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STL - BWI

Find cheap flights from St. Louis to Baltimore from $78

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Baltimore departing on 6/2. 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 6/13
Thu 6/20

Search hundreds of travel sites at once for deals on flights to Baltimore

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Baltimore, 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 St. Louis to Baltimore, as well as popular online travel agencies
In the last 7 days travelers have searched 41,771,603 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

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

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Baltimore 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
10:34 am - 8:35 amSTL-BWI
21h 01m1 stop
10:45 pm - 5:28 pmBWI-STL
19h 43m1 stop
$114Spirit Airlines
Find Deal
Tue, Jun 4 - Wed, Jun 5
5:56 pm - 7:19 amSTL-BWI
12h 23m1 stop
8:41 pm - 7:08 amBWI-STL
11h 27m1 stop
$140Frontier
Find Deal
Sat, May 25 - Sat, Jun 1
7:44 pm - 7:53 amSTL-BWI
11h 09m1 stop
8:28 pm - 7:22 amBWI-STL
11h 54m1 stop
$145Frontier
Find Deal
Thu, May 30 - Tue, Jun 4
7:30 pm - 11:10 amSTL-BWI
14h 40m1 stop
10:45 pm - 7:22 pmBWI-STL
21h 37m2 stops
$147Spirit Airlines
Find Deal
Sun, Jun 2 - Wed, Jun 5
7:44 pm - 8:25 amSTL-BWI
11h 41m1 stop
10:45 pm - 5:28 pmBWI-STL
19h 43m1 stop
Sun, Jun 2 - Wed, Jun 5
9:20 pm - 8:52 amSTL-BWI
10h 32m1 stop
5:40 am - 10:24 amBWI-STL
5h 44m1 stop
Wed, Jul 10 - Tue, Jul 16
5:04 am - 12:31 pmSTL-BWI
6h 27m1 stop
5:00 am - 8:19 amBWI-STL
4h 19m1 stop
$351American Airlines
Find Deal
Tue, May 28 - Sat, Aug 10
3:27 pm - 11:08 pmSTL-BWI
6h 41m1 stop
6:09 pm - 11:39 pmBWI-STL
6h 30m1 stop
$354Delta
Find Deal
Tue, May 28 - Sat, Aug 10
3:43 pm - 9:37 pmSTL-BWI
4h 54m1 stop
6:30 am - 2:18 pmBWI-STL
8h 48m1 stop
$379United Airlines
Find Deal
Sat, Jun 29 - Fri, Jul 5
2:00 pm - 7:26 pmSTL-BWI
4h 26m1 stop
5:00 am - 9:53 amBWI-STL
5h 53m1 stop
$438American Airlines
Find Deal
Fri, May 31 - Sun, Jun 2

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

Get data-powered insights and trends into flights from St. Louis to Baltimore 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 St. Louis to Baltimore?

The average price of all flights from St. Louis to Baltimore clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Baltimore on a Thursday and more expensive on a Sunday. On your return trip to St. Louis, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Baltimore, 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 St. Louis to Baltimore is October, where tickets cost $272 on average. On the other hand, the most expensive months are March and June, where the average cost of tickets is $440 and $416 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to Baltimore, 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 St. Louis to Baltimore, you should book around 3 days before departure. For the absolute cheapest price, our data suggests you should book 15 days before departure.

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

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on Spirit Airlines ($78) and Frontier ($80). The cheapest round-trip tickets were found on Spirit Airlines ($114) and Frontier ($140).

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

Each day, there are between 7 and 10 nonstop flights that take off from St. Louis and land in Baltimore, with an average flight time of 2h 01m. The most common departure time is 7:00 pm and most flights take off in the morning. Each week, there are 57 flights. The most frequent day of departure is Sunday, when 18% of all weekly flights depart. The fewest flights depart on a Saturday.

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

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.

How long does a flight from St. Louis to Baltimore take?

Direct flights cover the 736 miles separating St. Louis to Baltimore in about 2h 00m.

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

Early birds can take the earliest flight from St. Louis at 5:15 am and will be landing in Baltimore at 8:15 am.

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

If you prefer to fly at night, the latest flight from St. Louis to Baltimore jets off at 8:55 pm and lands at 11:55 pm.

Good to know

Low season

February

High season

June

Cheapest flight

$78
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from St. Louis to Baltimore

When to book flights from St. Louis to Baltimore

Are your dates flexible? Find out the best times to travel from St. Louis to Baltimore 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 St. Louis to Baltimore

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

    In the last 3 days, the lowest price for a flight from St. Louis to Baltimore was $78 for a one-way ticket and $114 for a round-trip.

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

    A passport is not required to fly from St. Louis to Baltimore.

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to Baltimore are Delta and United Airlines. With an average price for the route of $357 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $360 and an overall rating of 7.4.

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

    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 St. Louis to Baltimore.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Baltimore from St. Louis 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 St. Louis to Baltimore?

    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 Baltimore with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and BWI 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 St. Louis to Baltimore?

    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 Baltimore from St. Louis 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 St. Louis to Baltimore?

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

Nonstop departures

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

Nonstop returns

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
See more direct flights

Top 5 airlines serving from St. Louis to Baltimore

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Baltimore. 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 St. Louis to Baltimore? 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.
8.0
DeltaOverall score based on 10736 reviews
7.4Food
8.6Crew
8.2Boarding
8.0Entertainment
7.9Comfort
Airline reviews

Absolutely nothing flight was cancelled and delayed for 2 days. Barely a heads up I want a full refund

2.0 MediocreDevan, May 2024AUS - BOS
Read more about Delta reviews

Absolutely nothing flight was cancelled and delayed for 2 days. Barely a heads up I want a full refund

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Best airline! Always friendly and welcoming. Skyclub was great and loved the fast free wifi on board. I also love that you can pre-order your meal on the app!

Atlanta boarding crew at gate were filled with arrogance and were disrespectful. In flight crew showed indifference to the needs of passengers. This is about the flight from ATL to BDL.

Boarding was somewhat chaotic. Unable to evaluate crew or food/drink because captain kept them seated due to turbulence. Have no idea if entertainment was offered.

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!!!

No lounge access with “United First” ticket. False alarm about late flight, jeopardizing connection. Wrong meal. Loose power socket would not hold plug, could not charge device. In-flight access to text messaging did not work. Toilet seat on plane would not stay up.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

This flight was delayed multiple times and eventually canceled around 2-3ish. Original take off time was around 10:30am. By 3, there were no other options out of Houston, so stuck in Houston for from 3pm - 11am the next day.

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Liked - nothing. Disliked - delayed 35+ min sitting on the plane. Caused me to miss my connection in Charlotte. American Airlines is the worst US Air Carrier company with atrocious customer service.

Worst situation ever! I booked my tickets for this trip on Alaska Airlines. I guess AA is a partner and we flew nonstop from Eugene to PHX on an AA jet. I had to pay for luggage from PHX to EUG. And this was an Alaska Airlines reservation paid for with Alaska airlines credit card! Got to the PHX airport and was not able to check bags because of some weird issue with the AA software. My reservation had to be the-entered by the agent. I will never pick another American Airlines flight on the Alaska Airlines website. While on vacation, I tried to upgrade our seats for the trip home. The request just buffered and never went through. I tried four times and was charged four times on my credit card. The card was charged but the seats were never changed. What a wreck!

Left from gate 30 minutes before flight. Never been late to a flight ever. It says 15 minutes before explicitly on the ticket.

I like the boarding process, it was fast. The seat doesn’t have a TV for a long flight and food wasn’t served, just snacks.

Use planes with TVs on flights over 4 hours. The free entertainment was a cheap in between solution for a very long flight that you don't even bother providing meals or decent snacks.

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.

They stuck us with multiple extra fees. I will never fly spirit again

Arrived 3 hours early and never made it past baggage drop

Flight delayed then canceled! I will NEVER fly Spirit Airlines again and will tell all my friends!

Absolutely terrible. The boarding process had zero organization. Mobs of people trying to board. People were climbing over my child's stroller with her in it. No families were boarded first. Boarding was delayed with no reasoning or notification that it would be late. We were then stuck on the plane for 45 minutes after landing. Then waited over two hours for our luggage. There was zero communication with the travelers. Never have I experienced such I professionalism and disgrace of others. Extremely disappointed.

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.

Over an hour delay in departure but I was notified beforehand. Another delay on tarmac upon arrival at LGA. We ended up departing the plane almost 2 hours later than expected

I fly Frontier because it’s affordable. I understand that the seats are tight and not the most comfortable…but that’s part of it. The problem with this flight was that there was a group of travelers directly behind me at the back of the plane who were ridiculously loud and obnoxious the entire flight. I’m pretty sure they were drunk and I could periodically smell an odd odor that I believe was one of them using a smokeless vape pen. The stewards had to remind them to keep quiet during the pre-flight instruction, but that was it. They never said another thing to them for the rest of the flight. It was a miserable.

I checked a bag because it was $5 less than carry on. They managed to lose my bag on a 2.5 hr direct flight! Frontier has no airport staff at baggage claim to help. As soon as I got home around 11 pm I tried to use their online system to file the claim for lost bag - system wouldn't take the # on my baggage claim ticket - said it was not the correct number. Also said that I had not checked a bag, which wasn't true - even my online boarding pass showed that I had checked a bag. Wasted about an hour on that process with no luck. Tried again in the morning - same thing. So tried online chat with Frontier bot - waited 35-40" twice to be connected to a baggage agent and it never happened. Eventually drove to PDX after work and waited 2 hrs for the Frontier ticket agents to arrive prior to the next Frontier flight out of PDX and FINALLY got some help from one of them, to take me to lost luggage area where I was able to retrive my bag. Probably took 4-5 hrs. of my time and endless frustration to get my bag. This was my first -- and LAST -- experience flying Frontier Airlines. Check-in was also extremely difficult and time consuming. The flight itself (and staff) were fine but everything else about the experience was a total disaster! The fact that Frontier literally has NO WAY to connect to a human voice for customer service (in this case for lost luggage) is the WORST!!!!!

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.

Book cheap flights from St. Louis to Baltimore

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Baltimore found on KAYAK in the last 72 hours.
6/2Sun
1 stopSpirit Airlines
14h 40mSTL-BWI
$78
5/25Sat
1 stopFrontier
12h 23mSTL-BWI
$80
7/7Sun
1 stopSun Country Air
15h 47mSTL-BWI
$140
5/20Mon
2 stops
31h 51mSTL-BWI
$146
5/24Fri
2 stops
26h 17mSTL-BWI
$192
5/26Sun
1 stopSun Country Air
15h 20mSTL-BWI
$208
5/22Wed
1 stopAmerican Airlines
4h 30mSTL-BWI
$211
5/22Wed
1 stopDelta
5h 13mSTL-BWI
$212
5/19Sun
1 stopDelta
6h 41mSTL-BWI
$385
6/6Thu
2 stopsAmerican Airlines
7h 57mSTL-BWI
$457

Search by stops

Search by airline

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Last minute flights from St. Louis to Baltimore

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 St. Louis to Baltimore that are departing in the next 10 days.
5/15Wed
multi-stopFrontier
14h 04mSTL-BWI
5/21Tue
multi-stopFrontier
24h 42mBWI-STL
$258
5/15Wed
multi-stopFrontier
14h 04mSTL-BWI
5/17Fri
multi-stopFrontier
21h 52mBWI-STL
$268
5/16Thu
multi-stopFrontier
11h 28mSTL-BWI
5/22Wed
multi-stopFrontier
26h 24mBWI-STL
$295
5/15Wed
multi-stopFrontier
14h 04mSTL-BWI
5/22Wed
multi-stopFrontier
26h 24mBWI-STL
$297
5/15Wed
multi-stop
24h 20mSTL-BWI
5/21Tue
multi-stop
26h 13mBWI-STL
$339
5/19Sun
multi-stop
10h 54mSTL-BWI
5/26Sun
multi-stop
9h 00mBWI-STL
$368
5/15Wed
multi-stop
24h 20mSTL-BWI
5/22Wed
multi-stop
35h 20mBWI-STL
$381
5/17Fri
multi-stopAmerican Airlines
4h 30mSTL-BWI
5/19Sun
multi-stopAmerican Airlines
5h 53mBWI-STL
$625
5/16Thu
multi-stopSpirit Airlines
13h 23mSTL-BWI
5/22Wed
multi-stopSpirit Airlines
21h 28mBWI-STL
$671
5/15Wed
multi-stopAmerican Airlines
9h 49mSTL-BWI
5/17Fri
multi-stopAmerican Airlines
7h 09mBWI-STL
$872

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St. Louis - Baltimore Flights

Departure:

St. Louis (undefined)United States

Destination:

Baltimore (BWI)United States

Return flight deals:

Baltimore - St. Louis

Cabin classes: