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.

$489 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.

10:00 pm - 5:10 pm

OPO

SEA

27h 10m

2 stops

7:10 pm - 11:10 pm

SEA

OPO

20h 00m

1 stop

$844Multiple Airlines

Wed, May 27 - Tue, Jun 2

4:50 pm - 5:10 pm

OPO

SEA

32h 20m

2 stops

7:10 pm - 1:10 pm

SEA

OPO

34h 00m

2 stops

$909Multiple Airlines

Wed, May 27 - Tue, Jun 2

8:25 am - 9:40 am

OPO

SEA

33h 15m

3 stops

3:40 pm - 9:55 am

SEA

OPO

34h 15m

3 stops

$912Multiple Airlines

Wed, May 27 - Tue, Jun 2

8:25 am - 9:40 am

OPO

SEA

33h 15m

3 stops

7:00 pm - 8:25 pm

SEA

OPO

17h 25m

2 stops

$921Multiple Airlines

Wed, May 27 - Thu, Jun 4

8:25 am - 9:40 am

OPO

SEA

33h 15m

3 stops

7:00 pm - 1:05 pm

SEA

OPO

34h 05m

3 stops

$922Multiple Airlines

Wed, May 27 - Thu, Jun 4

10:00 pm - 8:40 pm

OPO

SEA

30h 40m

3 stops

3:40 pm - 11:20 pm

SEA

OPO

23h 40m

2 stops

$936Multiple Airlines

Mon, Jun 22 - Mon, Jun 29

10:00 pm - 5:55 pm

OPO

SEA

27h 55m

3 stops

7:00 pm - 11:20 pm

SEA

OPO

20h 20m

2 stops

$941Multiple Airlines

Mon, Jun 22 - Mon, Jun 29

10:00 pm - 8:40 pm

OPO

SEA

30h 40m

3 stops

3:40 pm - 9:20 pm

SEA

OPO

21h 40m

3 stops

$967Multiple Airlines

Mon, Jun 22 - Mon, Jun 29

10:00 pm - 8:40 pm

OPO

SEA

30h 40m

3 stops

3:40 pm - 9:20 pm

SEA

OPO

21h 40m

3 stops

$977Multiple Airlines

Mon, Jun 22 - Mon, Jun 29

10:45 am - 5:15 pm

OPO

SEA

38h 30m

1 stop

7:10 pm - 10:00 am

SEA

OPO

30h 50m

1 stop

$988Turkish Airlines

Wed, May 27 - Tue, Jun 2

Lufthansa flights from Porto to State of Washington

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

Lufthansa

Aug 18

OPO6:20 amPorto

18h 39m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

Aug 28

SEA2:10 pmSeattle/Tacoma Intl

24h 35m

1 stop

OPO10:45 pmPorto

$1,163

Lufthansa

Aug 18

OPO4:35 pmPorto

27h 20m

1 stop

SEA11:55 amSeattle/Tacoma Intl

Aug 28

SEA2:10 pmSeattle/Tacoma Intl

24h 35m

1 stop

OPO10:45 pmPorto

$1,227

Air Canada flights from Porto to State of Washington

Our best Air Canada deals on Porto to State of Washington flight tickets

Air Canada

May 15

OPO6:20 amPorto

24h 20m

2 stops

SEA10:40 pmSeattle/Tacoma Intl

May 19

SEA10:45 amSeattle/Tacoma Intl

22h 50m

2 stops

OPO5:35 pmPorto

$1,182

Air Canada

Aug 18

OPO12:15 pmPorto

18h 33m

2 stops

SEA10:48 pmSeattle/Tacoma Intl

Aug 28

SEA5:45 amSeattle/Tacoma Intl

17h 15m

2 stops

OPO7:00 amPorto

$1,186

Air Canada

Oct 28

OPO11:00 amPorto

29h 51m

3 stops

SEA9:51 amSeattle/Tacoma Intl

Nov 21

SEA7:05 pmSeattle/Tacoma Intl

36h 10m

2 stops

OPO3:15 pmPorto

$5,930

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 5/27

10:00 pm-5:10 pm

2 stops27h 10m

Seattle/Tacoma Intl

Tue 6/2

7:10 pm-11:10 pm

1 stop20h 00m

$844

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 5/27

4:50 pm-5:10 pm

2 stops32h 20m

Seattle/Tacoma Intl

Tue 6/2

7:10 pm-1:10 pm

2 stops34h 00m

$909

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 5/27

8:25 am-9:40 am

3 stops33h 15m

Seattle/Tacoma Intl

Tue 6/2

3:40 pm-9:55 am

3 stops34h 15m

$912

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 5/27

8:25 am-9:40 am

3 stops33h 15m

Seattle/Tacoma Intl

Thu 6/4

7:00 pm-8:25 pm

2 stops17h 25m

$921

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 5/27

8:25 am-9:40 am

3 stops33h 15m

Seattle/Tacoma Intl

Thu 6/4

7:00 pm-1:05 pm

3 stops34h 05m

$922

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 6/22

10:00 pm-8:40 pm

3 stops30h 40m

Seattle/Tacoma Intl

Mon 6/29

3:40 pm-11:20 pm

2 stops23h 40m

$936

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 6/22

10:00 pm-5:55 pm

3 stops27h 55m

Seattle/Tacoma Intl

Mon 6/29

7:00 pm-11:20 pm

2 stops20h 20m

$941

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 6/22

10:00 pm-8:40 pm

3 stops30h 40m

Seattle/Tacoma Intl

Mon 6/29

3:40 pm-9:20 pm

3 stops21h 40m

$967

PortoSeattle

OPO - SEA

OPOSEA

Porto

Mon 6/22

10:00 pm-8:40 pm

3 stops30h 40m

Seattle/Tacoma Intl

Mon 6/29

3:40 pm-9:20 pm

3 stops21h 40m

$977

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 5/27

10:45 am-5:15 pm

1 stop38h 30m

Seattle/Tacoma Intl

Tue 6/2

7:10 pm-10:00 am

1 stop30h 50m

$988

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

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 13% 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	22h 03m
Direct flights	None

The fastest flight from Porto to State of Washington takes 22h 03m

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.