$333 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, Oct 18 - Sun, Oct 25
SEA
Seattle - Tacoma Intl.
OPO
Dr. Francisco de Sa Carneiro
$1,004 Roundtrip, found 4 days ago
$1,004
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sun, Oct 18 from Seattle - Tacoma Intl. to Dr. Francisco de Sa Carneiro, returning Sun, Oct 25, priced at $1,004 found 4 days ago

Airfares from $333 One Way, $714 Round Trip from Seattle to Porto

Prices starting at $714 for return flights and $333 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.

Wed, Apr 14 - Fri, Apr 23
SEA
Seattle
OPO
Porto
$714 Roundtrip, found 1 day ago
$714
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Wed, Apr 14 from Seattle to Porto, returning Fri, Apr 23, priced at $714 found 1 day ago
Wed, Apr 14 - Wed, Apr 28
SEA
Seattle
OPO
Porto
$727 Roundtrip, found 4 days ago
$727
Roundtrip
found 4 days ago
Select Swiss International Air Lines flight, departing Wed, Apr 14 from Seattle to Porto, returning Wed, Apr 28, priced at $727 found 4 days ago
Mon, Mar 8 - Wed, Mar 17
SEA
Seattle
OPO
Porto
$731 Roundtrip, found 3 days ago
$731
Roundtrip
found 3 days ago
Select British Airways flight, departing Mon, Mar 8 from Seattle to Porto, returning Wed, Mar 17, priced at $731 found 3 days ago
Mon, Mar 1 - Thu, Mar 11
SEA
Seattle
OPO
Porto
$733 Roundtrip, found 2 days ago
$733
Roundtrip
found 2 days ago
Select Air Canada flight, departing Mon, Mar 1 from Seattle to Porto, returning Thu, Mar 11, priced at $733 found 2 days ago
Wed, Jan 13 - Wed, Jan 20
SEA
Seattle
OPO
Porto
$736 Roundtrip, found 1 day ago
$736
Roundtrip
found 1 day ago
Select Iberia flight, departing Wed, Jan 13 from Seattle to Porto, returning Wed, Jan 20, priced at $736 found 1 day ago

Porto economy flight packages

Price found within the past 48 hours. Click for updated prices.
Eurostars Porto Douro
4.0-star property

Eurostars Porto Douro

9.4/10 Exceptional! (1,006 reviews)

Nov 24 - Nov 27

3 night stay

Seattle (SEA) to Porto (OPO)

Iberia • Roundtrip • Coach
Price was $1,512, price is now $1,382 per person
$1,382
per person
found 14 hours ago
I was double charged at the property and they refused to refund the second charge, 600 euro. (Yes, I mistakenly booked twice, but alerted Eurostars as soon as I knew.) The hotel was full, so they could not have honored my duplicate reservation. Do I need my 600 euro, yes! Does a giant company like Eurostars need my 600 euros? Not really! Book away to a company that will treat you fairly.

Reviewed on Oct 13, 2026

GA Palace Hotel
5.0-star property

GA Palace Hotel

10/10 Exceptional! (1,006 reviews)

Nov 24 - Nov 27

3 night stay

Seattle (SEA) to Porto (OPO)

Iberia • Roundtrip • Coach
Price was $1,867, price is now $1,560 per person
$1,560
per person
found 14 hours ago

LENSCAPE Coterie
5.0-star property

LENSCAPE Coterie

10/10 Exceptional! (26 reviews)

Nov 24 - Nov 27

3 night stay

Seattle (SEA) to Porto (OPO)

Iberia • Roundtrip • Coach
Price was $1,786, price is now $1,562 per person
$1,562
per person
found 14 hours ago
Wonderful stay at Lenscape. As soon as you walk in you receive five star treatment. Stunning pool, jacuzzi, views, classy touches and great breakfast too. Staff couldn't do more for you, all excellent. Perfect for a couples break away from a toddler and pregnant in the third trimester! It's tranquillity in the heart of the city.

Reviewed on Oct 7, 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

Great Deals on Flights From Seattle to Porto

Spend more of your time and money at Porto instead of sitting at your computer, searching for discount Seattle to Porto flights. This is why Orbitz makes it easy for you to check out destinations, plan your trip, and book your air fare, hotel, car rental, and more in just one place. Our low price guarantee means that you get great deals on flights from Seattle to Porto.

Flights That Fit Your Budget

Traveling on a budget? Not to worry if you are using Orbitz. We monitor thousands of fares to make sure we show you the best air ticket prices available for your travel dates. Besides amazing prices on Seattle to Porto flights, we offer you great deals on hotels, vacation packages, and last-minute getaways for the perfect trip.

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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.