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: Mar 11, 2026 | From $16 Seen: 2 minutes ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Jan 23, 2026 | From $120 Seen: 6 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Jan 24, 2026 | From $120 Seen: 6 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Jan 29, 2026 | From $120 Seen: 6 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Feb 9, 2026 | From $120 Seen: 6 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Feb 10, 2026 | From $120 Seen: 6 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Feb 19, 2026 | From $120 Seen: 6 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Feb 24, 2026 | From $120 Seen: 6 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Jun 30, 2026 | From $73 Seen: 17 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Jan 31, 2026 | From $93 Seen: 23 minutes ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Feb 11, 2026 | From $93 Seen: 45 minutes ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Jan 22, 2026 | From $109 Seen: 6 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Feb 5, 2026 | From $109 Seen: 6 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Feb 10, 2026 | From $109 Seen: 6 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Feb 7, 2026 | From $109 Seen: 6 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Feb 24, 2026 | From $109 Seen: 6 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.