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

Friday, December 25th, 2026

7 round-trip options

Returning
Wed, Dec 30, 20265 Day Trip
$542 USD
Returning
Fri, Jan 1, 20277 Day Trip
$542 USD
Returning
Mon, Jan 4, 202710 Day Trip
$457 USD
Returning
Tue, Jan 5, 202711 Day Trip
$447 USD
Returning
Wed, Jan 6, 202712 Day Trip
$447 USD
Returning
Thu, Jan 7, 202713 Day Trip
$447 USD
Returning
Fri, Jan 8, 202714 Day Trip
$447 USD