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. (IAD) | One-way | Saver | Depart: Apr 23, 2026 | From $100 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: May 1, 2026 | From $100 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: May 2, 2026 | From $100 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Apr 14, 2026 | From $100 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Apr 28, 2026 | From $100 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: Apr 30, 2026 | From $100 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: May 5, 2026 | From $100 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (IAD) | One-way | Saver | Depart: May 6, 2026 | From $100 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: May 6, 2026 | From $110 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: May 8, 2026 | From $110 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: May 9, 2026 | From $110 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: May 20, 2026 | From $110 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Apr 28, 2026 | From $110 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: Apr 29, 2026 | From $110 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: May 5, 2026 | From $110 Seen: 12 hours ago | |
| Seattle (SEA) | Washington, D.C. (DCA) | One-way | Saver | Depart: May 19, 2026 | From $110 Seen: 8 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.