$439 Find Cheap Flights from Portugal to Washington - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portugal to Washington departing on 9/9. 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.
1 adult
1 adult, Economy, 0 bags

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 for flights to Washington, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Washington, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Booking Insights

KAYAK's insights & trends for flights to Washington

Get data-powered insights and trends for flights 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 Portugal to Washington?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Portugal 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 Portugal to Washington is May, when tickets cost $501 (return) on average. On the other hand, the most expensive months are January and February, when the average cost of round-trip tickets is $855 and $670 respectively.

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Good to know

Low seasonFebruary
Cheapest flight$439
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Lisbon to Portland

FAQs for booking flights from Portugal to Washington

  • How does KAYAK find such low prices on flights from Portugal 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 Portugal to Washington.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Portugal 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 Portugal 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 Portugal 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 Portugal 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 Portugal to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Portugal to Washington

 
See real verified KAYAK customer reviews for airlines flying to Washington. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Portugal to Washington. 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 Portugal 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
DeltaOverall score based on 8420 reviews
8.5Crew
8.1Boarding
7.8Comfort
7.2Food
7.8Entertainment
Airline reviews

Flight got canceled 4 times, missed my connecting flight due to delays, have to wait to go home tomorrow

2.0 MediocreChelsea, Jun 2026
DAL - ATL
Read more Delta reviews

Flight got canceled 4 times, missed my connecting flight due to delays, have to wait to go home tomorrow

Third flight in two months where the crew was not there. Comfort seating does not guarantee overhead bin space. Passengers with children are allowed on the plane first - if you are flying to and from Orlando, this means half the plane has boarded before you get on. And somehow all the bin space is taken up. 3 out of 5 flights have had issues with equipment or procedure. Some of these instances caused the flight to be delayed because of a "nuisance" light. One time it was a bag that had been brought on board but did not belong to anyone so we had to return to the gate. Last night we were told the "AC" on the plane doesn't work well and we're 10th for take off- because the crew was late - and that it will get cool when we're in the air. Not sure if this is usual, but I didn't think flight crew could jump seat in first class. Movie and TV selection has not been refreshed for several months- flying one to two round trips each month easily exhausts the list of content.

Great experience nice pilot very soft and easy landing and take off

We sat on the runway for over an hour before departure. That was unwelcome.

Horrible. Faucet in sink not working, wifi not working. Didn’t bring food or snacks

Flight was delayed before take off and at landing. Baggage took 20 minutes. Flight crew would not serve full soft drink and had to ask multiple times before receiving water.

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

Crew helpful. Plenty of food although not great but ok. Good time.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Everything you need to know for your flight to Washington

Cabin class types available on flights to Washington

Cabin classes available on flights to Washington. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to Washington
Business Class flights to Washington
Premium Economy Class flights to Washington
Economy Class flights to Washington