$335 Cheap flight deals from Seattle (SEA) to Porto (OPO)

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This Weekend's Flight Deals from Seattle to Porto

This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Sep 20 - Sun, Sep 27
SEA
Seattle - Tacoma Intl.
OPO
Dr. Francisco de Sa Carneiro
$1,052 Roundtrip, found 9 hours ago
$1,052
Roundtrip
found 9 hours ago
Select Lufthansa flight, departing Sun, Sep 20 from Seattle - Tacoma Intl. to Dr. Francisco de Sa Carneiro, returning Sun, Sep 27, priced at $1,052 found 9 hours ago

Airfares from $335 One Way, $609 Round Trip from Seattle to Porto

Prices starting at $609 for return flights and $335 for one-way flights to Porto were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Nov 15 - Tue, Nov 24
SEA
Seattle
OPO
Porto
$609 Roundtrip, found 1 day ago
$609
Roundtrip
found 1 day ago
Select Iberia flight, departing Sun, Nov 15 from Seattle to Porto, returning Tue, Nov 24, priced at $609 found 1 day ago
Sun, Apr 18 - Wed, Apr 28
SEA
Seattle
OPO
Porto
$610 Roundtrip, found 14 hours ago
$610
Roundtrip
found 14 hours ago
Select British Airways flight, departing Sun, Apr 18 from Seattle to Porto, returning Wed, Apr 28, priced at $610 found 14 hours ago
Tue, Oct 6 - Wed, Oct 21
SEA
Seattle
OPO
Porto
$661 Roundtrip, found 5 days ago
$661
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Tue, Oct 6 from Seattle to Porto, returning Wed, Oct 21, priced at $661 found 5 days ago
Tue, Oct 13 - Thu, Oct 22
SEA
Seattle
OPO
Porto
$726 Roundtrip, found 5 days ago
$726
Roundtrip
found 5 days ago
Select Air Canada flight, departing Tue, Oct 13 from Seattle to Porto, returning Thu, Oct 22, priced at $726 found 5 days ago
Mon, Oct 5 - Thu, Oct 15
SEA
Seattle
OPO
Porto
$729 Roundtrip, found 5 days ago
$729
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Oct 5 from Seattle to Porto, returning Thu, Oct 15, priced at $729 found 5 days ago

Porto economy flight packages

Price found within the past 48 hours. Click for updated prices.
Hotel Moon & Sun Braga
4.0-star property

Hotel Moon & Sun Braga

9.4/10 Exceptional! (330 reviews)

Oct 17 - Oct 18

1 night stay

Seattle (SEA) to Porto (OPO)

Delta • Coach

Porto (OPO) to Seattle (SEA)

Air France • Coach
Price was $1,339, price is now $1,282 per person
$1,282
per person
found 1 day ago

Eurostars Porto Douro
4.0-star property

Eurostars Porto Douro

9.4/10 Exceptional! (1,005 reviews)

Oct 17 - Oct 18

1 night stay

Seattle (SEA) to Porto (OPO)

Delta • Coach

Porto (OPO) to Seattle (SEA)

Air France • Coach
Price was $1,530, price is now $1,363 per person
$1,363
per person
found 1 day ago

Torel Royal Court
5.0-star property

Torel Royal Court

10/10 Exceptional! (83 reviews)

Oct 17 - Oct 18

1 night stay

Seattle (SEA) to Porto (OPO)

Delta • Coach

Porto (OPO) to Seattle (SEA)

Air France • Coach
Price was $1,391, price is now $1,335 per person
$1,335
per person
found 1 day ago
Really special hotel in a great location of Guimaraes. The staff is incredibly warm and friendly, and cater to whatever you need. Breakfast was great. For Europe, these rooms are huge, and charmingly decorated. Pool and patio were great. We will definitely stay here again.

Reviewed on Jul 20, 2026

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More About Flying To Porto from Seattle

Route Information for Flights from Seattle to Porto

Origin Airport IATA Code
SEA
Destination Airport IATA Code
OPO
Distance
Direct Flight Airlines
Earliest Flight Arrival
Latest Flight Arrival

Seattle to Porto

Whether you want to book cheap flights from Seattle to Porto or are looking for the perfect package holiday, Orbitz is your one-stop source. Taking the stress and expense out of travel, Orbitz helps you find the best fares for Seattle to Porto flights.

Make the Most of Your Vacation

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Book your flights from Seattle to Porto wherever you are with the Orbitz app for Android and iPhone. Or simply use m.orbitz.com on your mobile browser to search and book the Seattle to Porto flights that you want. And if you’re running late, you check your flight status and baggage claim information on your mobile device too too.

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Frequently asked questions

What is the shortest flight from Seattle to Porto?
It's a long way from Seattle - Tacoma Intl. Airport (SEA) to Dr. Francisco de Sa Carneiro Airport (OPO) — 11 hours and 40 minutes at least. But your time in your seat doesn't need to be a strain. Be prepared and come with the basics like your toothbrush and a pillow.
What is the cheapest day of the week to fly?
Consider flying out early in the week to save on your airfare. Orbitz data from 2021 shows that Monday is the cheapest day to depart, followed by Tuesday. Saturday showed the highest average ticket prices likely because many travelers prefer to start their vacation on a weekend.
What is the cheapest month to fly?
We won't keep you guessing, according to Orbitz data from 2021, the cheapest month to fly is February. Perfect for those who need a weekend getaway, or just a break from it all in the shortest month of the year. Be aware that the most expensive time to fly is during the height of summer in July, and in the holiday month of December.*According to flight demand on Orbitz.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

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Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.