$386 Find Cheap Flights from Porto to Washington

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Porto to Washington departing on 5/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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KAYAK searches hundreds of travel sites at once for deals on flights to Washington

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to Washington, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to Washington, as well as popular online travel agencies
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Best Washington Flight Deals from Porto

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Seattle
Seattle1 stop$743
Portland
Portland2 stops$841
Seattle
Seattle1 stop$743
Portland
Portland2 stops$841

Cheap Flights from Porto to Washington

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to Washington that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Porto to Washington

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Porto to Washington.
Discover the best prices for you by selecting your travel dates on KAYAK.
Scandinavian Airlines Logo
5:55 pm - 1:50 pmOPO-SEA
27h 55m1 stop
Scandinavian Airlines Logo
4:00 pm - 11:10 amSEA-OPO
35h 10m1 stop
$743Scandinavian Airlines
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Fri, May 23 - Sat, May 31
Scandinavian Airlines Logo
5:55 pm - 1:50 pmOPO-SEA
27h 55m1 stop
Scandinavian Airlines Logo
4:00 pm - 11:10 amSEA-OPO
35h 10m1 stop
$747Scandinavian Airlines
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Fri, May 23 - Sat, May 31
Logo
6:00 am - 9:36 pmOPO-SEA
47h 36m2 stops
Logo
9:40 pm - 10:30 amSEA-OPO
28h 50m1 stop
$833
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Fri, May 23 - Sat, May 31
KLM Logo
6:20 pm - 11:40 amOPO-SEA
25h 20m1 stop
KLM Logo
5:35 pm - 4:45 pmSEA-OPO
15h 10m1 stop
$836KLM
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Sun, Jun 1 - Sun, Jun 15
Delta Logo
6:40 am - 8:50 pmOPO-SEA
22h 10m2 stops
Delta Logo
6:07 pm - 3:35 pmSEA-OPO
13h 28m1 stop
$841Delta
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Fri, May 23 - Sat, May 31
United Airlines Logo
6:00 am - 12:25 pmOPO-SEA
14h 25m1 stop
United Airlines Logo
12:20 pm - 9:45 amSEA-OPO
13h 25m1 stop
$850United Airlines
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Fri, Jun 13 - Fri, Jun 20
Logo
6:15 am - 4:59 pmOPO-SEA
18h 44m1 stop
Logo
5:30 am - 6:15 pmSEA-OPO
28h 45m2 stops
$919
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Sun, Jun 1 - Sun, Jun 15
United Airlines Logo
6:00 am - 4:59 pmOPO-SEA
18h 59m2 stops
United Airlines Logo
7:00 am - 9:45 amSEA-OPO
18h 45m2 stops
$926United Airlines
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Fri, Jun 13 - Fri, Jun 20
KLM Logo
6:20 pm - 2:31 pmOPO-SEA
28h 11m2 stops
KLM Logo
7:20 am - 3:30 pmSEA-OPO
24h 10m2 stops
$939KLM
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Sun, Jun 1 - Sun, Jun 15
Delta Logo
6:40 am - 10:21 pmOPO-SEA
23h 41m2 stops
Delta Logo
11:55 am - 3:35 pmSEA-OPO
19h 40m2 stops
$952Delta
Find Deal
Fri, May 23 - Sat, May 31
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KAYAK's insights & trends for Porto to Washington flights

Get data-powered insights and trends into flights from Porto to Washington to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Porto to Washington?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Porto to Washington, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Porto to Washington is October, when tickets cost $332 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,166 and $1,059 respectively.

What’s the cheapest day of the week to fly from Porto to Washington?

The average price of all round-trip flights from Porto to Washington clicked on KAYAK for each day over the last 12 months.

For Porto to Washington, Monday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Washington back to Porto, the best deals are generally found on Tuesday, with Thursday being the most expensive.

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Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$386
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly with an average 21% increase in price.
Flight from Porto to Seattle

FAQs - booking Washington flights

  • How does KAYAK find such low prices on flights from Porto to Washington?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Porto to Washington.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Porto to Washington?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Porto to Washington is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Porto to Washington?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Porto to Washington with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Porto to Washington?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Porto to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Washington?

    The cheapest time of day to fly to Washington is generally in the evening, when round-trip flights cost $792 on average. Morning departures are around 20% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is $934.

Top airline flying from Porto to Washington

 
See real verified KAYAK customer reviews for airlines flying from Porto to Washington. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Porto to Washington? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1334 reviews
7.1Entertainment
8.4Crew
7.8Boarding
7.2Food
7.7Comfort
Airline reviews

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

8.0 ExcellentAnonymous, Apr 2025AMS - MAN
Read more KLM reviews

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

Great boarding, great short flight but no entertainment whatsoever and no wifi. Prepare to disembark by a staircase.

Everything you need to know for your flight from Porto to Washington

Information on your arrival and departure airports

Porto (OPO)

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