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Cheap flights from Porto (OPO) to Seattle (SEA) from $357

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/24. 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.
OPO — SEA
Mai 26 — Jun 21
From?
To?
So 5/26
So 6/2
1 adult, Economy
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Cheap flight deals from Porto to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated Mai 21, 2024.

Popular in

July

Cheapest in

December

Average price

$962

Round-trip from

$247
High demand for flights, 26% potential price rise
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Best time to find cheap flights, 22% potential price drop
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Average for round-trip flights in May 2024
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From Porto to Seattle/Tacoma Intl
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What is the cheapest day to fly round-trip from Porto to Seattle?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 38% on your flight compared to booking on days when demand is much higher.

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

December is one of the best times of the year to fly to Seattle from Porto. Prices for December average $1,030 per person but you can even find prices for as low as $790. The most expensive prices can be found in the month of July. Opting for a December flight can save you 34% on your journey compared to booking in July

When is the cheapest time to fly from Porto to Seattle (OPO - SEA)?

When flying from Porto to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap American Airlines flights from Porto to Seattle

Explore cheap flight options specifically provided by American Airlines for the route between Porto and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,663,308 searches. Data last updated Mai 21, 2024.
Peruse some of the lowest-priced American Airlines flights we've found from Porto to Seattle. It's recommended that users confirm their flight details before booking.
Di 7/28:15 amOPO - SEA
2 stops46h 53mAmerican Airlines
Mo 7/812:13 amSEA - OPO
2 stops35h 42mAmerican Airlines
Deal found 5/20$1,335
So 8/188:15 amOPO - SEA
2 stops23h 20mAmerican Airlines
So 8/251:14 amSEA - OPO
2 stops34h 41mAmerican Airlines
Deal found 5/20$3,516

Cheap United Airlines flights from Porto to Seattle

Explore cheap flight options specifically provided by United Airlines for the route between Porto and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,663,308 searches. Data last updated Mai 21, 2024.
Browse through some of the cheapest United Airlines flights traveling from Porto to Seattle. Make sure to examine the flight information before completing your reservation.
Di 7/212:35 pmOPO - SEA
2 stops27h 27mUnited Airlines
Di 7/98:58 amSEA - OPO
2 stops16h 47mUnited Airlines
Deal found 5/20$1,248
Mo 8/196:00 amOPO - SEA
3 stops25h 59mUnited Airlines
Di 8/2710:50 pmSEA - OPO
2 stops32h 45mUnited Airlines
Deal found 5/21$3,643

Porto to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Porto and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,663,308 searches. Data last updated Mai 21, 2024.
These are some of the best deals we've found on flights to Seattle in 2024 at this time. Check back soon for alternative fares.
Di 7/21:30 pmOPO - SEA
3 stops31h 26mMultiple Airlines
Di 7/97:00 amSEA - OPO
3 stops30h 15mMultiple Airlines
Deal found 5/20$1,075
Di 7/24:20 pmOPO - SEA
1 stop25h 55mMultiple Airlines
Di 7/91:35 pmSEA - OPO
1 stop17h 55mMultiple Airlines
Deal found 5/20$1,137
Di 7/212:35 pmOPO - SEA
2 stops27h 27mUnited Airlines
Di 7/98:58 amSEA - OPO
2 stops16h 47mUnited Airlines
Deal found 5/20$1,248
Di 7/21:30 pmOPO - SEA
3 stops31h 26mMultiple Airlines
Di 7/95:50 amSEA - OPO
2 stops17h 10mMultiple Airlines
Deal found 5/20$1,273
Di 7/28:15 amOPO - SEA
2 stops46h 53mAmerican Airlines
Mo 7/812:13 amSEA - OPO
2 stops35h 42mAmerican Airlines
Deal found 5/20$1,335
Mo 8/1912:35 pmOPO - SEA
2 stops29h 59mMultiple Airlines
Di 8/279:29 pmSEA - OPO
1 stop17h 56mMultiple Airlines
Deal found 5/21$2,889
So 8/1812:35 pmOPO - SEA
2 stops30h 05mMultiple Airlines
Mo 8/267:26 amSEA - OPO
2 stops20h 14mMultiple Airlines
Deal found 5/20$3,033
So 8/1812:15 pmOPO - SEA
1 stop36h 30mTurkish Airlines
Mo 8/266:40 pmSEA - OPO
1 stop37h 20mTurkish Airlines
Deal found 5/20$3,139
Mo 8/196:00 amOPO - SEA
2 stops24h 59mMultiple Airlines
Di 8/278:01 amSEA - OPO
2 stops30h 49mMultiple Airlines
Deal found 5/21$3,150

One-way flights to Seattle from Porto

Search for one-way flight options from Porto to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,663,308 searches. Data last updated Mai 21, 2024.
Take a look at some of the best available options we've come across on one-way flights from Porto to Seattle. Those needing a return flight from Porto to Seattle can use the search form above.
Do 10/246:40 amOPO - SEA
2 stops20h 21mMultiple Airlines
Deal found 5/20$357
Mi 6/56:45 amOPO - SEA
3 stops33h 47mMultiple Airlines
Deal found 5/20$395
Mi 6/56:45 amOPO - SEA
3 stops45h 24mMultiple Airlines
Deal found 5/20$407
Di 10/226:40 amOPO - SEA
2 stops20h 21mMultiple Airlines
Deal found 5/20$427
Di 10/2211:00 amOPO - SEA
3 stops33h 56mMultiple Airlines
Deal found 5/20$467
Mo 10/2112:35 pmOPO - SEA
3 stops32h 21mMultiple Airlines
Deal found 5/20$473
Do 10/2411:00 amOPO - SEA
3 stops33h 56mMultiple Airlines
Deal found 5/20$482
Mi 10/234:55 amOPO - SEA
3 stops23h 31mMultiple Airlines
Deal found 5/20$494
Mo 10/219:50 pmOPO - SEA
2 stops32h 26mMultiple Airlines
Deal found 5/20$505

Find flights from Porto to Seattle within your budget

Customize your flight search to find flights from Porto to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,663,308 searches. Data last updated Mai 21, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,075 - $3,516

Route

Depart

Return

Price

PortoSeattle/Tacoma Intl

OPO - SEA

OPOSEA

Porto

Di 7/2

3 stops31h 26m

Seattle/Tacoma Intl

Di 7/9

3 stops30h 15m

$1,075

PortoSeattle/Tacoma Intl

OPO - SEA

OPOSEA

Porto

Di 7/2

1 stop25h 55m

Seattle/Tacoma Intl

Di 7/9

1 stop17h 55m

$1,137

PortoSeattle/Tacoma Intl

OPO - SEA

OPOSEA

Porto

Di 7/2

2 stops27h 27m

Seattle/Tacoma Intl

Di 7/9

2 stops16h 47m

$1,248

PortoSeattle/Tacoma Intl

OPO - SEA

OPOSEA

Porto

Di 7/2

3 stops31h 26m

Seattle/Tacoma Intl

Di 7/9

2 stops17h 10m

$1,273

PortoSeattle/Tacoma Intl

OPO - SEA

OPOSEA

Porto

Di 7/2

2 stops46h 53m

Seattle/Tacoma Intl

Mo 7/8

2 stops35h 42m

$1,335

PortoSeattle/Tacoma Intl

OPO - SEA

OPOSEA

Porto

Mo 8/19

2 stops29h 59m

Seattle/Tacoma Intl

Di 8/27

1 stop17h 56m

$2,889

PortoSeattle/Tacoma Intl

OPO - SEA

OPOSEA

Porto

So 8/18

1 stop36h 30m

Seattle/Tacoma Intl

Mo 8/26

1 stop37h 20m

$3,139

PortoSeattle/Tacoma Intl

OPO - SEA

OPOSEA

Porto

Mo 8/19

1 stop27h 40m

Seattle/Tacoma Intl

Di 8/27

1 stop24h 35m

$3,369

PortoSeattle/Tacoma Intl

OPO - SEA

OPOSEA

Porto

So 8/18

2 stops23h 20m

Seattle/Tacoma Intl

So 8/25

2 stops34h 41m

$3,516

Flights are sorted by cheapest first

Deals found on 5/20

When is the cheapest time to fly from Porto to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Porto to Seattle. Price data was last updated on May 19, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Porto to Seattle flight should consider departing on Wednesday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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Best time to book a flight from Porto to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Porto with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

41 - 66.2 °F

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated Mai 21, 2024.
See what other customers who have flown with American Airlines and United Airlines from Porto to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,595 reviews
Check prices

Overall

8.0

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.0
Very good
10,595 reviews
Delta
8.0
Very good
10,595 reviews
Check prices

Overall

8.0

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

KLM
7.9
Good
1,554 reviews
Delta
8.0
Very good
10,595 reviews
Check prices

Overall

8.0

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

WestJet
7.5
Good
2,899 reviews
Delta
8.0
Very good
10,595 reviews
Check prices

Overall

8.0

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Turkish Airlines
7.4
Good
3,714 reviews
Delta
8.0
Very good
10,595 reviews
Check prices

Overall

8.0

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

United Airlines
7.4
Good
10,884 reviews
Delta
8.0
Very good
10,595 reviews
Check prices

Overall

8.0

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

Find useful and relevant information for your journey from Porto to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Porto to Seattle for under $1,100 on Cheapflights?

    Yes, there are multiple flights from Porto to Seattle for under $1,100. The cheapest flight booked recently is on Multiple Airlines for just $1,075, but on average you can expect to pay $3,023.

  • What are the cheapest airlines flying from Porto to Seattle round-trip?

    Currently priced at $1,248, United Airlines will fly you from Porto to Seattle and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Turkish Airlines - these airlines can fly you to your destination from $1,335 and $3,139, respectively.

  • What are the cheapest airlines to fly from Porto to Seattle one-way?

    The cheapest airlines for a one-way flight from Porto to Seattle are American Airlines ($690), British Airways ($725), and United Airlines ($923).

  • What does OPO to SEA mean?

    Porto Airport is OPO and Seattle/Tacoma Intl Airport is SEA. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

  • Can I find deals for flights from Porto to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your Porto to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Porto to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Porto to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Porto to Seattle that include hotel bookings?

    Yes. In addition to deals on Porto to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Porto to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Porto to Seattle.

  • Can I find deals for business class flights from Porto to Seattle?

    Yes. Cheapflights offers flight deals from Porto to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Porto to Seattle that allow pets onboard?

    Many airlines flying from Porto to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Porto to Seattle?

    Yes, you can often find last-minute deals on Porto to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Porto to Seattle flight deals updated?

    The Porto to Seattle flight deals you see on this page were last updated on 5/21.

  • When is the best time to book a flight from Porto to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Porto to Seattle (average of $247). Flying from Porto to Seattle in July is currently the most expensive (average of $407). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Porto to Seattle
See prices for flight routes from nearby airports that may be better suited for you.

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Top airline flying from Porto to Seattle

Discover the top airline that operate flights from Porto to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,663,308 searches. Data last updated Mai 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$700Average$986FlexibilityNo cancel feeOn-time70%
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Search flights from Porto to Seattle by cabin class

Find flights from Porto to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Porto to Seattle?

Deals for Porto to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Porto to Seattle?

Cheapflights simply makes it quick and affordable to book flights from Porto to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Porto to Seattle with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Porto to Seattle flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Porto to Seattle become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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