$340 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 9/23. 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

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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Cheap Flights from Porto to District of Columbia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Washington, D.C.
Baltimore1 stop$437
Washington, D.C.
Baltimore1 stop$437

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

Thu, Sep 4 - Sat, Sep 20
TAP AIR PORTUGAL Logo
9:15 pm - 3:20 pmOPO-IAD
23h 05m1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 5:00 pmIAD-OPO
13h 25m1 stop
$478TAP AIR PORTUGAL
Find Deal
Thu, Sep 4 - Sat, Sep 20
TAP AIR PORTUGAL Logo
6:05 pm - 3:20 pmOPO-IAD
26h 15m1 stop
TAP AIR PORTUGAL Logo
5:00 pm - 11:15 pmIAD-OPO
25h 15m1 stop
$489TAP AIR PORTUGAL
Find Deal
Fri, Oct 10 - Thu, Oct 23
TAP AIR PORTUGAL Logo
10:35 pm - 8:05 pmOPO-IAD
26h 30m1 stop
TAP AIR PORTUGAL Logo
10:20 pm - 6:55 pmIAD-OPO
15h 35m1 stop
$493TAP AIR PORTUGAL
Find Deal
Thu, Sep 4 - Sat, Sep 20
Delta Logo
6:30 am - 3:35 pmOPO-IAD
14h 05m1 stop
Delta Logo
9:20 pm - 3:30 pmIAD-OPO
13h 10m1 stop
$548Delta
Find Deal
Thu, Sep 4 - Sat, Sep 20
Delta Logo
6:30 am - 3:35 pmOPO-IAD
14h 05m1 stop
Delta Logo
8:17 pm - 3:30 pmIAD-OPO
14h 13m2 stops
$551Delta
Find Deal
Wed, Dec 24 - Sat, Jan 3
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Lufthansa Logo
11:10 pm - 11:45 pmIAD-OPO
19h 35m1 stop
$558Lufthansa
Find Deal
Wed, Dec 24 - Sat, Jan 3
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Lufthansa Logo
11:10 pm - 11:45 pmIAD-OPO
19h 35m1 stop
$560Lufthansa
Find Deal
Mon, Jan 5 - Mon, Jan 12
United Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
United Airlines Logo
8:30 am - 2:55 pmIAD-OPO
25h 25m2 stops
$562United Airlines
Find Deal
Thu, Sep 4 - Sat, Sep 20
United Airlines Logo
12:35 pm - 9:36 pmOPO-DCA
14h 01m1 stop
United Airlines Logo
3:29 pm - 6:55 amDCA-OPO
10h 26m1 stop
$566United Airlines
Find Deal
Sun, Aug 24 - Sun, Aug 31
KLM Logo
5:00 am - 3:35 pmOPO-IAD
15h 35m1 stop
KLM Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$636KLM
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.

Which airlines provide the cheapest flights from Porto to District of Columbia?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Porto to District of Columbia were found on TAP AIR PORTUGAL ($478) and Delta ($548).


Good to know

Low seasonMay
Cheapest flight$340
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly and prices are also 6% 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 3 airlines serving 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.
7.8
KLMOverall score based on 1384 reviews
7.7Comfort
8.4Crew
7.8Boarding
7.1Entertainment
7.3Food
Airline reviews

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

6.0 GoodKathleen P, Jun 2025EDI - AMS
Read more KLM reviews

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

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

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.

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.

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

Overall very poor. Flight was disorganised, staff were rude and this is my second experience with KLM that I've had baggage go missing. It feels like, if you are an economy customer, KLM staff do not show you any care. I shall never fly with KLM again. Worst airline in Europe

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

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!

Flight was fine. Second meal ( fish sandwich on hard roll) was awful. My suitcase didn’t make the flight. It had been located, but won’t be delivered until tomorrow. Five days after flight

Boarding experience was awful. TAP claims I did not have check in luggage with tickets. I went 3-4 check in agents until I finally found a helpful kind agent who checked in my luggage with no fees. On top of that our flight was over 2 hours delayed with barely an apology or explanation.

The airport temperature at the airport and on the flight was too warm

Flight being delayed for 35 minutes had me lose the connection to my transport

Was the best airplane ✈️ ever that I never see I will traveling again again with u guys.

Flight was delayed on 6/20 to miss international connection. Next flight out was 24 hours later. Not acceptable.

Flight from FNC to OBO was cancelled. We were rebooked to Lisbon later in the day. It was inconvenient but it worked out ok in the end.

Terrible flight attendant attitude. Average 3-star hotel employee has better hospitality skills. Business class seats are literally a joke. TAP executives should ride business class in other airlines to develop some rudimentary sense of what business class is.

Very pleasant flight, crew was very nice. The flight was really smooth, big plane. The seats are kind of close together, so comfort was just OK. The boarding process on the way back to New York was a little chaotic. It took a long time.There were no announcements, no loudspeaker just one staff yelling out of instructions and a lot of people crowding in before their term to board. So that could really be improved a lot.

Liked the flight being almost on time (airport issues created a delay). Disliked the issue printing tag bags on the kiosk and having to wait for an hour on like to drop my bags.

Our flight was delayed for over an hour due to weather, and it had already been a long travel day. However, the crew was calm and compassionate, listening to every complaint with genuine concern. They got us home safely without incident, in spite of all of the obstacles. I’m grateful.

The flight crew was friendly and accommodating. I witnessed one of the flight attendants deal with a difficult flyer with extreme calm and compassion. I was so annoyed with the passenger and so impressed by the flight attendant. His quick action de-escalated what could have been a major incident. He was awesome.

Insulting. Lufthansa flight from Munich to EWR had us getting our luggage when we were told in Florence that it would follow us to Indianapolis. It did not. Then very slow security in EWR caused me and three other passengers from Lufthansa flight from Munich to miss the boarding closure. Behind me were two elderly grandparents and their ten year old grandson. We were all refused entry on a plane to Indy that was still at the gate. The doors had not even closed inside the terminal yet. No apologies or compensation offered. Not even a meal voucher let alone a free hotel stay for our inconvenience. I m not sure what the other three passengers behind me did ( they were elderly with a grandson, recall), but I stated 12 hours overnight in a chilly EWR airport until next flight to Indy at 850 next morning.

I was told in Florence my bag would go directly to Indianapolis. I had to wait to get it. Then security in EWR was slow so I missed my flight as United would not allow me on the plane even though it was still on the tarmac and the door to the tunnel was open. I blame both Lufthansa and United for refusing to allow me on board a plane that was clearly still on the tarmac. Behind me two grandparents and their ten year old grandson were on same flight from Munich to EWR. They were refused to board the United flight. So we had to sit for 12 hours in airport until next flight. No compensation has been offered either by Lufthansa or United.

Flight was delayed and luggage was delivered day after arrival. In Bilbao they told me day after would be delivered faster if I went to Bilbao to get my own bags so I did. Wasted my morning.

Seating was average for a first class seat. It very modern. I expected better.

very small seats screen did not work . I could not watch anything for 9 hours

The food that was served was superb!!! Awesome snacks!!! Frequent drink service!!! To me, this was shocking. I took a British Airways flight from Denver to London for the first leg of my trip and the food was horrendous. Thank you for keeping us fed and satiated on such a long flight!!!!

The seating arrangement by having privacy screens would have been more appealing. If you sit in the business class, you pay for extra comfort and privacy. Other than that, the service was excellent and the staff very professional.

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

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