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

British Airways, at £401, was found to be the cheapest airline from Seattle to Lisbon.Alternate airlines flying return to your destination include United Airlines and Lufthansa. British Airways is priced at 43% 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 £289 on Icelandair. Other airlines that offer cheap prices include United Airlines from £339 and TAP AIR PORTUGAL from £363 one-way.

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.

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).

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

Travelers have found it’s best to book a flight 30 days in advance to save up to 45% 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 30 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 £552, or £715 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 £412.

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.

£289+ Flights from Seattle to Lisbon

Cheap flight deals from Seattle to Lisbon

Round-trip from	£401
One-way from	£289
Popular in	June
Cheapest in	January
Average price	£771

British Airways
28/10-11/11
2 total stops
33h 29m total
Seattle to Lisbon

Search Deals

Icelandair
9/8
1 total stop
13h 50m total
Seattle to Lisbon

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£109 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 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 11 July 2025.

Tue 28/1019:50SEA - LIS

1 stop14h 50mBritish Airways

Tue 11/1111:10LIS - SEA

1 stop18h 39mBritish Airways

Deal found 9/7£401

Sat 25/1008:00SEA - LIS

1 stop19h 15mUnited Airlines

Sat 1/1110:15LIS - SEA

2 stops31h 38mUnited Airlines

Deal found 9/7£405

Tue 28/1015:00SEA - LIS

1 stop16h 30mLufthansa

Mon 10/1105:00LIS - SEA

1 stop15h 10mLufthansa

Deal found 9/7£405

Tue 28/1012:03SEA - LIS

1 stop14h 12mMultiple Airlines

Sat 8/1110:30LIS - SEA

1 stop19h 19mMultiple Airlines

Deal found 10/7£442

Mon 27/1015:37SEA - LIS

2 stops39h 58mSWISS

Mon 10/1115:25LIS - SEA

2 stops39h 50mSWISS

Deal found 9/7£464

Wed 20/815:45SEA - LIS

1 stop21h 35mIcelandair

Thu 4/922:20LIS - SEA

1 stop21h 05mIcelandair

Deal found 9/7£467

Mon 8/919:10SEA - LIS

1 stop20h 25mTurkish Airlines

Wed 17/916:30LIS - SEA

1 stop26h 05mTurkish Airlines

Deal found 10/7£524

Tue 11/1107:20SEA - LIS

2 stops24h 45mScandinavian Airlines

Fri 14/1106:55LIS - SEA

2 stops23h 28mScandinavian Airlines

Deal found 10/7£574

Sun 21/911:15SEA - LIS

2 stops22h 35mDelta

Mon 6/1012:10LIS - SEA

1 stop31h 05mDelta

Deal found 9/7£589

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 11 July 2025.

Tue 28/1019:50SEA - LIS

1 stop14h 50mBritish Airways

Tue 11/1111:10LIS - SEA

1 stop18h 39mBritish Airways

Deal found 9/7£401

Sat 25/1008:00SEA - LIS

1 stop19h 15mUnited Airlines

Sat 1/1110:15LIS - SEA

2 stops31h 38mUnited Airlines

Deal found 9/7£405

Tue 28/1015:00SEA - LIS

1 stop16h 30mLufthansa

Mon 10/1105:00LIS - SEA

1 stop15h 10mLufthansa

Deal found 9/7£405

Tue 28/1012:03SEA - LIS

1 stop14h 12mMultiple Airlines

Sat 8/1110:30LIS - SEA

1 stop19h 19mMultiple Airlines

Deal found 10/7£442

Mon 27/1015:37SEA - LIS

2 stops39h 58mSWISS

Mon 10/1115:25LIS - SEA

2 stops39h 50mSWISS

Deal found 9/7£464

Wed 20/815:45SEA - LIS

1 stop21h 35mIcelandair

Thu 4/922:20LIS - SEA

1 stop21h 05mIcelandair

Deal found 9/7£467

Mon 8/919:10SEA - LIS

1 stop20h 25mTurkish Airlines

Wed 17/916:30LIS - SEA

1 stop26h 05mTurkish Airlines

Deal found 10/7£524

Tue 11/1107:20SEA - LIS

2 stops24h 45mScandinavian Airlines

Fri 14/1106:55LIS - SEA

2 stops23h 28mScandinavian Airlines

Deal found 10/7£574

Sun 21/911:15SEA - LIS

2 stops22h 35mDelta

Mon 6/1012:10LIS - SEA

1 stop31h 05mDelta

Deal found 9/7£589

Last-minute flights from Seattle to Lisbon
Discover last-minute flight deals from Seattle to Lisbon. Data last updated 11 July 2025 and is based on user searches.

Mon 21/707:20SEA - LIS

1 stop18h 00mUnited Airlines

Mon 4/812:15LIS - SEA

1 stop31h 40mUnited Airlines

Deal found 9/7£1,177

Thu 14/807:45SEA - LIS

1 stop19h 00mDelta

Thu 21/809:50LIS - SEA

1 stop15h 45mDelta

Deal found 8/7£617

Mon 18/819:10SEA - LIS

1 stop30h 45mTurkish Airlines

Tue 9/905:55LIS - SEA

1 stop19h 20mTurkish Airlines

Deal found 9/7£531

Mon 18/807:20SEA - LIS

1 stop18h 00mUnited Airlines

Tue 9/911:25LIS - SEA

2 stops32h 06mUnited Airlines

Deal found 9/7£543

Wed 20/815:45SEA - LIS

1 stop21h 35mIcelandair

Thu 4/922:20LIS - SEA

1 stop21h 05mIcelandair

Deal found 9/7£467

Wed 20/810:00SEA - LIS

2 stops17h 05mLufthansa

Thu 4/911:25LIS - SEA

2 stops42h 51mLufthansa

Deal found 9/7£557

Wed 20/813:45SEA - LIS

2 stops17h 00mSWISS

Mon 8/915:45LIS - SEA

2 stops34h 51mSWISS

Deal found 9/7£567

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 11 July 2025.

Sat 9/823:30SEA - LIS

1 stop13h 50mIcelandair

Deal found 10/7£289

Tue 14/1008:42SEA - LIS

3 stops23h 48mUnited Airlines

Deal found 10/7£339

Sun 28/911:30SEA - LIS

1 stop14h 20mTAP AIR PORTUGAL

Deal found 10/7£363

Sun 28/910:00SEA - LIS

2 stops15h 20mLufthansa

Deal found 10/7£418

Tue 12/800:20SEA - LIS

2 stops25h 35mMultiple Airlines

Deal found 10/7£3,010

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

Tue 28/10

19:50-17:40

1 stop14h 50m

Lisbon Humberto Delgado

Tue 11/11

11:10-21:49

1 stop18h 39m

£401

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 25/10

08:00-11:15

1 stop19h 15m

Lisbon Humberto Delgado

Sat 1/11

10:15-10:53

2 stops31h 38m

£405

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 28/10

15:00-14:30

1 stop16h 30m

Lisbon Humberto Delgado

Mon 10/11

05:00-12:10

1 stop15h 10m

£405

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 28/10

12:03-09:15

1 stop14h 12m

Lisbon Humberto Delgado

Sat 8/11

10:30-21:49

1 stop19h 19m

£442

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 27/10

15:37-14:35

2 stops39h 58m

Lisbon Humberto Delgado

Mon 10/11

15:25-23:15

2 stops39h 50m

£464

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 20/8

15:45-21:20

1 stop21h 35m

Lisbon Humberto Delgado

Thu 4/9

22:20-11:25

1 stop21h 05m

£467

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 8/9

19:10-23:35

1 stop20h 25m

Lisbon Humberto Delgado

Wed 17/9

16:30-10:35

1 stop26h 05m

£524

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 11/11

07:20-16:05

2 stops24h 45m

Lisbon Humberto Delgado

Fri 14/11

06:55-22:23

2 stops23h 28m

£574

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 21/9

11:15-17:50

2 stops22h 35m

Lisbon Humberto Delgado

Mon 6/10

12:10-11:15

1 stop31h 05m

£589

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 9/8

23:30-21:20

1 stop13h 50m

£289

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 14 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 29 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.

Reviews of airlines servicing Lisbon

See what other customers who have flown with Delta, SWISS, andUnited Airlines from Seattle to Lisbon 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

7,951 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

7,951 reviews

Delta

8.0

Very Good

7,951 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

1,655 reviews

Delta

8.0

Very Good

7,951 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

8,848 reviews

Delta

8.0

Very Good

7,951 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

3,896 reviews

Delta

8.0

Very Good

7,951 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

1,419 reviews

Delta

8.0

Very Good

7,951 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?
British Airways, at £401, was found to be the cheapest airline from Seattle to Lisbon.Alternate airlines flying return to your destination include United Airlines and Lufthansa. British Airways is priced at 43% 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 £289 on Icelandair. Other airlines that offer cheap prices include United Airlines from £339 and TAP AIR PORTUGAL from £363 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

Madeira

Setúbal

Fátima

Almada

Estoril

Sintra

Oeiras

Costa da Caparica

Beja

Nazaré

Peniche

Sesimbra

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Lisbon Humberto Delgado Airport car hire

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 £289

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 9/8. 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 11 July 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 11 July 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 27 June 2025.

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

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 11 July 2025.

See what other customers who have flown with Delta, SWISS, andUnited Airlines from Seattle to Lisbon have to say. 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 11 July 2025.