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SEA (Seattle) to OPO (Porto) Flights $1,063.26

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Cheap SEA to OPO Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from Seattle to Porto (SEA to OPO)

Question : Do prices fluctuate more for this route than others?
Answer : Ranging anywhere from $719 to $4,435, prices for SEA to OPO do fluctuate a lot more than most routes from the United States. Prices tend to be lower the further out you book.

Question : How many days should you spend in Porto?
Answer : Over the next two months, passengers from SEA to OPO are planning on staying for about two weeks on average.

Question : Who's offering the cheapest round-trip flight to Porto Airport (OPO) over the coming months?
Answer : Prices are hitting as high as $4,435 over the next three months when flying to OPO from SEA. Check out Delta Air Lines, as they have been booking customers at just $719.

Question : What is the cheapest day to fly in the next four weeks?
Answer : Jul 26th has seen bookings (as of Jul 24th) as cheap as $757. That comes in 56% below the average price for this route. Saving now means you'll have more money to spend on your trip.

Question : If your plans are flexible, have you considered changing your departure day?
Answer : In August, Wednesday is your lowest-cost day to fly. Flexibility is paramount when booking travel plans in order to keep travel costs down.