$379 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 6/17. 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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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

Mon, Apr 13 - Sun, Apr 26
TAP AIR PORTUGAL Logo
11:00 am - 8:35 pm
OPO
-
IAD
14h 35m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 3:00 pm
IAD
-
OPO
11h 25m
1 stop
$520TAP AIR PORTUGAL
Thu, Apr 9 - Fri, Apr 24
TAP AIR PORTUGAL Logo
9:00 am - 3:10 pm
OPO
-
IAD
11h 10m
1 stop
TAP AIR PORTUGAL Logo
5:05 pm - 8:00 am
IAD
-
OPO
9h 55m
1 stop
$541TAP AIR PORTUGAL
Mon, Apr 13 - Sun, Apr 26
TAP AIR PORTUGAL Logo
10:30 pm - 3:10 pm
OPO
-
IAD
21h 40m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 3:00 pm
IAD
-
OPO
11h 25m
1 stop
$545TAP AIR PORTUGAL
Mon, Apr 13 - Sun, Apr 26
TAP AIR PORTUGAL Logo
10:30 pm - 3:10 pm
OPO
-
IAD
21h 40m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 3:00 pm
IAD
-
OPO
11h 25m
1 stop
$549TAP AIR PORTUGAL
Thu, Apr 2 - Thu, Apr 16
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
Lufthansa Logo
10:20 pm - 11:25 pm
IAD
-
OPO
20h 05m
1 stop
$605Lufthansa
Fri, May 1 - Fri, May 8
SWISS Logo
8:40 am - 4:45 pm
OPO
-
IAD
13h 05m
1 stop
SWISS Logo
8:20 pm - 7:55 am
IAD
-
OPO
30h 35m
1 stop
$620SWISS
Thu, Apr 16 - Mon, Apr 20
United Airlines Logo
6:00 am - 10:43 pm
OPO
-
DCA
21h 43m
2 stops
United Airlines Logo
6:00 pm - 9:45 am
DCA
-
OPO
10h 45m
1 stop
$642United Airlines
Tue, May 19 - Sun, May 31
United Airlines Logo
6:00 am - 9:06 pm
OPO
-
DCA
20h 06m
2 stops
United Airlines Logo
4:30 pm - 9:45 am
DCA
-
OPO
12h 15m
1 stop
$643United Airlines
Thu, Apr 16 - Mon, Apr 20
Air Canada Logo
6:00 am - 10:43 pm
OPO
-
DCA
21h 43m
2 stops
Air Canada Logo
4:10 pm - 5:35 pm
DCA
-
OPO
44h 25m
2 stops
$669Air Canada
Thu, Apr 16 - Mon, Apr 20
Air Canada Logo
6:00 am - 10:43 pm
OPO
-
DCA
21h 43m
2 stops
Air Canada Logo
4:10 pm - 5:35 pm
DCA
-
OPO
44h 25m
2 stops
$673Air Canada
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 SWISS ($620) and Lufthansa ($624).

Good to know

Low seasonMay
Cheapest flight$379
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 2% 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.

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 2171 reviews
7.8Crew
7.0Boarding
6.3Entertainment
7.1Comfort
6.2Food
Airline reviews

The crew was great. There was a big guy sitting next to me who was hanging over my side of the armrest the entire time. Maybe some information about "Be considerate of your neighbors, this is tight space, be kind". The breakfast sandwich was not appealing at all.

8.0 ExcellentHillary, Mar 2026
LIS - BOS
Read more TAP AIR PORTUGAL reviews

The crew was great. There was a big guy sitting next to me who was hanging over my side of the armrest the entire time. Maybe some information about "Be considerate of your neighbors, this is tight space, be kind". The breakfast sandwich was not appealing at all.

Kayak let me choose these flights on TAP but then after 2 months, cancelled my flights because they didn't think 90 minutes was enough time for the connection. I notice that neither flight was actually cancelled. Just my reservation. Why let me go through all of that effort to find the right flights for us, only to cancel it from underneath us 2 months later leaving us scrambling to find an alternative?

It was a good experience overall. We were however delayed by over 3 hours due to a security issue with one of the passengers inadvertently leaving a power bank in a luggage she was using as carrying on but then had to be moved int check in due to spacing issues. The airline staff had requested that she checked her bags in, but should have reminded her about removing all hazardous material like her power bank. When she eventually remembered as we were on the plane, we had to turn back and go through security all over again. Hence delaying our takeoff. The incident could have been prevented if staff reminded these passengers to remove their power banks.

this flight was awful from pre-boarding to on the plane. There needs to be more coordination between TAP and My Way. We were in first class and I am handicapped. BY the time we got on the plane there was no place for our baggage and the crew did not handle the situation well. They gave us an argument and said that we'd have to have it checked. Then, after I complained they moved some people's bags to put our small carry ons several seats back of our seats which were in Row 4.

Bad. They gave me a voucher for food to use at the airport but didn’t have time since I had to catch the other plane. No refunds and lack of communication

Negative. Food was awful, seat broken, flight was late, baggage lost and damaged

The ground staff did not load my bag onto the plane and despite me watching from the bus that my bag is not being loaded and taken back on the cart to the terminal, I pointed out to the staff and ge laughed upon checking my tag and knowing they made a mistake. Instead of calling the cart back and loading it he said we can’t fo anything and you should file a report upon landing at RAK. I told them my stay there is short and i needed my bag as it had everything I needed but no avail. Even the pilot was informed, staff of the plane was aware but all in don’t care mode. Upon arriving at Marrakech RAK, i filed a report and being told it might come in next flight tomorrow and we don’t provide delivery service, you must come and pick it up. If it doesn’t arrive on time then it will be sent to your home in the US. Unbelievable stress and inconvenience that could have been easily prevented by the ground staff.

The cabin crew were curt, not with me, but observed with other passengers. They were unduly rude and it was unprovoked and when they realized they were wrong, they made no attempt to apologize for their own confusion.

I was disappointed of the crew, not friendly and attentive. Delay one way for fuel leakage and the plane is so hot. Not that great all around but I’m glad I experienced it so now know better.

Flew Business class and did not like anything, flight attendants were rude and not helpful. Food was of poor quality and I did not eat meals.

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

Information on your arrival and departure airports