Other Options for This Route
Washington, D.C. (IAD) to Seattle (SEA) in May from $159
From $159
Washington, D.C. (IAD) to Seattle (SEA) in May from $407
From $407
Washington, D.C. (IAD) to Seattle (SEA) in June from $288
From $288
Best Flights starting from $197
from$197economy
Washington, D.C. (IAD)
Tue, Sep 15
Roundtrip
Seattle (SEA)
Wed, Sep 23
from$242economy
Washington, D.C. (IAD)
Fri, Sep 11
Roundtrip
Seattle (SEA)
Sat, Sep 19
from$245economy
Washington, D.C. (IAD)
Mon, Sep 14
Roundtrip
Seattle (SEA)
Tue, Sep 22
from$252economy
Washington, D.C. (IAD)
Wed, Sep 9
Roundtrip
Seattle (SEA)
Thu, Sep 17
from$255economy
Washington, D.C. (IAD)
Sun, Sep 13
Roundtrip
Seattle (SEA)
Mon, Sep 21
from$275economy
Washington, D.C. (IAD)
Thu, Sep 10
Roundtrip
Seattle (SEA)
Fri, Sep 18
from$318economy
Washington, D.C. (IAD)
Sat, Sep 12
Roundtrip
Seattle (SEA)
Sun, Sep 20
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Other Options for This Route
Other Destinations
Washington, D.C. (IAD) to Milwaukee (MKE) in September from $144
From $144
Washington, D.C. (IAD) to Miami (MIA) in September from $181
From $181
Washington, D.C. (IAD) to Guatemala City (GUA) in September from $207
From $207
Washington, D.C. (IAD) to San Salvador (SAL) in September from $236
From $236
Washington, D.C. (IAD) to Fresno (FAT) in September from $265
From $265
Washington, D.C. (IAD) to Calgary (YYC) in September from $326
From $326
Flights from Other Cities
Colorado Springs (COS) to Seattle (SEA) in September from $149
From $149
Los Angeles (LAX) to Seattle (SEA) in September from $154
From $154
Fort Myers (RSW) to Seattle (SEA) in September from $159
From $159
San Diego (SAN) to Seattle (SEA) in September from $183
From $183
Burbank (BUR) to Seattle (SEA) in September from $211
From $211
Washington, D.C. (BWI) to Seattle (SEA) in September from $219
From $219