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.

$850 Cheap Flights from Porto to Washington in 2025/26

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12:30 pm - 11:44 pmOPO-SEA

19h 14m2 stops

7:00 am - 9:30 amSEA-OPO

18h 30m2 stops

$850United Airlines

Find Deal

Wed, Nov 19 - Mon, Nov 24

12:30 pm - 11:44 pmOPO-SEA

19h 14m2 stops

7:10 am - 9:30 amSEA-OPO

18h 20m2 stops

$851United Airlines

Find Deal

Wed, Nov 19 - Sun, Nov 23

6:35 am - 11:45 amOPO-SEA

37h 10m1 stop

9:30 am - 10:30 amSEA-OPO

17h 00m2 stops

$852Multiple Airlines

Find Deal

Thu, Nov 13 - Tue, Nov 18

6:05 am - 8:36 pmOPO-SEA

22h 31m2 stops

9:30 am - 10:30 amSEA-OPO

17h 00m2 stops

$857Delta

Find Deal

Tue, Nov 18 - Mon, Nov 24

4:10 pm - 11:45 amOPO-SEA

27h 35m1 stop

2:05 pm - 10:30 amSEA-OPO

36h 25m1 stop

$858Multiple Airlines

Find Deal

Tue, Nov 18 - Mon, Nov 24

6:05 am - 10:23 pmOPO-SEA

24h 18m2 stops

7:30 am - 10:30 amSEA-OPO

19h 00m2 stops

$859Delta

Find Deal

Tue, Nov 18 - Mon, Nov 24

4:10 pm - 11:45 amOPO-SEA

27h 35m1 stop

9:28 am - 10:30 amSEA-OPO

17h 02m2 stops

$860KLM

Find Deal

Mon, Nov 17 - Mon, Nov 24

12:05 pm - 8:51 pmOPO-SEA

40h 46m2 stops

2:40 pm - 11:15 amSEA-OPO

36h 35m2 stops

$861SWISS

Find Deal

Tue, Nov 18 - Mon, Nov 24

11:15 am - 11:45 amOPO-SEA

32h 30m1 stop

3:00 pm - 10:30 amSEA-OPO

35h 30m1 stop

$862KLM

Find Deal

Tue, Nov 18 - Sun, Nov 23

12:05 pm - 8:51 pmOPO-SEA

40h 46m2 stops

2:40 pm - 11:15 amSEA-OPO

36h 35m2 stops

$948SWISS

Find Deal

Mon, Nov 17 - Mon, Nov 24

KLM flights from Porto to State of Washington

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

KLM

Nov 13

OPO6:35 amPorto

37h 10m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Nov 18

SEA3:00 pmSeattle/Tacoma Intl

23h 25m

1 stop

OPO10:25 pmPorto

$858

Find similar

KLM

Nov 17

OPO4:10 pmPorto

27h 35m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Nov 24

SEA9:28 amSeattle/Tacoma Intl

17h 02m

2 stops

OPO10:30 amPorto

$860

Find similar

KLM

Nov 18

OPO11:15 amPorto

32h 30m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Nov 23

SEA3:00 pmSeattle/Tacoma Intl

35h 30m

1 stop

OPO10:30 amPorto

$862

Find similar

United Airlines flights from Porto to State of Washington

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

United Airlines

Nov 19

OPO12:30 pmPorto

19h 14m

2 stops

SEA11:44 pmSeattle/Tacoma Intl

Nov 24

SEA7:00 amSeattle/Tacoma Intl

18h 30m

2 stops

OPO9:30 amPorto

$850

Find similar

United Airlines

Nov 19

OPO12:30 pmPorto

19h 14m

2 stops

SEA11:44 pmSeattle/Tacoma Intl

Nov 23

SEA7:10 amSeattle/Tacoma Intl

18h 20m

2 stops

OPO9:30 amPorto

$851

Find similar

United Airlines

Nov 19

OPO12:30 pmPorto

20h 29m

2 stops

SEA12:59 amSeattle/Tacoma Intl

Nov 24

SEA2:00 pmSeattle/Tacoma Intl

16h 55m

1 stop

OPO2:55 pmPorto

$855

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 11/19

12:30 pm-11:44 pm

2 stops19h 14m

Seattle/Tacoma Intl

Mon 11/24

7:00 am-9:30 am

2 stops18h 30m

$850

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 11/19

12:30 pm-11:44 pm

2 stops19h 14m

Seattle/Tacoma Intl

Sun 11/23

7:10 am-9:30 am

2 stops18h 20m

$851

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 11/13

6:35 am-11:45 am

1 stop37h 10m

Seattle/Tacoma Intl

Tue 11/18

9:30 am-10:30 am

2 stops17h 00m

$852

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 11/18

6:05 am-8:36 pm

2 stops22h 31m

Seattle/Tacoma Intl

Mon 11/24

9:30 am-10:30 am

2 stops17h 00m

$857

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 11/18

4:10 pm-11:45 am

1 stop27h 35m

Seattle/Tacoma Intl

Mon 11/24

2:05 pm-10:30 am

1 stop36h 25m

$858

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 11/18

6:05 am-10:23 pm

2 stops24h 18m

Seattle/Tacoma Intl

Mon 11/24

7:30 am-10:30 am

2 stops19h 00m

$859

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 11/17

4:10 pm-11:45 am

1 stop27h 35m

Seattle/Tacoma Intl

Mon 11/24

9:28 am-10:30 am

2 stops17h 02m

$860

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 11/18

12:05 pm-8:51 pm

2 stops40h 46m

Seattle/Tacoma Intl

Mon 11/24

2:40 pm-11:15 am

2 stops36h 35m

$861

PortoSeattle

OPO - SEA

OPOSEA

Porto

Tue 11/18

11:15 am-11:45 am

1 stop32h 30m

Seattle/Tacoma Intl

Sun 11/23

3:00 pm-10:30 am

1 stop35h 30m

$862

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 11/17

12:05 pm-8:51 pm

2 stops40h 46m

Seattle/Tacoma Intl

Mon 11/24

2:40 pm-11:15 am

2 stops36h 35m

$948

Flights are sorted by cheapest round-trip flights first.

Sorted 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 day to depart on your flight to State of Washington?

The cheapest day to depart from Porto to State of Washington is on a Monday. Travelers who choose to depart for State of Washington on a Monday will often find tickets for as low as $792. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Porto to State of Washington for around $1,114.

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

The cheapest time of day to fly to State of Washington is in the afternoon when flights can be purchased for as low as $792. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $934 on average. Flights to State of Washington from Porto in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You could potentially save up to 22% 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

Direct flights	None

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.

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Popular cities in Washington

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Flights to Seattlefrom $68

Cheap flights from Porto to Washington from $850

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Porto to Washington departing on 11/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Price Alerts

Price Alerts

Find the cheapest flights from Porto to Washington

Cheap round-trip flights

KLM flights from Porto to State of Washington

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

United Airlines flights from Porto to State of Washington

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

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Use the filters below to find and compare flights from Porto to Washington that are best for you.

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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 day to depart on your flight to State of Washington?

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

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

You could potentially save up to 22% 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

Direct flights

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

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

What documentation or ID do you need to fly to Washington?

Why use momondo?

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

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

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

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

An easier way to manage your State of Washington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo