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Cheap flights from Portugal to Washington from $342

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to Washington departing on 11/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portugal to Washington

Recent round-trip flight deals from Portugal to Washington

Logo
6:25 am - 10:35 amLIS-SEA
36h 10m2 stops
Logo
7:00 am - 5:25 amSEA-LIS
14h 25m1 stop
$670
Find Deal
Tue, Nov 4 - Fri, Nov 14
Logo
9:05 am - 10:35 amLIS-SEA
33h 30m2 stops
Logo
10:05 am - 9:55 amSEA-LIS
15h 50m1 stop
$672
Find Deal
Thu, Nov 6 - Tue, Nov 11
Logo
1:15 pm - 10:35 amLIS-SEA
29h 20m2 stops
Logo
7:00 am - 5:25 amSEA-LIS
14h 25m1 stop
$676
Find Deal
Thu, Nov 6 - Fri, Nov 14
Delta Logo
5:00 am - 11:20 amLIS-PDX
14h 20m1 stop
Delta Logo
11:10 am - 11:20 amPDX-LIS
17h 10m2 stops
$746Delta
Find Deal
Wed, Sep 24 - Thu, Oct 30
Delta Logo
5:00 am - 5:10 pmLIS-PDX
20h 10m2 stops
Delta Logo
7:30 am - 2:50 pmPDX-LIS
23h 20m2 stops
$750Delta
Find Deal
Thu, Oct 2 - Thu, Oct 16
British Airways Logo
11:05 am - 9:50 pmLIS-SEA
18h 45m1 stop
British Airways Logo
11:40 am - 2:45 pmSEA-LIS
19h 05m2 stops
$753British Airways
Find Deal
Mon, Dec 15 - Thu, Jan 1
British Airways Logo
11:10 am - 9:50 pmLIS-SEA
18h 40m1 stop
British Airways Logo
6:50 pm - 9:50 amSEA-LIS
31h 00m1 stop
$755British Airways
Find Deal
Tue, Dec 16 - Sun, Dec 28
Air France Logo
5:30 am - 4:00 pmLIS-PDX
18h 30m2 stops
Air France Logo
10:05 am - 11:20 amPDX-LIS
17h 15m2 stops
$758Air France
Find Deal
Tue, Nov 25 - Wed, Dec 3
United Airlines Logo
12:20 pm - 8:20 pmLIS-PDX
16h 00m1 stop
United Airlines Logo
10:10 am - 8:20 amPDX-LIS
14h 10m1 stop
$863United Airlines
Find Deal
Fri, Sep 26 - Sun, Oct 12
United Airlines Logo
10:25 am - 9:15 pmLIS-PDX
18h 50m1 stop
United Airlines Logo
10:10 am - 8:20 amPDX-LIS
14h 10m1 stop
$866United Airlines
Find Deal
Fri, Sep 26 - Sun, Oct 12

Iberia flights from Portugal to State of Washington

Our best Iberia deals on Portugal to State of Washington flight tickets
Iberia
Dec 15
LIS6:30 amLisbon Humberto Delgado
22h 43m
2 stops
SEA9:13 pmSeattle/Tacoma Intl
Dec 31
SEA6:50 pmSeattle/Tacoma Intl
20h 35m
2 stops
LIS11:25 pmLisbon Humberto Delgado
$801
Find similar
Iberia
Nov 26
LIS6:30 amLisbon Humberto Delgado
36h 39m
2 stops
PDX11:09 amPortland
Dec 5
PDX7:59 amPortland
19h 51m
2 stops
LIS11:50 amLisbon Humberto Delgado
$833
Find similar
Iberia
Nov 26
LIS6:30 amLisbon Humberto Delgado
24h 29m
2 stops
PDX10:59 pmPortland
Nov 30
PDX5:45 pmPortland
29h 55m
2 stops
LIS7:40 amLisbon Humberto Delgado
$837
Find similar

British Airways flights from Portugal to State of Washington

Our best British Airways deals on Portugal to State of Washington flight tickets
British Airways
Dec 15
LIS11:05 amLisbon Humberto Delgado
18h 45m
1 stop
SEA9:50 pmSeattle/Tacoma Intl
Jan 1
SEA11:40 amSeattle/Tacoma Intl
19h 05m
2 stops
LIS2:45 pmLisbon Humberto Delgado
$753
Find similar
British Airways
Dec 16
LIS11:10 amLisbon Humberto Delgado
18h 40m
1 stop
SEA9:50 pmSeattle/Tacoma Intl
Dec 28
SEA6:50 pmSeattle/Tacoma Intl
31h 00m
1 stop
LIS9:50 amLisbon Humberto Delgado
$755
Find similar
British Airways
Nov 6
LIS10:55 amLisbon Humberto Delgado
19h 14m
1 stop
SEA10:09 pmSeattle/Tacoma Intl
Nov 22
SEA1:35 pmSeattle/Tacoma Intl
17h 15m
1 stop
LIS2:50 pmLisbon Humberto Delgado
$756
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portugal to State of Washington 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 September 11, 2025.
Use the filters below to find and compare flights from Portugal to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 11/4

6:25 am-10:35 am

2 stops36h 10m

Seattle/Tacoma Intl

Fri 11/14

7:00 am-5:25 am

1 stop14h 25m

$670

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 11/6

9:05 am-10:35 am

2 stops33h 30m

Seattle/Tacoma Intl

Tue 11/11

10:05 am-9:55 am

1 stop15h 50m

$672

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 11/6

1:15 pm-10:35 am

2 stops29h 20m

Seattle/Tacoma Intl

Fri 11/14

7:00 am-5:25 am

1 stop14h 25m

$676

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Wed 9/24

5:00 am-11:20 am

1 stop14h 20m

Portland

Thu 10/30

11:10 am-11:20 am

2 stops17h 10m

$746

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Thu 10/2

5:00 am-5:10 pm

2 stops20h 10m

Portland

Thu 10/16

7:30 am-2:50 pm

2 stops23h 20m

$750

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Mon 12/15

11:05 am-9:50 pm

1 stop18h 45m

Seattle/Tacoma Intl

Thu 1/1

11:40 am-2:45 pm

2 stops19h 05m

$753

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Tue 12/16

11:10 am-9:50 pm

1 stop18h 40m

Seattle/Tacoma Intl

Sun 12/28

6:50 pm-9:50 am

1 stop31h 00m

$755

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Tue 11/25

5:30 am-4:00 pm

2 stops18h 30m

Portland

Wed 12/3

10:05 am-11:20 am

2 stops17h 15m

$758

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Fri 9/26

12:20 pm-8:20 pm

1 stop16h 00m

Portland

Sun 10/12

10:10 am-8:20 am

1 stop14h 10m

$863

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Fri 9/26

10:25 am-9:15 pm

1 stop18h 50m

Portland

Sun 10/12

10:10 am-8:20 am

1 stop14h 10m

$866

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 Washington from

How to get the cheapest flight ticket from Portugal to State of Washington

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 State of Washington?

The month of April is, on average, the cheapest month to fly to State of Washington from Portugal, with most prices found around $800. If you aren’t able to travel to State of Washington during the month of April, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $804.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Portugal to State of Washington is on a Wednesday. Travelers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as $800. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Portugal to State of Washington for around $1,074.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is in the evening when flights can be purchased for as low as $718. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $873 on average. Flights to State of Washington from Portugal in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to State of Washington?

You are more likely to see cheaper flights to State of Washington from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $940 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Portugal for as low as $792 on momondo.

Can stopping save me money on Portugal to State of Washington flights?

You could potentially save up to 20% on your flight if you consider stops on a Portugal to State of Washington flight.

Cheap Portugal to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portugal to State of Washington

Direct flights

None
There are no direct flights from Portugal to State of Washington. There are no popular flight routes from Portugal to State of Washington.
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  • When did momondo last update prices for flights from Portugal to Washington?

    Prices for flights from Portugal to Washington were last updated today.

  • How many operators does momondo search for flights from Portugal to Washington?

  • How old do you have to be to fly from Portugal to Washington?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portugal to Washington.

  • What documentation or ID do you need to fly to Washington?

    The travel and health documents you'll need for your trip to Washington may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Portugal to State of Washington

Compare and see reviews for airlines that fly from Portugal to State of Washington with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $720Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
United AirlinesPriceFrom $738Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
Air FrancePriceFrom $762Free CancellationRating
7.4
1,469 reviews
Search Air France flights
DeltaPriceFrom $775Free CancellationRating
7.9
7,960 reviews
Search Delta flights
KLMPriceFrom $794Free CancellationRating
7.8
1,385 reviews
Search KLM flights

Why use momondo?

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

It is quick and easy to find Portugal to Washington 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 Washington that suits you.

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

Yes. All flights to Washington from Portugal on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Portugal to Washington flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Washington from Portugal. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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