Cheap flights from Saint Louis to Washington DC
Travel > North America > United States > Saint Louis to Washington DC flights
Check our current prices for flights from Saint Louis to Washington DC. Please note that we also give you historical search data for this city connection. These are all airfares that people found in the past, in order to find more current flight information from Saint Louis to Washington DC, you will need to run a search below.
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Book your flight now with Cheapoair.com and save!
Cheap Washington DC airfares from $322/RT are provided by Cheapoair.com. Outbound flight is leaving on 03/08/2025, 05:24 pm from St. Louis Intl (STL) airport and arrives at Washington Dulles (IAD) at 04:54 pm. The flight time is 22 hours and 30 minutes. The Returning flight departes on 03/15/2025, 05:54 pm (other return dates are also available). Date posted: 02 Feb 2025
Price evolution for flights From Saint Louis To Washington DC
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Recent Deals on Flights from Saint Louis to Washington DC:Roundtrip / Oneway
- $322
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Saint Louis, MO (STL) Washington DC, DC (IAD) 03/08/2025 05:24 pm Washington DC, DC (IAD) Saint Louis, MO (STL) 03/15/2025 05:54 pm - $333
Multiple Airlines
cheapoair.com check priceFrom To Departure Time Saint Louis, MO (STL) Washington DC, DC (IAD) 04/02/2025 04:57 pm Washington DC, DC (IAD) Saint Louis, MO (STL) 04/10/2025 06:30 am - $549
Multiple Airlines
cheapoair.com check priceFrom To Departure Time Saint Louis, MO (STL) Washington DC, DC (IAD) 04/03/2025 04:57 pm Washington DC, DC (IAD) Saint Louis, MO (STL) 04/14/2025 09:30 pm - $670
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Saint Louis, MO (STL) Washington DC, DC (IAD) 04/02/2025 04:57 pm Washington DC, DC (IAD) Saint Louis, MO (STL) 04/10/2025 05:52 pm - $950
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Saint Louis, MO (STL) Washington DC, DC (IAD) 04/03/2025 04:57 pm Washington DC, DC (IAD) Saint Louis, MO (STL) 04/14/2025 05:52 pm - $96
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Saint Louis, MO (STL) Washington DC, DC (DCA) 02/28/2025 07:09 pm - $316
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Saint Louis, MO (STL) Washington DC, DC (IAD) 03/09/2025 05:24 pm - $480
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Saint Louis, MO (STL) Washington DC, DC (IAD) 03/23/2025 08:58 am
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