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BWI - STL

Find cheap flights from Baltimore to St. Louis from $37

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Baltimore to St. Louis departing on 6/4. 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.
1 adult
0 bags
Thu 6/6
Thu 6/13

Search hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to St. Louis, as well as popular online travel agencies
In the last 7 days travelers have searched 43,707,506 times on KAYAK, and here is why:

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Cheap flight deals from Baltimore to St. Louis (BWI-STL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Baltimore to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
10:12 pm - 6:40 pmBWI-STL
21h 28m2 stops
2:35 pm - 12:16 amSTL-BWI
8h 41m1 stop
$105Spirit Airlines
Find Deal
Wed, May 29 - Tue, Jun 4
10:12 pm - 5:29 pmBWI-STL
20h 17m1 stop
2:35 pm - 12:16 amSTL-BWI
8h 41m1 stop
$111Spirit Airlines
Find Deal
Wed, May 29 - Tue, Jun 4
6:14 am - 6:40 pmBWI-STL
13h 26m1 stop
2:35 pm - 12:16 amSTL-BWI
8h 41m1 stop
$115Spirit Airlines
Find Deal
Thu, May 30 - Tue, Jun 4
6:14 am - 1:37 pmBWI-STL
8h 23m1 stop
3:23 pm - 12:45 amSTL-BWI
8h 22m1 stop
$117Spirit Airlines
Find Deal
Tue, Jun 4 - Tue, Jun 11
8:28 pm - 8:10 pmBWI-STL
24h 42m1 stop
2:35 pm - 12:16 amSTL-BWI
8h 41m1 stop
Tue, May 28 - Tue, Jun 4
10:12 pm - 6:40 pmBWI-STL
21h 28m2 stops
10:34 am - 11:16 pmSTL-BWI
11h 42m2 stops
$128Spirit Airlines
Find Deal
Wed, May 29 - Tue, Jun 4
8:41 pm - 7:08 amBWI-STL
11h 27m1 stop
9:10 pm - 8:45 amSTL-BWI
10h 35m1 stop
$140Frontier
Find Deal
Sat, May 25 - Wed, May 29
8:15 pm - 7:07 amBWI-STL
11h 52m1 stop
8:02 pm - 12:39 pmSTL-BWI
15h 37m1 stop
$146Frontier
Find Deal
Sat, Jun 8 - Wed, Jun 12
8:00 am - 7:02 amBWI-STL
24h 02m1 stop
6:42 pm - 8:45 pmSTL-BWI
25h 03m1 stop
$155Frontier
Find Deal
Thu, Sep 12 - Sun, Sep 15
8:38 am - 7:07 amBWI-STL
23h 29m1 stop
7:44 pm - 7:47 amSTL-BWI
11h 03m1 stop
$157Frontier
Find Deal
Wed, Jun 5 - Thu, Jun 6

Flights from Baltimore to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from Baltimore to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Baltimore to St. Louis?

The average price of all flights from Baltimore to St. Louis clicked on KAYAK for each day over the last 12 months.
For Baltimore to St. Louis, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from St. Louis back to Baltimore, the best deals are generally found on Thursday, with Sunday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Baltimore to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Baltimore to St. Louis is January, where tickets cost $290 on average. On the other hand, the most expensive months are March and November, where the average cost of tickets is $378 and $355 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Baltimore to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Baltimore to St. Louis, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 75 days before departure.

Which airlines provide the cheapest flights from Baltimore to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Baltimore to St. Louis found on KAYAK was with Spirit Airlines for $37. Spirit Airlines proposed a round-trip connection from $105 and Frontier from $140.

Which airlines fly non-stop between Baltimore and St. Louis?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Baltimore to St. Louis.
There is just one airline that flies from Baltimore to St. Louis direct and that is Southwest. The best one-way deal found from Southwest for the route is $326.

How many flights are there between Baltimore and St. Louis per day?

Each day, there are between 3 and 8 nonstop flights that take off from Baltimore and land in St. Louis, with an average flight time of 2h 14m. The most common departure time is 6:00 am and most flights take off in the afternoon. Each week, there are 47 flights. The most frequent day of departure is Monday, when 17% of all weekly flights depart. The fewest flights depart on a Saturday.

Which cabin class options are there for flights between Baltimore and St. Louis?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

What’s the earliest departure time from Baltimore to St. Louis?

Early birds can take the earliest flight from Baltimore at 6:15 am and will be landing in St. Louis at 7:30 am.

What’s the latest departure time from Baltimore to St. Louis?

If you prefer to fly at night, the latest flight from Baltimore to St. Louis jets off at 9:20 pm and lands at 10:35 pm.

Good to know

Low season

February

High season

April

Cheapest flight

$37
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Baltimore to St. Louis

When to book flights from Baltimore to St. Louis

Are your dates flexible? Find out the best times to travel from Baltimore to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Baltimore to St. Louis

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

    In the last 3 days, the lowest price for a flight from Baltimore to St. Louis was $37 for a one-way ticket and $105 for a round-trip.

  • Do I need a passport to fly between Baltimore and St. Louis?

    No, a passport isn't needed to fly from Baltimore to St. Louis. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Baltimore to St. Louis?

    When flying out of Baltimore you will be using Baltimore/Washington. You will be landing at St. Louis, also known as Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from Baltimore to St. Louis?

    Only American Airlines offers inflight Wi-Fi service on the Baltimore to St. Louis flight route.

  • Which aircraft models fly most regularly from Baltimore to St. Louis?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Baltimore to St. Louis flight route.

  • On which days can I fly direct from Baltimore to St. Louis?

    There are nonstop flights from Baltimore to St. Louis on a daily basis.

  • Which is the best airline for flights from Baltimore to St. Louis, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Baltimore to St. Louis are United Airlines and American Airlines. With an average price for the route of $314 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $489 and an overall rating of 7.3.

  • How does KAYAK find such low prices on flights from Baltimore to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Baltimore to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Baltimore to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Baltimore is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Baltimore to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Baltimore with another airline. Booking your flights between Baltimore and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Baltimore to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Baltimore up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from Baltimore to St. Louis?

Find which airlines fly direct from Baltimore/Washington to Lambert-St Louis, which days they fly and book direct flights.

Nonstop departures

Baltimore/Washington to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Nonstop returns

Lambert-St Louis to Baltimore/Washington

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights
See more direct flights

Top 5 airlines serving from Baltimore to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Baltimore to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Baltimore to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.1
SouthwestOverall score based on 6075 reviews
8.7Crew
8.1Comfort
8.3Boarding
7.3Food
7.8Entertainment
Airline reviews

Worse experience especially since there were delays and unreasonable accommodations made

2.0 MediocreAnonymous, Mar 2024DAL - STL
Read more about Southwest reviews

Worse experience especially since there were delays and unreasonable accommodations made

The crew at the gate in Baltimore were rude and intimidating and insensitive to the needs of traveling families. They treated us like nuisance children ruining their day rather than the reasons they were working, paying customers with children who were anxious about the boarding experience. I would only travel Southwest again if it were the only option, especially if traveling with my children.

With COVID still around, I wish they wouldn't bunch us up so much at the boarding gates.

sw cancelled our flight 2 hours before we were to leave. Our bags were already checked. Only communication we had was a text that had a link to reschedule that did not work. When we finally got to front of line ticket agent said they could not get us on a flight until Wednesday. This was Sunday. 3 days. The. They stated since it was “weather” related they would not give us vouchers for food, hotel stay anything. So we had to book on a different airline costing us an extra $1000. Unacceptable.

Pleasant and responsive flight attendants. Adequate drinks menu Good sized, comfortable seats

I never like the fact that if I don't check in exactly 24 hours before the flight time, I get to board C, and that means sitting between 2 individuals. I would like assigned seating in the airplanes.

Two hour delay including one of them on the tarmac second year in a row we’ve had a bad experience. Sad that Southwest is no longer a bargain and has failed to keep up the customer service they were once so famous for.

Everything went smoothly and the plane wasn’t full. It was delayed though. .

Boarding and deboarding painfully slow. Southwest is typically delayed in my experience.

Appreciate that when flight was delayed, our next connection waited for us.

The gate area was incredibly short staffed, with one representative manning 4-5 flights, which caused a 3 hr delay in boarding even though the plane was all ready to leave. Other flights also were delayed because of this. The flight crew was awesome and I feel bad for the only gate worker on call, but Delta needs to hire more employees.

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

It was a good experience except when boarding a female flight attendant did not go out of her way to assist my teenage daughters in finding space for their carry-ons after their compartments were full.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

Even though we left CMI late, we mostly made up the time.

Delayed almost 4 hours for a 45 minute flight with no explanation.

Again, multiple delays and I eventually just canceled and drove!

Great crew. We were delayed so that late passengers could get on the flight. Love the bedding in business class. Good food. Great experience.

The CX617 from HK to BKK was delayed more than 1.5 hours.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

All four American Airlines flights I took in last seven days were delayed. Caused me loads of problems, missed meetings, loss of time and money.

American cancelled our flight home. Zero option for hotel, alternative transportation and took 3 hours to find our bags so we could take a 3 hour UBER ride home on our dime. Never flying AA again.

They gave my seat away although it was a connecting flight with them and the flight was a bit delayed.

Flight was cancelled had to move to another gate late again no internet paid for the month and never can use it waste of money

For it to have left on time! Instead of two hours early with zero notice

Flight kept delayed from morning to late afternoon so I had to make other arrangements

Crew was nice, explained emergency protocol very well. Flight took off and arrived on time. Pilot explained the small delay that occurred with docking and providing updates. I would definitely fly spirit again.

Terrible… missed our flight due to ridiculously long time to go thru baggage check-in!

The crew was not great or professional. It seemed like they didn't really want to be there. A true lack of effort for accommodating customers.

Everything was really good but the seats are not very comfortable.

I paid for WiFi, but it (WiFi) was very very slow, will never take again! Impossible open Utube 😤😤😤

I had no legroom, although I paid for extra legroom. I could barely put my bag in front of my feet and under the seat. The Wi-Fi was horrible. In fact the flight attendant said that they had to reboot it and see if it was going to work and never did.

The guy with severe body odor sat next to me. For the whole duration of the flight it was a torture. The airline should have better policy on limiting people with bad body odor to board the flight. Passengers should not be the ones to endure bad odor for the whole duration of the flight. The airline should be e the one to ensure decent air quality for ever passenger.

Overall it was a miserable experience... I will never fly spirit for more than a 3 hour flight or overnight.

Frontier is a crappy airline nothing about it is honest

I didn't get to do this flight l, hard to review

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Didn't like anything!! Horrible flight. Small seating area and hard seats. Butt was sore after 2 hour flight to Seattle No entertainment or free refreshments No wifi or USB charging receptacles to charge phone entoute like other airliners Luggage rates were 3 times as much as competitors. Difficult to navigate online luggue process to pre pay before flight Overall bad experience WILL NEVER RIDE OR RECOMMEND FRONTIER TO FRIENDS OR FAMILY MEMBERS!!! THIS IS A SHAME!! MOST MESERIBLE FLIGHT OF MY LIFE!! AND I THOUGHT SPIRIT WAS 👎 YOU GOT THEM BEAD HANDS DOWN!!

Flight was a little late taking off. Seats are too upright, no ports to charge devices, no wifi, no entertainment

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

Flight was canceled with little warning. Flight was rebooked through Ontario, California and connecting flight was delayed by over three hours. Frontier is living up to their Greyhound of the skies reputation for sure.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight was OK. Seats were good no cell phone charges on the plane no TVs or entertainment.

Book cheap flights from Baltimore to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Baltimore to St. Louis found on KAYAK in the last 72 hours.
6/4Tue
1 stopSpirit Airlines
8h 23mBWI-STL
$37
6/6Thu
1 stopSpirit Airlines
12h 17mBWI-STL
$70
5/15Wed
1 stopFrontier
11h 18mBWI-STL
$76
6/3Mon
1 stopSpirit Airlines
14h 56mBWI-STL
$77
6/15Sat
1 stopFrontier
11h 52mBWI-STL
$78
6/25Tue
1 stopSpirit Airlines
8h 38mBWI-STL
$80
6/6Thu
3 stops
30h 35mBWI-STL
$156
6/6Thu
3 stops
21h 45mBWI-STL
$174
5/12Sun
1 stopUnited Airlines
7h 22mBWI-STL
$314
6/15Sat
2 stopsAmerican Airlines
26h 12mBWI-STL
$488

Search by stops

Search by airline

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Last minute flights from Baltimore to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Baltimore to St. Louis that are departing in the next 10 days.
5/11Sat
multi-stopFrontier
11h 13mBWI-STL
5/16Thu
multi-stopFrontier
11h 27mSTL-BWI
$234
5/11Sat
multi-stopFrontier
11h 13mBWI-STL
5/15Wed
multi-stopFrontier
14h 04mSTL-BWI
$240
5/12Sun
multi-stopSpirit Airlines
18h 54mBWI-STL
5/14Tue
multi-stopSpirit Airlines
17h 07mSTL-BWI
$269
5/12Sun
multi-stopSpirit Airlines
18h 54mBWI-STL
5/14Tue
multi-stopSpirit Airlines
16h 40mSTL-BWI
$277
5/8Wed
multi-stop
23h 09mBWI-STL
5/11Sat
multi-stop
6h 03mSTL-BWI
$368
5/12Sun
multi-stop
18h 54mBWI-STL
5/13Mon
multi-stop
34h 08mSTL-BWI
$395
5/9Thu
multi-stopAmerican Airlines
5h 50mBWI-STL
5/14Tue
multi-stopAmerican Airlines
6h 39mSTL-BWI
$469
5/9Thu
multi-stopAmerican Airlines
4h 06mBWI-STL
5/13Mon
multi-stopAmerican Airlines
4h 26mSTL-BWI
$511
5/11Sat
multi-stopUnited Airlines
5h 08mBWI-STL
5/15Wed
multi-stopUnited Airlines
4h 50mSTL-BWI
$598
5/9Thu
multi-stopUnited Airlines
5h 08mBWI-STL
5/13Mon
multi-stopUnited Airlines
5h 14mSTL-BWI
$628

Search by stops

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Baltimore - St. Louis Flights

Departure:

Baltimore (undefined)United States

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Baltimore

Cabin classes: