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Cheap flights from Portugal to Washington from $368

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 3/6. 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
5:55 am - 10:33 am
LIS
-
SEA
36h 38m2 stops
Multiple Airlines Logo
2:35 pm - 8:20 pm
SEA
-
LIS
21h 45m1 stop
$701Multiple Airlines
Thu, Jan 29 - Wed, Feb 11
Scandinavian Airlines Logo
7:00 pm - 10:24 pm
LIS
-
PDX
35h 24m2 stops
Scandinavian Airlines Logo
1:02 pm - 8:55 am
PDX
-
LIS
35h 53m2 stops
$738Scandinavian Airlines
Wed, Feb 11 - Wed, Feb 25
American Airlines Logo
8:20 am - 11:29 pm
LIS
-
SEA
23h 09m2 stops
American Airlines Logo
1:37 pm - 5:45 pm
SEA
-
LIS
21h 08m2 stops
$750American Airlines
Thu, Mar 5 - Sun, Mar 8
American Airlines Logo
10:55 am - 10:18 pm
LIS
-
SEA
19h 23m1 stop
American Airlines Logo
7:50 pm - 9:45 pm
SEA
-
LIS
18h 55m1 stop
$752American Airlines
Thu, Mar 5 - Sun, Mar 8
Multiple Airlines Logo
12:00 pm - 2:19 pm
OPO
-
SEA
34h 19m3 stops
Multiple Airlines Logo
2:35 pm - 5:20 pm
SEA
-
OPO
18h 45m2 stops
$753Multiple Airlines
Sun, Feb 1 - Sun, Feb 8
American Airlines Logo
8:20 am - 11:30 am
LIS
-
SEA
35h 10m2 stops
American Airlines Logo
7:50 pm - 12:05 pm
SEA
-
LIS
33h 15m1 stop
$754American Airlines
Thu, Mar 5 - Sun, Mar 8
British Airways Logo
11:05 am - 9:46 pm
LIS
-
SEA
18h 41m1 stop
British Airways Logo
1:35 pm - 11:10 pm
SEA
-
LIS
25h 35m1 stop
$755British Airways
Wed, Apr 8 - Wed, Apr 22
British Airways Logo
11:05 am - 10:07 pm
LIS
-
SEA
19h 02m1 stop
British Airways Logo
8:04 am - 2:45 pm
SEA
-
LIS
22h 41m2 stops
$756British Airways
Mon, Jan 12 - Tue, Jan 27
Iberia Logo
8:20 am - 10:20 pm
OPO
-
SEA
22h 00m2 stops
Iberia Logo
10:50 am - 4:00 pm
SEA
-
OPO
21h 10m2 stops
$774Iberia
Sun, Feb 1 - Sun, Feb 8
Delta Logo
5:00 am - 11:50 am
OPO
-
SEA
14h 50m1 stop
Delta Logo
9:25 am - 10:30 am
SEA
-
OPO
17h 05m2 stops
$808Delta
Sun, Jan 18 - Tue, Jan 27

Iberia flights from Portugal to State of Washington

Our best Iberia deals on Portugal to State of Washington flight tickets
Iberia
Feb 1
OPO8:20 amPorto
22h 00m
2 stops
SEA10:20 pmSeattle/Tacoma Intl
Feb 8
SEA10:50 amSeattle/Tacoma Intl
21h 10m
2 stops
OPO4:00 pmPorto
$774
Find similar
Iberia
Feb 5
LIS8:20 amLisbon Humberto Delgado
22h 00m
2 stops
SEA10:20 pmSeattle/Tacoma Intl
Feb 12
SEA7:00 amSeattle/Tacoma Intl
32h 25m
2 stops
LIS11:25 pmLisbon Humberto Delgado
$796
Find similar
Iberia
Jan 12
LIS8:45 pmLisbon Humberto Delgado
20h 52m
2 stops
SEA9:37 amSeattle/Tacoma Intl
Jan 27
SEA6:00 amSeattle/Tacoma Intl
17h 40m
2 stops
LIS7:40 amLisbon Humberto Delgado
$871
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
May 21
OPO6:00 amPorto
22h 10m
2 stops
SEA8:10 pmSeattle/Tacoma Intl
May 25
SEA6:50 amSeattle/Tacoma Intl
16h 05m
1 stop
OPO6:55 amPorto
$890
Find similar
United Airlines
May 21
OPO6:00 amPorto
22h 10m
2 stops
SEA8:10 pmSeattle/Tacoma Intl
May 25
SEA6:50 amSeattle/Tacoma Intl
16h 05m
1 stop
OPO6:55 amPorto
$893
Find similar
United Airlines
Jan 12
LIS10:15 amLisbon Humberto Delgado
20h 28m
3 stops
SEA10:43 pmSeattle/Tacoma Intl
Jan 27
SEA7:00 amSeattle/Tacoma Intl
17h 10m
2 stops
LIS8:10 amLisbon Humberto Delgado
$922
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 December 24, 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

Thu 1/29

5:55 am-10:33 am

2 stops36h 38m

Seattle/Tacoma Intl

Wed 2/11

2:35 pm-8:20 pm

1 stop21h 45m

$701

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Wed 2/11

7:00 pm-10:24 pm

2 stops35h 24m

Portland

Wed 2/25

1:02 pm-8:55 am

2 stops35h 53m

$738

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 3/5

8:20 am-11:29 pm

2 stops23h 09m

Seattle/Tacoma Intl

Sun 3/8

1:37 pm-5:45 pm

2 stops21h 08m

$750

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 3/5

10:55 am-10:18 pm

1 stop19h 23m

Seattle/Tacoma Intl

Sun 3/8

7:50 pm-9:45 pm

1 stop18h 55m

$752

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 2/1

12:00 pm-2:19 pm

3 stops34h 19m

Seattle/Tacoma Intl

Sun 2/8

2:35 pm-5:20 pm

2 stops18h 45m

$753

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Thu 3/5

8:20 am-11:30 am

2 stops35h 10m

Seattle/Tacoma Intl

Sun 3/8

7:50 pm-12:05 pm

1 stop33h 15m

$754

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 4/8

11:05 am-9:46 pm

1 stop18h 41m

Seattle/Tacoma Intl

Wed 4/22

1:35 pm-11:10 pm

1 stop25h 35m

$755

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Mon 1/12

11:05 am-10:07 pm

1 stop19h 02m

Seattle/Tacoma Intl

Tue 1/27

8:04 am-2:45 pm

2 stops22h 41m

$756

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 2/1

8:20 am-10:20 pm

2 stops22h 00m

Seattle/Tacoma Intl

Sun 2/8

10:50 am-4:00 pm

2 stops21h 10m

$774

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 1/18

5:00 am-11:50 am

1 stop14h 50m

Seattle/Tacoma Intl

Tue 1/27

9:25 am-10:30 am

2 stops17h 05m

$808

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 $801.

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 $944 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 $825 on momondo.

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

You could potentially save up to 12% 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

Fastest flight time

18h 20m

Direct flights

None
The fastest flight from Portugal to State of Washington takes 18h 20m
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
6.7
7,614 reviews
Search British Airways flights
United AirlinesPriceFrom $738Free CancellationRating
7.4
9,114 reviews
Search United Airlines flights
Air FrancePriceFrom $762Free CancellationRating
7.4
1,513 reviews
Search Air France flights
DeltaPriceFrom $775Free CancellationRating
7.9
8,011 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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