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STL - BWI

Find cheap flights from St. Louis to Baltimore from $69

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 5/28. 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
Tue 6/4
Tue 6/11

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 43,369,418 times on KAYAK, and here is why:

Save 22% 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
11:11 am - 6:38 pmSTL-BWI
6h 27m1 stop
5:40 am - 10:11 amBWI-STL
5h 31m1 stop
$120Spirit Airlines
Find Deal
Tue, Jul 16 - Tue, Jul 23
10:34 am - 7:10 pmSTL-BWI
7h 36m1 stop
8:48 pm - 9:29 amBWI-STL
13h 41m1 stop
Tue, Jun 4 - Tue, Jun 11
11:39 am - 6:42 pmSTL-BWI
6h 03m1 stop
8:41 pm - 7:08 amBWI-STL
11h 27m1 stop
Sat, May 25 - Sat, Jun 1
5:25 pm - 7:19 amSTL-BWI
12h 54m1 stop
8:28 pm - 8:10 pmBWI-STL
24h 42m1 stop
$147Frontier
Find Deal
Sat, May 18 - Tue, May 21
10:34 am - 8:42 amSTL-BWI
21h 08m1 stop
10:12 pm - 4:25 pmBWI-STL
19h 13m1 stop
$149Spirit Airlines
Find Deal
Tue, May 28 - Fri, May 31
9:20 pm - 8:52 amSTL-BWI
10h 32m1 stop
1:03 pm - 9:37 amBWI-STL
21h 34m1 stop
$153Frontier
Find Deal
Mon, Sep 9 - Fri, Sep 13
5:15 am - 12:29 pmSTL-BWI
6h 14m1 stop
7:45 am - 5:18 pmBWI-STL
10h 33m1 stop
$248American Airlines
Find Deal
Wed, Jun 26 - Mon, Jul 1
7:00 am - 12:29 pmSTL-BWI
4h 29m1 stop
5:00 am - 8:33 amBWI-STL
4h 33m1 stop
$341American Airlines
Find Deal
Thu, Jun 20 - Fri, Jun 21
7:10 pm - 12:43 amSTL-BWI
4h 33m1 stop
9:50 am - 4:20 pmBWI-STL
7h 30m1 stop
$364Delta
Find Deal
Mon, May 27 - Thu, Jun 27
8:05 am - 2:11 pmSTL-BWI
5h 06m1 stop
6:30 am - 10:07 amBWI-STL
4h 37m1 stop
$384United Airlines
Find Deal
Wed, Sep 4 - Sun, Sep 8

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 $428 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 ($69) and Frontier ($83). The cheapest round-trip tickets were found on Spirit Airlines ($120) and Frontier ($147).

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

Each day, there are between 3 and 8 nonstop flights that take off from St. Louis and land in Baltimore, with an average flight time of 2h 02m. The most common departure time is 9:00 am and most flights take off in the morning. Each week, there are 36 flights. The most frequent day of departure is Wednesday, when 22% 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.

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

September

Cheapest flight

$69
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly and prices are also 19% lower on average.
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 $69 for a one-way ticket and $120 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 $364 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 $361 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 10826 reviews
8.2Boarding
8.0Entertainment
7.9Comfort
8.6Crew
7.4Food
Airline reviews

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.

10.0 ExcellentBranton, May 2024AVL - ATL
Read more about Delta reviews

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.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

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.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

All flights were on time and boarding was issue free

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Water service would be great. The way they board is terrible. Slow passengers first😂😂 They need to smart up a bit

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

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

Not being able to purchase my check in baggage online was a negative.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

WiFi connected but only let you go to the AA website, not even text messaging worked.

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.

The boarding attendant was slightly rude when I asked about checking our stroller. Made me feel like I was bothering her.

My wife and I are both handicapped and at boarding they upgraded us to a seat closer to the front rather than all the way towards the back. Much appreciated.

Not much seat room, but that was unexpected. But the seat headrest was very uncomfortable.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries.

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.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Flight cancelled and was told by a rude gate agent that they don’t accommodate on other airlines. Had to wait 5 hours for a connecting flight that had a 7 hour layover. Would not allow bags to be checked early so we couldn’t go through security .Had to rent a car for the afternoon to store bags and get a meal. Also incurred a hotel fee. No apology or reason given for the cancellation- just rudeness.

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.
5/28Tue
1 stopSpirit Airlines
16h 40mSTL-BWI
$69
6/6Thu
1 stopFrontier
11h 03mSTL-BWI
$83
5/17Fri
1 stopFrontier
11h 46mSTL-BWI
$85
5/28Tue
2 stopsSpirit Airlines
17h 07mSTL-BWI
$90
5/15Wed
1 stopFrontier
14h 04mSTL-BWI
$92
6/1Sat
1 stopSpirit Airlines
6h 03mSTL-BWI
$93
6/6Thu
2 stopsSpirit Airlines
19h 19mSTL-BWI
$100
7/14Sun
1 stopSun Country Air
15h 21mSTL-BWI
$120
6/21Fri
1 stopSun Country Air
14h 01mSTL-BWI
$130
6/6Thu
2 stopsAmerican Airlines
7h 57mSTL-BWI
$461

Search by stops

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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.
5/9Thu
multi-stopFrontier
22h 51mSTL-BWI
5/16Thu
multi-stopFrontier
10h 08mBWI-STL
$234
5/9Thu
multi-stopFrontier
22h 51mSTL-BWI
5/13Mon
multi-stopFrontier
11h 41mBWI-STL
$257
5/7Tue
multi-stopFrontier
17h 39mSTL-BWI
5/10Fri
multi-stopFrontier
22h 18mBWI-STL
$326
5/6Mon
multi-stop
31h 41mSTL-BWI
5/10Fri
multi-stop
19h 13mBWI-STL
$398
5/8Wed
multi-stop
30h 55mSTL-BWI
5/10Fri
multi-stop
19h 13mBWI-STL
$411
5/6Mon
multi-stopAmerican Airlines
4h 07mSTL-BWI
5/11Sat
multi-stopAmerican Airlines
4h 06mBWI-STL
$473
5/6Mon
multi-stopAmerican Airlines
4h 30mSTL-BWI
5/9Thu
multi-stopAmerican Airlines
5h 53mBWI-STL
$520
5/8Wed
multi-stopSpirit Airlines
24h 52mSTL-BWI
5/10Fri
multi-stopSpirit Airlines
19h 13mBWI-STL
$538
5/8Wed
multi-stopSpirit Airlines
24h 52mSTL-BWI
5/11Sat
multi-stopSpirit Airlines
25h 04mBWI-STL
$578
5/6Mon
multi-stopUnited Airlines
6h 55mSTL-BWI
5/10Fri
multi-stopUnited Airlines
5h 54mBWI-STL
$888

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St. Louis - Baltimore Flights

Departure:

St. Louis (STL)United States

Destination:

Baltimore (BWI)United States

Return flight deals:

Baltimore - St. Louis

Cabin classes: