Flights from Seattle to Washington Dulles

SEAIAD

Seattle–Tacoma International Airport (Seattle, United States) → Washington Dulles International Airport (Dulles, United States)

Nonstop
3h 55m
Distance
3,702 km
Frequency
7×/week
One-way from
$206
Airlines
Alaska Airlines, Delta Air Lines, United Airlines
Book on Aviasales

Fares by month

One-way, per person

Lowest fares Aviasales travelers found in recent searches; some may include a connection. Prices change often — tap a month to see live fares.

Weekly schedule

Monday

  • AS73708:07→16:145h 7mAlaska Airlines
  • UA67208:09→16:084h 59mUnited Airlines
  • DL54111:58→20:065h 8mDelta Air Lines
  • AS36721:49→05:444h 55mAlaska Airlines

Tuesday

  • AS73708:07→16:145h 7mAlaska Airlines
  • UA67208:09→16:084h 59mUnited Airlines
  • DL54111:58→20:065h 8mDelta Air Lines
  • AS36721:49→05:444h 55mAlaska Airlines

Wednesday

  • AS73708:07→16:145h 7mAlaska Airlines
  • UA67208:09→16:084h 59mUnited Airlines
  • DL54111:58→20:065h 8mDelta Air Lines
  • AS36721:49→05:444h 55mAlaska Airlines

Thursday

  • AS73708:07→16:145h 7mAlaska Airlines
  • UA67208:09→16:084h 59mUnited Airlines
  • DL54111:58→20:065h 8mDelta Air Lines
  • AS36721:49→05:444h 55mAlaska Airlines

Friday

  • AS73708:07→16:145h 7mAlaska Airlines
  • UA67208:09→16:084h 59mUnited Airlines
  • DL54111:58→20:065h 8mDelta Air Lines
  • AS36721:49→05:444h 55mAlaska Airlines

Saturday

  • AS73708:07→16:145h 7mAlaska Airlines
  • UA67208:09→16:084h 59mUnited Airlines
  • DL54111:58→20:065h 8mDelta Air Lines
  • AS36721:49→05:444h 55mAlaska Airlines

Sunday

  • AS73708:07→16:146h 7mAlaska Airlines
  • UA67208:09→16:085h 59mUnited Airlines
  • DL54114:50→22:494h 59mDelta Air Lines
  • AS36721:49→05:443h 55mAlaska Airlines

Seattle to Washington Dulles — frequently asked

How long is the flight from Seattle to Washington Dulles?
SEA–IAD is 3h 55m nonstop, covering 3,702 km (2,300 mi).
Which airlines fly nonstop from Seattle to Washington Dulles?
Alaska Airlines, Delta Air Lines, United Airlines operate this route nonstop.
How much is a flight from Seattle to Washington Dulles?
One-way fares on SEA–IAD recently started from $206. The lowest recent fare is for travel in February 2027. Fares change daily, so check current prices before booking.
How often do flights run from Seattle to Washington Dulles?
The route is served 7 days a week (28 scheduled departures).