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Cheap flights from Washington to Porto from $247

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Porto departing on 4/20. 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 Washington to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:30 pm - 5:50 pm
PDX
-
OPO
18h 20m
2 stops
Multiple Airlines Logo
6:30 pm - 6:00 pm
OPO
-
PDX
55h 30m
2 stops
$610Multiple Airlines
Tue, Apr 28 - Wed, May 6
Multiple Airlines Logo
3:30 pm - 3:00 pm
PDX
-
OPO
39h 30m
3 stops
Multiple Airlines Logo
10:00 am - 6:00 pm
OPO
-
PDX
64h 00m
3 stops
$653Multiple Airlines
Tue, Apr 28 - Wed, May 6
Multiple Airlines Logo
3:40 pm - 11:40 pm
SEA
-
OPO
24h 00m
3 stops
Multiple Airlines Logo
8:50 am - 10:53 pm
OPO
-
SEA
22h 03m
3 stops
$670Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Turkish Airlines Logo
7:10 pm - 3:50 pm
SEA
-
OPO
36h 40m
1 stop
Turkish Airlines Logo
10:40 am - 5:15 pm
OPO
-
SEA
38h 35m
1 stop
$671Turkish Airlines
Sun, May 3 - Tue, May 26
Turkish Airlines Logo
7:10 pm - 9:40 am
SEA
-
OPO
30h 30m
1 stop
Turkish Airlines Logo
4:50 pm - 5:15 pm
OPO
-
SEA
32h 25m
1 stop
$680Turkish Airlines
Sun, May 3 - Tue, May 26
Turkish Airlines Logo
7:10 pm - 3:50 pm
SEA
-
OPO
36h 40m
1 stop
Turkish Airlines Logo
4:50 pm - 5:15 pm
OPO
-
SEA
32h 25m
1 stop
$681Turkish Airlines
Sun, May 3 - Tue, May 26
Turkish Airlines Logo
7:10 pm - 9:45 am
SEA
-
OPO
30h 35m
1 stop
Turkish Airlines Logo
4:50 pm - 5:15 pm
OPO
-
SEA
32h 25m
1 stop
$696Turkish Airlines
Thu, Sep 10 - Tue, Sep 22
British Airways Logo
7:30 pm - 8:35 pm
PDX
-
OPO
17h 05m
1 stop
British Airways Logo
8:55 pm - 5:40 pm
OPO
-
PDX
28h 45m
1 stop
$742British Airways
Sun, Apr 19 - Tue, May 5
British Airways Logo
7:30 pm - 7:30 pm
PDX
-
OPO
16h 00m
1 stop
British Airways Logo
8:20 am - 10:56 pm
OPO
-
PDX
22h 36m
2 stops
$759British Airways
Tue, Apr 28 - Wed, May 6
Iberia Logo
11:56 am - 8:00 pm
PDX
-
OPO
24h 04m
2 stops
Iberia Logo
8:40 pm - 11:54 pm
OPO
-
PDX
35h 14m
2 stops
$775Iberia
Tue, Apr 28 - Thu, May 7

Turkish Airlines flights from State of Washington to Porto

Our best Turkish Airlines deals on State of Washington to Porto flight tickets
Turkish Airlines
May 3
SEA7:10 pmSeattle/Tacoma Intl
36h 40m
1 stop
OPO3:50 pmPorto
May 26
OPO10:40 amPorto
38h 35m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$671
Turkish Airlines
May 3
SEA7:10 pmSeattle/Tacoma Intl
30h 30m
1 stop
OPO9:40 amPorto
May 26
OPO4:50 pmPorto
32h 25m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$680
Turkish Airlines
May 3
SEA7:10 pmSeattle/Tacoma Intl
36h 40m
1 stop
OPO3:50 pmPorto
May 26
OPO4:50 pmPorto
32h 25m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$681

Air Canada flights from State of Washington to Porto

Our best Air Canada deals on State of Washington to Porto flight tickets
Air Canada
Aug 8
SEA7:20 pmSeattle/Tacoma Intl
51h 40m
2 stops
OPO7:00 amPorto
Aug 26
OPO2:25 pmPorto
27h 27m
2 stops
SEA9:52 amSeattle/Tacoma Intl
$737
Air Canada
Aug 8
SEA7:20 pmSeattle/Tacoma Intl
51h 40m
2 stops
OPO7:00 amPorto
Aug 25
OPO12:15 pmPorto
29h 37m
2 stops
SEA9:52 amSeattle/Tacoma Intl
$787
Air Canada
Aug 8
SEA3:00 pmSeattle/Tacoma Intl
56h 00m
2 stops
OPO7:00 amPorto
Aug 25
OPO12:15 pmPorto
29h 37m
2 stops
SEA9:52 amSeattle/Tacoma Intl
$796

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Porto 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 March 20, 2026.
Use the filters below to find and compare flights from Washington to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/28

3:30 pm-5:50 pm

2 stops18h 20m

Porto

Wed 5/6

6:30 pm-6:00 pm

2 stops55h 30m

$610

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/28

3:30 pm-3:00 pm

3 stops39h 30m

Porto

Wed 5/6

10:00 am-6:00 pm

3 stops64h 00m

$653

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Mon 4/13

3:40 pm-11:40 pm

3 stops24h 00m

Porto

Mon 4/20

8:50 am-10:53 pm

3 stops22h 03m

$670

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sun 5/3

7:10 pm-3:50 pm

1 stop36h 40m

Porto

Tue 5/26

10:40 am-5:15 pm

1 stop38h 35m

$671

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sun 5/3

7:10 pm-9:40 am

1 stop30h 30m

Porto

Tue 5/26

4:50 pm-5:15 pm

1 stop32h 25m

$680

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sun 5/3

7:10 pm-3:50 pm

1 stop36h 40m

Porto

Tue 5/26

4:50 pm-5:15 pm

1 stop32h 25m

$681

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Thu 9/10

7:10 pm-9:45 am

1 stop30h 35m

Porto

Tue 9/22

4:50 pm-5:15 pm

1 stop32h 25m

$696

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 4/19

7:30 pm-8:35 pm

1 stop17h 05m

Porto

Tue 5/5

8:55 pm-5:40 pm

1 stop28h 45m

$742
Quickest round-trip

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/28

7:30 pm-7:30 pm

1 stop16h 00m

Porto

Wed 5/6

8:20 am-10:56 pm

2 stops22h 36m

$759

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 4/28

11:56 am-8:00 pm

2 stops24h 04m

Porto

Thu 5/7

8:40 pm-11:54 pm

2 stops35h 14m

$775

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 Porto from

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

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 Porto?

The month of January is, on average, the cheapest month to fly to Porto from State of Washington, with most prices found around $498. If you aren’t able to travel during the month of January, then book flights to Porto from State of Washington during March instead. Flights to Porto in March, while not as cheap as those in January, still average around $680.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $879 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from State of Washington for as low as $735 on momondo.

Cheap State of Washington to Porto flight deals and tips

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

Fastest flight time

15h 12m

Direct flights

None
The fastest flight from State of Washington to Porto takes 15h 12m
There are no direct flights from State of Washington to Porto. There are no popular flight routes from State of Washington to Porto.
Search flight deals

  • When did momondo last update prices for flights from Washington to Porto Airport?

    Prices for flights from Washington to Porto Airport are updated daily.

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

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

    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 Washington to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents you'll need for your trip to Porto Airport 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 Porto Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to Porto

Compare and see reviews for airlines that fly from State of Washington to Porto with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $490Free CancellationRating
7.8
1,475 reviews
Search KLM flights
LufthansaPriceFrom $503Free CancellationRating
6.8
7,858 reviews
Search Lufthansa flights
DeltaPriceFrom $582Free CancellationRating
7.9
8,314 reviews
Search Delta flights
United AirlinesPriceFrom $654Free CancellationRating
7.4
9,453 reviews
Search United Airlines flights
Air CanadaPriceFrom $660Free CancellationRating
7.1
10,818 reviews
Search Air Canada flights
Air FrancePriceFrom $1,029Free CancellationRating
7.4
1,547 reviews
Search Air France flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Aveiro
Braga
Matosinhos
Esposende
Lamego
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Porto. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Porto from Washington which offer a flexible booking policy as well as other useful filters and features.

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

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 Washington to Porto.

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

Of course. momondo tracks the price of Washington to Porto flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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