$104 Cheap Delta flights St. Louis (STL) to Baltimore (BWI)

View $104 flight on Wed, Aug 13, 2025Opens in a new window

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$104 Cheap Delta flights St. Louis (STL) to Baltimore (BWI)

Prices were available within the past 7 days and start at $104 for one-way flights and $174 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Oct 21 - Sun, Oct 26
STL
St. Louis
BWI
Baltimore
$174 Roundtrip, found 2 hours ago
$174
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Oct 21 from St. Louis to Baltimore, returning Sun, Oct 26, priced at $174 found 2 hours ago
Delta
Thu, Aug 21 - Mon, Aug 25
STL
St. Louis
BWI
Baltimore
$184 Roundtrip, found 2 days ago
$184
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Aug 21 from St. Louis to Baltimore, returning Mon, Aug 25, priced at $184 found 2 days ago
Delta
Thu, Oct 2 - Wed, Oct 8
STL
St. Louis
BWI
Baltimore
$193 Roundtrip, found 5 hours ago
$193
Roundtrip
found 5 hours ago
Select Delta flight, departing Thu, Oct 2 from St. Louis to Baltimore, returning Wed, Oct 8, priced at $193 found 5 hours ago
Delta
Thu, Nov 6 - Sun, Nov 9
STL
St. Louis
BWI
Baltimore
$197 Roundtrip, found 3 days ago
$197
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Nov 6 from St. Louis to Baltimore, returning Sun, Nov 9, priced at $197 found 3 days ago
Delta
Wed, Sep 3 - Tue, Sep 16
STL
St. Louis
BWI
Baltimore
$207 Roundtrip, found 3 hours ago
$207
Roundtrip
found 3 hours ago
Select Delta flight, departing Wed, Sep 3 from St. Louis to Baltimore, returning Tue, Sep 16, priced at $207 found 3 hours ago
Flights from St. Louis (STL) to Baltimore (BWI)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Baltimore Washington Intl. Thurgood Marshall
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, United
Popular airline
American Airlines
Distance
735 mi
Average flight time
3 hours 33 mins

Frequently asked questions

How much is a Delta Air Lines flight from Lambert-St. Louis Intl. Airport (STL) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Scoring cheap one-way Delta Air Lines flights from STL to BWI from $104 on Expedia is simple --- just filter by "Price (lowest to highest)." Or check out our budget-friendly round-trip fares from $174 for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to BWI with Delta Air Lines?
Search for one-way or return flights to Baltimore in January or February. You could find cheaper fares with Delta Air Lines during these off-peak travel months.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) with Delta Air Lines?
Look for affordable Delta Air Lines flights from Lambert-St. Louis Intl. Airport (STL) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) one to three months prior to your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the best day to book a domestic flight is usually Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Delta Air Lines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
To figure out if there's a direct trip from STL to BWI with Delta Air Lines or other airlines, check the "Nonstop" box when browsing for tickets.
What is the earliest Delta Air Lines flight from STL to BWI?
Filter your results by "Morning" and "Early Morning" to see the earliest flights from STL to BWI. Setting off early means flight cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Delta Air Lines fly into in Baltimore?
Board a Delta Air Lines flight from Lambert-St. Louis Intl. Airport (STL) to Baltimore, and you're most likely to land at Baltimore Washington Intl. Thurgood Marshall Airport (BWI). This is the airline's main hub in this city.
Why fly with Delta Air Lines from STL to BWI?
Jetting off from STL to BWI with Delta Air Lines comes with a host of perks, including an excellent in-flight experience and a rewarding loyalty program. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That's in addition to the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Lambert-St. Louis Intl. Airport (STL) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Changes are typically free within 24 hours of making your booking, but your airline may add a charge after that. For more information about altering your flights, head to your "Trips," select your flight and click on "Manage Booking." If you want the flexibility to change your itinerary without extra charges, check the "Changes included" and "No cancel fee" filters when planning your trip.

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