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Cheap flights from Seattle (SEA) to Portugal from $343

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 8/20. 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 — LIS
Jun 4 — Jun 111
From?
To?
Tue 6/4
Tue 6/11
1 adult, Economy
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How far in advance should I book a flight from Seattle to Portugal?

Users have found that booking a flight from Seattle to Portugal at least 38 days early can save you up to 46% on average compared to booking a flight this week. If booking 38 days before your flight isn’t an option for you, users have found flights from Seattle to Portugal for as little as $729 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $997 for flights departing within the next 3 days.

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

The best pricing can be found in the month of February. Prices to Portugal from Seattle average $1,037. You can even find prices in February for less than $1,037, as users have found deals to Portugal from as low as $455. The month of June appears to be one of the more expensive times to travel to Portugal from Seattle. Flying in the targeted month can save you up to 44%.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Portugal as you normally would.

Cheap Finnair flights from Seattle to Portugal

Explore cheap flight options specifically provided by Finnair for the route between Seattle and Portugal. 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 2,784,634 searches. Data last updated May 30, 2024.
Peruse some of the lowest-priced Finnair flights we've found from Seattle to Portugal. It's recommended that users confirm their flight details before booking.
Tue 8/135:40 pmSEA - LIS
1 stop38h 00mFinnair
Wed 8/216:35 amLIS - SEA
2 stops24h 13mFinnair
Deal found 5/29$966
Tue 8/135:40 pmSEA - LIS
1 stop38h 00mFinnair
Wed 8/216:35 amLIS - SEA
2 stops24h 13mFinnair
Deal found 5/30$969

Cheap KLM flights from Seattle to Portugal

Explore cheap flight options specifically provided by KLM for the route between Seattle and Portugal. 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 2,784,634 searches. Data last updated May 30, 2024.
Some of the lowest-priced KLM flights we've found at this time heading from Seattle to Portugal. Check back soon if you're not seeing flights that suit your needs.
Wed 7/247:50 amSEA - LIS
1 stop18h 55mKLM
Wed 8/1412:45 pmLIS - SEA
1 stop17h 40mKLM
Deal found 5/29$1,033
Sat 6/86:05 pmSEA - OPO
1 stop20h 10mKLM
Sat 6/224:20 pmOPO - SEA
1 stop26h 00mKLM
Deal found 5/30$1,227
Thu 6/276:05 pmSEA - OPO
1 stop13h 35mKLM
Thu 7/44:20 pmOPO - SEA
1 stop25h 55mKLM
Deal found 5/30$1,385
Fri 6/286:05 pmSEA - FAO
1 stop15h 05mKLM
Fri 7/58:10 amFAO - SEA
1 stop16h 25mKLM
Deal found 5/29$2,179

Cheap Seattle to Portugal flights in May & June 2024

Find cheap flight options from Seattle to Portugal specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Prices were last updated on May 30, 2024.
The lowest fares we've come across on flights traveling from Seattle to Portugal in May and June 2024. For more flight deals, be sure to check back very soon.
Wed 6/53:10 pmSEA - LIS
3 stops34h 10mMultiple Airlines
Tue 6/1111:25 amLIS - SEA
3 stops33h 31mMultiple Airlines
Deal found 5/29$969
Thu 6/65:53 amSEA - LIS
2 stops19h 12mAmerican Airlines
Wed 6/128:55 amLIS - SEA
2 stops20h 51mAmerican Airlines
Deal found 5/30$972
Thu 6/61:30 pmSEA - LIS
1 stop20h 35mBritish Airways
Wed 6/123:15 pmLIS - SEA
1 stop28h 15mBritish Airways
Deal found 5/29$973
Thu 6/67:42 amSEA - LIS
2 stops17h 23mAmerican Airlines
Tue 6/1111:05 amLIS - SEA
1 stop19h 24mAmerican Airlines
Deal found 5/29$974
Sat 6/811:35 pmSEA - LIS
1 stop25h 30mAmerican Airlines
Mon 6/1711:05 amLIS - SEA
1 stop19h 24mAmerican Airlines
Deal found 5/29$978
Thu 6/612:25 pmSEA - LIS
1 stop12h 40mAmerican Airlines
Wed 6/123:15 pmLIS - SEA
1 stop28h 15mAmerican Airlines
Deal found 5/30$979
Sat 6/811:35 pmSEA - LIS
1 stop25h 30mAmerican Airlines
Mon 6/1711:05 amLIS - SEA
2 stops17h 35mAmerican Airlines
Deal found 5/29$981
Mon 6/37:40 pmSEA - LIS
1 stop19h 10mBritish Airways
Mon 6/177:15 amLIS - SEA
2 stops22h 42mBritish Airways
Deal found 5/29$983
Wed 6/511:25 amSEA - LIS
2 stops28h 05mMultiple Airlines
Tue 6/116:45 amLIS - SEA
2 stops24h 05mMultiple Airlines
Deal found 5/29$990

Seattle to Portugal 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Portugal in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
The lowest fares we've come across on flights traveling from Seattle to Portugal in May and June 2024. For more flight deals, be sure to check back very soon.
Sun 11/106:45 pmSEA - OPO
2 stops17h 15mAmerican Airlines
Thu 12/58:20 amOPO - SEA
2 stops24h 37mAmerican Airlines
Deal found 5/29$607
Tue 11/129:45 amSEA - OPO
2 stops41h 30mMultiple Airlines
Thu 12/56:00 amOPO - SEA
2 stops23h 08mMultiple Airlines
Deal found 5/29$661
Wed 11/139:55 amSEA - OPO
2 stops21h 30mAir Canada
Tue 12/36:00 amOPO - SEA
2 stops23h 08mAir Canada
Deal found 5/29$664
Wed 10/309:35 amSEA - OPO
2 stops26h 05mMultiple Airlines
Wed 11/66:00 amOPO - SEA
2 stops23h 08mMultiple Airlines
Deal found 5/29$667
Mon 11/112:00 pmSEA - OPO
1 stop17h 25mLufthansa
Fri 12/66:05 amOPO - SEA
1 stop15h 15mLufthansa
Deal found 5/29$668
Sat 11/99:35 amSEA - OPO
2 stops42h 05mMultiple Airlines
Thu 12/56:00 amOPO - SEA
2 stops23h 08mMultiple Airlines
Deal found 5/29$669
Sun 11/102:00 pmSEA - OPO
1 stop17h 25mMultiple Airlines
Thu 12/57:30 pmOPO - SEA
2 stops33h 38mMultiple Airlines
Deal found 5/29$672
Mon 11/117:12 amSEA - OPO
2 stops20h 23mMultiple Airlines
Fri 12/66:05 amOPO - SEA
1 stop15h 15mMultiple Airlines
Deal found 5/29$674
Sun 11/1012:40 pmSEA - OPO
1 stop14h 10mDelta
Thu 12/511:15 amOPO - SEA
1 stop31h 00mDelta
Deal found 5/29$675

Seattle to Portugal flights leaving soon

Find last-minute flight options from Seattle to Portugal 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 2,784,634 searches. Data last updated May 30, 2024.
Consider one of these great deals we found on last-minute flights from Seattle to Portugal. To prevent any unwanted surprises, users should verify their flight info before booking.
Wed 6/57:40 pmSEA - LIS
1 stop19h 35mBritish Airways
Tue 6/1111:05 amLIS - SEA
1 stop19h 24mBritish Airways
Deal found 5/29$914
Mon 6/107:40 pmSEA - LIS
1 stop19h 35mBritish Airways
Mon 6/176:45 pmLIS - SEA
1 stop24h 50mBritish Airways
Deal found 5/29$923
Mon 6/31:30 pmSEA - LIS
1 stop20h 35mBritish Airways
Mon 6/176:45 pmLIS - SEA
1 stop31h 00mBritish Airways
Deal found 5/29$950
Thu 6/61:30 pmSEA - LIS
1 stop25h 35mBritish Airways
Tue 6/1111:05 amLIS - SEA
1 stop19h 24mBritish Airways
Deal found 5/29$964
Wed 6/53:10 pmSEA - LIS
3 stops34h 10mMultiple Airlines
Tue 6/1111:25 amLIS - SEA
3 stops33h 31mMultiple Airlines
Deal found 5/29$969
Thu 6/61:30 pmSEA - LIS
1 stop20h 35mBritish Airways
Wed 6/123:15 pmLIS - SEA
1 stop28h 15mBritish Airways
Deal found 5/29$973
Thu 6/67:42 amSEA - LIS
2 stops17h 23mAmerican Airlines
Tue 6/1111:05 amLIS - SEA
1 stop19h 24mAmerican Airlines
Deal found 5/29$974
Sat 6/811:35 pmSEA - LIS
1 stop25h 30mAmerican Airlines
Mon 6/1711:05 amLIS - SEA
1 stop19h 24mAmerican Airlines
Deal found 5/29$978
Sat 6/811:35 pmSEA - LIS
1 stop25h 30mAmerican Airlines
Mon 6/1711:05 amLIS - SEA
2 stops17h 35mAmerican Airlines
Deal found 5/29$981

One-way flights to Portugal from Seattle

Search for one-way flight options from Seattle to Portugal. 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 2,784,634 searches. Data last updated May 30, 2024.
Users traveling one-way from Seattle to Portugal can select one of these great deals. Users needing a return flight from Seattle to Portugal should utilize the search form above.
Tue 8/2011:00 pmSEA - LIS
2 stops38h 50mMultiple Airlines
Deal found 5/29$343
Thu 7/251:50 pmSEA - LIS
2 stops23h 35mMultiple Airlines
Deal found 5/29$351
Thu 7/251:50 pmSEA - LIS
3 stops23h 45mMultiple Airlines
Deal found 5/29$359
Mon 7/2211:00 pmSEA - LIS
2 stops38h 05mMultiple Airlines
Deal found 5/30$364
Tue 7/236:55 pmSEA - LIS
2 stops18h 10mMultiple Airlines
Deal found 5/29$378
Tue 9/241:50 pmSEA - OPO
2 stops21h 00mMultiple Airlines
Deal found 5/28$384
Wed 7/105:15 pmSEA - LIS
2 stops55h 50mMultiple Airlines
Deal found 5/28$386
Wed 7/106:55 pmSEA - LIS
3 stops28h 00mMultiple Airlines
Deal found 5/28$399
Tue 8/206:55 pmSEA - LIS
3 stops18h 40mMultiple Airlines
Deal found 5/29$406

Find flights from Seattle to Portugal within your budget

Customize your flight search to find flights from Seattle to Portugal 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 2,784,634 searches. Data last updated May 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$607 - $918

Route

Depart

Return

Price

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sun 11/10

2 stops17h 15m

Porto

Thu 12/5

2 stops24h 37m

$607

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Tue 11/12

2 stops41h 30m

Porto

Thu 12/5

2 stops23h 08m

$661

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Wed 11/13

2 stops21h 30m

Porto

Tue 12/3

2 stops23h 08m

$664

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Mon 11/11

1 stop17h 25m

Porto

Fri 12/6

1 stop15h 15m

$668

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sun 11/10

1 stop14h 10m

Porto

Wed 12/4

1 stop31h 00m

$675

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Wed 10/30

1 stop17h 25m

Porto

Wed 11/6

2 stops24h 22m

$679

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Thu 11/14

2 stops17h 57m

Porto

Thu 12/5

2 stops20h 32m

$701

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sun 10/20

1 stop29h 05m

Porto

Fri 11/8

1 stop31h 10m

$841

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Tue 9/3

1 stop37h 10m

Porto

Mon 9/30

1 stop36h 35m

$918

Flights are sorted by cheapest first

Deals found on 5/29

No data available for this route at this time. Please check back soon.

Best time to book a flight from Seattle to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal 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.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated May 30, 2024.
Read through reviews of airlines operating flights from Seattle to Portugal, such as Finnair, KLM and SWISS. 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
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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
10,457 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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
1,520 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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
1,954 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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.

Finnair
7.8
Good
1,372 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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
1,730 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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 Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Portugal?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Portugal. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • Can I find flights from Seattle to Portugal for under $700 on Cheapflights?

    Yes, there are multiple flights from Seattle to Portugal for under $700. The cheapest flight booked recently is on American Airlines for just $607, but on average you can expect to pay $676.

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

    There are currently 20+ open flights from Seattle to Portugal within the next 7 days for less than $1,000.

  • What are the most popular routes from Seattle to Portugal?

    When deciding which route to take from Seattle to Portugal consider Seattle/Tacoma Intl - Lisbon Humberto Delgado, Seattle/Tacoma Intl - Porto or Seattle/Tacoma Intl - Ponta Delgada Nordela as they are the most popular.

  • What does SEA to LIS mean?

    SEA stands for Seattle/Tacoma Intl Airport, while LIS stands for Lisbon Humberto Delgado Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Porto Airport (OPO), Faro Airport (FAO), Funchal Madeira Airport (FNC), Ponta Delgada Nordela Airport (PDL), Lajes Airport (TER) are some additional IATA codes for airports related to your trip.

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

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

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

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

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

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

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

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

    Many airlines flying from Seattle to Portugal 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 Portugal?

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

    The Seattle to Portugal flight deals you see on this page were last updated on 5/29.

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

    American Airlines, Air Canada and Air France are the most popular airlines when flying from Seattle to Portugal.

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

    Currently, December is the cheapest month in which you can book a flight from Seattle to Portugal (average of $597). Flying from Seattle to Portugal in June is currently the most expensive (average of $1,194). 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

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Top 10 airlines flying from Seattle to Portugal

Discover the top 10 airlines that operate flights from Seattle to Portugal. 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 2,784,634 searches. Data last updated May 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$455Average$952FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LufthansaCheapest$543Average$1,068FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest$544Average$843FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest$551Average$988FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest$581Average$1,061FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest$600Average$1,148FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$616Average$1,012FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest$645Average$1,058FlexibilityNo cancel feeOn-time76%
Search Finnair flights
DeltaCheapest$646Average$1,071FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air FranceCheapest$678Average$1,333FlexibilityNo cancel feeOn-time77%
Search Air France flights
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Search flights from Seattle to Portugal by cabin class

Find flights from Seattle to Portugal, 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 Seattle to Portugal?

When you search for this flight from Seattle to Portugal, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Portugal from Seattle.

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

Need flexible booking options for your flight to Portugal from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Not ready to book yet? You can track prices for flights from Seattle to Portugal on Cheapflights with our Price Alert feature and get notified when better prices are available.

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