Alaska Airlines Flights from Seattle to Washington, D.C.
Lowest fares from Seattle to Washington, D.C.
One-way low-fare flights Seattle to Washington, D.C..*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Jan 31, 2026 | From $109 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Feb 6, 2026 | From $109 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Feb 25, 2026 | From $109 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Mar 4, 2026 | From $109 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Mar 17, 2026 | From $109 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Jan 28, 2026 | From $109 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Feb 5, 2026 | From $109 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Feb 7, 2026 | From $109 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Jan 20, 2026 | From $120 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Feb 10, 2026 | From $120 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Jan 22, 2026 | From $120 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Jan 30, 2026 | From $120 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Feb 19, 2026 | From $120 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Jan 27, 2026 | From $120 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Jan 28, 2026 | From $120 Seen: 6 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Feb 25, 2026 | From $120 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.