$59+ Cheap flights from St. Louis to Baltimore (STL - BWI)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BWI
Jun 4 — Jun 111
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Baltimore with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Lambert-St Louis to Baltimore/Washington are usually found in September or July, booked 50 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday
Cheap flight deals from St. Louis to Baltimore
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Cheapest flights from St. Louis to BaltimoreExplore the most affordable flight options available from St. Louis to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 5, 2026.
Explore the most affordable flight options available from St. Louis to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/205:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Tue 5/269:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Deal found 4/30![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Mon 6/89:23 pm
BWI
- STL
1 stop21h 07m
Frontier
Deal found 5/4![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Tue 6/28:52 am
BWI
- STL
1 stop9h 41m
Frontier
Deal found 5/3![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Mon 6/19:23 pm
BWI
- STL
1 stop21h 10m
Frontier
Deal found 5/3![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Wed 5/279:13 pm
BWI
- STL
1 stop21h 20m
Frontier
Deal found 5/4![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Sun 6/76:45 am
BWI
- STL
1 stop27h 10m
Frontier
Deal found 5/1![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Sun 6/79:43 pm
BWI
- STL
1 stop12h 12m
Frontier
Deal found 4/30![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/146:31 pm
STL
- BWI
1 stop12h 04m
Frontier
Fri 6/199:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 5/3![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:06 pm
STL
- BWI
1 stop13h 29m
Frontier
Fri 6/129:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 5/2![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:31 pm
STL
- BWI
2 stops16h 42m
Multiple Airlines
Tue 6/161:29 pm
BWI
- STL
1 stop20h 23m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Thu 6/118:31 am
BWI
- STL
1 stop9h 59m
Frontier
Deal found 5/1![Frontier logo]()
$157
Best flights from St. Louis to BaltimoreDiscover carefully curated flight deals from St. Louis to Baltimore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 5, 2026.
Discover carefully curated flight deals from St. Louis to Baltimore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 5, 2026.
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:29 pm
STL
- BWI
1 stop6h 04m
United Airlines
Wed 6/37:05 pm
BWI
- STL
1 stop5h 24m
United Airlines
Deal found 5/4![United Airlines logo]()
$347
This Southwest deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:20 am
STL
- BWI
Nonstop2h 05m
Southwest
Tue 6/26:10 am
BWI
- STL
Nonstop2h 20m
Southwest
Deal found 5/3![Southwest logo]()
$367
This KAYAK deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:12 pm
STL
- BWI
1 stop5h 02m
American Airlines
Thu 7/161:54 pm
BWI
- STL
1 stop4h 28m
American Airlines
Deal found 5/1![American Airlines logo]()
$437
This Southwest deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/315:25 am
STL
- BWI
2 stops5h 15m
Southwest
Thu 6/45:35 pm
BWI
- STL
1 stop4h 25m
Southwest
Deal found 5/1![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:05 am
STL
- BWI
2 stops5h 55m
Southwest
Mon 5/256:05 am
BWI
- STL
1 stop5h 10m
Southwest
Deal found 5/1![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/246:40 am
STL
- BWI
Nonstop2h 05m
Southwest
Tue 5/266:10 am
BWI
- STL
Nonstop2h 20m
Southwest
Deal found 5/3![Southwest logo]()
$415
This Southwest deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:45 pm
STL
- BWI
Nonstop2h 00m
Southwest
Sun 6/79:50 am
BWI
- STL
Nonstop2h 15m
Southwest
Deal found 5/1![Southwest logo]()
$415
This Southwest deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:10 pm
STL
- BWI
Nonstop2h 00m
Southwest
Sun 6/79:50 am
BWI
- STL
Nonstop2h 15m
Southwest
Deal found 4/30![Southwest logo]()
$425
This Southwest deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/62:30 pm
STL
- BWI
Nonstop2h 05m
Southwest
Sun 6/149:50 am
BWI
- STL
Nonstop2h 15m
Southwest
Deal found 5/1![Southwest logo]()
$425
This Southwest deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/246:00 pm
STL
- BWI
Nonstop2h 00m
Southwest
Wed 5/275:15 pm
BWI
- STL
1 stop3h 35m
Southwest
Deal found 5/4![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:35 am
STL
- BWI
2 stops6h 10m
Southwest
Tue 5/261:55 pm
BWI
- STL
2 stops6h 20m
Southwest
Deal found 4/30![Southwest logo]()
$468
Last-minute flights from St. Louis to BaltimoreDiscover last-minute flight deals from St. Louis to Baltimore. Data last updated May 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Baltimore. Data last updated May 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/205:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Tue 5/269:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Deal found 4/30![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Wed 5/279:13 pm
BWI
- STL
1 stop21h 20m
Frontier
Deal found 5/4![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Mon 6/19:23 pm
BWI
- STL
1 stop21h 10m
Frontier
Deal found 5/3![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Tue 6/28:52 am
BWI
- STL
1 stop9h 41m
Frontier
Deal found 5/3![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Mon 6/89:23 pm
BWI
- STL
1 stop21h 07m
Frontier
Deal found 5/4![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Sun 6/79:43 pm
BWI
- STL
1 stop12h 12m
Frontier
Deal found 4/30![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Sun 6/76:45 am
BWI
- STL
1 stop27h 10m
Frontier
Deal found 5/1![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Thu 6/118:31 am
BWI
- STL
1 stop9h 59m
Frontier
Deal found 5/1![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:31 pm
STL
- BWI
2 stops16h 42m
Multiple Airlines
Tue 6/161:29 pm
BWI
- STL
1 stop20h 23m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:06 pm
STL
- BWI
1 stop13h 29m
Frontier
Fri 6/129:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 5/2![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/146:31 pm
STL
- BWI
1 stop12h 04m
Frontier
Fri 6/199:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 5/3![Frontier logo]()
$138
One-way flights from St. Louis to BaltimoreSearch for one-way flight options from St. Louis to Baltimore. Find affordable one-way fares based on user searches. Data last updated May 5, 2026.
Search for one-way flight options from St. Louis to Baltimore. Find affordable one-way fares based on user searches. Data last updated May 5, 2026.
This Trip.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:27 pm
STL
- BWI
1 stop23h 25m
Frontier
Deal found 5/1![Frontier logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 5/5![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/216:31 pm
STL
- BWI
1 stop23h 01m
Frontier
Deal found 5/4![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:27 pm
STL
- BWI
1 stop13h 08m
Frontier
Deal found 5/1![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:33 pm
STL
- BWI
1 stop27h 24m
Frontier
Deal found 5/4![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/255:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 5/1![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/265:06 pm
STL
- BWI
1 stop24h 27m
Frontier
Deal found 5/5![Frontier logo]()
$94
This Priceline deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/294:52 pm
STL
- BWI
1 stop5h 08m
Frontier
Deal found 5/5![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:33 pm
STL
- BWI
2 stops40h 42m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:52 pm
STL
- BWI
1 stop29h 08m
Frontier
Deal found 5/2![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/76:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 5/2![Frontier logo]()
$98
Find flight deals from St. Louis to Baltimore
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Baltimore (BWI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $124 (Kiwi.com) |
One-way from | $59 (Trip.com) |
Popular in | February |
Cheapest in | September |
Average price | $369 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Baltimore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
Use the filters below to find and compare flights from St. Louis to Baltimore that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Tue 6/2
5:29 pm-12:33 am
1 stop6h 04m
Baltimore/Washington
Wed 6/3
7:05 pm-11:29 pm
1 stop5h 24m
$347
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sat 5/30
6:20 am-9:25 am
Nonstop2h 05m
Baltimore/Washington
Tue 6/2
6:10 am-7:30 am
Nonstop2h 20m
$367
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sun 5/31
5:25 am-11:40 am
2 stops5h 15m
Baltimore/Washington
Thu 6/4
5:35 pm-9:00 pm
1 stop4h 25m
$399
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sat 5/23
7:05 am-2:00 pm
2 stops5h 55m
Baltimore/Washington
Mon 5/25
6:05 am-10:15 am
1 stop5h 10m
$399
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sun 5/24
6:40 am-9:45 am
Nonstop2h 05m
Baltimore/Washington
Tue 5/26
6:10 am-7:30 am
Nonstop2h 20m
$415
Quickest round-trip
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Wed 6/3
6:45 pm-9:45 pm
Nonstop2h 00m
Baltimore/Washington
Sun 6/7
9:50 am-11:05 am
Nonstop2h 15m
$415
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Thu 6/4
8:10 pm-11:10 pm
Nonstop2h 00m
Baltimore/Washington
Sun 6/7
9:50 am-11:05 am
Nonstop2h 15m
$425
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sat 6/6
2:30 pm-5:35 pm
Nonstop2h 05m
Baltimore/Washington
Sun 6/14
9:50 am-11:05 am
Nonstop2h 15m
$425
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sun 5/24
6:00 pm-9:00 pm
Nonstop2h 00m
Baltimore/Washington
Wed 5/27
5:15 pm-7:50 pm
1 stop3h 35m
$427
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Mon 7/13
6:12 pm-12:14 am
1 stop5h 02m
Baltimore/Washington
Thu 7/16
1:54 pm-5:22 pm
1 stop4h 28m
$437
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Baltimore
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Baltimore in May.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on St. Louis-Baltimore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Baltimore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Baltimore flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Baltimore flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Baltimore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Baltimore
Have a flexible travel schedule? Discover the best time to fly to Baltimore from St. Louis with our price prediction graph.
STL-BWI
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Baltimore
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How far ahead should I book a flight from St. Louis to Baltimore?
Booking 49 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Baltimore. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from St. Louis to Baltimore?
Currently, September is the cheapest month in which you can book a flight from St. Louis to Baltimore (average of $239). Flying from St. Louis to Baltimore in February is currently the most expensive (average of $493). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from STL to BWI?
Find hourly flight availability from St. Louis to Baltimore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 5, 2026.
It’s typically best to fly out from St. Louis to Baltimore at noon. Doing so could potentially save you 7% on the flight price compared to flying in the evening, which is usually more expensive.
What is the cheapest day to fly from St. Louis to Baltimore?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to Baltimore. Price data was last updated on May 2, 2026.
Travelers seeking maximum savings on their St. Louis to Baltimore flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
What’s the top layover airport for flights from St. Louis to Baltimore?
Share of 1-stop round-trip flights from St. Louis to Baltimore chosen by Cheapflights users in the past 12 months, using the same layover each way.
Chicago (MDW) – chosen by Cheapflights users on 67% of 1-stop itineraries from St. Louis to Baltimore on Cheapflights.
What’s the cheapest layover airport for flights from St. Louis to Baltimore?
Average round-trip fare for 1-stop flights from St. Louis to Baltimore, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Chicago (MDW) is the most affordable 1-stop option, with an average round-trip price of $486.
What’s the fastest layover option from St. Louis to Baltimore?
Shortest average travel time for 1-stop one-way flights from St. Louis to Baltimore, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 4h 20m.
Which airport typically offers the quickest layover for flights from St. Louis to Baltimore?
Average layover duration for 1-stop one-way flights from St. Louis to Baltimore, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Charlotte (CLT) offer the fastest connection on this route, with an average layover time of 0h 56m.
The best insider tips for St. Louis to Baltimore flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Baltimore trip
Our travel experts
Reviews of airlines servicing Baltimore
Get insights into the airlines that provide service to Baltimore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Baltimore. Reviews last updated May 5, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andAmerican Airlines from St. Louis to Baltimore to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Baltimore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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St. Louis and Baltimore flights
Browse other St. Louis and Baltimore flight options. Last updated on May 5, 2026.
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Top 4 airlines flying from St. Louis to Baltimore
Discover the top 4 airlines that operate flights from St. Louis to Baltimore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$126 | Average$297 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$147 | Average$218 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$249 | Average$398 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$273 | Average$412 | FlexibilityNo cancel fee | On-time71% |