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OPO - SEA

$489 Find cheap flights from Porto to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Porto to Seattle departing on 7/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Mon 6/17
Mon 6/24

Search hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to Seattle, as well as popular online travel agencies
In the last 7 days travelers have searched 42,332,103 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

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Filter your dealsChoose cabin class, free Wi-Fi and more.

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Cheap flight deals from Porto to Seattle (OPO-SEA)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
9:00 am - 11:28 amOPO-SEA
34h 28m2 stops
11:59 pm - 6:55 amSEA-OPO
22h 56m2 stops
$1,067United Airlines
Find Deal
Tue, May 28 - Wed, Jun 26
8:15 am - 11:59 pmOPO-SEA
23h 44m2 stops
8:30 am - 3:55 pmSEA-OPO
23h 25m2 stops
$1,072American Airlines
Find Deal
Tue, May 28 - Wed, Jun 26
9:55 pm - 8:35 pmOPO-SEA
30h 40m3 stops
1:50 pm - 6:10 pmSEA-OPO
20h 20m2 stops
$1,104
Find Deal
Tue, May 28 - Wed, Jun 26
9:55 pm - 8:35 pmOPO-SEA
30h 40m3 stops
1:50 pm - 6:10 pmSEA-OPO
20h 20m2 stops
$1,126
Find Deal
Tue, May 28 - Wed, Jun 26
4:30 pm - 1:15 pmOPO-SEA
28h 45m1 stop
5:20 pm - 10:45 pmSEA-OPO
21h 25m1 stop
$1,131
Find Deal
Tue, May 28 - Wed, Jun 26
9:15 am - 5:35 pmOPO-SEA
16h 20m1 stop
1:35 pm - 6:15 pmSEA-OPO
20h 40m1 stop
$1,144Air France
Find Deal
Wed, Jun 26 - Thu, Aug 1
10:45 am - 4:45 pmOPO-SEA
38h 00m1 stop
6:40 pm - 11:10 amSEA-OPO
32h 30m1 stop
$1,173Turkish Airlines
Find Deal
Fri, Jun 28 - Sat, Aug 3
4:20 pm - 11:20 amOPO-SEA
27h 00m1 stop
6:15 pm - 6:15 pmSEA-OPO
16h 00m1 stop
$1,180Delta
Find Deal
Mon, Jun 24 - Fri, Aug 2
4:20 pm - 11:20 amOPO-SEA
27h 00m1 stop
1:35 pm - 3:30 pmSEA-OPO
17h 55m1 stop
$1,181Delta
Find Deal
Mon, Jun 24 - Tue, Jul 30
11:15 am - 4:45 pmOPO-SEA
37h 30m1 stop
6:40 pm - 11:10 amSEA-OPO
32h 30m1 stop
$1,251Turkish Airlines
Find Deal
Tue, Jun 25 - Sat, Aug 3

Flights from Porto to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from Porto to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Porto to Seattle?

The average price of all flights from Porto to Seattle clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Seattle on a Tuesday and more expensive on a Monday. On your return trip to Porto, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

Which airlines provide the cheapest flights from Porto to Seattle?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Porto to Seattle found on KAYAK was with American Airlines for $689. United Airlines proposed a round-trip connection from $1,067 and American Airlines from $1,072.

Good to know

Low season

December

High season

March

Cheapest flight

$489
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Porto to Seattle

When to book flights from Porto to Seattle

Are your dates flexible? Find out the best times to travel from Porto to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Porto to Seattle

  • What is the cheapest flight from Porto to Seattle?

    In the last 3 days, the lowest price for a flight from Porto to Seattle was $489 for a one-way ticket and $1,067 for a round-trip.

  • Do I need a passport to fly between Porto and Seattle?

    A passport is required to fly from Porto to Seattle.

  • Which aircraft models fly most regularly from Porto to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Porto to Seattle?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Porto and Seattle, with Star Alliance being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Porto to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Porto to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Porto to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Porto is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Porto to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Porto with another airline. Booking your flights between Porto and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Porto to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Porto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from Porto to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Porto to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Porto to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.8
British AirwaysOverall score based on 6831 reviews
7.7Crew
6.4Food
7.0Boarding
6.8Comfort
6.5Entertainment
Airline reviews

Flight delayed an hour due to plane maintenance issues after getting in line to board. Issue was plane galley ovens which eliminated hot meals for overseas flight. Cold selections were limited due to availability. Drink and meal service (already an hour delayed) was very slow. Upon arrival in Nashville, had to sit at gate for about 15 minutes before disembarking with no explanation. Local police then boarded plane as we were disembarking so maybe that was the issue.

4.0 OkayRick, May 2024LHR - BNA
Read more about British Airways reviews

Flight delayed an hour due to plane maintenance issues after getting in line to board. Issue was plane galley ovens which eliminated hot meals for overseas flight. Cold selections were limited due to availability. Drink and meal service (already an hour delayed) was very slow. Upon arrival in Nashville, had to sit at gate for about 15 minutes before disembarking with no explanation. Local police then boarded plane as we were disembarking so maybe that was the issue.

Leg space was not enough. The meal was not satisfactory.

Boarding good. Seats uncomfortable when lie flat. Food was awful. Tasted stale and chicken was dry. No live tv or flight map. Had to pay for internet.

Poor technical details on this plane. 1) There was no WiFi on an 8 hour long-haul flight. So no work could be done. That's below the standard expected for airlines these days. 2) The power outlet at my seat was busted and not working. 3) The headphone jack was loose and I had to keep adjusting my headphones to get good reception, or when it slipped out. - The flight was delayed to due mechanics. Sometimes this can't be avoided, I understand, and it's a big inconvenience to arrive that much later when traveling across time zones (then arriving at 4am from the prior time zone). - Also unique to this flight, the northern lights were visible on the right side of the aircraft, but I only found out after we landed (b/c again no wifi). I understand there are considerations about people being out of their seats to look, but I feel extremely disappointed and resentful that I wasn't told so that I could have a chance to look at this probably once-in-a-lifetime cosmic event from a view in the sky. - Flight crew was otherwise friendly and helpful.

I would have preferred something lighter for the second meal. Maybe a small sandwich .

They cancelled our flight the morning of departure at 4:30am.

Coach seats are too tight. Seem designed for small people. Food different but OK. Staff helpful.

my original flight was cancelled the previous day, and i was rescheduled onto this flight, which left much earlier in the morning, impacting my previous evening and requiring me to get up much earlier in the morning to get to the airport online. This practice happens way way way too much, and it seems on every airline, though AA is probably the worst.

Spending 10 hours on a flight with no video or wifi access due to issues per stewardess was not enjoyable nor acceptable. Will follow up directly with the airline as well

I really did not like being ordered to pull my shade down by the attendants. One of them was very rude to me about it, standing there until I closed it like I was a child brusquely reaching across me to close an adjoining one. They claim it was so people who wanted to could sleep. It’s a 10:30am flight not a red eye. Closing your shade or leaving it up for natural light should be a choice. Ruined my flight!

Book cheap flights from Porto to Seattle

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Porto to Seattle found on KAYAK in the last 72 hours.
7/17Wed
2 stops
40h 41mOPO-SEA
$489
7/16Tue
3 stops
35h 51mOPO-SEA
$493
7/16Tue
2 stops
35h 51mOPO-SEA
$498
6/20Thu
2 stopsAmerican Airlines
21h 31mOPO-SEA
$689
7/17Wed
1 stopTurkish Airlines
31h 45mOPO-SEA
$774
6/2Sun
2 stopsTAP AIR PORTUGAL
52h 35mOPO-SEA
$821
7/15Mon
2 stopsTAP AIR PORTUGAL
35h 03mOPO-SEA
$871
7/2Tue
1 stopTurkish Airlines
37h 30mOPO-SEA
$932
7/3Wed
2 stopsWestJet
19h 06mOPO-SEA
$960
7/20Sat
2 stopsAmerican Airlines
19h 33mOPO-SEA
$1,046

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Porto - Seattle Flights

Departure:

Porto (undefined)Portugal

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Porto

Cabin classes:

Browse origins: