$245 Cheap United flights St. Louis (STL) to Washington (DCA)

View $245 flight on Tue, Dec 30, 2025Opens in a new window

$245 Cheap United flights St. Louis (STL) to Washington (DCA)

Prices were available within the past 7 days and start at $245 for one-way flights and $392 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Dec 30 - Wed, Dec 31
STL
St. Louis
DCA
Washington
$392 Roundtrip, found 1 day ago
$392
Roundtrip
found 1 day ago
Select United flight, departing Tue, Dec 30 from St. Louis to Washington, returning Wed, Dec 31, priced at $392 found 1 day ago
United
Wed, Dec 31 - Mon, Jan 5
STL
St. Louis
DCA
Washington
$395 Roundtrip, found 17 hours ago
$395
Roundtrip
found 17 hours ago
Select United flight, departing Wed, Dec 31 from St. Louis to Washington, returning Mon, Jan 5, priced at $395 found 17 hours ago

Find the cheapest month to fly from St. Louis (STL) to Washington (DCA)

August is typically the cheapest month to fly

From $117 - $473 per traveler.

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Average driving time to city center is 40 minutes. Flights from $425
BWI
Baltimore Washington Intl. Thurgood Marshall
Average driving time to city center40 min
Flights from $425
Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city center is 36 minutes. Flights from $224
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city center36 min
Flights from $224
Flights from St. Louis (STL) to Washington (DCA)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Ronald Reagan Washington National
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Popular airline
American Airlines
Distance
1147 km
Average flight time
3 hours 3 mins