Porto (OPO) to Washington (IAD) flight deal in economy from $641

Good Availability
51% of dates checked are available within 10% of the lowest price

Thursday, January 21st, 2027

2 round-trip options

Returning
Fri, Jan 29, 20278 Day Trip
$641 USD
Returning
Wed, Feb 3, 202713 Day Trip
$641 USD