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.

$355 Cheap Flights from Porto to Washington in 2026

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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.

10:30 am - 1:45 pm

OPO

SEA

35h 15m

1 stop

3:55 pm - 9:40 am

SEA

OPO

33h 45m

1 stop

$772Scandinavian Airlines

Thu, May 21 - Tue, May 26

7:10 am - 9:40 am

OPO

SEA

34h 30m

2 stops

3:40 pm - 9:00 am

SEA

OPO

33h 20m

3 stops

$784Multiple Airlines

Fri, May 15 - Sun, May 24

8:25 am - 9:40 am

OPO

SEA

33h 15m

3 stops

3:40 pm - 10:00 am

SEA

OPO

34h 20m

3 stops

$934Multiple Airlines

Fri, May 15 - Sun, May 24

8:25 am - 9:40 am

OPO

SEA

33h 15m

3 stops

3:40 pm - 12:40 am

SEA

OPO

25h 00m

3 stops

$935Multiple Airlines

Wed, May 13 - Sun, May 24

8:50 am - 10:40 pm

OPO

SEA

21h 50m

3 stops

3:40 pm - 8:30 pm

SEA

OPO

20h 50m

2 stops

$937Multiple Airlines

Thu, May 14 - Sun, May 24

5:00 am - 11:42 am

OPO

SEA

14h 42m

1 stop

1:30 pm - 3:25 pm

SEA

OPO

17h 55m

1 stop

$956KLM

Fri, May 15 - Sun, May 24

6:00 am - 9:56 pm

OPO

SEA

23h 56m

2 stops

11:56 pm - 6:55 am

SEA

OPO

22h 59m

2 stops

$960United Airlines

Wed, Sep 2 - Thu, Sep 10

6:00 am - 9:10 pm

OPO

SEA

23h 10m

2 stops

7:40 am - 9:45 am

SEA

OPO

18h 05m

2 stops

$961United Airlines

Thu, May 21 - Mon, May 25

6:20 am - 4:59 pm

OPO

SEA

18h 39m

1 stop

10:45 am - 6:15 pm

SEA

OPO

23h 30m

2 stops

$962Multiple Airlines

Sun, May 10 - Sun, May 17

6:00 am - 10:59 pm

OPO

SEA

24h 59m

2 stops

2:10 pm - 3:40 pm

SEA

OPO

17h 30m

1 stop

$964United Airlines

Fri, May 15 - Sun, May 24

Delta flights from Porto to State of Washington

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

Delta

Sep 2

OPO5:00 amPorto

17h 45m

2 stops

SEA2:45 pmSeattle/Tacoma Intl

Sep 10

SEA6:45 pmSeattle/Tacoma Intl

19h 15m

1 stop

OPO10:00 pmPorto

$966

Delta

May 15

OPO5:00 amPorto

21h 49m

2 stops

SEA6:49 pmSeattle/Tacoma Intl

May 24

SEA6:40 pmSeattle/Tacoma Intl

19h 20m

1 stop

OPO10:00 pmPorto

$967

Delta

May 13

OPO5:00 amPorto

19h 44m

2 stops

SEA4:44 pmSeattle/Tacoma Intl

May 24

SEA7:30 amSeattle/Tacoma Intl

19h 10m

2 stops

OPO10:40 amPorto

$971

United Airlines flights from Porto to State of Washington

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

United Airlines

Sep 2

OPO6:00 amPorto

23h 56m

2 stops

SEA9:56 pmSeattle/Tacoma Intl

Sep 10

SEA11:56 pmSeattle/Tacoma Intl

22h 59m

2 stops

OPO6:55 amPorto

$960

United Airlines

May 21

OPO6:00 amPorto

23h 10m

2 stops

SEA9:10 pmSeattle/Tacoma Intl

May 25

SEA7:40 amSeattle/Tacoma Intl

18h 05m

2 stops

OPO9:45 amPorto

$961

United Airlines

May 15

OPO6:00 amPorto

25h 29m

3 stops

SEA11:29 pmSeattle/Tacoma Intl

May 24

SEA2:10 pmSeattle/Tacoma Intl

17h 30m

1 stop

OPO3:40 pmPorto

$964

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 5/21

10:30 am-1:45 pm

1 stop35h 15m

Seattle/Tacoma Intl

Tue 5/26

3:55 pm-9:40 am

1 stop33h 45m

$772

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 5/15

7:10 am-9:40 am

2 stops34h 30m

Seattle/Tacoma Intl

Sun 5/24

3:40 pm-9:00 am

3 stops33h 20m

$784

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 5/15

8:25 am-9:40 am

3 stops33h 15m

Seattle/Tacoma Intl

Sun 5/24

3:40 pm-10:00 am

3 stops34h 20m

$934

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 5/13

8:25 am-9:40 am

3 stops33h 15m

Seattle/Tacoma Intl

Sun 5/24

3:40 pm-12:40 am

3 stops25h 00m

$935

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 5/14

8:50 am-10:40 pm

3 stops21h 50m

Seattle/Tacoma Intl

Sun 5/24

3:40 pm-8:30 pm

2 stops20h 50m

$937

Quickest round-trip

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 5/15

5:00 am-11:42 am

1 stop14h 42m

Seattle/Tacoma Intl

Sun 5/24

1:30 pm-3:25 pm

1 stop17h 55m

$956

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 9/2

6:00 am-9:56 pm

2 stops23h 56m

Seattle/Tacoma Intl

Thu 9/10

11:56 pm-6:55 am

2 stops22h 59m

$960

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 5/21

6:00 am-9:10 pm

2 stops23h 10m

Seattle/Tacoma Intl

Mon 5/25

7:40 am-9:45 am

2 stops18h 05m

$961

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 5/10

6:20 am-4:59 pm

1 stop18h 39m

Seattle/Tacoma Intl

Sun 5/17

10:45 am-6:15 pm

2 stops23h 30m

$962

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 5/15

6:00 am-10:59 pm

2 stops24h 59m

Seattle/Tacoma Intl

Sun 5/24

2:10 pm-3:40 pm

1 stop17h 30m

$964

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

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

You could potentially save up to 9% 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	14h 37m
Direct flights	None

The fastest flight from Porto to State of Washington takes 14h 37m

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.