What is the cheapest airline that flies from Porto to Washington?

American Airlines is the most popular carrier operating from Porto to Washington

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

Prices for flights from Porto Airport to Washington are refreshed on a daily basis.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport 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.

$434 Cheap Flights from Porto to Washington in 2026

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Find the cheapest flights from Porto to Washington

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:15 am - 4:40 pm

OPO

SEA

17h 25m

2 stops

3:35 pm - 9:45 pm

SEA

OPO

23h 10m

2 stops

$836Multiple Airlines

Sat, Mar 14 - Tue, Mar 24

6:15 am - 4:40 pm

OPO

SEA

17h 25m

2 stops

3:35 pm - 9:45 pm

SEA

OPO

23h 10m

2 stops

$847Multiple Airlines

Sat, Mar 14 - Tue, Mar 24

5:00 am - 11:35 am

OPO

SEA

14h 35m

1 stop

7:20 am - 10:30 am

SEA

OPO

20h 10m

2 stops

$861Delta

Sun, Mar 1 - Sun, Mar 8

5:00 am - 11:35 am

OPO

SEA

14h 35m

1 stop

3:10 pm - 10:30 am

SEA

OPO

36h 20m

1 stop

$862Multiple Airlines

Sun, Mar 1 - Sun, Mar 8

5:00 am - 5:00 pm

OPO

SEA

20h 00m

2 stops

7:15 am - 10:30 am

SEA

OPO

20h 15m

2 stops

$866Delta

Sun, Mar 1 - Sun, Mar 8

6:15 am - 4:40 pm

OPO

SEA

17h 25m

2 stops

8:00 am - 8:20 pm

SEA

OPO

29h 20m

3 stops

$871Multiple Airlines

Sat, Mar 14 - Tue, Mar 24

9:45 pm - 9:53 pm

OPO

SEA

32h 08m

2 stops

7:00 pm - 9:20 pm

SEA

OPO

18h 20m

3 stops

$878Multiple Airlines

Sun, Apr 19 - Sat, Apr 25

11:25 am - 12:25 pm

OPO

SEA

32h 00m

1 stop

6:40 pm - 10:00 pm

SEA

OPO

19h 20m

1 stop

$880Multiple Airlines

Mon, Mar 23 - Mon, Mar 30

11:25 am - 12:25 pm

OPO

SEA

32h 00m

1 stop

3:30 pm - 3:30 pm

SEA

OPO

16h 00m

2 stops

$890KLM

Mon, Mar 23 - Mon, Mar 30

6:00 am - 7:18 pm

OPO

SEA

21h 18m

2 stops

5:40 am - 3:40 pm

SEA

OPO

26h 00m

2 stops

$893Air Canada

Wed, Apr 15 - Sun, Apr 19

United Airlines flights from Porto to State of Washington

Our best United Airlines deals on Porto 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

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

$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

Turkish Airlines flights from Porto to State of Washington

Our best Turkish Airlines deals on Porto to State of Washington flight tickets

Turkish Airlines

Apr 19

OPO4:40 pmPorto

32h 35m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

Apr 25

SEA7:10 pmSeattle/Tacoma Intl

20h 20m

1 stop

OPO11:30 pmPorto

$941

Turkish Airlines

Mar 21

OPO10:55 amPorto

38h 10m

1 stop

SEA6:05 pmSeattle/Tacoma Intl

Mar 28

SEA7:10 pmSeattle/Tacoma Intl

20h 20m

1 stop

OPO11:30 pmPorto

$958

Turkish Airlines

Mar 7

OPO4:10 pmPorto

32h 55m

1 stop

SEA5:05 pmSeattle/Tacoma Intl

Mar 14

SEA8:00 pmSeattle/Tacoma Intl

36h 10m

1 stop

OPO3:10 pmPorto

$986

Fly from

Fly to

Route

Depart

Return

Price

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sat 3/14

6:15 am-4:40 pm

2 stops17h 25m

Seattle/Tacoma Intl

Tue 3/24

3:35 pm-9:45 pm

2 stops23h 10m

$836

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sat 3/14

6:15 am-4:40 pm

2 stops17h 25m

Seattle/Tacoma Intl

Tue 3/24

3:35 pm-9:45 pm

2 stops23h 10m

$847

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 3/1

5:00 am-11:35 am

1 stop14h 35m

Seattle/Tacoma Intl

Sun 3/8

7:20 am-10:30 am

2 stops20h 10m

$861

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 3/1

5:00 am-11:35 am

1 stop14h 35m

Seattle/Tacoma Intl

Sun 3/8

3:10 pm-10:30 am

1 stop36h 20m

$862

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 3/1

5:00 am-5:00 pm

2 stops20h 00m

Seattle/Tacoma Intl

Sun 3/8

7:15 am-10:30 am

2 stops20h 15m

$866

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sat 3/14

6:15 am-4:40 pm

2 stops17h 25m

Seattle/Tacoma Intl

Tue 3/24

8:00 am-8:20 pm

3 stops29h 20m

$871

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 4/19

9:45 pm-9:53 pm

2 stops32h 08m

Seattle/Tacoma Intl

Sat 4/25

7:00 pm-9:20 pm

3 stops18h 20m

$878

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 3/23

11:25 am-12:25 pm

1 stop32h 00m

Seattle/Tacoma Intl

Mon 3/30

6:40 pm-10:00 pm

1 stop19h 20m

$880

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 3/23

11:25 am-12:25 pm

1 stop32h 00m

Seattle/Tacoma Intl

Mon 3/30

3:30 pm-3:30 pm

2 stops16h 00m

$890

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

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Porto 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

Prices

Airlines

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

You could potentially save up to 3% on your flight if you consider stops on a Porto to State of Washington flight.

Cheap Porto to State of Washington flight deals and tips

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

Fastest flight time	31h 40m
Direct flights	None

The fastest flight from Porto to State of Washington takes 31h 40m

There are no direct flights from Porto to State of Washington. There are no popular flight routes from Porto to State of Washington.

Search flight deals

When did momondo last update prices for flights from Porto Airport to Washington?
Prices for flights from Porto Airport to Washington are refreshed on a daily basis.
How old do you have to be to fly from Porto Airport to Washington?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport 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.

Why use momondo?

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

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

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

Yes. All flights to Washington from Porto on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Washington from Porto. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

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