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Cheap flights from St Louis (STL) to Washington (DCA)

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1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from St Louis (STL) to Washington (DCA)

How to find the cheapest flight from St Louis (STL) to Washington (DCA)
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How to find the cheapest flight from St Louis (STL) to Washington (DCA)
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How to find the cheapest flight from St Louis (STL) to Washington (DCA)
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Cheap flights from St Louis to Washington in August , September 2026

18 Aug - 07 Sep $ 441.00
STL
St Louis
United Airlines
1 STOPS
DCA
Washington
DCA
Washington
United Airlines
1 STOPS
STL
St Louis
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22 Aug - 05 Sep $ 1,354.00
STL
St Louis
Alaska Airlines
1 STOPS
DCA
Washington
DCA
Washington
Alaska Airlines
1 STOPS
STL
St Louis
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22 Aug - 09 Sep $ 7,510.00
STL
St Louis
Alaska Airlines
1 STOPS
DCA
Washington
DCA
Washington
Alaska Airlines
1 STOPS
STL
St Louis
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Last minute flights from St Louis to Washington

28 Aug - 31 Aug $ 600.00
STL
St Louis
United Airlines
1 STOPS
DCA
Washington
DCA
Washington
United Airlines
1 STOPS
STL
St Louis
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24 Aug - 31 Aug $ 600.00
STL
St Louis
United Airlines
1 STOPS
DCA
Washington
DCA
Washington
United Airlines
1 STOPS
STL
St Louis
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22 Aug - 31 Aug $ 7,573.00
STL
St Louis
Alaska Airlines
1 STOPS
DCA
Washington
DCA
Washington
Alaska Airlines
1 STOPS
STL
St Louis
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One-way flights to Washington from St Louis

5:30 PM - 7:45 PM
United Airlines
1 Stops
4h 22m
STL - DCA
$ 283
Kiwi
Pick dates
5:30 PM - 7:45 PM
United Airlines
1 Stops
4h 22m
STL - DCA
$ 283
Kiwi
Pick dates
5:30 PM - 7:45 PM
United Airlines
1 Stops
4h 22m
STL - DCA
$ 283
Kiwi
Pick dates

How to find the cheapest flight from St Louis (STL) to Washington (DCA)

Related info for your journey
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How to find the cheapest flight from St Louis (STL) to Washington (DCA)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Washington (DCA)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.