United flights from Seattle to Washington, D.C. from $ 277*
Featured daily fares for flights from Seattle (SEA) to Washington, D.C. (IAD)
More United deals on Seattle (SEA) to Washington, D.C. (IAD) flights
From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 04/22/25 - 05/01/25 | from $ 282* Viewed: 6 hours ago |
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 05/06/25 - 05/11/25 | from $ 376* Viewed: 3 hours ago |
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 04/22/25 - 05/01/25 | from $ 382* Viewed: 6 hours ago |
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 04/22/25 - 05/01/25 | from $ 472* Viewed: 6 hours ago |
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 05/06/25 - 05/11/25 | from $ 476* Viewed: 3 hours ago |
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 05/06/25 - 05/11/25 | from $ 571* Viewed: 3 hours ago |
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 07/26/25 - 08/02/25 | from $ 417* Viewed: 1 day ago |
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 07/26/25 - 08/02/25 | from $ 517* Viewed: 1 day ago |
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 05/08/25 - 05/12/25 | from $ 530* Viewed: 1 day ago |
| FromSeattle (SEA) | ToWashington, D.C. (IAD) | Roundtrip | Economy | 07/26/25 - 08/02/25 | from $ 617* Viewed: 1 day ago |
| FromSeattle (SEA) | ToWashington, D.C. (DCA) | Roundtrip | Economy | 09/15/25 - 09/19/25 | from $ 306* Viewed: 1 day ago |
| FromSeattle (SEA) | ToWashington, D.C. (DCA) | Roundtrip | Economy | 09/15/25 - 09/19/25 | from $ 386* Viewed: 1 day ago |
| FromSeattle (SEA) | ToWashington, D.C. (DCA) | Roundtrip | Economy | 09/15/25 - 09/19/25 | from $ 462* Viewed: 1 day ago |
| FromSeattle (SEA) | ToWashington, D.C. (DCA) | Roundtrip | Economy | 05/20/25 - 06/04/25 | from $ 337* Viewed: 59 minutes ago |
| FromSeattle (SEA) | ToWashington, D.C. (DCA) | Roundtrip | Economy | 05/20/25 - 06/04/25 | from $ 437* Viewed: 59 minutes ago |
| FromSeattle (SEA) | ToWashington, D.C. (DCA) | Roundtrip | Economy | 05/20/25 - 06/04/25 | from $ 532* Viewed: 59 minutes ago |
| FromSeattle (SEA) | ToWashington, D.C. (DCA) | Roundtrip | Economy | 05/20/25 - 06/04/25 | from $ 811* Viewed: 59 minutes ago |
| FromSeattle (SEA) | ToWashington, D.C. (DCA) | Roundtrip | Economy | 05/20/25 - 06/04/25 | from $ 906* Viewed: 59 minutes 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.
