Cheap flights from Seattle to Washington (SEA–IAD)
United States
United States
Alaska Airlines, Delta Air Lines and United Airlines fly Seattle to Washington (SEA–IAD) nonstop and back, a great-circle distance of 3,700 km (2,300 mi).
- From
- SEA
- Seattle
- To
- IAD
- Washington
- Nonstop
- Yes · 3 airlines
- Airlines
- AS · DL · UA
- Cheapest fare found
- $196 one-way
- Distance
- 3,700 km (2,300 mi)
- Time difference
- Washington 3 hours ahead
- Most flights
- Alaska Airlines
- Time in the air
- 4h 22m · 5h 07m back
- On time (Touchdown Index)
- 81.7%
- Flights a week
- AS ~15 · DL ~4 · UA ~10
- Aircraft seen
- Boeing 737 Max 9 · Boeing 737-900 · Airbus A220-300
Network data imported from airport and airline sources:· How we verify
Seattle to Washington fares by month
Cheapest one-way fare found: $196 for December 2026 on American Airlines (1 stop).
- Oct ’26$278
- Dec ’26$196
- Aug ’27$266
Cheapest one-way fares per month of departure in the Aviasales price cache, found . Fares change by the hour: the live fare is shown when you search.
When to fly SEA–IAD
For Seattle–Tacoma (SEA) to Washington Dulles (IAD), December 2026 had the lowest fare found ($196). Set your watch 3 hours forward on landing at IAD.
Seattle to Washington: frequently asked questions
Fares: Aviasales price cache, 8 October 2026; tracked flights between 6 September and 3 October 2026, from public ADS-B data.
How much is a flight from Seattle–Tacoma (SEA) to Washington Dulles (IAD)?
From $196 one-way, the cheapest fare found for December 2026 on American Airlines with 1 stop (found 8 October 2026).
How long is the SEA–IAD flight?
4h 22m wheels-up to wheels-down, the median of 118 tracked flights; IAD–SEA took 5h 07m.
Which airlines fly SEA–IAD direct?
Alaska Airlines, Delta Air Lines and United Airlines.
What is the cheapest month to fly SEA–IAD?
December 2026, at $196; the dearest month found was $278.
What is the time difference between Seattle and Washington?
Washington is 3 hours ahead of Seattle: a SEA departure at noon is 15:00 local time in IAD.
Is SEA–IAD usually on time?
81.7% of 219 SEA–IAD flights landed within 15 minutes of their usual time; 2.3% were over an hour late.
How many SEA–IAD flights a week?
Alaska Airlines 15, Delta Air Lines 4 and United Airlines 10 each way.
What aircraft fly SEA–IAD?
Boeing 737 Max 9, Boeing 737-900 and Airbus A220-300.
Washington to Seattle: the return flight (IAD–SEA)
All 3 airlines also fly IAD–SEA nonstop.
The return takes 5h 07m in the air (median of 113 tracked flights), 45 minutes longer than SEA–IAD.
Airlines flying SEA–IAD nonstop
| Airline | Usually takes off (SEA time) | Type | Alliance | Notes |
|---|---|---|---|---|
 Alaska Airlines AS | 08:59–22:21 | full-service | oneworld | — |
 Delta Air Lines DL | 00:04–18:34 | full-service | SkyTeam | — |
| United Airlines UA | 08:20–23:39 | full-service | Star Alliance | — |
One-stop alternatives to flying SEA–IAD nonstop
One airline on both legs; check it's sold as one ticket.
- Via Detroit (DTW) with Delta Air Lines: 3,710 km (2,300 mi) flown, almost no further than nonstop.
- Via Minneapolis (MSP) with Sun Country Airlines: 3,700 km (2,300 mi) flown, almost no further than nonstop.
- Via Chicago (ORD) with United Airlines: 3,710 km (2,300 mi) flown, almost no further than nonstop.
- Via Calgary (YYC) with
WestJet: 3,860 km (2,400 mi) flown, 4% further than nonstop. - Via Denver (DEN) with United Airlines: 3,980 km (2,470 mi) flown, 7% further than nonstop.
SEA–IAD route map
More from Seattle and Washington
Other arrivals in United States
Also nonstop from SEA, nearest to IAD first (straight-line distance):
- Washington (DCA) airport guide · 38 km (23 mi) from IAD
- Baltimore (BWI) airport guide · 73 km (45 mi) from IAD
- Philadelphia (PHL) airport guide · 216 km (134 mi) from IAD
- Pittsburgh (PIT) airport guide · 293 km (182 mi) from IAD
- Newark (EWR) airport guide · 341 km (212 mi) from IAD
Explore the airlines’ route maps
- Alaska Airlines route map and destinations
- Delta Air Lines route map and destinations
- United Airlines route map and destinations
Plan your arrival at Washington Dulles International Airport (IAD)
Also consider Ronald Reagan Washington National
Ronald Reagan Washington National Airport (DCA) also has nonstop flights from SEA: Alaska Airlines and Delta Air Lines.
Departure
Seattle–Tacoma International Airport
Seattle–Tacoma (SEA), Seattle. In our data, 38 airlines fly nonstop from SEA to 136 destinations.
View SEA airport guide →Arrival
Washington Dulles International Airport
2 ways into Washington, fastest from 35 min:
- Metrorail Silver Line 55 min–1h 05m · $2.25–6.75
- Washington Flyer taxi 35 min–1h
Other nonstop airport pairs, Seattle to Washington
Seattle and Washington are connected nonstop from more than one airport. Compare the pairs by airline count:
Onward from Washington
Places you can't fly to nonstop from SEA, but can from IAD — for a stopover or a second leg.
Related routes
Sources
- en.wikipedia.org — airlines and destinations, checked 2026-10-01
- en.wikipedia.org — airlines and destinations, checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
Flight tracking: adsb.lol community ADS-B data (CC0), 6 September – 3 October 2026. Times are median wheels-up to wheels-down; add taxiing for gate-to-gate.
Report a change — seen something different at the airport or on the airline's site? We re-check and log corrections publicly.