Alaska Airlines Flights from Washington, D.C. to Seattle
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1 Passenger
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Lowest fares from Washington, D.C. to Seattle
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One-way low-fare flights Washington, D.C. to Seattle.*
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From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Aug 18, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Aug 22, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Aug 26, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 15, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 16, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 19, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 23, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (IAD) | Seattle (SEA) | One-way | Saver | Depart: Sep 29, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 6, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 7, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Aug 31, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 1, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 8, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 9, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 12, 2026 | From $148 Seen: 14 hours ago | |
| Washington, D.C. (DCA) | Seattle (SEA) | One-way | Saver | Depart: Sep 22, 2026 | From $148 Seen: 14 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.