Louis

Tue 9/10

1 stop12h 31m

$151

Baltimore/WashingtonLambert-St Louis

BWI - STL

BWISTL

Baltimore/Washington

Fri 8/16

1 stop21h 34m

Lambert-St Louis

Tue 8/20

1 stop12h 31m

$160

Baltimore/WashingtonLambert-St Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 7/3

1 stop4h 47m

Lambert-St Louis

Sat 7/6

1 stop6h 26m

$302

Baltimore/WashingtonLambert-St Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 6/20

1 stop4h 55m

Lambert-St Louis

Fri 6/21

1 stop5h 58m

$325

Flights are sorted by cheapest first

Deals found on 6/5

How far ahead should I book a flight from Baltimore to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Baltimore to St. Louis. Price data was last updated on May 31, 2024.
To ensure you get the cheapest price possible for a flight from Baltimore to St. Louis, you should look to book at least 34 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Search Deals

What is the cheapest day to fly from Baltimore to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Baltimore to St. Louis. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Baltimore to St. Louis flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Baltimore to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Baltimore with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature and rainfall totals by month.

STL

Temperature

32 - 80.6 °F

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated June 6, 2024.
See what other customers who have flown with Frontier, Sun Country Air and Spirit Airlines from Baltimore to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,368 reviews

Comfort

7.9

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.0
Very good
10,368 reviews
Delta
8.0
Very good
10,368 reviews

Comfort

7.9

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

American Airlines
7.3
Good
14,227 reviews
Delta
8.0
Very good
10,368 reviews

Comfort

7.9

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Sun Country Air
7.2
Good
593 reviews
Delta
8.0
Very good
10,368 reviews

Comfort

7.9

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Spirit Airlines
6.4
Okay
8,567 reviews
Delta
8.0
Very good
10,368 reviews

Comfort

7.9

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Frontier
6.2
Okay
3,985 reviews
Delta
8.0
Very good
10,368 reviews

Comfort

7.9

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

Find useful and relevant information for your journey from Baltimore to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Baltimore to St. Louis?

    Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Baltimore/Washington. Booking flights from Baltimore/Washington (BWI) to Lambert-St Louis (STL) should be relatively easy as there are 4 daily flights to St. Louis from 6 different airlines. 2h 15m is how long a flight from Baltimore to Lambert-St Louis will take if you book a nonstop flight.

  • Can I find flights from Baltimore to St. Louis for under $100 on Cheapflights?

    Yes, there are multiple flights from Baltimore to St. Louis for under $100. The cheapest flight booked recently is on Spirit Airlines for just $100, but on average you can expect to pay $153.

  • Are there last-minute flights available from Baltimore to St. Louis for under $300?

    There are currently 20+ open flights from Baltimore to St. Louis within the next 7 days for less than $300.

  • What are the cheapest airlines flying from Baltimore to St. Louis round-trip?

    Flying on Spirit Airlines is currently your cheapest option to St. Louis, with prices starting at $100. Another option worth looking into is Frontier, starting at $151 round trip. Users have found that Spirit Airlines is 72% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Baltimore to St. Louis one-way?

    The cheapest airlines for a one-way flight from Baltimore to St. Louis are Spirit Airlines ($73), Frontier ($84), and Sun Country Air ($120).

  • What are the cheapest flights from Baltimore to St. Louis?

    Looking for the cheapest flight from Baltimore to St. Louis? While on average our users pay $346, our data indicates the cheapest price to be $346. The most popular route (Baltimore/Washington - Lambert-St Louis), is priced around $100.

  • What does BWI to STL mean?

    BWI stands for Baltimore/Washington Airport, while STL stands for Lambert-St Louis Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Baltimore to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your Baltimore to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Baltimore to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Baltimore to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Baltimore to St. Louis that include hotel bookings?

    Yes. In addition to deals on Baltimore to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Baltimore to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Baltimore to St. Louis.

  • Can I find deals for business class flights from Baltimore to St. Louis?

    Yes. Cheapflights offers flight deals from Baltimore to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Baltimore to St. Louis that allow pets onboard?

    Many airlines flying from Baltimore to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Baltimore to St. Louis?

    Yes, you can often find last-minute deals on Baltimore to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Baltimore to St. Louis flight deals updated?

    The Baltimore to St. Louis flight deals you see on this page were last updated on 6/6.

  • What are the most popular airlines that fly from Baltimore to St. Louis?

    Before booking your flight from Baltimore to St. Louis check out the most popular airlines for this route: American Airlines, Delta or Frontier.

  • What is the cheapest month to book a flight from Baltimore to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from Baltimore to St. Louis (average of $318). Flying from Baltimore to St. Louis in July is currently the most expensive (average of $365). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Baltimore to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.

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Top 5 airlines flying from Baltimore to St. Louis

Discover the top 5 airlines that operate flights from Baltimore to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$172FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$108Average$182FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$173Average$341FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$227Average$487FlexibilityNo cancel feeOn-time71%
DeltaCheapest$258Average$370FlexibilityNo cancel feeOn-timeN/A
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Search flights from Baltimore to St. Louis by cabin class

Find flights from Baltimore to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Baltimore to St. Louis

Find hourly flight availability from Baltimore to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 6, 2024.
29%of flight departuresEarly morningMidnight to 6 am
8%of flight departuresMorning6 am to noon
42%of flight departuresAfternoonNoon to 6 pm
21%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Baltimore to St. Louis

Explore weekly flight availability from Baltimore to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 6, 2024.
Sunday5daily flights
Monday4daily flights
Tuesday4daily flights
Wednesday4daily flights
Thursday4daily flights
Friday4daily flights
Saturday5daily flights

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