$355 Cheap flight deals from Seattle (SEA) to Porto (OPO)

Earn rewards on top of your airline miles with Orbitz Rewards

Many airlines offer flexible change policies

Sign up to receive text alerts about your trip

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.

Sat, Aug 8 - Tue, Aug 18
SEA
Seattle - Tacoma Intl.
OPO
Dr. Francisco de Sa Carneiro
$1,241 Roundtrip, found 5 days ago
$1,241
Roundtrip
found 5 days ago
Select Turkish Airlines flight, departing Sat, Aug 8 from Seattle - Tacoma Intl. to Dr. Francisco de Sa Carneiro, returning Tue, Aug 18, priced at $1,241 found 5 days ago

Airfares from $355 One Way, $760 Round Trip from Seattle to Porto

Prices starting at $760 for return flights and $355 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.

Tue, Nov 3 - Fri, Nov 13
SEA
Seattle
OPO
Porto
$760 Roundtrip, found 11 hours ago
$760
Roundtrip
found 11 hours ago
Select British Airways flight, departing Tue, Nov 3 from Seattle to Porto, returning Fri, Nov 13, priced at $760 found 11 hours ago
Sun, Nov 15 - Tue, Nov 24
SEA
Seattle
OPO
Porto
$762 Roundtrip, found 3 days ago
$762
Roundtrip
found 3 days ago
Select Iberia flight, departing Sun, Nov 15 from Seattle to Porto, returning Tue, Nov 24, priced at $762 found 3 days ago
Tue, Dec 29 - Tue, Jan 12
SEA
Seattle
OPO
Porto
$806 Roundtrip, found 1 day ago
$806
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Dec 29 from Seattle to Porto, returning Tue, Jan 12, priced at $806 found 1 day ago
Mon, Nov 2 - Wed, Nov 11
SEA
Seattle
OPO
Porto
$813 Roundtrip, found 3 days ago
$813
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Nov 2 from Seattle to Porto, returning Wed, Nov 11, priced at $813 found 3 days ago
Wed, Apr 14 - Fri, Apr 23
SEA
Seattle
OPO
Porto
$822 Roundtrip, found 18 hours ago
$822
Roundtrip
found 18 hours ago
Select Swiss International Air Lines flight, departing Wed, Apr 14 from Seattle to Porto, returning Fri, Apr 23, priced at $822 found 18 hours ago

Porto economy flight packages

Price found within the past 48 hours. Click for updated prices.
YOUROPO - Downtown
3.0-star property

YOUROPO - Downtown

9.8/10 Exceptional! (178 reviews)

Sep 17 - Sep 23

6 night stay

Seattle (SEA) to Porto (OPO)

United • Non-stop • Coach

Porto (OPO) to Seattle (SEA)

Lufthansa • Non-stop • Coach
Price was $2,201, price is now $1,468 per person
$1,468
per person
found 1 day ago
Great location, great space great hotel. Would recommend and we would stay there again

Reviewed on Jul 30, 2026

LENSCAPE Coterie
5.0-star property

LENSCAPE Coterie

9.4/10 Exceptional! (16 reviews)

Sep 17 - Sep 23

6 night stay

Seattle (SEA) to Porto (OPO)

United • Non-stop • Coach

Porto (OPO) to Seattle (SEA)

Lufthansa • Non-stop • Coach
Save 100% on your flight
Price was $5,021, price is now $2,645 per person
$2,645
per person
found 1 day ago
Great location and fabulous breakfast

Reviewed on Jul 27, 2026

YOUROPO - Market
3.0-star property

YOUROPO - Market

9.8/10 Exceptional! (124 reviews)

Sep 17 - Sep 23

6 night stay

Seattle (SEA) to Porto (OPO)

United • Non-stop • Coach

Porto (OPO) to Seattle (SEA)

Lufthansa • Non-stop • Coach
Price was $2,363, price is now $1,536 per person
$1,536
per person
found 1 day ago
The property was great, steps up to the first floor could be a challenge for some.

Reviewed on Jul 25, 2026

Don't see what you're looking for?
See all available trips from Seattle to Porto
View all trips

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

For the best available deals on flights from Seattle to Porto, look no further than Orbitz. Offering the perfect packages with cutting-edge mobile tools, Orbitz is your ideal destination.

One Stop Travel Shop

Not only is Orbitz the best source for great deals on flights from Seattle to Porto, we offer the complete package. From guaranteed low prices on hotels, car rentals and activities, simply decide what you want and Orbitz will put together the complete vacation package.

Searching Anywhere

Booking Seattle to Porto flights is simple, wherever you are. Book on your computer and the Orbitz Display Matrix gives all your deals and discounts on flights from Seattle to Porto, showing your great savings. Or if you are on the move, use m.orbitz.com on your mobile browser to find exclusive Seattle to Porto flights for mobile users.

Worry-free Travel Planning

Orbitz is the best place for Seattle to Porto flights at guaranteed low prices, we also take the stress out of your flight details. With our free alerts service you can quickly find out your gate number or flight delays via email or text – perfect if you are in a rush.

Miles Better

If you frequently travel on flights from Seattle to Porto, it’s easy to rack up your air miles. Just add your frequent flyer number when booking your flights and we will do the rest. Orbitz will even store your number in your profile to automatically add on your miles each time you book.

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.

More Destinations

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.