OPO - WAS

$381 Find Cheap Flights from Porto to Washington, D.C.

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, D.C. departing on 6/12. 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, D.C.

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to Washington, D.C., 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, D.C., as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$616
Typical prices: $824-$805
Lufthansa
Mon 6/1Mon 6/8
OPO - IAD • 1 stop
Cheapest one-way
$381
Typical prices: $420-$590
Multiple Airlines
Fri 6/12
OPO - IAD • 3 stops
Top airlines
Cheapest • from $616 (round-trip)
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Porto and Washington, D.C.. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $572 (round-trip)
Shortest trip • 11h 45m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Washington, D.C.!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Porto to Washington, D.C. (OPO-WAS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to Washington, D.C. 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 Washington, D.C.

Mon, Jun 1 - Mon, Jun 8
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
Lufthansa Logo
3:25 pm - 3:40 pm
IAD
-
OPO
19h 15m
1 stop
$616Lufthansa
Mon, Jun 8 - Mon, Jun 15
TAP AIR PORTUGAL Logo
7:00 am - 3:10 pm
OPO
-
IAD
13h 10m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 3:00 pm
IAD
-
OPO
11h 25m
1 stop
$634TAP AIR PORTUGAL
Thu, May 14 - Sun, Jun 7
Multiple Airlines Logo
6:00 am - 3:05 pm
OPO
-
IAD
14h 05m
1 stop
Multiple Airlines Logo
5:35 pm - 4:00 pm
IAD
-
OPO
17h 25m
1 stop
$670Multiple Airlines
Thu, May 14 - Fri, May 29
Lufthansa Logo
6:00 am - 3:05 pm
OPO
-
IAD
14h 05m
1 stop
Lufthansa Logo
3:25 pm - 11:15 am
IAD
-
OPO
14h 50m
1 stop
$671Lufthansa
Tue, Oct 13 - Sun, Oct 18
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
Lufthansa Logo
3:25 pm - 11:15 am
IAD
-
OPO
14h 50m
1 stop
$673Lufthansa
Thu, May 14 - Fri, May 29
SWISS Logo
12:15 pm - 4:45 pm
OPO
-
IAD
33h 30m
1 stop
SWISS Logo
8:20 pm - 6:30 pm
IAD
-
OPO
17h 10m
1 stop
$674SWISS
Thu, May 14 - Fri, May 29
SWISS Logo
7:20 pm - 4:45 pm
OPO
-
IAD
26h 25m
1 stop
SWISS Logo
8:20 pm - 6:30 pm
IAD
-
OPO
17h 10m
1 stop
$675SWISS
Tue, Jun 16 - Mon, Jun 22
Lufthansa Logo
12:05 pm - 8:00 pm
OPO
-
IAD
12h 55m
1 stop
Lufthansa Logo
3:25 pm - 11:15 am
IAD
-
OPO
14h 50m
1 stop
$677Lufthansa
Mon, Jun 1 - Mon, Jun 8
Air France Logo
12:15 pm - 11:24 pm
OPO
-
DCA
16h 09m
1 stop
Air France Logo
5:00 pm - 10:30 am
DCA
-
OPO
12h 30m
1 stop
$680Air France
Tue, Jun 16 - Sun, Jun 21
Air Canada Logo
6:00 am - 9:55 pm
OPO
-
DCA
20h 55m
2 stops
Air Canada Logo
6:00 am - 6:50 am
DCA
-
OPO
19h 50m
1 stop
$701Air Canada
Booking Insights

KAYAK's insights & trends for Porto to Washington, D.C. flights

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

How much is a round-trip flight from Porto to Washington, D.C.?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Porto to Washington, D.C. departing in June.

What is the cheapest month to fly from Porto to Washington, D.C.?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Porto to Washington, D.C., 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, D.C. is March, where tickets cost $422 (return) on average. On the other hand, the most expensive months are July and February, where the average cost of round-trip tickets is $627 and $595 respectively.

Good to know

Low seasonMarch
Cheapest flight$381
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from Porto to Washington Dulles Airport

When to book flights from Porto to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Porto to Washington, D.C. based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Porto to Washington, D.C.

  • What is the cheapest flight from Porto to Washington, D.C.?

    In the last 3 days, the lowest price for a flight from Porto to Washington, D.C. was $381 for a one-way ticket and $616 for a round-trip.

  • Do I need a passport to fly between Porto and Washington, D.C.?

    Yes

  • Which airports will I be using when flying from Porto to Washington, D.C.?

    On your way to Washington, D.C., you’ll fly out from Porto. You’ll be landing in one of Washington, D.C.’s 2 airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl.

  • Which aircraft models fly most regularly from Porto to Washington, D.C.?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Porto to Washington, D.C.?

    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, D.C..

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Porto 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, D.C.?

    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 to Washington, D.C. with an airline and back to Porto with another airline.

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

    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 to Washington, D.C. from Porto 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 Washington, D.C.

 
See real verified KAYAK customer reviews for airlines flying from Porto to Washington, D.C.. 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, D.C.? 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.
7.2
TAP AIR PORTUGALOverall score based on 2225 reviews
7.0Boarding
7.8Crew
6.2Food
7.1Comfort
6.3Entertainment
Airline reviews

Didn't make announcements during boarding, flight attendant seemed annoyed when I asked for water. Too many hours between flights. Confusing check in at the Lisbon airport.

4.0 OkayLeslie, Apr 2026
LIS - EWR
Read more TAP AIR PORTUGAL reviews

Didn't make announcements during boarding, flight attendant seemed annoyed when I asked for water. Too many hours between flights. Confusing check in at the Lisbon airport.

Chaotic boarding with no announcements. Carry on luggage needs to be checked. Bare minimum zero frill flights. Not a whole lot of anything positive to be said .

It poured rain, our luggage was sitting out in it uncovered on the transport cart while our plane was delayed! Nice business class plane for short flight to Lisbon, but more delay & rain in Lisbon, with terrible Business class seat with no entertainment & cold food on longer flight to London…ALL LUGGAGE AND CLOTHES INSIDE THEM WERE SOAKED THROUGH!!! Could only try with hair dryer to get some drying before quick turn round to train trip.

Delayed at the beginning and the end and almost missed our connection

Menzies group staff not very sympathetic good at breaking up families during the boarding process

They left our luggage uncovered on tarmac in pouring rain during an hour delay of departure! At our final destination, we found ALL OF OUR CLOTHES/SHOES soaked all the way through!! Our 1st connection plane was a great business class accommodation but only 50 minutes long. Our 2nd connection from Lisbon (another delay with luggage uncovered on tarmac) had only the extra legroom and mediocre food in business class - no entertainment and no extra comfort seating. Will not use TAP Air Portugal again!

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.

Everything you need to know for your flight from Porto to Washington, D.C.

Information on your arrival and departure airports