Seattle > Washington > Northwest > Flight Schedules & Airfares from SEA to IAD on Northwest
Flight Schedules & Airfares from Seattle (SEA) to Washington (IAD) on Northwest
Northwest
Fare Compare has compiled a flight listing for all cities served by Northwest.
This page displays a weekly flight schedule of all flights, roundtrip fares and one-way fares for these flights
departing
from Seattle, Washington (SEA) to
Washington, District of Columbia (IAD).
Opposite
Direction Flight Schedules - Washington to Seattle
Roundtrip Fares
The following are roundtrip airfares listed from lowest to highest price from Seattle to Washington on Northwest. The roundtrip fare class code is listed along with the advance purchase in days, first/last travel time window (no restriction if blank), maximum stay, and a notation of whether or not certain time periods are ineligible (blackouts).
One-Way Fares
The following are one-way airfares from lowest to highest price on Northwest departing from Seattle arriving at Washington. The one-way fare class code is listed along with the advance purchase in days, first/last departure time period (if any), and a notation of whether or not certain time periods are blacked out.
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