Cheap Flights from IAD to SEA
The Cheapest Round-trip Tickets from to Seattle
| Departure at | Return at | Stops | Airline | Find tickets |
|---|---|---|---|---|
| 27 August 2026 | 30 August 2026 | Direct |  | RT from 332 |
The Cheapest Flights for this Month from to Seattle
| Departure at | Return at | Stops | Airline | Find tickets |
|---|---|---|---|---|
| 24 May 2026 | 26 May 2026 | 3 Stops |  | RT from 1 125 |
| 25 May 2026 | 28 May 2026 | 1 Stop | | RT from 545 |
| 4 June 2026 | 8 June 2026 | 1 Stop | | RT from 378 |
| 13 June 2026 | 20 June 2026 | 1 Stop | | RT from 542 |
| 19 July 2026 | 24 July 2026 | 1 Stop | | RT from 419 |
| 27 August 2026 | 30 August 2026 | 1 Stop | | RT from 332 |
| 20 October 2026 | 22 October 2026 | Direct | | RT from 443 |
The Cheapest Flights from to Seattle for the Year Ahead
| Departure at | Return at | Stops | Airline | Find tickets |
|---|---|---|---|---|
| 25 May 2026 | 28 May 2026 | 1 Stop | | RT from 545 |
| 4 June 2026 | 8 June 2026 | 1 Stop | | RT from 378 |
| 19 July 2026 | 24 July 2026 | 1 Stop | | RT from 419 |
| 27 August 2026 | 30 August 2026 | 1 Stop | | RT from 332 |
| 20 October 2026 | 22 October 2026 | Direct | | RT from 443 |