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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Cheap Washington DC airfares from $549/RT are provided by Cheapoair.com. Outbound flight is leaving on 04/03/2025, 04:57 pm from St. Louis Intl (STL) airport and arrives at Washington Dulles (IAD) at 09:41 am. The flight time is 16 hours and 44 minutes. The Returning flight departes on 04/14/2025, 09:30 pm (other return dates are also available). Date posted: 05 Feb 2025
Price evolution for flights From Saint Louis To Washington DC
Recent Deals on Flights from Saint Louis to Washington DC:Roundtrip / Oneway
- $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 - $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 - $86 Frontier Airlines
cheapoair.com check priceFrom To Departure Time Saint Louis, MO (STL) Washington DC, DC (IAD) 04/03/2025 04:57 pm
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