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Cheap flights from Seattle (SEA) to Porto (OPO) from $629

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/4. 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.
SEA — OPO
Jun 7 — Jun 141
From?
To?
Fri 6/7
Fri 6/14
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Porto are usually found in February or November, booked 16 days in advance, depart on a Monday or Wednesday and return on a Tuesday

Cheap flight deals from Seattle to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Porto (OPO). 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 June 2, 2024.

Popular in

June

Cheapest in

February

Average price

$1,689

Round-trip from

$523
High demand for flights, 32% potential price rise
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Best time to find cheap flights, 34% potential price drop
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Average for round-trip flights in June 2024
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From Seattle/Tacoma Intl to Porto
Search Deals

What is the cheapest day to fly round-trip from Seattle to Porto?

Flights from Seattle to Porto are found to be more expensive on Thursday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Porto.

How far in advance should I book a flight from Seattle to Porto?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 17 days in advance, which can save you up to 52% on flights from Seattle to Porto compared to booking the week you need them. Waiting 17 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $984. For sooner than that we have options available in the next 3 days from $2,570.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, February can be a great choice for travel to Porto. Flights to Porto from Seattle in February are about $1,145 on average during February, but can be found for as low as $693.

What is the cheapest time of day to fly from SEA to OPO?

It’s optimal to fly from Seattle to Porto in the morning. By choosing this option you can save up to 5% on the cost of your flight, compared to a flight in the evening.

Cheap Turkish Airlines flights from Seattle to Porto

Explore cheap flight options specifically provided by Turkish Airlines for the route between Seattle and Porto. 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 2,807,690 searches. Data last updated June 2, 2024.
Consider these cheap Turkish Airlines flights we've found departing from Seattle to Porto. Be sure to come back soon if the deals available don't appeal to you at this time.
Mon 9/166:40 pmSEA - OPO
1 stop37h 20mTurkish Airlines
Thu 9/264:50 pmOPO - SEA
1 stop31h 55mTurkish Airlines
Deal found 6/1$930
Sun 9/156:40 pmSEA - OPO
1 stop31h 35mTurkish Airlines
Sun 9/225:25 pmOPO - SEA
1 stop31h 20mTurkish Airlines
Deal found 6/1$968
Thu 9/2612:15 pmSEA - OPO
1 stop19h 35mTurkish Airlines
Wed 10/95:00 pmOPO - SEA
1 stop25h 30mTurkish Airlines
Deal found 5/31$1,007
Sat 10/196:40 pmSEA - OPO
1 stop32h 30mTurkish Airlines
Thu 10/244:50 pmOPO - SEA
1 stop31h 55mTurkish Airlines
Deal found 6/2$1,017

Cheap KLM flights from Seattle to Porto

Explore cheap flight options specifically provided by KLM for the route between Seattle and Porto. 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 2,807,690 searches. Data last updated June 2, 2024.
Some of the best deals we've found on KLM flights traveling from Seattle to Porto. Ensure the flight price, dates, time, and airline match your criteria before you book.
Tue 9/246:10 pmSEA - OPO
1 stop20h 05mKLM
Tue 10/84:20 pmOPO - SEA
1 stop26h 15mKLM
Deal found 5/31$894
Tue 9/176:10 pmSEA - OPO
1 stop20h 05mKLM
Thu 9/266:30 amOPO - SEA
2 stops21h 25mKLM
Deal found 6/1$904
Fri 10/46:05 pmSEA - OPO
1 stop20h 10mKLM
Sun 10/134:20 pmOPO - SEA
1 stop26h 15mKLM
Deal found 6/1$994
Mon 9/166:10 pmSEA - OPO
1 stop20h 05mKLM
Thu 9/266:30 amOPO - SEA
2 stops21h 25mKLM
Deal found 6/1$1,038
Sat 6/86:05 pmSEA - OPO
1 stop20h 10mKLM
Sat 6/224:20 pmOPO - SEA
1 stop26h 00mKLM
Deal found 6/1$1,048
Mon 9/239:15 pmSEA - OPO
2 stops17h 00mKLM
Mon 10/78:40 pmOPO - SEA
1 stop21h 55mKLM
Deal found 5/31$1,113
Wed 9/253:15 pmSEA - OPO
2 stops16h 25mKLM
Sat 10/58:55 pmOPO - SEA
1 stop21h 40mKLM
Deal found 6/2$1,171
Wed 9/259:15 pmSEA - OPO
2 stops17h 00mKLM
Mon 10/76:30 amOPO - SEA
2 stops20h 45mKLM
Deal found 5/31$1,182
Wed 7/101:25 pmSEA - OPO
1 stop18h 15mKLM
Thu 8/16:30 amOPO - SEA
2 stops20h 50mKLM
Deal found 5/31$1,187

Cheap Seattle to Porto flights in June & July 2024

Find cheap flight options from Seattle to Porto specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,807,690 searches. Prices were last updated on June 2, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to Porto in 2024. For more flight deals, be sure to check back very soon.
Mon 6/1011:00 pmSEA - OPO
2 stops32h 30mDelta
Wed 6/269:15 amOPO - SEA
1 stop16h 20mDelta
Deal found 6/1$936
Mon 6/1011:00 pmSEA - OPO
2 stops25h 25mDelta
Wed 6/269:15 amOPO - SEA
2 stops32h 55mDelta
Deal found 6/1$942
Sat 6/81:35 pmSEA - OPO
1 stop17h 55mDelta
Sat 6/225:00 amOPO - SEA
2 stops24h 34mDelta
Deal found 6/1$1,046
Sat 6/86:05 pmSEA - OPO
1 stop20h 10mKLM
Sat 6/224:20 pmOPO - SEA
1 stop26h 00mKLM
Deal found 6/1$1,048
Sat 6/811:15 amSEA - OPO
2 stops20h 15mDelta
Sat 6/225:00 amOPO - SEA
2 stops24h 34mDelta
Deal found 6/1$1,050
Thu 6/1312:10 pmSEA - OPO
1 stop13h 35mUnited Airlines
Sun 6/1612:35 pmOPO - SEA
2 stops27h 27mUnited Airlines
Deal found 6/2$1,301
Thu 6/131:10 pmSEA - OPO
2 stops21h 20mSWISS
Sun 6/168:40 amOPO - SEA
2 stops17h 47mSWISS
Deal found 6/2$1,303
Sat 6/298:47 amSEA - OPO
3 stops29h 03mMultiple Airlines
Sat 7/61:30 pmOPO - SEA
3 stops33h 16mMultiple Airlines
Deal found 5/31$1,306
Thu 6/276:05 pmSEA - OPO
1 stop20h 10mKLM
Thu 7/49:45 amOPO - SEA
1 stop14h 50mKLM
Deal found 6/2$1,338

Seattle to Porto 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Porto in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to Porto in 2024. For more flight deals, be sure to check back very soon.
Mon 11/42:35 pmSEA - OPO
1 stop16h 50mKLM
Mon 11/184:10 pmOPO - SEA
1 stop26h 05mKLM
Deal found 6/2$629
Sat 11/211:50 pmSEA - OPO
2 stops28h 50mUnited Airlines
Tue 11/1212:30 pmOPO - SEA
2 stops28h 06mUnited Airlines
Deal found 6/1$683
Mon 11/46:45 pmSEA - OPO
2 stops33h 00mBritish Airways
Mon 11/1812:25 pmOPO - SEA
2 stops31h 00mBritish Airways
Deal found 6/2$686
Sat 11/211:50 pmSEA - OPO
2 stops28h 50mUnited Airlines
Tue 11/1212:30 pmOPO - SEA
1 stop31h 40mUnited Airlines
Deal found 6/1$690
Mon 11/42:00 pmSEA - OPO
1 stop24h 25mLufthansa
Mon 11/181:45 pmOPO - SEA
2 stops30h 25mLufthansa
Deal found 6/2$711
Thu 11/712:40 pmSEA - OPO
1 stop14h 10mDelta
Sat 11/1611:15 amOPO - SEA
1 stop31h 00mDelta
Deal found 6/2$715
Sat 11/29:35 amSEA - OPO
2 stops22h 50mMultiple Airlines
Tue 11/126:00 amOPO - SEA
2 stops23h 08mMultiple Airlines
Deal found 6/2$719
Thu 11/75:40 amSEA - OPO
2 stops21h 10mDelta
Sat 11/1611:15 amOPO - SEA
1 stop31h 00mDelta
Deal found 6/2$720
Sat 11/23:00 pmSEA - OPO
1 stop17h 25mLufthansa
Tue 11/124:30 pmOPO - SEA
1 stop27h 40mLufthansa
Deal found 6/1$734

Seattle to Porto flights leaving soon

Find last-minute flight options from Seattle to Porto for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Consider one of these great deals we found on last-minute flights from Seattle to Porto. To prevent any unwanted surprises, users should verify their flight info before booking.
Mon 6/1011:00 pmSEA - OPO
2 stops32h 30mDelta
Wed 6/269:15 amOPO - SEA
1 stop16h 20mDelta
Deal found 6/1$936
Mon 6/1011:00 pmSEA - OPO
2 stops25h 25mDelta
Wed 6/269:15 amOPO - SEA
2 stops32h 55mDelta
Deal found 6/1$942
Sat 6/81:35 pmSEA - OPO
1 stop17h 55mDelta
Sat 6/225:00 amOPO - SEA
2 stops24h 34mDelta
Deal found 6/1$1,046
Sat 6/86:05 pmSEA - OPO
1 stop20h 10mKLM
Sat 6/224:20 pmOPO - SEA
1 stop26h 00mKLM
Deal found 6/1$1,048
Sat 6/811:15 amSEA - OPO
2 stops20h 15mDelta
Sat 6/225:00 amOPO - SEA
2 stops24h 34mDelta
Deal found 6/1$1,050
Sat 6/85:15 pmSEA - OPO
1 stop21h 30mMultiple Airlines
Sat 6/226:00 amOPO - SEA
1 stop16h 10mMultiple Airlines
Deal found 6/2$1,696
Tue 6/117:00 amSEA - OPO
2 stops24h 30mWestJet
Fri 6/149:15 amOPO - SEA
2 stops19h 05mWestJet
Deal found 6/1$2,133
Wed 6/121:14 amSEA - OPO
2 stops46h 21mAmerican Airlines
Sun 6/1612:20 pmOPO - SEA
2 stops41h 26mAmerican Airlines
Deal found 6/2$2,281
Sat 6/86:51 amSEA - OPO
2 stops19h 04mTAP AIR PORTUGAL
Sat 6/2212:30 pmOPO - SEA
2 stops29h 43mTAP AIR PORTUGAL
Deal found 6/2$2,288

One-way flights to Porto from Seattle

Search for one-way flight options from Seattle to Porto. 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 2,807,690 searches. Data last updated June 2, 2024.
Users in need of a one-way flight from Seattle to Porto can choose from these deals. Those needing a return flight from Seattle to Porto can use the search form above.
Tue 8/271:50 pmSEA - OPO
2 stops17h 40mWestJet
Deal found 6/1$706
Tue 8/2712:15 pmSEA - OPO
1 stop19h 45mTurkish Airlines
Deal found 6/1$729
Sun 6/911:00 pmSEA - OPO
2 stops25h 50mMultiple Airlines
Deal found 6/1$776
Sat 7/2010:52 pmSEA - OPO
2 stops28h 48mAmerican Airlines
Deal found 6/1$811
Sat 7/205:15 pmSEA - OPO
1 stop14h 30mMultiple Airlines
Deal found 6/1$826
Sun 6/94:55 pmSEA - OPO
1 stop21h 55mMultiple Airlines
Deal found 6/1$875
Tue 8/2712:55 pmSEA - OPO
3 stops36h 50mUnited Airlines
Deal found 6/1$921
Sun 6/91:10 pmSEA - OPO
2 stops34h 45mSWISS
Deal found 6/1$943
Sun 6/912:45 pmSEA - OPO
3 stops34h 10mUnited Airlines
Deal found 6/1$966

Find flights from Seattle to Porto within your budget

Customize your flight search to find flights from Seattle to Porto 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 2,807,690 searches. Data last updated June 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$683 - $932

Route

Depart

Return

Price

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sat 11/2

2 stops28h 50m

Porto

Tue 11/12

2 stops28h 06m

$683

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sat 11/2

1 stop17h 25m

Porto

Tue 11/12

1 stop27h 40m

$734

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Tue 10/15

1 stop19h 40m

Porto

Thu 10/31

1 stop31h 35m

$838

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Tue 10/15

2 stops26h 12m

Porto

Thu 10/31

2 stops28h 12m

$879

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Wed 9/25

1 stop30h 10m

Porto

Fri 10/11

1 stop16h 35m

$881

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Tue 9/24

1 stop20h 05m

Porto

Tue 10/8

1 stop26h 15m

$894

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Mon 9/2

2 stops27h 55m

Porto

Thu 9/12

2 stops40h 53m

$918

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Mon 9/16

1 stop37h 20m

Porto

Thu 9/26

1 stop31h 55m

$930

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Mon 9/2

1 stop15h 55m

Porto

Thu 9/12

2 stops20h 54m

$932

Flights are sorted by cheapest first

Deals found on 6/1

How far ahead should I book a flight from Seattle to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Porto. Price data was last updated on May 31, 2024.
Booking 16 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Porto. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

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

Use this chart to determine the cheapest time to fly round-trip from Seattle to Porto. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to Porto flight should consider departing on Saturday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Seattle to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Seattle 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 Porto by month

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

OPO

Temperature

48.2 - 68 °F

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated June 2, 2024.
To help decide which airline to fly from Seattle to Porto, see what other customers have to say about Turkish Airlines, KLM and Lufthansa. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,402 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,402 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,507 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

SWISS
7.8
Good
1,940 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Air France
7.5
Good
1,728 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

WestJet
7.5
Good
2,860 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Overall

8.0

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Porto. 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 Seattle to Porto for under $700 on Cheapflights?

    Yes, there are multiple flights from Seattle to Porto for under $700. The cheapest flight booked recently is on United Airlines for just $683, but on average you can expect to pay $862.

  • Are there last-minute flights available from Seattle to Porto for under $1,000?

    There are currently 14+ open flights from Seattle to Porto within the next 7 days for less than $1,000.

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

    Our cheapest airline available from Seattle to Porto is United Airlines. Our recent data shows that you can find tickets from as low as $683 on this airline. Additional options worth looking into are Lufthansa and American Airlines, starting at $734 and $879 round-trip. Users have found that United Airlines is 40% cheaper than the other options available to this destination.

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

    $706 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Turkish Airlines and American Airlines, with prices starting from $729 and $811, respectively.

  • What does SEA to OPO mean?

    This is defined as Seattle/Tacoma Intl Airport (SEA) and Porto Airport (OPO). Codes like Porto Airport are often used to just call airports uniquely.

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

    The amount of baggage you can bring on your Seattle to Porto 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 Seattle to Porto with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Porto 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 Seattle to Porto that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Porto 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 Seattle to Porto that allow pets onboard?

    Many airlines flying from Seattle to Porto 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 Seattle to Porto?

    Yes, you can often find last-minute deals on Seattle to Porto 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 Seattle to Porto flight deals updated?

    The Seattle to Porto flight deals you see on this page were last updated on 6/2.

  • What are the most popular airlines that fly from Seattle to Porto?

    When booking a flight from Seattle to Porto, you may want to consider flying on American Airlines, Air France or British Airways as they are the most popular for this route.

  • What is the cheapest month to book a flight from Seattle to Porto?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Porto (average of $523). Flying from Seattle to Porto in June is currently the most expensive (average of $994). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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

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Top 9 airlines flying from Seattle to Porto

Discover the top 9 airlines that operate flights from Seattle to Porto. 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 2,807,690 searches. Data last updated June 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$544Average$725FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
IberiaCheapest$651Average$1,130FlexibilityNo cancel feeOn-time77%
Search Iberia flights
DeltaCheapest$725Average$1,081FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
KLMCheapest$761Average$1,138FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest$846Average$1,175FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest$857Average$1,147FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest$911Average$1,358FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Turkish AirlinesCheapest$914Average$976FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights
Air FranceCheapest$1,116Average$1,562FlexibilityNo cancel feeOn-time77%
Search Air France flights
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Search flights from Seattle to Porto by cabin class

Find flights from Seattle to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Can Cheapflights find flights from Seattle to Porto with no change fees?

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Porto from Seattle today and book when prices fit your budget.

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