$48+ Cheap flights from St. Louis to Baltimore (STL - BWI)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BWI
Oct 31 — Nov 71
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 April or September, booked 46 days in advance, depart on a Tuesday or Thursday 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 October 1, 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 October 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 10/286:44 pm -
1 stop4h 49m
Tue 11/109:12 pm -
1 stop21h 28m
Deal found 9/30![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 10/266:35 pm -
1 stop14h 15m
Wed 11/1110:45 am -
1 stop7h 55m
Deal found 9/30![Frontier logo]()
$106
This Mytrip deal was found by Cheapflights users on 9/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:44 pm -
1 stop4h 49m
Wed 11/45:40 am -
1 stop13h 00m
Deal found 9/30![Frontier logo]()
$107
This Cheapflightsfares deal was found by Cheapflights users on 9/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:35 pm -
1 stop4h 59m
Wed 10/2810:45 am -
1 stop7h 55m
Deal found 9/27![Frontier logo]()
$120
This CheapOair deal was found by Cheapflights users on 10/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:35 pm -
1 stop4h 59m
Wed 10/2810:45 am -
1 stop7h 55m
Deal found 10/1![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 10/266:35 pm -
1 stop14h 15m
Thu 10/299:12 pm -
1 stop21h 28m
Deal found 9/30![Frontier logo]()
$130
This Frontier deal was found by Cheapflights users on 9/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:44 pm -
1 stop4h 49m
Wed 11/1110:45 am -
1 stop7h 55m
Deal found 9/30![Frontier logo]()
$131
This Cheapflightsfares deal was found by Cheapflights users on 9/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:35 pm -
1 stop4h 59m
Sat 10/243:15 pm -
1 stop8h 58m
Deal found 9/29![Frontier logo]()
$134
This Frontier deal was found by Cheapflights users on 10/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:44 pm -
1 stop4h 49m
Mon 11/1610:16 am -
1 stop8h 24m
Deal found 10/1![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 9/29. 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.
Wed 11/116:44 pm -
1 stop4h 49m
Fri 11/136:24 am -
1 stop12h 16m
Deal found 9/29![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 9/30. 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.
Fri 10/236:35 pm -
1 stop4h 59m
Mon 10/269:52 pm -
2 stops44h 48m
Deal found 9/30![Frontier logo]()
$143
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 October 1, 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 October 1, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 10/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/54:26 pm -
1 stop14h 51m
Sat 11/79:52 pm -
1 stop26h 24m
Deal found 10/1![Frontier logo]()
$196
This Southwest deal was found by Cheapflights users on 10/1. 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.
Fri 10/305:40 pm -
Nonstop2h 00m
Mon 11/26:00 pm -
1 stop4h 00m
Deal found 10/1![Southwest logo]()
$326
This Southwest deal was found by Cheapflights users on 10/1. 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 11/145:45 am -
1 stop3h 40m
Sun 11/156:00 pm -
1 stop4h 00m
Deal found 10/1![Southwest logo]()
$346
This Southwest deal was found by Cheapflights users on 9/29. 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.
Thu 10/295:40 pm -
Nonstop2h 00m
Thu 11/51:20 pm -
Nonstop2h 20m
Deal found 9/29![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 10/1. 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.
Thu 10/296:45 am -
Nonstop2h 00m
Mon 11/210:45 pm -
Nonstop2h 20m
Deal found 10/1![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 9/27. 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.
Fri 10/239:00 pm -
Nonstop1h 55m
Mon 10/267:05 pm -
1 stop5h 35m
Deal found 9/27![Southwest logo]()
$370
This Southwest deal was found by Cheapflights users on 10/1. 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.
Tue 12/16:35 am -
Nonstop1h 55m
Fri 12/48:50 pm -
Nonstop2h 20m
Deal found 10/1![Southwest logo]()
$371
Last-minute flights from St. Louis to BaltimoreDiscover last-minute flight deals from St. Louis to Baltimore. Data last updated October 1, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Baltimore. Data last updated October 1, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 9/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:35 pm -
1 stop4h 59m
Sat 10/243:15 pm -
1 stop8h 58m
Deal found 9/29![Frontier logo]()
$134
This CheapOair deal was found by Cheapflights users on 10/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:35 pm -
1 stop4h 59m
Wed 10/2810:45 am -
1 stop7h 55m
Deal found 10/1![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 9/30. 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.
Fri 10/236:35 pm -
1 stop4h 59m
Mon 10/269:52 pm -
2 stops44h 48m
Deal found 9/30![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 10/266:35 pm -
1 stop14h 15m
Wed 11/1110:45 am -
1 stop7h 55m
Deal found 9/30![Frontier logo]()
$106
This Cheapflightsfares deal was found by Cheapflights users on 9/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:35 pm -
1 stop4h 59m
Wed 10/2810:45 am -
1 stop7h 55m
Deal found 9/27![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 10/266:35 pm -
1 stop14h 15m
Thu 10/299:12 pm -
1 stop21h 28m
Deal found 9/30![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 10/286:44 pm -
1 stop4h 49m
Tue 11/109:12 pm -
1 stop21h 28m
Deal found 9/30![Frontier logo]()
$105
This Mytrip deal was found by Cheapflights users on 9/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:44 pm -
1 stop4h 49m
Wed 11/45:40 am -
1 stop13h 00m
Deal found 9/30![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 9/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:44 pm -
1 stop4h 49m
Mon 11/210:16 am -
1 stop8h 24m
Deal found 9/30![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 9/29. 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.
Wed 11/116:44 pm -
1 stop4h 49m
Fri 11/136:24 am -
1 stop12h 16m
Deal found 9/29![Frontier logo]()
$139
This Frontier deal was found by Cheapflights users on 10/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:44 pm -
1 stop4h 49m
Mon 11/1610:16 am -
1 stop8h 24m
Deal found 10/1![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 October 1, 2026.
Search for one-way flight options from St. Louis to Baltimore. Find affordable one-way fares based on user searches. Data last updated October 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 10/286:44 pm -
1 stop4h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$48
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 10/266:35 pm -
1 stop14h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$49
This Cheapflightsfares deal was found by Cheapflights users on 9/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:35 pm -
1 stop4h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 10/1. 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 12/212:02 pm -
1 stop4h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$61
This Frontier deal was found by Cheapflights users on 9/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:44 pm -
1 stop4h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 11/306:35 pm -
1 stop22h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$72
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 October 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $105 (Kiwi.com) |
One-way from | $48 (Kiwi.com) |
Popular in | February |
Cheapest in | April |
Average price | $473 |
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 7,457,451 searches. Data last updated October 1, 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 Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Fri 10/30
7:59 pm-12:22 am
2 stops27h 23m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$124
St. LouisBaltimore
STL Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Thu 11/26
12:29 pm-7:49 pm
1 stop6h 20m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$138
St. LouisBaltimore
STL Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Sat 12/5
10:35 am-5:00 pm
1 stop5h 25m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$138
St. LouisBaltimore
STL Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Sat 10/31
12:00 pm-8:19 pm
1 stop7h 19m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$138
St. LouisBaltimore
STL Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Tue 12/8
2:33 pm-8:54 pm
1 stop5h 21m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$138
St. LouisBaltimore
STL Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Tue 12/29
7:15 pm-12:49 am
1 stop4h 34m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$138
Quickest round-trip
St. LouisBaltimore
STL Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Sat 12/12
4:38 pm-9:50 pm
1 stop4h 12m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$138
St. LouisBaltimore
STL Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Thu 12/24
6:30 am-11:22 pm
1 stop15h 52m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$156
St. LouisBaltimore
STL Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Thu 10/29
6:21 am-11:23 pm
1 stop16h 02m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$156
St. LouisBaltimore
STL Lambert-St Louis - BWI Baltimore/Washington
STLBWI
Lambert-St Louis
Sat 10/24
6:21 am-11:23 pm
1 stop16h 02m
Baltimore/Washington
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$156
Showing 1-10 of 18 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 October.
| 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
Prices
More
How far ahead should I book a flight from St. Louis to Baltimore?
Booking 45 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, April is the cheapest month in which you can book a flight from St. Louis to Baltimore (average of $370). 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 October 1, 2026.
It’s typically best to fly out from St. Louis to Baltimore at noon. Doing so could potentially save you 14% 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 September 26, 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. Saturday evenings 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 October 1, 2026.
Peruse reviews from past customers who have flown with Southwest,American Airlines, andFrontier 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.
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Related info for your journey
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Top 3 airlines flying from St. Louis to Baltimore
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$147 | Average$269 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$282 | Average$430 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$314 | Average$451 | FlexibilityNo cancel fee | On-time63% |