OPO - SEA

$444 Find Cheap Flights from Porto to Seattle - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$885
Typical prices: $917-$1,242
Multiple Airlines
Wed 10/31Wed 11/7
OPO - SEA • 3 stops
Cheapest one-way
$523
Typical prices: $723-$1,019
Multiple Airlines
Thu 12/6
OPO - SEA • 3 stops
Nonstop flights
Not available
There are currently no direct flights between Porto and Seattle. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
February
Cheapest • 22% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Montreal Pierre Elliott Trudeau Intl (YUL)
Cheapest • Avg $907 (round-trip)
Newark (EWR)
Shortest trip • 15h 38m (one-way)
Insights
Insights
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Porto to Seattle (OPO-SEA)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Porto to Seattle

Sat, Oct 31 - Sat, Nov 7
Multiple Airlines Logo
10:40 am - 2:00 pmOPO  Porto-SEA Seattle/Tacoma Intl
34h 20m3 stops Geneva Geneve-Cointrin London Heathrow Munich Franz Josef Strauss
Multiple Airlines Logo
1:50 pm - 8:10 amSEA  Seattle/Tacoma Intl-OPO Porto
34h 20m3 stops Frankfurt am Main London Heathrow Barcelona-El Prat
$885Multiple Airlines
Mon, Oct 12 - Wed, Oct 21
Delta Logo
5:00 am - 4:35 pmOPO  Porto-SEA Seattle/Tacoma Intl
19h 35m1 stop Amsterdam Schiphol
Delta Logo
6:40 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
19h 20m1 stop Paris Charles de Gaulle
$886Delta
Mon, Oct 12 - Wed, Oct 21
Delta Logo
5:00 am - 4:35 pmOPO  Porto-SEA Seattle/Tacoma Intl
19h 35m1 stop Amsterdam Schiphol
Delta Logo
6:40 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
19h 20m1 stop Paris Charles de Gaulle
$890Delta
Sat, Oct 31 - Sat, Nov 7
Delta Logo
5:00 am - 7:02 pmOPO  Porto-SEA Seattle/Tacoma Intl
21h 02m2 stops Amsterdam Schiphol Salt Lake City
Delta Logo
6:00 am - 10:35 amSEA  Seattle/Tacoma Intl-OPO Porto
20h 35m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle
$891Delta
Mon, Oct 12 - Wed, Oct 21
Multiple Airlines Logo
7:55 pm - 11:52 amOPO  Porto-SEA Seattle/Tacoma Intl
23h 57m1 stop Amsterdam Schiphol
Multiple Airlines Logo
6:40 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
19h 20m1 stop Paris Charles de Gaulle
$892Multiple Airlines
Sat, Oct 31 - Sat, Nov 7
Delta Logo
5:55 am - 2:50 pmOPO  Porto-SEA Seattle/Tacoma Intl
15h 55m1 stop Paris Charles de Gaulle
Delta Logo
4:05 pm - 10:00 pmSEA  Seattle/Tacoma Intl-OPO Porto
21h 55m1 stop Paris Charles de Gaulle
$893Delta
Mon, Oct 12 - Wed, Oct 21
Delta Logo
5:00 am - 4:35 pmOPO  Porto-SEA Seattle/Tacoma Intl
19h 35m1 stop Amsterdam Schiphol
Delta Logo
7:24 am - 10:40 amSEA  Seattle/Tacoma Intl-OPO Porto
19h 16m2 stops Boston Logan Intl Amsterdam Schiphol
$895Delta
Mon, Oct 12 - Thu, Oct 22
KLM Logo
7:55 pm - 11:52 amOPO  Porto-SEA Seattle/Tacoma Intl
23h 57m1 stop Amsterdam Schiphol
KLM Logo
5:45 pm - 7:10 pmSEA  Seattle/Tacoma Intl-OPO Porto
17h 25m1 stop Amsterdam Schiphol
$897KLM
Mon, Oct 12 - Wed, Oct 21
Delta Logo
5:00 am - 7:05 pmOPO  Porto-SEA Seattle/Tacoma Intl
22h 05m2 stops Amsterdam Schiphol Portland
Delta Logo
10:37 am - 3:30 pmSEA  Seattle/Tacoma Intl-OPO Porto
20h 53m2 stops Portland Amsterdam Schiphol
$901Delta
Mon, Oct 12 - Wed, Oct 21
KLM Logo
7:55 pm - 11:52 amOPO  Porto-SEA Seattle/Tacoma Intl
23h 57m1 stop Amsterdam Schiphol
KLM Logo
10:37 am - 10:40 amSEA  Seattle/Tacoma Intl-OPO Porto
16h 03m2 stops Portland Amsterdam Schiphol
$902KLM
Booking Insights

Price, demand and travel trends for Porto to Seattle flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Porto to Seattle with more confidence.

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

Thursday is the cheapest day of the week to fly from Porto to Seattle, it is 26% cheaper than the average day. Tuesday is the most expensive day with flight prices 9% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Porto to Seattle?

•February is the cheapest month to fly from Porto to Seattle at $845 round-trip.
•July ($4,846) and March ($1,270) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 473% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

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Key details for Porto to Seattle flights

Low season

November

Cheapest flight

$523
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 346% increase in price.
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

Your Porto to Seattle flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Porto to Seattle?

    Flights from Porto to Seattle usually depart from Porto (OPO) and arrive at Seattle/Tacoma Intl (SEA).

  • What cabin classes can I book on flights from Porto to Seattle?

    Three cabin classes are available on flights from Porto to Seattle:

    • Economy Class
    • Premium Economy Class
    • Business Class

  • Which airports do connecting flights from Porto to Seattle pass through?

    One-stop flights from Porto to Seattle most commonly connect through:

    • Amsterdam Schiphol (AMS) - 70% of one-stop connections
    • Newark (EWR) - 15% of one-stop connections
    • Paris Charles de Gaulle (CDG) - 10% of one-stop connections
    • Montreal Pierre Elliott Trudeau Intl (YUL) - 5% of one-stop connections

    Amsterdam Schiphol (AMS) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Porto to Seattle?

    Yes. Being flexible with your travel dates can save you up to 33% on the Porto to Seattle route. Thursday is the cheapest departure day at $805 round-trip on average, while Tuesday is the most expensive at $1,185, a difference of $380. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

  • How long is a flight from Porto to Seattle?

    A nonstop flight from Porto to Seattle takes 0h 00m, covering 5,083 miles.

  • Do I need a passport to fly from Porto to Seattle?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How are flight prices from Porto to Seattle looking right now?

    One-way fares from Porto to Seattle are currently lower than usual. Average one-way flight prices are about $554, which is 37% below the typical average for this route.

  • How much time can I save by choosing a different layover airport from Porto to Seattle?

    Flying via Montreal Pierre Elliott Trudeau Intl (YUL) gives the shortest average 1-stop total travel time at 14h 57m, compared with 15h 38m via Newark (EWR) and 15h 43m via Amsterdam Schiphol (AMS).

  • What is the time difference between Porto and Seattle?

    Seattle is 8 hours behind Porto (Pacific Time vs Western European Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:
    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Dollar

  • How much should I expect to pay for a Porto to Seattle flight?

    Round-trip flights from Porto to Seattle range from $917 to $1,242, with an average of $1,086 over the past 12 months. Anything below $917 counts as a good deal.

Your guide to booking Porto to Seattle flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Thursday departure instead of Tuesday. On this route, Thursday flights average $805 - about $380 less than Tuesday (32% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Porto to Seattle trip for February. Fares historically average $845 round-trip in that month - typically $4,001 less than the most expensive month, which is July (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.
    - Seattle Airport Marriott
    - Coast Gateway Hotel
    - Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

More options for your flight from Porto to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Car rentals in Seattle
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