Seattle / Tacoma (SEA) to Washington (IAD) flight deal in economy from $255

Wednesday, December 30th, 2026

7 round-trip options

Returning
Mon, Jan 4, 20275 Day Trip
$457 USD
Returning
Wed, Jan 6, 20277 Day Trip
$447 USD
Returning
Sat, Jan 9, 202710 Day Trip
$447 USD
Returning
Sun, Jan 10, 202711 Day Trip
$447 USD
Returning
Mon, Jan 11, 202712 Day Trip
$447 USD
Returning
Tue, Jan 12, 202713 Day Trip
$447 USD
Returning
Wed, Jan 13, 202714 Day Trip
$447 USD