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STL - BWI

$38 Find cheap flights from St. Louis to Baltimore

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 9/10. 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
Wed 7/10
Wed 7/17

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 42,898,604 times on KAYAK, and here is why:

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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
7:33 pm - 7:50 amSTL-BWI
11h 17m1 stop
8:54 pm - 9:25 amBWI-STL
13h 31m1 stop
$143Frontier
Find Deal
Tue, Jul 23 - Tue, Jul 30
10:32 pm - 12:03 pmSTL-BWI
12h 31m1 stop
8:00 am - 8:20 pmBWI-STL
13h 20m1 stop
$145Frontier
Find Deal
Tue, Aug 20 - Mon, Sep 2
10:32 pm - 12:03 pmSTL-BWI
12h 31m1 stop
10:10 am - 7:07 amBWI-STL
21h 57m1 stop
Tue, Aug 20 - Wed, Sep 4
8:12 am - 8:44 pmSTL-BWI
11h 32m1 stop
6:55 pm - 7:07 amBWI-STL
13h 12m1 stop
$167Spirit Airlines
Find Deal
Wed, Aug 21 - Wed, Sep 4
10:11 am - 5:26 pmSTL-BWI
6h 15m1 stop
10:40 pm - 5:29 pmBWI-STL
19h 49m1 stop
$170Spirit Airlines
Find Deal
Tue, Jul 16 - Wed, Jul 24
3:23 pm - 4:02 pmSTL-BWI
23h 39m1 stop
8:54 pm - 9:25 amBWI-STL
13h 31m1 stop
Tue, Jul 9 - Tue, Jul 16
3:18 pm - 10:06 pmSTL-BWI
5h 48m1 stop
1:33 pm - 4:56 pmBWI-STL
4h 23m1 stop
$180American Airlines
Find Deal
Wed, Jul 10 - Tue, Jul 23
7:15 am - 3:34 pmSTL-BWI
7h 19m1 stop
8:05 am - 1:24 pmBWI-STL
6h 19m1 stop
$195Delta
Find Deal
Tue, Aug 20 - Sat, Sep 7
11:25 am - 4:12 pmSTL-BWI
3h 47m1 stop
6:05 am - 9:08 amBWI-STL
4h 03m1 stop
$384Delta
Find Deal
Tue, Jul 2 - Sun, Jul 7
6:22 am - 11:09 amSTL-BWI
3h 47m1 stop
6:48 am - 4:11 pmBWI-STL
10h 23m2 stops
$425American Airlines
Find Deal
Fri, Nov 1 - Thu, Nov 28

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 Tuesday and more expensive on a Sunday. On your return trip to St. Louis, you should consider flying back on a Wednesday, and avoid Mondays 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 December, where the average cost of tickets is $440 and $388 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 4 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 ($38) and Frontier ($85). The cheapest round-trip tickets were found on Frontier ($143) and Spirit Airlines ($167).

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

Each day, there are between 4 and 9 nonstop flights that take off from St. Louis and land in Baltimore, with an average flight time of 2h 00m. The most common departure time is 6:00 pm and most flights take off in the evening. Each week, there are 42 flights. The most frequent day of departure is Friday, when 21% 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

June

Cheapest flight

$38
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 9% 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 $38 for a one-way ticket and $143 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 $362 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 10295 reviews
8.6Crew
7.4Food
8.0Entertainment
8.2Boarding
7.9Comfort
Airline reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

2.0 MediocreCraig, Jun 2024CVG - LGA
Read more about Delta reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

Among the poorest flights I’ve had with Delta in a while. Entertainment system failed completely on a 7.5 hr flight. Crew seemed distracted and not the normal friendly crew. Flight overbooked it seemed… very crowded.

If I can, I always fly Delta. I’ve found their service to always be reliable and pleasant.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

It was pretty good I was worried with the short Layover that I might not catch my connection but the gate was there

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

It is a modern tragedy that any airline expects you to travel for 14 hours in such discomfort and that the only way to add comfort is exorbitant prices. I was in pain by the time we landed. Shameful.

Original plane sidelined. Had to wait an hour for replacement.

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

No real agent onsite helping you for missing luggage there. Not like the other airline next to UA desk, they have staff attending in their desk assisting answer/helping luggage issue, even after midnight.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

After the morning frenzy of 35 min wait through CLT security at 4;30 AM, it was nice to have a smooth pleasant boarding experience. This 6:30 AM flight was not full. We were able to get seated swiftly and took off promptly. Nice touch they distributed the old fashioned headsets with 8 mm jacks. Snacks were decent and arrival was uneventful.

My window shade didn’t work. So I missed coming into my city. ☹️

Flight was delayed in the gate by 5 hours and ultimately cancelled- rebooking service by United agents was terrible

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

Not worth the price of premium class ticket paid, felt more like steerage.

This is by far the worst experience I have had with American Airlines. The start of this trip was a complete disaster. I purposely planned my trip so that I would weather any delays so that I could make very important meeting at the Pentagon. My flight was cancelled because of maintenance and I was put on the first flight the next day but I was late to the meeting. After a long week at the Pentagon I just wanted to go home and my flight home which was early in the day was delayed. Eventually the flight was delayed until the next day. I was not authorized a hotel room because DCA was my point of origin. So I paid for a hotel out of pocket. The flight this morning was boarded then deplaned because the aircraft was hot. The flow of information was not happening in DCA and made it worse when the news was bad. I am going to take a break from American for my next few military flights. Hopefully whatever has been going on with American Airlines will be resolved.

We had a 2 hour delay. The seats were smaller than most other airlines. The person in front of us wanted to lay back and we had to stop her because she was pressing against my girlfriend’s legs. We had to ask her to sit up and not lay back due to the lack of room.

Everything was fine once we actually got on our flight. It was more then annoying they canceled (delayed) our flight. We lost out on a day of our trip along with money on our stay. Plus we had to book another hotel. So expensive.

This flight was canceled and delayed several times without explanation. The plane was freezing cold and no wifi for messaging. Getting off the plane was terribly unorganized and felt like it took forever….

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Terrible. I didn’t fly and I had an important meeting the next day.

Equipment swap led to 2+ hour delay on international flight. And to top it off, boarding took forever.

Wretched scheduling - they got themselves into a critical crew situation and didn’t try to address it until 15 minutes before they had to cancel my flight

Flight was canceled less than 6 hours before takeoff, rebooked on a flight that was twice as long and left earlier so we couldn’t make it, when using text support option took over 2 hours to speak with someone.

Not enough help at airport during boarding process. Flight was delayed. Overall WORST flying experience I’ve ever had. Will NEVER FLT SPIRIT AGAIN

Terrible legroom, seats do not recline, tray table the size of an iPhone, delayed flight, have to pay 5$ to get a cup of water onboard.

Could have TV/Movie and some water ou soda free

Flight was good and clean but delayed over an hour on the return flight.

The non stop flight and able to go into Atlantic City airport. They could lower the prices. It starts out low but then if you want to bring luggage and pick your seat the price goes up quite a bit.

Flight got diwngraded last minute and left us stranded. I was told I’ll be given credit for my luggage and seat upgrades but haven’t got anything yet

We can’t predict circumstances like this ahead of time, but I give your staff a hats off for immediately giving us updated informations.

It was nice! There was a very unhappy child in front of us and the flight attendant did a great job calming the child. I was impressed.

The plane was not on time for boarding or departure or arrivals.

I strongly dislike Frontier. I find them barebones, the seats not particularly comfortable, the nickel and diming is maddening, the app is TERRIBLE - super confusing to navigate, and the last 4 frontier flights I have flown have been on AVERAGE 2 hours late, one ruining a fancy night out in Vegas with reservations made well in advance, which was nodded to with a measly 5000 miles, which translates to almost nothing. At least credit a free checked bag or something.

8 hr delay. had to buy another ticket with another airline

Four and a half hour delay in total. What frustrates me most is the poor communication and disorganization.

I appreciated the upgrade to free cary-on bag and seat selection at no charge

FRONTIER SUCKS! The agent downstairs tricked me into booking, just to get to the gate. At the gate, they told me they couldn't help. I then called Customer Service. They and the gate attendants kept blaming each other. Neither side was willing to help the customer.

The agent at check-in was strident, unwelcoming, and condescending to customers ahead of me.

Flight was delay 9hrs and nothing was provided at airport, had to go and get a room to sleep in, paid for Uber back and fort with no offers until we landed back home a 1hr later for a $75 voucher for a future flight.

Didn't like anything..entire crew was very rude to everyone on the flight. Plane old and the trays fall down on you the while time you're flying. Charged more for a carry on bag than for the plane ticket itself. Did make it from point a to point b, but worth the extra money to fly with another airline

9 hours of delay!! Was not able to check my luggage that I paid for!!!

It was delayed 9 hours for operational reasons, despite the plane arriving to the airport on time.

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.
9/10Tue
1 stopSpirit Airlines
6h 52mSTL-BWI
$38
9/10Tue
2 stopsSpirit Airlines
23h 45mSTL-BWI
$62
7/23Tue
1 stopSpirit Airlines
11h 24mSTL-BWI
$69
7/16Tue
1 stopFrontier
11h 17mSTL-BWI
$85
8/18Sun
1 stopFrontier
13h 10mSTL-BWI
$93
7/1Mon
1 stopUnited Airlines
15h 24mSTL-BWI
$182
7/1Mon
2 stopsAmerican Airlines
17h 21mSTL-BWI
$247
7/7Sun
1 stopDelta
7h 22mSTL-BWI
$342
7/8Mon
1 stopDelta
6h 11mSTL-BWI
$366
7/8Mon
2 stopsAmerican Airlines
10h 08mSTL-BWI
$509

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.
6/13Thu
multi-stopFrontier
11h 03mSTL-BWI
6/22Sat
multi-stopFrontier
11h 52mBWI-STL
$178
6/14Fri
multi-stopFrontier
18h 04mSTL-BWI
6/22Sat
multi-stopFrontier
11h 52mBWI-STL
$188
6/15Sat
multi-stop
6h 06mSTL-BWI
6/22Sat
multi-stop
11h 52mBWI-STL
$207
6/15Sat
multi-stop
6h 06mSTL-BWI
6/18Tue
multi-stop
13h 41mBWI-STL
$287
6/15Sat
multi-stopSpirit Airlines
13h 13mSTL-BWI
6/23Sun
multi-stopSpirit Airlines
11h 42mBWI-STL
$299
6/15Sat
multi-stopSpirit Airlines
6h 06mSTL-BWI
6/19Wed
multi-stopSpirit Airlines
21h 37mBWI-STL
$318
6/14Fri
multi-stopAmerican Airlines
4h 29mSTL-BWI
6/21Fri
multi-stopAmerican Airlines
4h 47mBWI-STL
$451
6/11Tue
multi-stopDelta
4h 22mSTL-BWI
6/12Wed
multi-stopDelta
4h 56mBWI-STL
$478
6/15Sat
multi-stopDelta
5h 47mSTL-BWI
6/17Mon
multi-stopDelta
4h 55mBWI-STL
$578
6/12Wed
multi-stopAmerican Airlines
5h 56mSTL-BWI
6/15Sat
multi-stopAmerican Airlines
10h 26mBWI-STL
$777

Search by stops

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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: