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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From $322 / RT details

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

Price overview for flights from Saint Louis to Washington DC

Recent Deals on Flights from Saint Louis to Washington DC:Roundtrip / Oneway

  • $322Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Saint Louis, MO (STL)Washington DC, DC (IAD)03/08/202505:24 pm
    Washington DC, DC (IAD)Saint Louis, MO (STL)03/15/202505:54 pm
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  • $333Multiple Airlines flight Multiple Airlines 
    FromToDepartureTime
    Saint Louis, MO (STL)Washington DC, DC (IAD)04/02/202504:57 pm
    Washington DC, DC (IAD)Saint Louis, MO (STL)04/10/202506:30 am
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  • $549Multiple Airlines flight Multiple Airlines 
    FromToDepartureTime
    Saint Louis, MO (STL)Washington DC, DC (IAD)04/03/202504:57 pm
    Washington DC, DC (IAD)Saint Louis, MO (STL)04/14/202509:30 pm
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  • $670Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Saint Louis, MO (STL)Washington DC, DC (IAD)04/02/202504:57 pm
    Washington DC, DC (IAD)Saint Louis, MO (STL)04/10/202505:52 pm
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  • $950Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Saint Louis, MO (STL)Washington DC, DC (IAD)04/03/202504:57 pm
    Washington DC, DC (IAD)Saint Louis, MO (STL)04/14/202505:52 pm
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  • $96Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Saint Louis, MO (STL)Washington DC, DC (DCA)02/28/202507:09 pm
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  • $316Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Saint Louis, MO (STL)Washington DC, DC (IAD)03/09/202505:24 pm
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  • $480Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Saint Louis, MO (STL)Washington DC, DC (IAD)03/23/202508:58 am
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