Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Portugal to Washington from $310

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 4/21. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
6:30 am - 7:25 pm
LIS
-
SEA
20h 55m
2 stops
Multiple Airlines Logo
3:40 pm - 1:50 pm
SEA
-
LIS
14h 10m
1 stop
$724Multiple Airlines
Tue, Apr 21 - Wed, Apr 22
Multiple Airlines Logo
6:15 am - 6:00 pm
LIS
-
SEA
18h 45m
2 stops
Multiple Airlines Logo
3:35 pm - 10:50 pm
SEA
-
LIS
24h 15m
2 stops
$730Multiple Airlines
Wed, Mar 11 - Mon, Mar 16
Multiple Airlines Logo
6:15 am - 6:00 pm
LIS
-
SEA
18h 45m
2 stops
Multiple Airlines Logo
3:35 pm - 10:50 pm
SEA
-
LIS
24h 15m
2 stops
$731Multiple Airlines
Wed, Mar 11 - Mon, Mar 16
Multiple Airlines Logo
6:15 am - 6:00 pm
LIS
-
SEA
18h 45m
2 stops
Multiple Airlines Logo
3:35 pm - 8:30 am
SEA
-
LIS
33h 55m
3 stops
$761Multiple Airlines
Wed, Mar 11 - Mon, Mar 16
KLM Logo
7:45 pm - 11:10 am
LIS
-
PDX
23h 25m
1 stop
KLM Logo
5:05 pm - 6:45 pm
PDX
-
LIS
17h 40m
2 stops
$830KLM
Thu, Apr 2 - Wed, Apr 15
KLM Logo
7:45 pm - 11:10 am
LIS
-
PDX
23h 25m
1 stop
KLM Logo
1:05 pm - 10:50 pm
PDX
-
LIS
25h 45m
1 stop
$832KLM
Thu, Apr 2 - Wed, Apr 15
Delta Logo
5:00 am - 2:52 pm
LIS
-
PDX
17h 52m
2 stops
Delta Logo
1:05 pm - 6:45 pm
PDX
-
LIS
21h 40m
1 stop
$879Delta
Mon, May 11 - Mon, May 18
Delta Logo
9:50 am - 10:19 pm
LIS
-
PDX
20h 29m
2 stops
Delta Logo
3:30 pm - 5:50 pm
PDX
-
LIS
18h 20m
2 stops
$880Delta
Sat, Apr 4 - Mon, Apr 20
Air Canada Logo
6:00 am - 7:18 pm
OPO
-
SEA
21h 18m
2 stops
Air Canada Logo
5:40 am - 3:40 pm
SEA
-
OPO
26h 00m
2 stops
$893Air Canada
Wed, Apr 15 - Sun, Apr 19
United Airlines Logo
6:00 am - 11:27 pm
OPO
-
SEA
25h 27m
3 stops
United Airlines Logo
7:00 am - 9:45 am
SEA
-
OPO
18h 45m
2 stops
$894United Airlines
Wed, Apr 15 - Sun, Apr 19

United Airlines flights from Portugal to State of Washington

Our best United Airlines deals on Portugal to State of Washington flight tickets
United Airlines
Apr 15
OPO6:00 amPorto
25h 27m
3 stops
SEA11:27 pmSeattle/Tacoma Intl
Apr 19
SEA7:00 amSeattle/Tacoma Intl
18h 45m
2 stops
OPO9:45 amPorto
$894
United Airlines
Mar 14
OPO6:00 amPorto
25h 59m
2 stops
SEA12:59 amSeattle/Tacoma Intl
Mar 24
SEA12:25 pmSeattle/Tacoma Intl
14h 05m
1 stop
OPO9:30 amPorto
$895
United Airlines
Apr 15
OPO6:00 amPorto
20h 00m
2 stops
SEA6:00 pmSeattle/Tacoma Intl
Apr 19
SEA2:10 pmSeattle/Tacoma Intl
17h 30m
1 stop
OPO3:40 pmPorto
$900

Delta flights from Portugal to State of Washington

Our best Delta deals on Portugal to State of Washington flight tickets
Delta
Feb 20
LIS5:00 amLisbon Humberto Delgado
14h 40m
1 stop
SEA11:40 amSeattle/Tacoma Intl
Mar 5
SEA1:40 pmSeattle/Tacoma Intl
19h 50m
1 stop
LIS5:30 pmLisbon Humberto Delgado
$867
Delta
Feb 23
LIS5:00 amLisbon Humberto Delgado
14h 40m
1 stop
SEA11:40 amSeattle/Tacoma Intl
Mar 8
SEA3:10 pmSeattle/Tacoma Intl
17h 00m
1 stop
LIS3:10 pmLisbon Humberto Delgado
$868
Delta
Feb 23
LIS5:00 amLisbon Humberto Delgado
14h 40m
1 stop
SEA11:40 amSeattle/Tacoma Intl
Mar 8
SEA11:25 amSeattle/Tacoma Intl
16h 55m
2 stops
LIS11:20 amLisbon Humberto Delgado
$869

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 February 9, 2026.
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 4/21

6:30 am-7:25 pm

2 stops20h 55m

Seattle/Tacoma Intl

Wed 4/22

3:40 pm-1:50 pm

1 stop14h 10m

$724

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 3/11

6:15 am-6:00 pm

2 stops18h 45m

Seattle/Tacoma Intl

Mon 3/16

3:35 pm-10:50 pm

2 stops24h 15m

$730

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 3/11

6:15 am-6:00 pm

2 stops18h 45m

Seattle/Tacoma Intl

Mon 3/16

3:35 pm-10:50 pm

2 stops24h 15m

$731

LisbonSeattle

LIS - SEA

LISSEA

Lisbon Humberto Delgado

Wed 3/11

6:15 am-6:00 pm

2 stops18h 45m

Seattle/Tacoma Intl

Mon 3/16

3:35 pm-8:30 am

3 stops33h 55m

$761

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Thu 4/2

7:45 pm-11:10 am

1 stop23h 25m

Portland

Wed 4/15

5:05 pm-6:45 pm

2 stops17h 40m

$830

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Thu 4/2

7:45 pm-11:10 am

1 stop23h 25m

Portland

Wed 4/15

1:05 pm-10:50 pm

1 stop25h 45m

$832

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Mon 5/11

5:00 am-2:52 pm

2 stops17h 52m

Portland

Mon 5/18

1:05 pm-6:45 pm

1 stop21h 40m

$879

LisbonPortland

LIS - PDX

LISPDX

Lisbon Humberto Delgado

Sat 4/4

9:50 am-10:19 pm

2 stops20h 29m

Portland

Mon 4/20

3:30 pm-5:50 pm

2 stops18h 20m

$880

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 4/15

6:00 am-7:18 pm

2 stops21h 18m

Seattle/Tacoma Intl

Sun 4/19

5:40 am-3:40 pm

2 stops26h 00m

$893

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 4/15

6:00 am-11:27 pm

3 stops25h 27m

Seattle/Tacoma Intl

Sun 4/19

7:00 am-9:45 am

2 stops18h 45m

$894

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $807. 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 $821.

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

You could potentially save up to 26% 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

14h 35m

Direct flights

None
The fastest flight from Portugal to State of Washington takes 14h 35m
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
7,721 reviews
Search British Airways flights
United AirlinesPriceFrom $738Free CancellationRating
7.4
9,259 reviews
Search United Airlines flights
Air FrancePriceFrom $762Free CancellationRating
7.4
1,531 reviews
Search Air France flights
DeltaPriceFrom $775Free CancellationRating
7.9
8,174 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.

An easier way to manage your State of Washington 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 3/11
Wed 3/18
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo
Flights to New Yorkfrom $49
Flights to Los Angelesfrom $49
Flights to Miamifrom $36
Flights to Chicagofrom $50
Flights to Orlandofrom $27
Flights to San Franciscofrom $51
Flights to Las Vegasfrom $28
Flights to Washington, D.C.from $51
Flights to Bostonfrom $50
Flights to Atlantafrom $49
Flights to Dallasfrom $50
Flights to Seattlefrom $65