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.

$377 Cheap Flights from Porto to Washington in 2026

Find the cheapest flights from Porto to Washington

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:55 pm - 1:45 pm

OPO

SEA

27h 50m

1 stop

3:55 pm - 5:05 pm

SEA

OPO

17h 10m

1 stop

$933Scandinavian Airlines

Fri, Sep 11 - Sat, Sep 19

7:00 pm - 4:35 pm

OPO

SEA

29h 35m

1 stop

6:45 pm - 10:00 pm

SEA

OPO

19h 15m

1 stop

$935Multiple Airlines

Sun, Sep 13 - Sun, Sep 20

5:00 am - 11:52 am

OPO

SEA

14h 52m

1 stop

11:08 am - 3:30 pm

SEA

OPO

20h 22m

2 stops

$936Delta

Wed, Oct 7 - Sun, Oct 11

12:25 pm - 12:15 am

OPO

SEA

19h 50m

2 stops

3:10 pm - 11:45 am

SEA

OPO

36h 35m

2 stops

$937Iberia

Tue, Oct 6 - Sat, Oct 10

5:00 am - 11:47 am

OPO

SEA

14h 47m

1 stop

6:00 am - 10:40 am

SEA

OPO

20h 40m

2 stops

$941Delta

Tue, Sep 15 - Sun, Sep 20

5:00 am - 4:52 pm

OPO

SEA

19h 52m

2 stops

11:08 am - 3:30 pm

SEA

OPO

20h 22m

2 stops

$942Delta

Wed, Oct 7 - Sun, Oct 11

6:30 am - 10:45 pm

OPO

SEA

48h 15m

2 stops

10:42 am - 3:40 pm

SEA

OPO

44h 58m

2 stops

$944Turkish Airlines

Mon, Sep 14 - Fri, Sep 18

5:00 am - 6:45 pm

OPO

SEA

21h 45m

2 stops

9:30 am - 10:40 am

SEA

OPO

17h 10m

2 stops

$947Delta

Tue, Sep 15 - Sun, Sep 20

4:35 pm - 11:55 am

OPO

SEA

27h 20m

1 stop

2:10 pm - 3:40 pm

SEA

OPO

17h 30m

1 stop

$955Lufthansa

Mon, Aug 24 - Sun, Aug 30

6:35 pm - 3:40 pm

OPO

SEA

29h 05m

2 stops

6:00 pm - 8:10 am

SEA

OPO

30h 10m

3 stops

$956Multiple Airlines

Tue, Aug 18 - Fri, Aug 28

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Turkish Airlines flights from Porto to State of Washington

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

Turkish Airlines

Sep 14

OPO6:30 amPorto

48h 15m

2 stops

SEA10:45 pmSeattle/Tacoma Intl

Sep 18

SEA10:42 amSeattle/Tacoma Intl

44h 58m

2 stops

OPO3:40 pmPorto

$944

Turkish Airlines

Sep 14

OPO4:50 pmPorto

37h 55m

2 stops

SEA10:45 pmSeattle/Tacoma Intl

Sep 19

SEA7:15 pmSeattle/Tacoma Intl

36h 35m

1 stop

OPO3:50 pmPorto

$959

Turkish Airlines

Oct 3

OPO4:40 pmPorto

32h 40m

1 stop

SEA5:20 pmSeattle/Tacoma Intl

Oct 9

SEA10:42 amSeattle/Tacoma Intl

39h 03m

2 stops

OPO9:45 amPorto

$984

Delta flights from Porto to State of Washington

Our best Delta deals on Porto to State of Washington flight tickets

Delta

Oct 7

OPO5:00 amPorto

14h 52m

1 stop

SEA11:52 amSeattle/Tacoma Intl

Oct 11

SEA11:08 amSeattle/Tacoma Intl

20h 22m

2 stops

OPO3:30 pmPorto

$936

Delta

Sep 15

OPO5:00 amPorto

14h 47m

1 stop

SEA11:47 amSeattle/Tacoma Intl

Sep 20

SEA6:00 amSeattle/Tacoma Intl

20h 40m

2 stops

OPO10:40 amPorto

$941

Delta

Oct 7

OPO5:00 amPorto

19h 52m

2 stops

SEA4:52 pmSeattle/Tacoma Intl

Oct 11

SEA11:08 amSeattle/Tacoma Intl

20h 22m

2 stops

OPO3:30 pmPorto

$942

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 9/11

5:55 pm-1:45 pm

1 stop27h 50m

Seattle/Tacoma Intl

Sat 9/19

3:55 pm-5:05 pm

1 stop17h 10m

$933

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 9/13

7:00 pm-4:35 pm

1 stop29h 35m

Seattle/Tacoma Intl

Sun 9/20

6:45 pm-10:00 pm

1 stop19h 15m

$935

Quickest round-trip

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 10/7

5:00 am-11:52 am

1 stop14h 52m

Seattle/Tacoma Intl

Sun 10/11

11:08 am-3:30 pm

2 stops20h 22m

$936

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 10/6

12:25 pm-12:15 am

2 stops19h 50m

Seattle/Tacoma Intl

Sat 10/10

3:10 pm-11:45 am

2 stops36h 35m

$937

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 9/15

5:00 am-11:47 am

1 stop14h 47m

Seattle/Tacoma Intl

Sun 9/20

6:00 am-10:40 am

2 stops20h 40m

$941

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 10/7

5:00 am-4:52 pm

2 stops19h 52m

Seattle/Tacoma Intl

Sun 10/11

11:08 am-3:30 pm

2 stops20h 22m

$942

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 9/14

6:30 am-10:45 pm

2 stops48h 15m

Seattle/Tacoma Intl

Fri 9/18

10:42 am-3:40 pm

2 stops44h 58m

$944

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 9/15

5:00 am-6:45 pm

2 stops21h 45m

Seattle/Tacoma Intl

Sun 9/20

9:30 am-10:40 am

2 stops17h 10m

$947

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 8/24

4:35 pm-11:55 am

1 stop27h 20m

Seattle/Tacoma Intl

Sun 8/30

2:10 pm-3:40 pm

1 stop17h 30m

$955

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 8/18

6:35 pm-3:40 pm

2 stops29h 05m

Seattle/Tacoma Intl

Fri 8/28

6:00 pm-8:10 am

3 stops30h 10m

$956

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

What is the cheapest month to fly to State of Washington?

The month of February is, on average, the cheapest month to fly to State of Washington from Porto, with most prices found around $0. If you aren’t able to travel to State of Washington during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $793.

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

You could potentially save up to 18% 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	29h 05m
Direct flights	None

The fastest flight from Porto to State of Washington takes 29h 05m

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

Frequently asked questions about flying 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.

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.