WashingtontoSeattleFlight Time
IAD–SEA · Nonstop
Washington (Washington Dulles International Airport) to Seattle (Seattle-Tacoma International Airport).
The estimated flight time from Washington (IAD) to Seattle (SEA) is about 5h 20m, covering 2,300 miles. Alaska Airlines, United Airlines, and Delta Air Lines fly the route nonstop with 6-7/day departures, from 06:00 to 19:28 local time.
Plan this routeAt a glance
| Est. flight time | Distance | Route type | Captured freq. | Market |
|---|---|---|---|---|
| ~5h 20m Estimated from great-circle distance — no tracked flights yet. | 2,300 mi | Nonstop | 6-7/day From the current provider sample; confirm live timetables before booking. | Domestic |
Airlines on this route
Nonstop airlines from Washington to Seattle
Alaska Airlines, United Airlines, and Delta Air Lines operate 6-7/day flights from IAD to SEA.
- First departure
- 06:00
- Last departure
- 19:28
- Cadence
- ~every 2 hours
- Scheduled departure times
- 10
| Airline | Captured daily freq. | Aircraft | Departures (local) |
|---|---|---|---|
| Alaska Airlines | 3/day | Boeing 737 · Seat map | 06:0006:03 |
Aircraft on this route
Flying the other way?
SEA to IAD flights — 6-7/day on 3 airlines →Methodology: airline, aircraft, terminal, and departure-time details come from a full week of published airline schedules for IAD, refreshed on a rolling basis. Frequency uses 46 scheduled departures across 7 observed days; flight time is estimated from flying distance until this route has enough tracked flights for an observed average.
Route FAQ
How long is the flight from Washington to Seattle?
The estimated flight time from Washington (IAD) to Seattle (SEA) is about 5h 20m, based on the 2,300-mile flying distance.
How far is Washington from Seattle?
Washington (IAD) to Seattle (SEA) is about 2,300 miles by air.
Are there nonstop flights from Washington to Seattle?
Yes. Alaska Airlines, United Airlines, and Delta Air Lines fly nonstop from Washington (IAD) to Seattle (SEA), with 6-7/day departures.
Which airlines fly from Washington to Seattle?
Alaska Airlines, United Airlines, and Delta Air Lines fly nonstop from Washington (IAD) to Seattle (SEA).
What aircraft fly from Washington to Seattle?
The IAD–SEA route is flown with Airbus A220, Boeing 737.
Route hubs
Nearby airport options
Near Washington
- DCA - WashingtonRonald Reagan Washington Ntl Airport · 24 mi from IADFlights from DCA
- BWI - BaltimoreBaltimore/Washington International Thurgood Marshall Airport · 45 mi from IADFlights from BWI
- RIC - RichmondRichmond International Airport · 100 mi from IADFlights from RIC