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 14, 2026 | From $120 Seen: 16 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Mar 18, 2026 | From $120 Seen: 16 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Mar 23, 2026 | From $120 Seen: 16 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Feb 18, 2026 | From $120 Seen: 16 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Feb 25, 2026 | From $120 Seen: 16 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Mar 1, 2026 | From $120 Seen: 16 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Mar 2, 2026 | From $120 Seen: 16 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Mar 9, 2026 | From $120 Seen: 16 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: May 12, 2026 | From $98 Seen: 4 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Feb 10, 2026 | From $110 Seen: 1 hour ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Feb 25, 2026 | From $110 Seen: 7 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Feb 14, 2026 | From $110 Seen: 1 hour ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Mar 3, 2026 | From $110 Seen: 16 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Mar 10, 2026 | From $110 Seen: 16 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Mar 18, 2026 | From $110 Seen: 16 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Mar 13, 2026 | From $115 Seen: 16 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.