Direct flights from Washington Dulles to Seattle
42 nonstop flights a week on 3 airlines. Zero layovers — one hop from IAD to SEA.
Flight time: about 5h8m nonstop
Which days does it fly?
When does it fly?
Departure times in Washington Dulles local time, from flights observed over the last 7 days.
| Flight | Departs | Duration | Days |
|---|---|---|---|
| Alaska ASA1574 | 7:10a | 5h11m | Mon, Wed, Fri, Sat, Sun |
| Alaska ASA1574 | 7:27a | 5h8m | Thu |
| Delta DAL1015 | 7:32a | 5h13m | Mon, Sun |
| Delta DAL1015 | 7:38a | 5h8m | Wed, Fri, Sat |
| Alaska ASA1574 | 7:41a | 4h59m | Tue |
| Delta DAL1015 | 8:12a | 5h13m | Thu |
| Delta DAL1015 | 9:08a | 5h9m | Tue |
| Alaska ASA375 | 9:12a | 5h10m | Wed, Sat |
| Alaska ASA375 | 9:20a | 5h19m | Mon, Tue, Thu, Fri, Sun |
| United UAL1824 | 1:11p | 4h49m | Fri |
| United UAL1824 | 1:19p | 5h | Mon, Wed, Thu, Sat, Sun |
| United UAL1824 | 1:35p | 5h8m | Tue |
| United UAL1128 | 6:02p | 5h6m | Tue–Fri |
| Alaska ASA737 | 6:14p | 5h33m | Thu |
| United UAL1128 | 6:18p | 4h58m | Mon, Sun |
| Alaska ASA737 | 6:20p | 5h25m | Wed |
| Alaska ASA737 | 6:30p | 5h17m | Tue, Fri, Sat |
| Alaska ASA737 | 6:42p | 5h | Mon, Sun |
| United UAL1128 | 7:20p | 5h5m | Sat |
Delta
UnitedThe route
One hop: IAD → SEADrag to pan · scroll with ⌘/Ctrl to zoom · arrow keys when focused
Nonstop from Washington Dulles (IAD) to Seattle (SEA)
Washington Dulles International Airport (IAD) has 42 nonstop flights a week to Seattle (SEA), operated by Alaska, Delta and United. No layovers, no connections — one hop out of IAD and you're there.
This route flies every day of the week, so any travel day works. Route data updated October 2026 from observed departures.
Route data updated October 2026 from observed flight departures. Schedules change — always confirm with the airline before booking.
How long is the flight from Washington Dulles to Seattle?
The nonstop flight from Washington Dulles (IAD) to Seattle (SEA) takes about 5h8m in the air, based on recently observed nonstop departures.