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

Scandinavian Airlines, at £543, was found to be the cheapest airline from Seattle to Lisbon.Alternate airlines flying return to your destination include United Airlines and British Airways. Scandinavian Airlines is priced at 26% lower than the current average price of a flight leaving 3 months from now.

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

One-way options have recently been found by users for as low as £430 on United Airlines. Other airlines that offer cheap prices include Air Europa from £594 and Turkish Airlines from £776 one-way.

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

Travelers have found it’s best to book a flight 18 days in advance to save up to 37% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 18 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Seattle to Lisbon 1-2 weeks in advance for as low as £568, or £844 for flights within the next 24 hours.

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

Flights from Seattle to Lisbon lean towards being more expensive in June. Prices are generally better when you fly from Seattle to Lisbon in January, with the cheapest ticket starting at £450.

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

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

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

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

How can I find direct flights from Seattle to Lisbon?

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

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

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

£430+ Flights from Seattle to Lisbon

Cheap flight deals from Seattle to Lisbon

Round-trip from	£543
One-way from	£430
Popular in	June
Cheapest in	January
Average price	£816

Scandinavian Airlines
1/10-15/10
4 total stops
81h 44m total
Seattle to Lisbon

Search Deals

United Airlines
1/10
1 total stop
18h 00m total
Seattle to Lisbon

Search Deals

Highest demand for flights based on searches. 16% potential increase in price (£113 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).

Search Deals

Average for round-trip flights in May 2025

Search Deals

Find flight deals from Seattle to Lisbon

Cheapest flights from Seattle to Lisbon
Explore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 May 2025.

Wed 1/1015:20SEA - LIS

2 stops57h 35mScandinavian Airlines

Wed 15/1007:15LIS - SEA

2 stops24h 09mScandinavian Airlines

Deal found 12/5£543

Tue 5/807:20SEA - LIS

1 stop18h 00mUnited Airlines

Tue 19/811:25LIS - SEA

2 stops32h 06mUnited Airlines

Deal found 13/5£557

Wed 1/1013:30SEA - LIS

1 stop25h 40mBritish Airways

Tue 14/1011:05LIS - SEA

1 stop18h 39mBritish Airways

Deal found 12/5£577

Tue 23/913:45SEA - LIS

2 stops25h 35mSWISS

Mon 6/1015:35LIS - SEA

2 stops35h 01mSWISS

Deal found 11/5£582

Wed 17/910:00SEA - LIS

2 stops28h 05mLufthansa

Mon 29/907:30LIS - SEA

1 stop36h 25mLufthansa

Deal found 11/5£605

Mon 4/819:10SEA - LIS

1 stop30h 45mTurkish Airlines

Tue 12/810:55LIS - SEA

1 stop38h 20mTurkish Airlines

Deal found 12/5£611

Sat 26/719:00SEA - LIS

1 stop18h 20mIcelandair

Sun 3/822:20LIS - SEA

1 stop21h 05mIcelandair

Deal found 12/5£633

Tue 11/1101:24SEA - LIS

2 stops36h 26mMultiple Airlines

Tue 18/1110:40LIS - SEA

2 stops20h 35mMultiple Airlines

Deal found 12/5£642

Sat 13/923:05SEA - LIS

2 stops27h 40mDelta

Wed 24/912:45LIS - SEA

1 stop17h 28mDelta

Deal found 11/5£679

Best flights from Seattle to Lisbon
Discover carefully curated flight deals from Seattle to Lisbon that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 May 2025.

Wed 1/1015:20SEA - LIS

2 stops57h 35mScandinavian Airlines

Wed 15/1007:15LIS - SEA

2 stops24h 09mScandinavian Airlines

Deal found 12/5£543

Tue 5/807:20SEA - LIS

1 stop18h 00mUnited Airlines

Tue 19/811:25LIS - SEA

2 stops32h 06mUnited Airlines

Deal found 13/5£557

Wed 1/1013:30SEA - LIS

1 stop25h 40mBritish Airways

Tue 14/1011:05LIS - SEA

1 stop18h 39mBritish Airways

Deal found 12/5£577

Tue 23/913:45SEA - LIS

2 stops25h 35mSWISS

Mon 6/1015:35LIS - SEA

2 stops35h 01mSWISS

Deal found 11/5£582

Wed 17/910:00SEA - LIS

2 stops28h 05mLufthansa

Mon 29/907:30LIS - SEA

1 stop36h 25mLufthansa

Deal found 11/5£605

Mon 4/819:10SEA - LIS

1 stop30h 45mTurkish Airlines

Tue 12/810:55LIS - SEA

1 stop38h 20mTurkish Airlines

Deal found 12/5£611

Sat 13/919:00SEA - LIS

1 stop18h 20mIcelandair

Thu 25/922:20LIS - SEA

1 stop30h 20mIcelandair

Deal found 11/5£613

Sat 13/921:20SEA - LIS

2 stops26h 40mDelta

Wed 1/1012:45LIS - SEA

1 stop17h 28mDelta

Deal found 11/5£679

Wed 17/907:05SEA - LIS

3 stops43h 25mMultiple Airlines

Sat 27/915:35LIS - SEA

2 stops35h 01mMultiple Airlines

Deal found 12/5£738

Last-minute flights from Seattle to Lisbon
Discover last-minute flight deals from Seattle to Lisbon. Data last updated 13 May 2025 and is based on user searches.

Fri 16/511:55SEA - LIS

2 stops37h 20mScandinavian Airlines

Fri 23/508:00LIS - SEA

2 stops37h 50mScandinavian Airlines

Deal found 12/5£712

Fri 16/522:40SEA - LIS

2 stops35h 00mRoyal Air Maroc

Mon 2/618:40LIS - SEA

2 stops34h 14mRoyal Air Maroc

Deal found 11/5£1,607

Sat 17/513:50SEA - LIS

2 stops17h 00mWestJet

Mon 2/605:40LIS - SEA

2 stops22h 48mWestJet

Deal found 11/5£2,817

Sun 18/516:00SEA - LIS

2 stops22h 05mMultiple Airlines

Mon 26/505:05LIS - SEA

1 stop18h 00mMultiple Airlines

Deal found 11/5£999

Mon 19/519:10SEA - LIS

1 stop36h 20mTurkish Airlines

Fri 6/616:30LIS - SEA

1 stop32h 45mTurkish Airlines

Deal found 11/5£1,028

Mon 19/512:45SEA - LIS

2 stops25h 40mSWISS

Mon 26/512:35LIS - SEA

2 stops37h 58mSWISS

Deal found 12/5£1,533

Tue 20/522:50SEA - LIS

2 stops38h 30mIcelandair

Thu 5/622:20LIS - SEA

1 stop21h 05mIcelandair

Deal found 11/5£1,012

Thu 22/513:49SEA - LIS

2 stops35h 31mUnited Airlines

Thu 5/611:25LIS - SEA

2 stops34h 03mUnited Airlines

Deal found 12/5£2,777

Fri 30/510:53SEA - LIS

2 stops19h 52mSWISS

Mon 2/615:35LIS - SEA

2 stops34h 58mSWISS

Deal found 12/5£832

Sat 21/611:23SEA - LIS

2 stops19h 12mDelta

Sat 12/705:40LIS - SEA

2 stops21h 07mDelta

Deal found 11/5£2,162

Wed 25/611:35SEA - LIS

1 stop15h 30mUnited Airlines

Tue 8/705:05LIS - SEA

2 stops21h 31mUnited Airlines

Deal found 11/5£761

Mon 30/600:20SEA - LIS

2 stops26h 10mMultiple Airlines

Tue 15/711:25LIS - SEA

2 stops31h 45mMultiple Airlines

Deal found 12/5£828

One-way flights from Seattle to Lisbon
Search for one-way flight options from Seattle to Lisbon. Find affordable one-way fares based on user searches. Data last updated 13 May 2025.

Wed 1/1007:20SEA - LIS

1 stop18h 00mUnited Airlines

Deal found 12/5£430

Mon 8/911:30SEA - LIS

1 stop14h 40mMultiple Airlines

Deal found 12/5£475

Tue 10/607:20SEA - LIS

2 stops23h 55mAir Europa

Deal found 12/5£594

Thu 22/512:35SEA - LIS

2 stops61h 20mTurkish Airlines

Deal found 12/5£776

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 1/10

15:20-08:55

2 stops57h 35m

Lisbon Humberto Delgado

Wed 15/10

07:15-23:24

2 stops24h 09m

£543

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 5/8

07:20-09:20

1 stop18h 00m

Lisbon Humberto Delgado

Tue 19/8

11:25-11:31

2 stops32h 06m

£557

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 1/10

13:30-23:10

1 stop25h 40m

Lisbon Humberto Delgado

Tue 14/10

11:05-21:44

1 stop18h 39m

£577

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 23/9

13:45-23:20

2 stops25h 35m

Lisbon Humberto Delgado

Mon 6/10

15:35-18:36

2 stops35h 01m

£582

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 17/9

10:00-22:05

2 stops28h 05m

Lisbon Humberto Delgado

Mon 29/9

07:30-11:55

1 stop36h 25m

£605

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 4/8

19:10-09:55

1 stop30h 45m

Lisbon Humberto Delgado

Tue 12/8

10:55-17:15

1 stop38h 20m

£611

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 13/9

19:00-21:20

1 stop18h 20m

Lisbon Humberto Delgado

Thu 25/9

22:20-20:40

1 stop30h 20m

£613

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 13/9

23:05-10:45

2 stops27h 40m

Lisbon Humberto Delgado

Tue 30/9

10:00-09:14

2 stops31h 14m

£679

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 17/9

07:05-10:30

3 stops43h 25m

Lisbon Humberto Delgado

Sat 27/9

15:35-18:36

2 stops35h 01m

£738

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 1/10

07:20-09:20

1 stop18h 00m

£430

Flights are sorted by cheapest return flights first.

Deals found on 12/5

Showing 1-10 of 13 results

Best time to book a flight from Seattle to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Seattle with our price prediction graph.

Estimated return 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Lisbon

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

The price you pay for your flight from Seattle to Lisbon may vary depending on when you book. For the best chance of a lower fare, look to book 17 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of £101). Flying from Seattle to Lisbon in August is currently the most expensive (average of £274). 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.

Rainfall in Lisbon by month

In terms of precipitation, rainfall in Lisbon ranges from 6.0 - 122.0 inches per month. December is typically the wettest month, when rainfall can reach 122.0 mm. July is typically the driest time to visit Lisbon when rainfall is around 6.0 mm.

Temperature in Lisbon by month

If weather is an important factor for your trip to Lisbon, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing Lisbon

Read reviews from past customers who have flown Delta, SWISS and United Airlines from Seattle to Lisbon. 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

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,950 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

SWISS

7.5

Good

1,593 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,724 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Turkish Airlines

7.3

Good

3,795 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Scandinavian Airlines

7.3

Good

1,358 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Seattle to Lisbon round-trip?
Scandinavian Airlines, at £543, was found to be the cheapest airline from Seattle to Lisbon.Alternate airlines flying return to your destination include United Airlines and British Airways. Scandinavian Airlines is priced at 26% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Seattle to Lisbon one-way?
One-way options have recently been found by users for as low as £430 on United Airlines. Other airlines that offer cheap prices include Air Europa from £594 and Turkish Airlines from £776 one-way.
Can I find deals for flights from Seattle to Lisbon that include hotel bookings?
Yes. In addition to deals on Seattle to Lisbon flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Seattle to Lisbon?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Lisbon.
Can I find deals for business class flights from Seattle to Lisbon?
Yes. Cheapflights offers flight deals from Seattle to Lisbon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Seattle to Lisbon?
Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of £101). Flying from Seattle to Lisbon in August is currently the most expensive (average of £274). 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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Fátima

Almada

Costa da Caparica

Sintra

Oeiras

Estoril

Nazaré

Beja

Peniche

Sesimbra

Figueira da Foz

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Ponta Delgada car hire

Angra do Heroísmo car hire

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

Cheapflights helps you search for flights from Seattle to Lisbon via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Lisbon.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Lisbon, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Seattle to Lisbon 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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Cheap flights from Seattle to Lisbon from £430

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Seattle to Lisbon

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Seattle to Lisbon

Cheapest flights from Seattle to LisbonExplore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 May 2025.

Explore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 May 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

Best time to book a flight from Seattle to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Seattle with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Lisbon

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

Use this chart to determine the optimal time to book a return flight from Seattle to Lisbon. Price data was last updated on 9 May 2025.

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

Rainfall in Lisbon by month

Plan your trip to Lisbon by taking into account the average rainfall totals by month.

Temperature in Lisbon by month

Plan your trip to Lisbon by taking into account the average temperature totals by month.

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. 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 Lisbon. Reviews last updated 13 May 2025.

Read reviews from past customers who have flown Delta, SWISS and United Airlines from Seattle to Lisbon. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

How can I find direct flights from Seattle to Lisbon?

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

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

Travelling to a place near Seattle?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Complete your trip

Complete your trip to Lisbon by adding a car hire and/or hotel booking to your travel itinerary.

Fly with Cheapflights

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

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

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

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

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

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Cheapest flights from Seattle to Lisbon
Explore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 May 2025.