Flights from Washington, D.C. to Saint Louis from $ 295*
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1 Passenger, Economy
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Featured daily fares for flights from Washington, D.C. (IAD) to Saint Louis (STL)
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More United deals on Washington, D.C. (IAD) to Saint Louis (STL) flights
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From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| Washington, D.C. (IAD) | Saint Louis (STL) | Roundtrip | Economy | 04/18/26 - 04/25/26 | from $Â 295 Viewed: 22 hours ago |
| Washington, D.C. (IAD) | Saint Louis (STL) | Roundtrip | Economy | 04/22/26 - 04/27/26 | from $Â 315 Viewed: 23 hours ago |
| Washington, D.C. (IAD) | Saint Louis (STL) | Roundtrip | Economy | 04/21/26 - 04/27/26 | from $Â 325 Viewed: 23 hours ago |
| Washington, D.C. (IAD) | Saint Louis (STL) | Roundtrip | Economy | 05/07/26 - 05/10/26 | from $Â 368 Viewed: 22 hours ago |
| Washington, D.C. (IAD) | Saint Louis (STL) | Roundtrip | Economy | 04/23/26 - 04/26/26 | from $Â 390 Viewed: 20 hours ago |
| Washington, D.C. (IAD) | Saint Louis (STL) | Roundtrip | Economy | 05/06/26 - 05/09/26 | from $Â 295 Viewed: 1 hour ago |
| Washington, D.C. (IAD) | Saint Louis (STL) | Roundtrip | Economy | 09/10/26 - 09/14/26 | from $Â 335 Viewed: 6 hours ago |
| Washington, D.C. (IAD) | Saint Louis (STL) | Roundtrip | Economy | 09/11/26 - 09/14/26 | from $Â 346 Viewed: 6 hours ago |
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
