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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 10/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
3:40 pm - 1:50 pm
SEA
-
LIS
14h 10m
1 stop
Icelandair Logo
3:00 pm - 8:40 pm
LIS
-
SEA
13h 40m
1 stop
$611Icelandair
Mon, Sep 28 - Tue, Oct 20
Icelandair Logo
7:00 pm - 1:50 pm
SEA
-
LIS
34h 50m
1 stop
Icelandair Logo
3:00 pm - 5:55 pm
LIS
-
SEA
34h 55m
1 stop
$618Icelandair
Sun, Sep 27 - Thu, Oct 8
Air Canada Logo
10:30 am - 9:20 am
SEA
-
LIS
14h 50m
2 stops
Air Canada Logo
5:05 am - 2:22 pm
LIS
-
SEA
17h 17m
2 stops
$696Air Canada
Tue, Oct 13 - Tue, Oct 20
Air Canada Logo
7:20 pm - 7:00 am
SEA
-
OPO
27h 40m
2 stops
Air Canada Logo
11:50 am - 10:42 pm
OPO
-
SEA
18h 52m
2 stops
$766Air Canada
Mon, Oct 12 - Thu, Oct 22
British Airways Logo
8:20 pm - 7:30 pm
SEA
-
OPO
15h 10m
1 stop
British Airways Logo
8:40 pm - 12:35 am
OPO
-
SEA
34h 55m
2 stops
$787British Airways
Tue, Oct 13 - Tue, Oct 27
United Airlines Logo
10:58 pm - 8:05 am
SEA
-
FNC
25h 07m
1 stop
United Airlines Logo
9:40 am - 11:26 pm
FNC
-
SEA
21h 46m
2 stops
$882United Airlines
Mon, Aug 17 - Wed, Sep 2
United Airlines Logo
11:59 pm - 8:05 am
SEA
-
FNC
24h 06m
2 stops
United Airlines Logo
9:40 am - 11:26 pm
FNC
-
SEA
21h 46m
3 stops
$883United Airlines
Mon, Aug 17 - Wed, Sep 2
KLM Logo
2:35 pm - 1:50 pm
SEA
-
FAO
15h 15m
1 stop
KLM Logo
2:40 pm - 11:50 am
FAO
-
SEA
29h 10m
1 stop
$888KLM
Wed, Nov 11 - Mon, Nov 30
KLM Logo
11:15 am - 1:50 pm
SEA
-
FAO
18h 35m
2 stops
KLM Logo
2:40 pm - 11:50 am
FAO
-
SEA
29h 10m
1 stop
$892KLM
Wed, Nov 11 - Mon, Nov 30
British Airways Logo
1:30 pm - 6:35 pm
SEA
-
FNC
21h 05m
1 stop
British Airways Logo
3:10 pm - 12:25 pm
FNC
-
SEA
28h 15m
1 stop
$1,050British Airways
Mon, Aug 17 - Wed, Oct 28

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Delta flights from Seattle to Portugal

Our best Delta deals on Seattle to Portugal flight tickets
Delta
Sep 22
SEA6:45 pmSeattle/Tacoma Intl
15h 05m
1 stop
LIS5:50 pmLisbon Humberto Delgado
Oct 2
LIS5:00 amLisbon Humberto Delgado
19h 35m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$804
Delta
Oct 7
SEA6:45 pmSeattle/Tacoma Intl
19h 15m
1 stop
OPO10:00 pmPorto
Oct 14
OPO5:00 amPorto
14h 52m
1 stop
SEA11:52 amSeattle/Tacoma Intl
$836
Delta
Jan 10
SEA2:15 pmSeattle/Tacoma Intl
23h 45m
1 stop
OPO10:00 pmPorto
Jan 18
OPO5:00 amPorto
14h 50m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$852

Lufthansa flights from Seattle to Portugal

Our best Lufthansa deals on Seattle to Portugal flight tickets
Lufthansa
Oct 13
SEA6:50 pmSeattle/Tacoma Intl
19h 55m
1 stop
LIS10:45 pmLisbon Humberto Delgado
Oct 28
LIS5:00 amLisbon Humberto Delgado
15h 00m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
$772
Lufthansa
Oct 13
SEA2:10 pmSeattle/Tacoma Intl
17h 25m
1 stop
LIS3:35 pmLisbon Humberto Delgado
Oct 28
LIS6:10 amLisbon Humberto Delgado
14h 50m
1 stop
SEA2:00 pmSeattle/Tacoma Intl
$776
Lufthansa
Sep 27
SEA6:50 pmSeattle/Tacoma Intl
19h 55m
1 stop
LIS10:45 pmLisbon Humberto Delgado
Oct 8
LIS5:05 amLisbon Humberto Delgado
17h 17m
2 stops
SEA2:22 pmSeattle/Tacoma Intl
$801

momondo Fare Finder

 
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, momondo users made 832,500 searches. Data last updated July 17, 2026.
Use the filters below to find and compare flights from Seattle to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 9/28

3:40 pm-1:50 pm

1 stop14h 10m

Lisbon Humberto Delgado

Tue 10/20

3:00 pm-8:40 pm

1 stop13h 40m

$611

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 9/27

7:00 pm-1:50 pm

1 stop34h 50m

Lisbon Humberto Delgado

Thu 10/8

3:00 pm-5:55 pm

1 stop34h 55m

$618

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 10/13

10:30 am-9:20 am

2 stops14h 50m

Lisbon Humberto Delgado

Tue 10/20

5:05 am-2:22 pm

2 stops17h 17m

$696

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Mon 10/12

7:20 pm-7:00 am

2 stops27h 40m

Porto

Thu 10/22

11:50 am-10:42 pm

2 stops18h 52m

$766

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Tue 10/13

8:20 pm-7:30 pm

1 stop15h 10m

Porto

Tue 10/27

8:40 pm-12:35 am

2 stops34h 55m

$787

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Mon 8/17

10:58 pm-8:05 am

1 stop25h 07m

Funchal Madeira

Wed 9/2

9:40 am-11:26 pm

2 stops21h 46m

$882

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Mon 8/17

11:59 pm-8:05 am

2 stops24h 06m

Funchal Madeira

Wed 9/2

9:40 am-11:26 pm

3 stops21h 46m

$883

SeattleFaro

SEA - FAO

SEAFAO

Seattle/Tacoma Intl

Wed 11/11

2:35 pm-1:50 pm

1 stop15h 15m

Faro

Mon 11/30

2:40 pm-11:50 am

1 stop29h 10m

$888

SeattleFaro

SEA - FAO

SEAFAO

Seattle/Tacoma Intl

Wed 11/11

11:15 am-1:50 pm

2 stops18h 35m

Faro

Mon 11/30

2:40 pm-11:50 am

1 stop29h 10m

$892

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

Mon 8/17

1:30 pm-6:35 pm

1 stop21h 05m

Funchal Madeira

Wed 10/28

3:10 pm-12:25 pm

1 stop28h 15m

$1,050

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Portugal from

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

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 $571.

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 $840 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 $726 on momondo.

Can stopping save me money on Seattle to Portugal flights?

You could potentially save up to 16% 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

13h 01m

Direct flights

None
The fastest flight from Seattle to Portugal takes 13h 01m
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?

  • 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
IcelandairPriceFrom $348Free CancellationRating
7.0
710 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom $420Free CancellationRating
7.5
693 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $475Free CancellationRating
6.8
8,143 reviews
Search Lufthansa flights
KLMPriceFrom $481Free CancellationRating
7.8
1,541 reviews
Search KLM flights
British AirwaysPriceFrom $482Free CancellationRating
6.7
8,122 reviews
Search British Airways flights
United AirlinesPriceFrom $488Free CancellationRating
7.4
10,006 reviews
Search United Airlines flights
American AirlinesPriceFrom $497Free CancellationRating
7.1
11,828 reviews
Search American Airlines flights
Air FrancePriceFrom $505Free CancellationRating
7.5
1,626 reviews
Search Air France flights
Aer LingusPriceFrom $523Free CancellationRating
7.3
1,671 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
11,352 reviews
Search Air Canada 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

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Find better results for your trip to Portugal

Popular cities in Portugal

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