$109 Cheap United flights St. Louis (STL) to Dallas (DFW)

View $109 flight on Tue, Jan 20, 2026Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

$109 Cheap United flights St. Louis (STL) to Dallas (DFW)

Prices were available within the past 7 days and start at $109 for one-way flights and $212 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Nov 18 - Wed, Nov 19
STL
St. Louis
DFW
Dallas
$212 Roundtrip, found 2 hours ago
$212
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Nov 18 from St. Louis to Dallas, returning Wed, Nov 19, priced at $212 found 2 hours ago
Flights from St. Louis (STL) to Dallas (DFW)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Dallas-Fort Worth Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Spirit Airlines, United
Popular airline
Frontier Airlines
Distance
550 mi
Average flight time
1 hour 52 mins

Frequently asked questions

How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Dallas-Fort Worth Intl. Airport (DFW)?
Landing cheap one-way United Airlines flights from STL to DFW from $109 on Expedia is simple — just filter by "Price (lowest to highest)." Or check out our affordable return fares from $212 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 DFW with United Airlines?
Look for return or one-way flights to Dallas in February or January. You could find lower fares with United Airlines during these off-peak times.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Dallas-Fort Worth Intl. Airport (DFW) with United Airlines?
Search for affordable United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Dallas-Fort Worth Intl. Airport (DFW) one to three months before your departure date. 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. Regardless of fare class and journey, the ideal day to book a domestic flight is generally Sunday and the most expensive day is typically 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 United Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Dallas-Fort Worth Intl. Airport (DFW)?
To figure out if there's a direct route from STL to DFW with United Airlines or any other airlines, use our "Nonstop" filter when browsing for tickets.
What is the earliest United Airlines flight from STL to DFW?
Filter your results by "Morning" and "Early Morning" to find the earliest departures from STL to DFW. Leaving early means you're less likely to experience cancellations.**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 United Airlines fly into in Dallas?
United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Dallas arrive at Dallas-Fort Worth Intl. Airport (DFW). This is the main entry point here.
Why fly with United Airlines from STL to DFW?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to fly from STL to DFW with United Airlines. Plus, when you sign up to Expedia's free One Key™ program, you can receive OneKeyCash™* in addition to United Airlines's loyalty program earnings. It's yours to use wherever your next trip takes you.*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 United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Dallas-Fort Worth Intl. Airport (DFW)?
Changes are generally free within 24 hours of making a booking, but your airline may charge a fee after that. For further details about modifying your flights, head to your "Trips," select your flight and click on "Manage Booking." If you'd like the flexibility to make changes without being charged, apply the "Changes included" and "No cancel fee" filters when planning your trip.

Explore a world of travel with Expedia

*Available to One Key members.