$339 Find Cheap Flights from Porto to District of Columbia

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 District of Columbia departing on 12/18. 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 District of Columbia

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

Book Cheap Porto to District of Columbia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to District of Columbia 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Porto to District of Columbia

Fri, Nov 21 - Thu, Dec 4
Scandinavian Airlines Logo
5:35 pm - 6:50 pmOPO-IAD
30h 15m1 stop
Scandinavian Airlines Logo
8:30 pm - 4:55 pmIAD-OPO
15h 25m1 stop
$519Scandinavian Airlines
Find Deal
Thu, Dec 11 - Fri, Dec 26
TAP AIR PORTUGAL Logo
9:00 am - 3:15 pmOPO-IAD
11h 15m1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 3:55 pmIAD-OPO
12h 25m1 stop
$565TAP AIR PORTUGAL
Find Deal
Sat, Nov 22 - Sun, Apr 5
KLM Logo
6:00 am - 4:05 pmOPO-IAD
15h 05m1 stop
KLM Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$572KLM
Find Deal
Mon, Nov 24 - Mon, Dec 1
Delta Logo
6:30 am - 4:05 pmOPO-IAD
14h 35m1 stop
Delta Logo
6:50 pm - 10:30 amIAD-OPO
10h 40m1 stop
$573Delta
Find Deal
Fri, Nov 21 - Sat, Apr 4
Delta Logo
6:30 am - 7:08 pmOPO-IAD
17h 38m2 stops
Delta Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$577Delta
Find Deal
Fri, Nov 21 - Sun, Apr 5
KLM Logo
6:30 am - 7:08 pmOPO-IAD
17h 38m2 stops
KLM Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$582KLM
Find Deal
Thu, Nov 20 - Thu, Apr 2
United Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
United Airlines Logo
5:20 pm - 9:45 amIAD-OPO
11h 25m1 stop
$584United Airlines
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Sat, Nov 22 - Sun, Apr 5
Multiple Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Multiple Airlines Logo
8:45 pm - 6:30 pmIAD-OPO
16h 45m1 stop
$587Multiple Airlines
Find Deal
Sun, Nov 23 - Sat, Apr 4
Multiple Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Multiple Airlines Logo
8:45 pm - 6:30 pmIAD-OPO
16h 45m1 stop
$589Multiple Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
United Airlines Logo
6:00 am - 11:49 amOPO-IAD
34h 49m2 stops
United Airlines Logo
12:50 pm - 11:40 amIAD-OPO
17h 50m2 stops
$594United Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Porto to District of Columbia flights

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

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

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

If you are looking for a flight deal from Porto to District of Columbia, look for departures on Mondays and avoid leaving on a Wednesday, as it's usually the priciest day. When flying back from District of Columbia, Sunday is the cheapest day to fly and Friday is the most expensive.

Good to know

Low seasonMay
Cheapest flight$339
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from Porto to Washington Dulles Airport

FAQs - booking District of Columbia flights

  • How does KAYAK find such low prices on flights from Porto to District of Columbia?

    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 District of Columbia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Porto to District of Columbia 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 District of Columbia?

    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 District of Columbia 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 District of Columbia?

    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 District of Columbia 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 District of Columbia?

    The cheapest time of day to fly to District of Columbia is generally in the morning, when round-trip flights cost $735 on average. Morning departures are around 31% cheaper than evening flights, on average. The most expensive time of day to fly to District of Columbia is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,068.

Reviews of the top airline flying from Porto to District of Columbia

 
See real verified KAYAK customer reviews for airlines flying from Porto to District of Columbia. 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 District of Columbia? 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.
7.1
TAP AIR PORTUGALOverall score based on 2037 reviews
7.1Comfort
6.3Entertainment
6.2Food
7.0Boarding
7.8Crew
Airline reviews

There was no warning that they have added passport control after check in, the line was enormous and after 46 mins wait we missed our flight. Were forced to leave the airport and purchase new tickets at full price to board a later flight. TAP were unsympathetic and unhelpful.

2.0 MediocreAnonymous, Oct 2025LIS - LHR
Read more TAP AIR PORTUGAL reviews

There was no warning that they have added passport control after check in, the line was enormous and after 46 mins wait we missed our flight. Were forced to leave the airport and purchase new tickets at full price to board a later flight. TAP were unsympathetic and unhelpful.

Boarding we were jammed into a hot crowded bus waiting too long while another bus went in front of us. Appreciated blanket and pillow, movie available helped time pass, the food was not appealing so I had my own snacks, the flight is long, but nothing they can do about that. Staff adequate, flight good.

Did not enjoy the meal provided. The aircraft was dirty. For instance, the screen seemed to have been cleaned with a dirty rag. Disgusting.

The person at the checkin was very helpful. We couldn’t check in through the keyosk, but the agent was very helpful.

Great price for really nice seats and the plane and staff were great, only 5-10 minute delays!

Tap was very frustrating in Lisbon. Not enough direction and help. Mixed messages of where we needed to go. Seats were not very comfortable.

Everything went as expected. Luggage arrived at my same destination and nothing disturbed my vacation.

This flight arrived late. We joined well over a thousand of other people waiting to go through customs. Air Portugal has lost my bag. We had to chase down a representative even though we had waited at the baggage claim for well over 1 hour and 35 minutes for baggage to come. No representative was there to explain the delay or to give any direction. After 1 hour and 35 minutes at least four passengers had no baggage to pick up or had a fraction of their baggage. The representative was a young woman who clearly did not have the experience to deal with what was happening. Very disappointing as of course we were dealing with great amount of jet lag and having been up for 24 hours at that point and not being able to have any of the things necessary at home that were contained in the bag was quite upsetting. That instant occurred last night at approximately 11:15 p.m. and as of 12:30 p.m. the next day I have not heard anything from Air Portugal.

Check-in guidance for transfer flight, boarding, in-flight service, seat comfort, etc.

Very rude person at the boarding desk; flight attendant coughing 3 inches from my face three times- not even covering her mouth; boarding process very unacceptable for older people with stairs to all planes (are you all stuck in the 1960’s?). I am sure that I am not remembering all of the negative things, but I am sure you get the message!

Everything you need to know for your flight from Porto to District of Columbia

Information on your arrival and departure airports

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