$63+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BWI
Aug 1 — Aug 81
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 October, booked 32 days in advance, depart on a Thursday or Tuesday and return on a Wednesday
Cheap flight deals from St. Louis to Baltimore
Cheapest
Best
Last-minute
One-way
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 July 2, 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 July 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/254:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Tue 7/288:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 7/1![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Tue 7/288:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 7/1![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Wed 9/2310:35 am
STL
- BWI
1 stop7h 01m
Frontier
Sat 9/268:00 am
BWI
- STL
1 stop26h 40m
Frontier
Deal found 7/1![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 7/216:34 pm
STL
- BWI
1 stop20h 00m
Frontier
Tue 7/289:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 6/30![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/244:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Tue 7/288:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 7/1![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Sat 7/259:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Deal found 7/1![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 8/34:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Thu 8/139:32 pm
BWI
- STL
1 stop12h 25m
Frontier
Deal found 7/1![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 8/174:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Thu 8/209:32 pm
BWI
- STL
1 stop20h 50m
Frontier
Deal found 7/1![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 7/286:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Tue 8/48:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 6/28![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 10/1010:35 am
STL
- BWI
1 stop13h 09m
Frontier
Tue 10/139:29 pm
BWI
- STL
1 stop13h 11m
Frontier
Deal found 6/29![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 7/286:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Wed 7/299:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Deal found 6/28![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/254:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Thu 7/309:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 7/1![Frontier logo]()
$149
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 July 2, 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 July 2, 2026.
This Southwest deal was found by Cheapflights users on 6/27. 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 8/121:40 pm
STL
- BWI
Nonstop2h 00m
Southwest
Sat 8/159:25 am
BWI
- STL
1 stop5h 35m
Southwest
Deal found 6/27![Southwest logo]()
$269
This Delta deal was found by Cheapflights users on 7/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/265:45 pm
STL
- BWI
1 stop4h 10m
Delta
Wed 12/306:00 am
BWI
- STL
1 stop4h 36m
Delta
Deal found 7/1![Delta logo]()
$435
This Southwest deal was found by Cheapflights users on 6/29. 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 10/36:30 am
STL
- BWI
Nonstop2h 00m
Southwest
Sat 10/106:15 am
BWI
- STL
1 stop4h 10m
Southwest
Deal found 6/29![Southwest logo]()
$269
This Southwest deal was found by Cheapflights users on 6/29. 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 8/810:45 am
STL
- BWI
1 stop4h 50m
Southwest
Sat 8/159:40 am
BWI
- STL
Nonstop2h 10m
Southwest
Deal found 6/29![Southwest logo]()
$269
This Southwest deal was found by Cheapflights users on 7/1. 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 9/231:40 pm
STL
- BWI
Nonstop2h 00m
Southwest
Sat 9/262:20 pm
BWI
- STL
Nonstop2h 10m
Southwest
Deal found 7/1![Southwest logo]()
$289
This Southwest deal was found by Cheapflights users on 6/28. 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 8/86:45 am
STL
- BWI
Nonstop2h 05m
Southwest
Mon 8/105:45 pm
BWI
- STL
1 stop5h 35m
Southwest
Deal found 6/28![Southwest logo]()
$292
This Southwest deal was found by Cheapflights users on 6/27. 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 8/64:15 pm
STL
- BWI
Nonstop2h 00m
Southwest
Sat 8/89:40 am
BWI
- STL
Nonstop2h 10m
Southwest
Deal found 6/27![Southwest logo]()
$319
This Southwest deal was found by Cheapflights users on 7/1. 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.
Mon 7/279:55 am
STL
- BWI
1 stop3h 40m
Southwest
Tue 7/286:25 am
BWI
- STL
Nonstop2h 20m
Southwest
Deal found 7/1![Southwest logo]()
$377
Last-minute flights from St. Louis to BaltimoreDiscover last-minute flight deals from St. Louis to Baltimore. Data last updated July 2, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Baltimore. Data last updated July 2, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 7/216:34 pm
STL
- BWI
1 stop20h 00m
Frontier
Tue 7/289:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 6/30![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Tue 7/288:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 7/1![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Sat 7/259:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Deal found 7/1![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Thu 7/309:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 7/1![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Fri 7/249:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 7/1![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/244:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Tue 7/288:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 7/1![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/254:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Tue 7/288:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 7/1![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/254:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Thu 7/309:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 7/1![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 7/286:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Tue 8/48:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 6/28![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 7/286:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Wed 7/299:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Deal found 6/28![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 8/34:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Thu 8/139:32 pm
BWI
- STL
1 stop12h 25m
Frontier
Deal found 7/1![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 8/174:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Thu 8/209:32 pm
BWI
- STL
1 stop20h 50m
Frontier
Deal found 7/1![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 July 2, 2026.
Search for one-way flight options from St. Louis to Baltimore. Find affordable one-way fares based on user searches. Data last updated July 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 8/286:17 pm
STL
- BWI
1 stop12h 09m
Frontier
Deal found 7/1![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 7/294:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 7/2![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/286:34 pm
STL
- BWI
1 stop20h 00m
Frontier
Deal found 7/1![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Sat 7/254:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/30![Frontier logo]()
$66
This Trip.com deal was found by Cheapflights users on 6/28. 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.
Sat 9/2610:35 am
STL
- BWI
1 stop7h 01m
Frontier
Deal found 6/28![Frontier logo]()
$72
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Mon 7/274:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Deal found 6/30![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/2510:35 am
STL
- BWI
1 stop20h 54m
Frontier
Deal found 6/28![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 8/306:17 pm
STL
- BWI
1 stop12h 09m
Frontier
Deal found 7/2![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 8/236:17 pm
STL
- BWI
1 stop22h 26m
Frontier
Deal found 6/28![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 9/1810:35 am
STL
- BWI
1 stop20h 54m
Frontier
Deal found 6/29![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 7/306:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/30![Frontier logo]()
$91
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 July 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $122 (Kiwi.com) |
One-way from | $63 (Kiwi.com) |
Popular in | February |
Cheapest in | September |
Average price | $366 |
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 July 2, 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
Wed 8/12
1:40 pm-4:40 pm
Nonstop2h 00m
Baltimore/Washington
Sat 8/15
9:25 am-2:00 pm
1 stop5h 35m
$269
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sat 10/3
6:30 am-9:30 am
Nonstop2h 00m
Baltimore/Washington
Sat 10/10
6:15 am-9:25 am
1 stop4h 10m
$269
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sat 8/8
10:45 am-4:35 pm
1 stop4h 50m
Baltimore/Washington
Sat 8/15
9:40 am-10:50 am
Nonstop2h 10m
$269
Quickest round-trip
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Wed 9/23
1:40 pm-4:40 pm
Nonstop2h 00m
Baltimore/Washington
Sat 9/26
2:20 pm-3:30 pm
Nonstop2h 10m
$289
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sat 8/8
6:45 am-9:50 am
Nonstop2h 05m
Baltimore/Washington
Mon 8/10
5:45 pm-10:20 pm
1 stop5h 35m
$292
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Thu 8/6
4:15 pm-7:15 pm
Nonstop2h 00m
Baltimore/Washington
Sat 8/8
9:40 am-10:50 am
Nonstop2h 10m
$319
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Mon 7/27
9:55 am-2:35 pm
1 stop3h 40m
Baltimore/Washington
Tue 7/28
6:25 am-7:45 am
Nonstop2h 20m
$377
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Sat 12/26
5:45 pm-10:55 pm
1 stop4h 10m
Baltimore/Washington
Wed 12/30
6:00 am-9:36 am
1 stop4h 36m
$435
Cheapest one-way
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Mon 9/28
10:35 am-9:28 am
2 stops21h 53m
$132
St. LouisBaltimore
STL - BWI
STLBWI
Lambert-St Louis
Tue 7/21
6:20 pm-9:30 pm
Nonstop2h 10m
$145
Showing 1-10 of 19 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 July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | 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 31 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 $296). 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 July 2, 2026.
It’s typically best to fly out from St. Louis to Baltimore at noon. Doing so could potentially save you 12% 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 June 27, 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 July 2, 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
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
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 July 2, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on July 2, 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 July 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$153 | Average$218 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$196 | Average$297 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$239 | Average$429 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$273 | Average$384 | FlexibilityNo cancel fee | On-time71% |