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Cheap flights from Washington to Porto from $319

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 9/15. 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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Cheap round-trip flights

United Airlines Logo
10:52 am - 9:30 amPDX-OPO
15h 38m2 stops
United Airlines Logo
6:00 am - 10:33 pmOPO-PDX
24h 33m2 stops
$590United Airlines
Find Deal
Tue, Oct 28 - Tue, Nov 4
United Airlines Logo
10:52 am - 9:30 amPDX-OPO
15h 38m2 stops
United Airlines Logo
12:35 pm - 10:10 pmOPO-PDX
17h 35m1 stop
$593United Airlines
Find Deal
Tue, Oct 28 - Tue, Nov 4
Iberia Logo
10:30 am - 11:45 amSEA-OPO
17h 15m2 stops
Iberia Logo
8:20 am - 11:11 pmOPO-SEA
22h 51m2 stops
$608Iberia
Find Deal
Wed, Feb 4 - Wed, Feb 11
Iberia Logo
7:50 pm - 8:00 pmSEA-OPO
41h 10m2 stops
Iberia Logo
8:40 pm - 11:09 pmOPO-SEA
34h 29m2 stops
$618Iberia
Find Deal
Sun, Oct 26 - Thu, Feb 26
Turkish Airlines Logo
12:30 pm - 3:50 pmSEA-OPO
19h 20m1 stop
Turkish Airlines Logo
4:50 pm - 10:35 amOPO-SEA
25h 45m1 stop
$632Turkish Airlines
Find Deal
Thu, Oct 9 - Fri, Oct 24
Delta Logo
3:10 pm - 10:30 amSEA-OPO
36h 20m1 stop
Delta Logo
11:25 am - 10:55 amOPO-SEA
31h 30m2 stops
$634Delta
Find Deal
Sun, Oct 26 - Thu, Feb 26
Delta Logo
2:40 pm - 10:30 amSEA-OPO
12h 50m1 stop
Delta Logo
11:25 am - 11:25 amOPO-SEA
32h 00m1 stop
$635Delta
Find Deal
Tue, Oct 28 - Mon, Mar 2
Turkish Airlines Logo
7:10 pm - 9:50 amSEA-OPO
30h 40m1 stop
Turkish Airlines Logo
4:50 pm - 5:15 pmOPO-SEA
32h 25m1 stop
$644Turkish Airlines
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Mon, Sep 22 - Thu, Oct 9
American Airlines Logo
12:30 pm - 4:00 pmPDX-OPO
19h 30m2 stops
American Airlines Logo
8:20 am - 10:19 pmOPO-PDX
21h 59m2 stops
$658American Airlines
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Fri, Nov 28 - Fri, Dec 12
American Airlines Logo
2:06 pm - 7:55 pmPDX-OPO
21h 49m2 stops
American Airlines Logo
8:20 am - 11:00 pmOPO-PDX
22h 40m2 stops
$688American Airlines
Find Deal
Tue, Sep 30 - Fri, Jan 30

United Airlines flights from State of Washington to Porto

Our best United Airlines deals on State of Washington to Porto flight tickets
United Airlines
Oct 28
PDX10:52 amPortland
15h 38m
2 stops
OPO9:30 amPorto
Nov 4
OPO6:00 amPorto
24h 33m
2 stops
PDX10:33 pmPortland
$590
Find similar
United Airlines
Oct 28
PDX10:52 amPortland
15h 38m
2 stops
OPO9:30 amPorto
Nov 4
OPO12:35 pmPorto
17h 35m
1 stop
PDX10:10 pmPortland
$593
Find similar
United Airlines
Oct 28
PDX7:00 amPortland
19h 30m
3 stops
OPO9:30 amPorto
Nov 4
OPO6:00 amPorto
23h 26m
2 stops
PDX9:26 pmPortland
$594
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Turkish Airlines flights from State of Washington to Porto

Our best Turkish Airlines deals on State of Washington to Porto flight tickets
Turkish Airlines
Oct 9
SEA12:30 pmSeattle/Tacoma Intl
19h 20m
1 stop
OPO3:50 pmPorto
Oct 24
OPO4:50 pmPorto
25h 45m
1 stop
SEA10:35 amSeattle/Tacoma Intl
$632
Find similar
Turkish Airlines
Sep 22
SEA7:10 pmSeattle/Tacoma Intl
30h 40m
1 stop
OPO9:50 amPorto
Oct 9
OPO4:50 pmPorto
32h 25m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$644
Find similar
Turkish Airlines
Sep 22
SEA7:10 pmSeattle/Tacoma Intl
36h 40m
1 stop
OPO3:50 pmPorto
Oct 15
OPO10:50 amPorto
31h 45m
1 stop
SEA10:35 amSeattle/Tacoma Intl
$672
Find similar

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 August 11, 2025.
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

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 10/28

10:52 am-9:30 am

2 stops15h 38m

Porto

Tue 11/4

6:00 am-10:33 pm

2 stops24h 33m

$590

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 10/28

10:52 am-9:30 am

2 stops15h 38m

Porto

Tue 11/4

12:35 pm-10:10 pm

1 stop17h 35m

$593

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Wed 2/4

10:30 am-11:45 am

2 stops17h 15m

Porto

Wed 2/11

8:20 am-11:11 pm

2 stops22h 51m

$608

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sun 10/26

7:50 pm-8:00 pm

2 stops41h 10m

Porto

Thu 2/26

8:40 pm-11:09 pm

2 stops34h 29m

$618

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Thu 10/9

12:30 pm-3:50 pm

1 stop19h 20m

Porto

Fri 10/24

4:50 pm-10:35 am

1 stop25h 45m

$632

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Sun 10/26

3:10 pm-10:30 am

1 stop36h 20m

Porto

Thu 2/26

11:25 am-10:55 am

2 stops31h 30m

$634

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Tue 10/28

2:40 pm-10:30 am

1 stop12h 50m

Porto

Mon 3/2

11:25 am-11:25 am

1 stop32h 00m

$635

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

Mon 9/22

7:10 pm-9:50 am

1 stop30h 40m

Porto

Thu 10/9

4:50 pm-5:15 pm

1 stop32h 25m

$644

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 11/28

12:30 pm-4:00 pm

2 stops19h 30m

Porto

Fri 12/12

8:20 am-10:19 pm

2 stops21h 59m

$658

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 9/30

2:06 pm-7:55 pm

2 stops21h 49m

Porto

Fri 1/30

8:20 am-11:00 pm

2 stops22h 40m

$688

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 March is, on average, the cheapest month to fly to Porto from State of Washington, with most prices found around $790. If you aren’t able to travel during the month of March, then book flights to Porto from State of Washington during October instead. Flights to Porto in October, while not as cheap as those in March, still average around $813.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Tuesday when prices can be found for as low as $1,008. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $1,286. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

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

In the evening is the cheapest time of day to fly from State of Washington to Porto when you can find flight prices for as low as $837. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,130 on average. Flights to Porto from State of Washington 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 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 $1,035 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 $805 on momondo.

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

You could potentially save up to 45% on your flight if you consider stops on a State of Washington to Porto flight.

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

Best Price Found

$319

Fastest flight time

12h 50m

Direct flights

None

Airports in Porto

1 airport
The best one-way flight to Porto from State of Washington in the past 72 hours is $319. The best round-trip flight deal from State of Washington to Porto found on momondo in the last 72 hours is $590.
The fastest flight from State of Washington to Porto takes 12h 50m
There are no direct flights from State of Washington to Porto. Popular non-direct routes for this connection are Portland Airport - Porto Airport and Seattle/Tacoma Intl Airport - Porto Airport.
There is 1 airport near Porto: Porto (OPO)
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  • 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
LufthansaPriceFrom $642Free CancellationRating
6.8
7,302 reviews
Search Lufthansa flights
KLMPriceFrom $649Free CancellationRating
7.8
1,381 reviews
Search KLM flights
DeltaPriceFrom $659Free CancellationRating
8.0
7,979 reviews
Search Delta flights
British AirwaysPriceFrom $673Free CancellationRating
6.6
7,261 reviews
Search British Airways flights
Turkish AirlinesPriceFrom $685Free CancellationRating
7.3
3,941 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $717Free CancellationRating
7.4
8,920 reviews
Search United Airlines flights

Traveling to a place near Porto?

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