What airlines fly to Portugal?

Delta, British Airways and United Airlines are the top three most popular airlines that fly to Portugal from Seattle according to our data. Delta is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 13 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Portugal?

WestJet, British Airways, and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Portugal

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Portugal?

Prices for flights from Seattle/Tacoma Intl Airport to Portugal were last updated today.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Portugal?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Portugal is 13 as of August 2026.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Portugal?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Portugal.

What documentation or ID do you need to fly to Portugal?

The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$213 Cheap Flights from Seattle to Portugal in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Portugal

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:35 pm - 12:50 pm

SEA

LIS

14h 15m

1 stop

11:35 am - 5:00 pm

LIS

SEA

13h 25m

1 stop

$707Icelandair

Sat, Jan 9 - Tue, Jan 19

2:35 pm - 12:50 pm

SEA

LIS

14h 15m

1 stop

2:00 pm - 5:00 pm

LIS

SEA

35h 00m

1 stop

$709Icelandair

Sat, Jan 9 - Thu, Jan 21

8:40 am - 9:20 am

SEA

LIS

16h 40m

2 stops

5:00 am - 6:22 pm

LIS

SEA

21h 22m

2 stops

$713Multiple Airlines

Tue, Nov 10 - Thu, Nov 26

8:40 am - 6:55 am

SEA

LIS

15h 15m

2 stops

5:00 am - 2:37 pm

LIS

SEA

17h 37m

2 stops

$716Multiple Airlines

Wed, Oct 28 - Wed, Nov 11

3:50 pm - 11:30 pm

SEA

LIS

24h 40m

1 stop

5:00 am - 12:00 pm

LIS

SEA

15h 00m

1 stop

$723Lufthansa

Wed, Oct 28 - Wed, Nov 11

2:50 pm - 1:30 pm

SEA

LIS

14h 40m

1 stop

5:00 am - 12:00 pm

LIS

SEA

15h 00m

1 stop

$732Lufthansa

Sun, Nov 8 - Wed, Nov 18

1:30 pm - 9:45 pm

SEA

LIS

24h 15m

1 stop

11:05 am - 10:00 pm

LIS

SEA

18h 55m

1 stop

$736British Airways

Tue, Nov 10 - Tue, Nov 17

7:05 pm - 10:40 am

SEA

LIS

31h 35m

2 stops

5:00 am - 9:57 pm

LIS

SEA

24h 57m

2 stops

$743Air Canada

Sun, Jan 10 - Fri, Jan 22

8:15 am - 10:40 am

SEA

LIS

18h 25m

2 stops

5:00 am - 2:37 pm

LIS

SEA

17h 37m

2 stops

$743Air Canada

Mon, Jan 11 - Tue, Jan 19

1:30 pm - 9:45 pm

SEA

LIS

24h 15m

1 stop

3:55 pm - 11:25 am

LIS

SEA

27h 30m

1 stop

$745British Airways

Tue, Nov 24 - Wed, Dec 2

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British Airways flights from Seattle to Portugal

Our best British Airways deals on Seattle to Portugal flight tickets

British Airways

Nov 24

SEA1:30 pmSeattle/Tacoma Intl

24h 15m

1 stop

LIS9:45 pmLisbon Humberto Delgado

Dec 2

LIS3:55 pmLisbon Humberto Delgado

27h 30m

1 stop

SEA11:25 amSeattle/Tacoma Intl

$745

British Airways

Nov 23

SEA6:45 pmSeattle/Tacoma Intl

35h 35m

1 stop

FNC2:20 pmFunchal Madeira

Dec 2

FNC3:10 pmFunchal Madeira

28h 15m

1 stop

SEA11:25 amSeattle/Tacoma Intl

$796

British Airways

Nov 24

SEA1:30 pmSeattle/Tacoma Intl

16h 50m

1 stop

FNC2:20 pmFunchal Madeira

Dec 2

FNC3:10 pmFunchal Madeira

33h 40m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

$798

Icelandair flights from Seattle to Portugal

Our best Icelandair deals on Seattle to Portugal flight tickets

Icelandair

Jan 9

SEA2:35 pmSeattle/Tacoma Intl

14h 15m

1 stop

LIS12:50 pmLisbon Humberto Delgado

Jan 19

LIS11:35 amLisbon Humberto Delgado

13h 25m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$707

Icelandair

Jan 9

SEA2:35 pmSeattle/Tacoma Intl

14h 15m

1 stop

LIS12:50 pmLisbon Humberto Delgado

Jan 21

LIS2:00 pmLisbon Humberto Delgado

35h 00m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$709

Icelandair

Jan 16

SEA2:35 pmSeattle/Tacoma Intl

14h 15m

1 stop

LIS12:50 pmLisbon Humberto Delgado

Jan 31

LIS2:00 pmLisbon Humberto Delgado

35h 00m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$714

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 1/9

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Tue 1/19

11:35 am-5:00 pm

1 stop13h 25m

$707

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 1/9

2:35 pm-12:50 pm

1 stop14h 15m

Lisbon Humberto Delgado

Thu 1/21

2:00 pm-5:00 pm

1 stop35h 00m

$709

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 11/10

8:40 am-9:20 am

2 stops16h 40m

Lisbon Humberto Delgado

Thu 11/26

5:00 am-6:22 pm

2 stops21h 22m

$713

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 10/28

8:40 am-6:55 am

2 stops15h 15m

Lisbon Humberto Delgado

Wed 11/11

5:00 am-2:37 pm

2 stops17h 37m

$716

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 10/28

3:50 pm-11:30 pm

1 stop24h 40m

Lisbon Humberto Delgado

Wed 11/11

5:00 am-12:00 pm

1 stop15h 00m

$723

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 11/8

2:50 pm-1:30 pm

1 stop14h 40m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-12:00 pm

1 stop15h 00m

$732

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 11/10

1:30 pm-9:45 pm

1 stop24h 15m

Lisbon Humberto Delgado

Tue 11/17

11:05 am-10:00 pm

1 stop18h 55m

$736

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 1/10

7:05 pm-10:40 am

2 stops31h 35m

Lisbon Humberto Delgado

Fri 1/22

5:00 am-9:57 pm

2 stops24h 57m

$743

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 1/11

8:15 am-10:40 am

2 stops18h 25m

Lisbon Humberto Delgado

Tue 1/19

5:00 am-2:37 pm

2 stops17h 37m

$743

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 11/24

1:30 pm-9:45 pm

1 stop24h 15m

Lisbon Humberto Delgado

Wed 12/2

3:55 pm-11:25 am

1 stop27h 30m

$745

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Seattle is in January. Flight prices, which tend to average around $488, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from Seattle during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $578.

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

You are more likely to see cheaper flights to Portugal from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $843 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Seattle for as low as $728 on momondo.

Can stopping save me money on Seattle to Portugal flights?

You could potentially save up to 26% on your flight if you consider stops on a Seattle to Portugal flight.

Cheap Seattle to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Portugal

Fastest flight time	14h 05m
Direct flights	None

The fastest flight from Seattle to Portugal takes 14h 05m

There are no direct flights from Seattle to Portugal. There are no popular flight routes from Seattle to Portugal.

Search flight deals

Frequently asked questions about flying from Seattle to Portugal

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Portugal?
Prices for flights from Seattle/Tacoma Intl Airport to Portugal were last updated today.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Portugal?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Portugal is 13 as of August 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Portugal?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Portugal.
What documentation or ID do you need to fly to Portugal?
The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Seattle to Portugal

Compare and see reviews for airlines that fly from Seattle to Portugal with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $348	Free Cancellation	Rating 7.0 719 reviews	Search Icelandair flights
Lufthansa	PriceFrom $475	Free Cancellation	Rating 6.8 8,174 reviews	Search Lufthansa flights
KLM	PriceFrom $481	Free Cancellation	Rating 7.8 1,552 reviews	Search KLM flights
British Airways	PriceFrom $482	Free Cancellation	Rating 6.7 8,140 reviews	Search British Airways flights
United Airlines	PriceFrom $488	Free Cancellation	Rating 7.4 10,062 reviews	Search United Airlines flights
American Airlines	PriceFrom $497	Free Cancellation	Rating 7.1 11,845 reviews	Search American Airlines flights
Air France	PriceFrom $505	Free Cancellation	Rating 7.5 1,633 reviews	Search Air France flights
Aer Lingus	PriceFrom $523	Free Cancellation	Rating 7.3 1,684 reviews	Search Aer Lingus flights
Air Canada	PriceFrom $543	Free Cancellation	Rating 7.1 11,419 reviews	Search Air Canada flights
Delta	PriceFrom $550	Free Cancellation	Rating 7.8 8,494 reviews	Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Portugal?

It is quick and easy to find Seattle to Portugal flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Portugal that suits you.

Can I find flights from Seattle to Portugal with flexible booking policies on momondo?

All flight searches from Seattle to Portugal on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Portugal?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Portugal.

I’m not ready to book a flight from Seattle to Portugal right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Seattle and alert you when they change.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Popular cities

Other flights from Seattle

Other flights to Portugal

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $429

Flights to Portofrom $523

Flights to Funchalfrom $546

Flights to Farofrom $344

Flights to Ponta Delgadafrom $438

Flights to Lajesfrom $461

Flights to Hortafrom $490

Flights to Pico Islandfrom $451

Flights to Porto Santofrom $904

Flights to Velasfrom $471

Cheap flights from Seattle to Portugal from $213

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Portugal departing on 11/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Seattle to Portugal

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Big names and deals

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British Airways flights from Seattle to Portugal

Our best British Airways deals on Seattle to Portugal flight tickets

Icelandair flights from Seattle to Portugal

Our best Icelandair deals on Seattle to Portugal flight tickets

momondo Fare Finder

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

See travel insights to Portugal from

How to get the cheapest flight ticket from Seattle to Portugal

What is the cheapest month to fly to Portugal?

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

Can stopping save me money on Seattle to Portugal flights?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Portugal?

What airlines fly to Portugal?

Cheap Seattle to Portugal flight deals and tips

Fastest flight time

Direct flights

Frequently asked questions about flying from Seattle to Portugal

Best airlines flying from Seattle to Portugal

Compare and see reviews for airlines that fly from Seattle to Portugal with momondo

Why use momondo?

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Seattle flight routes

According to popular flight searches on momondo this year

Portugal flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Portugal

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Portugal

List of cabin classes available on flights landing in Portugal. Availability may vary depending on flight origin and airline.

Complete your trip to Portugal

Explore popular destinations other users love

According to popular flight searches on momondo this year