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

United Airlines, at £567, was found to be the cheapest airline from Seattle to Lisbon.Alternate airlines flying return to your destination include Delta and Icelandair. United Airlines is priced at 31% 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 £379 on United Airlines. Other airlines that offer cheap prices include Lufthansa from £409 and Delta from £1,177 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 16 days in advance to save up to 29% 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 16 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 £752, or £802 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 February, with the cheapest ticket starting at £478.

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.

£379+ Flights from Seattle to Lisbon

Cheap flight deals from Seattle to Lisbon

Round-trip from	£567
One-way from	£379
Popular in	June
Cheapest in	February
Average price	£620

United Airlines
22/4-6/5
4 total stops
76h 01m total
Seattle to Lisbon

Search Deals

United Airlines
12/2
2 total stops
18h 00m total
Seattle to Lisbon

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£158 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£23 potential savings vs. average return price).

Search Deals

Average for round-trip flights in January 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 30 January 2025.

Tue 22/412:46SEA - LIS

2 stops36h 34mUnited Airlines

Tue 6/511:25LIS - SEA

2 stops39h 27mUnited Airlines

Deal found 28/1£567

Sun 9/307:15SEA - LIS

2 stops20h 20mDelta

Mon 17/305:00LIS - SEA

1 stop14h 40mDelta

Deal found 29/1£568

Sun 9/315:35SEA - LIS

1 stop21h 45mIcelandair

Fri 14/321:20LIS - SEA

1 stop27h 40mIcelandair

Deal found 30/1£580

Wed 26/1118:50SEA - LIS

1 stop19h 00mMultiple Airlines

Tue 9/1211:10LIS - SEA

1 stop18h 46mMultiple Airlines

Deal found 29/1£586

Mon 17/320:00SEA - LIS

1 stop36h 00mTurkish Airlines

Mon 24/311:35LIS - SEA

1 stop37h 30mTurkish Airlines

Deal found 29/1£612

Thu 17/420:20SEA - LIS

1 stop29h 45mBritish Airways

Sat 26/418:55LIS - SEA

1 stop24h 35mBritish Airways

Deal found 28/1£618

Tue 18/316:10SEA - LIS

1 stop23h 20mLufthansa

Fri 28/306:10LIS - SEA

1 stop15h 10mLufthansa

Deal found 29/1£642

Thu 20/315:15SEA - LIS

1 stop20h 30mKLM

Thu 27/310:00LIS - SEA

1 stop19h 25mKLM

Deal found 30/1£658

Fri 7/312:55SEA - LIS

2 stops41h 40mSWISS

Mon 31/315:35LIS - SEA

2 stops35h 26mSWISS

Deal found 29/1£714

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 30 January 2025.

Tue 22/412:46SEA - LIS

2 stops36h 34mUnited Airlines

Tue 6/511:25LIS - SEA

2 stops39h 27mUnited Airlines

Deal found 28/1£567

Sun 9/307:15SEA - LIS

2 stops20h 20mDelta

Mon 17/305:00LIS - SEA

1 stop14h 40mDelta

Deal found 29/1£568

Sun 9/315:35SEA - LIS

1 stop21h 45mIcelandair

Fri 14/321:20LIS - SEA

1 stop27h 40mIcelandair

Deal found 30/1£580

Mon 17/320:00SEA - LIS

1 stop36h 00mTurkish Airlines

Mon 24/311:35LIS - SEA

1 stop37h 30mTurkish Airlines

Deal found 29/1£612

Sun 2/319:05SEA - LIS

2 stops30h 15mMultiple Airlines

Mon 10/314:10LIS - SEA

1 stop31h 10mMultiple Airlines

Deal found 29/1£613

Thu 17/420:20SEA - LIS

1 stop29h 45mBritish Airways

Sat 26/418:55LIS - SEA

1 stop24h 35mBritish Airways

Deal found 28/1£618

Tue 18/316:10SEA - LIS

1 stop23h 20mLufthansa

Fri 28/306:10LIS - SEA

1 stop15h 10mLufthansa

Deal found 29/1£642

Thu 20/315:15SEA - LIS

1 stop20h 30mKLM

Thu 27/310:00LIS - SEA

1 stop19h 25mKLM

Deal found 30/1£658

Fri 7/312:55SEA - LIS

2 stops41h 40mSWISS

Mon 31/315:35LIS - SEA

2 stops35h 26mSWISS

Deal found 29/1£714

Last-minute flights from Seattle to Lisbon
Discover last-minute flight deals from Seattle to Lisbon. Data last updated 30 January 2025 and is based on user searches.

Sun 9/214:35SEA - LIS

2 stops20h 40mIcelandair

Mon 24/221:20LIS - SEA

1 stop27h 40mIcelandair

Deal found 29/1£651

Sun 9/219:00SEA - LIS

1 stop31h 05mTurkish Airlines

Sun 16/211:35LIS - SEA

1 stop37h 30mTurkish Airlines

Deal found 29/1£772

Sun 9/206:05SEA - LIS

1 stop19h 15mUnited Airlines

Fri 21/206:10LIS - SEA

1 stop15h 10mUnited Airlines

Deal found 29/1£830

Sun 9/206:00SEA - LIS

2 stops18h 00mVirgin Atlantic

Mon 24/211:15LIS - SEA

2 stops19h 10mVirgin Atlantic

Deal found 29/1£912

Sun 9/214:09SEA - LIS

1 stop16h 26mDelta

Sat 22/211:25LIS - SEA

1 stop32h 21mDelta

Deal found 29/1£991

Mon 10/219:00SEA - LIS

1 stop36h 00mTurkish Airlines

Tue 18/216:00LIS - SEA

1 stop33h 05mTurkish Airlines

Deal found 29/1£740

Tue 11/215:10SEA - LIS

1 stop14h 10mLufthansa

Tue 18/206:10LIS - SEA

1 stop15h 10mLufthansa

Deal found 29/1£842

Sat 15/218:50SEA - LIS

1 stop19h 35mBritish Airways

Fri 21/218:45LIS - SEA

1 stop24h 35mBritish Airways

Deal found 29/1£1,105

Tue 18/215:04SEA - LIS

3 stops59h 11mUnited Airlines

Tue 18/311:55LIS - SEA

2 stops30h 54mUnited Airlines

Deal found 28/1£583

Tue 18/223:59SEA - LIS

2 stops31h 01mMultiple Airlines

Tue 18/316:00LIS - SEA

1 stop33h 05mMultiple Airlines

Deal found 29/1£705

Tue 18/207:10SEA - LIS

1 stop16h 50mKLM

Fri 21/205:00LIS - SEA

1 stop14h 46mKLM

Deal found 29/1£856

Thu 27/211:45SEA - LIS

2 stops21h 45mDelta

Sun 9/305:30LIS - SEA

2 stops22h 16mDelta

Deal found 29/1£575

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 30 January 2025.

Wed 12/206:10SEA - LIS

2 stops18h 00mUnited Airlines

Deal found 28/1£379

Thu 13/211:38SEA - LIS

3 stops38h 17mMultiple Airlines

Deal found 29/1£387

Fri 16/514:55SEA - LIS

2 stops36h 35mLufthansa

Deal found 29/1£409

Thu 15/517:10SEA - LIS

2 stops30h 50mDelta

Deal found 29/1£1,177

Find flights from Seattle to Lisbon within your budget

Fly from

Fly to

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 22/4

12:46-09:20

2 stops36h 34m

Lisbon Humberto Delgado

Tue 6/5

11:25-18:52

2 stops39h 27m

£567

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 9/3

07:15-10:35

2 stops20h 20m

Lisbon Humberto Delgado

Mon 17/3

05:00-12:40

1 stop14h 40m

£568

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 9/3

15:35-20:20

1 stop21h 45m

Lisbon Humberto Delgado

Fri 14/3

21:20-18:00

1 stop27h 40m

£580

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 17/3

20:00-15:00

1 stop36h 00m

Lisbon Humberto Delgado

Mon 24/3

11:35-18:05

1 stop37h 30m

£612

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 2/3

19:05-09:20

2 stops30h 15m

Lisbon Humberto Delgado

Mon 10/3

14:10-14:20

1 stop31h 10m

£613

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 17/4

20:20-10:05

1 stop29h 45m

Lisbon Humberto Delgado

Sat 26/4

18:55-11:30

1 stop24h 35m

£618

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 18/3

16:10-22:30

1 stop23h 20m

Lisbon Humberto Delgado

Fri 28/3

06:10-14:20

1 stop15h 10m

£642

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 20/3

15:15-18:45

1 stop20h 30m

Lisbon Humberto Delgado

Thu 27/3

10:00-22:25

1 stop19h 25m

£658

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 7/3

12:55-14:35

2 stops41h 40m

Lisbon Humberto Delgado

Mon 31/3

15:35-19:01

2 stops35h 26m

£714

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 12/2

06:10-08:10

2 stops18h 00m

£379

Flights are sorted by cheapest return flights first.

Deals found on 28/1

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.

Travel insights for flights from Seattle to Lisbon

Get recent, data-driven insights about flights from Seattle to Lisbon including ideal travel times, pricing trends, and more.

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 15 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.

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.

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, KLM and SWISS 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

8,456 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

8,456 reviews

Delta

8.0

Very Good

8,456 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,335 reviews

Delta

8.0

Very Good

8,456 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.5

Good

1,586 reviews

Delta

8.0

Very Good

8,456 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,916 reviews

Delta

8.0

Very Good

8,456 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Turkish Airlines

7.3

Good

3,909 reviews

Delta

8.0

Very Good

8,456 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines flying from Seattle to Lisbon round-trip?
United Airlines, at £567, was found to be the cheapest airline from Seattle to Lisbon.Alternate airlines flying return to your destination include Delta and Icelandair. United Airlines is priced at 31% 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 £379 on United Airlines. Other airlines that offer cheap prices include Lufthansa from £409 and Delta from £1,177 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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Costa da Caparica

Sintra

Almada

Oeiras

Nazaré

Sesimbra

Estoril

Beja

Peniche

Figueira da Foz

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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 £379

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 12/2. 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 30 January 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 30 January 2025.

Find flights from Seattle to Lisbon within your budget

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.

Travel insights for flights from Seattle to Lisbon

Get recent, data-driven insights about flights from Seattle to Lisbon including ideal travel times, pricing trends, and more.

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 24 January 2025.

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

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

Find hourly flight availability from Seattle to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 January 2025.

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

Read reviews from past customers who have flown Delta, KLM and SWISS 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 30 January 2025.