$149 Cheap American Airlines flights St. Louis (STL) to Washington (IAD)

View $149 flight on Mon, Aug 4, 2025Opens in a new window

$149 Cheap American Airlines flights St. Louis (STL) to Washington (IAD)

Prices were available within the past 7 days and start at $149 for one-way flights and $247 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
American Airlines
Mon, Aug 4 - Tue, Aug 12
STL
St. Louis
IAD
Washington
$247
Roundtrip
Found 3 days ago
Select American Airlines flight, departing Mon, Aug 4 from St. Louis to Washington, returning Tue, Aug 12, priced at $247 Found 3 days ago
American Airlines
Mon, Aug 4 - Tue, Aug 12
STL
St. Louis
IAD
Washington
$274
Roundtrip
Found 3 days ago
Select American Airlines flight, departing Mon, Aug 4 from St. Louis to Washington, returning Tue, Aug 12, priced at $274 Found 3 days ago
American Airlines
Mon, Aug 4 - Tue, Aug 12
STL
St. Louis
IAD
Washington
$282
Roundtrip
Found 3 days ago
Select American Airlines flight, departing Mon, Aug 4 from St. Louis to Washington, returning Tue, Aug 12, priced at $282 Found 3 days ago
American Airlines
Mon, Aug 4 - Tue, Aug 12
STL
St. Louis
IAD
Washington
$294
Roundtrip
Found 3 days ago
Select American Airlines flight, departing Mon, Aug 4 from St. Louis to Washington, returning Tue, Aug 12, priced at $294 Found 3 days ago
American Airlines
Mon, Aug 4 - Tue, Aug 12
STL
St. Louis
IAD
Washington
$302
Roundtrip
Found 3 days ago
Select American Airlines flight, departing Mon, Aug 4 from St. Louis to Washington, returning Tue, Aug 12, priced at $302 Found 3 days ago
American Airlines
Mon, Aug 4 - Tue, Aug 12
STL
St. Louis
IAD
Washington
$335
Roundtrip
Found 3 days ago
Select American Airlines flight, departing Mon, Aug 4 from St. Louis to Washington, returning Tue, Aug 12, priced at $335 Found 3 days ago
Flights from St. Louis (STL) to Washington (IAD)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Washington Dulles Intl.
Distance
1111 km
Average flight time
3 hours 8 mins