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Cheap flights from Portugal to Washington from $441

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 4/6. 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
0 bags

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Find the cheapest flights from Portugal to Washington

Recent round-trip flight deals from Portugal to Washington

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:35 am - 7:05 pmLIS-SEA
18h 30m1 stop
Multiple Airlines Logo
3:10 pm - 7:20 pmSEA-LIS
21h 10m2 stops
$774Multiple Airlines
Find Deal
Wed, Mar 4 - Sun, Mar 8
Multiple Airlines Logo
5:55 am - 7:43 pmLIS-SEA
21h 48m2 stops
Multiple Airlines Logo
3:00 pm - 3:05 pmSEA-LIS
17h 05m1 stop
$787Multiple Airlines
Find Deal
Wed, Mar 4 - Thu, Mar 12
Delta Logo
5:00 am - 11:35 amLIS-SEA
14h 35m1 stop
Delta Logo
3:10 pm - 3:10 pmSEA-LIS
17h 00m1 stop
$823Delta
Find Deal
Mon, Mar 2 - Mon, Mar 9
Delta Logo
5:00 am - 2:37 pmLIS-SEA
17h 37m2 stops
Delta Logo
7:20 am - 11:20 amSEA-LIS
21h 00m2 stops
$829Delta
Find Deal
Sun, Mar 1 - Sun, Mar 8
United Airlines Logo
6:00 am - 11:04 pmOPO-SEA
24h 04m2 stops
United Airlines Logo
5:07 am - 9:45 amSEA-OPO
20h 38m2 stops
$848United Airlines
Find Deal
Thu, Mar 26 - Mon, Mar 30
Air Canada Logo
5:00 am - 6:30 pmLIS-PDX
21h 30m2 stops
Air Canada Logo
3:15 pm - 9:20 amPDX-LIS
34h 05m2 stops
$850Air Canada
Find Deal
Thu, Dec 4 - Mon, Dec 8
United Airlines Logo
5:00 am - 12:10 pmLIS-SEA
15h 10m1 stop
United Airlines Logo
8:57 am - 10:15 amSEA-LIS
17h 18m2 stops
$852United Airlines
Find Deal
Thu, Dec 18 - Tue, Dec 30
Air Canada Logo
10:55 am - 9:31 amLIS-SEA
30h 36m2 stops
Air Canada Logo
8:00 pm - 9:20 amSEA-LIS
29h 20m2 stops
$870Air Canada
Find Deal
Thu, Dec 25 - Wed, Jan 7
British Airways Logo
7:00 am - 4:55 pmLIS-SEA
17h 55m1 stop
British Airways Logo
7:50 pm - 6:00 pmSEA-LIS
15h 10m1 stop
$895British Airways
Find Deal
Sat, Feb 28 - Thu, Mar 12
British Airways Logo
3:55 pm - 6:02 pmLIS-PDX
34h 07m2 stops
British Airways Logo
12:49 am - 6:55 amPDX-LIS
22h 06m2 stops
$971British Airways
Find Deal
Thu, Dec 25 - Tue, Dec 30

Delta flights from Portugal to State of Washington

Our best Delta deals on Portugal to State of Washington flight tickets
Delta
Mar 2
LIS5:00 amLisbon Humberto Delgado
14h 35m
1 stop
SEA11:35 amSeattle/Tacoma Intl
Mar 9
SEA3:10 pmSeattle/Tacoma Intl
17h 00m
1 stop
LIS3:10 pmLisbon Humberto Delgado
$823
Find similar
Delta
Mar 1
LIS5:00 amLisbon Humberto Delgado
17h 37m
2 stops
SEA2:37 pmSeattle/Tacoma Intl
Mar 8
SEA7:20 amSeattle/Tacoma Intl
21h 00m
2 stops
LIS11:20 amLisbon Humberto Delgado
$829
Find similar
Delta
Mar 3
LIS5:30 amLisbon Humberto Delgado
21h 28m
2 stops
SEA6:58 pmSeattle/Tacoma Intl
Mar 10
SEA1:30 pmSeattle/Tacoma Intl
18h 40m
2 stops
LIS3:10 pmLisbon Humberto Delgado
$835
Find similar

United Airlines flights from Portugal to State of Washington

Our best United Airlines deals on Portugal to State of Washington flight tickets
United Airlines
Mar 26
OPO6:00 amPorto
24h 04m
2 stops
SEA11:04 pmSeattle/Tacoma Intl
Mar 30
SEA5:07 amSeattle/Tacoma Intl
20h 38m
2 stops
OPO9:45 amPorto
$848
Find similar
United Airlines
Dec 18
LIS5:00 amLisbon Humberto Delgado
15h 10m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
Dec 30
SEA8:57 amSeattle/Tacoma Intl
17h 18m
2 stops
LIS10:15 amLisbon Humberto Delgado
$852
Find similar
United Airlines
Dec 24
LIS5:00 amLisbon Humberto Delgado
20h 37m
2 stops
PDX5:37 pmPortland
Dec 30
PDX10:52 pmPortland
27h 23m
1 stop
LIS10:15 amLisbon Humberto Delgado
$856
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 November 6, 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

Wed 3/4

8:35 am-7:05 pm

1 stop18h 30m

Seattle/Tacoma Intl

Sun 3/8

3:10 pm-7:20 pm

2 stops21h 10m

$774

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 3/4

5:55 am-7:43 pm

2 stops21h 48m

Seattle/Tacoma Intl

Thu 3/12

3:00 pm-3:05 pm

1 stop17h 05m

$787

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Mon 3/2

5:00 am-11:35 am

1 stop14h 35m

Seattle/Tacoma Intl

Mon 3/9

3:10 pm-3:10 pm

1 stop17h 00m

$823

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sun 3/1

5:00 am-2:37 pm

2 stops17h 37m

Seattle/Tacoma Intl

Sun 3/8

7:20 am-11:20 am

2 stops21h 00m

$829

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 3/26

6:00 am-11:04 pm

2 stops24h 04m

Seattle/Tacoma Intl

Mon 3/30

5:07 am-9:45 am

2 stops20h 38m

$848

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Thu 12/4

5:00 am-6:30 pm

2 stops21h 30m

Portland

Mon 12/8

3:15 pm-9:20 am

2 stops34h 05m

$850

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 12/18

5:00 am-12:10 pm

1 stop15h 10m

Seattle/Tacoma Intl

Tue 12/30

8:57 am-10:15 am

2 stops17h 18m

$852

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 12/25

10:55 am-9:31 am

2 stops30h 36m

Seattle/Tacoma Intl

Wed 1/7

8:00 pm-9:20 am

2 stops29h 20m

$870

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Sat 2/28

7:00 am-4:55 pm

1 stop17h 55m

Seattle/Tacoma Intl

Thu 3/12

7:50 pm-6:00 pm

1 stop15h 10m

$895

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Thu 12/25

3:55 pm-6:02 pm

2 stops34h 07m

Portland

Tue 12/30

12:49 am-6:55 am

2 stops22h 06m

$971

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 $803.

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 $950 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 23% 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.
Search flight deals

  • 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
6.7
7,500 reviews
Search British Airways flights
United AirlinesPriceFrom $738Free CancellationRating
7.4
9,004 reviews
Search United Airlines flights
Air FrancePriceFrom $762Free CancellationRating
7.4
1,484 reviews
Search Air France flights
DeltaPriceFrom $775Free CancellationRating
7.9
8,002 reviews
Search Delta 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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