Alaska Airlines Flights from Washington, D.C. to Seattle
Lowest fares from Washington, D.C. to Seattle
One-way low-fare flights Washington, D.C. to Seattle.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Jul 2, 2026 | From $16 Seen: 7 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Jun 14, 2026 | From $49 Seen: 1 hour ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Aug 26, 2026 | From $143 Seen: 10 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 15, 2026 | From $143 Seen: 10 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 16, 2026 | From $143 Seen: 10 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 19, 2026 | From $143 Seen: 10 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 22, 2026 | From $143 Seen: 10 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 23, 2026 | From $143 Seen: 10 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 1, 2026 | From $158 Seen: 10 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 9, 2026 | From $158 Seen: 10 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Aug 18, 2026 | From $158 Seen: 10 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 15, 2026 | From $158 Seen: 10 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 14, 2026 | From $168 Seen: 10 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Aug 31, 2026 | From $168 Seen: 10 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 8, 2026 | From $168 Seen: 10 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 12, 2026 | From $168 Seen: 10 hours ago |
*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.