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Cheap Flights from Porto to Washington Dulles

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Flight deals from Porto to Washington Dulles

Looking for a cheap last-minute deal or the best return flight from Porto to Washington Dulles? Find the lowest prices on one-way and return tickets right here.
Washington D.C..414 € per passenger.Departing Sat, 6 Sep, returning Sat, 13 Sep.Return flight with Iberia and British Airways.Outbound indirect flight with Iberia, departs from Porto on Sat, 6 Sep, arriving in Washington Dulles.Inbound indirect flight with British Airways, departs from Washington Dulles on Sat, 13 Sep, arriving in Porto.Price includes taxes and charges.From 414 €, select.
Washington D.C..423 € per passenger.Departing Wed, 26 Nov, returning Sat, 6 Dec.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Porto on Wed, 26 Nov, arriving in Washington Dulles.Inbound indirect flight with Air France, departs from Washington Dulles on Sat, 6 Dec, arriving in Porto.Price includes taxes and charges.From 423 €, select.
Washington D.C..429 € per passenger.Departing Fri, 1 May, returning Fri, 15 May.Return flight with KLM.Outbound indirect flight with KLM, departs from Porto on Fri, 1 May, arriving in Washington Dulles.Inbound indirect flight with KLM, departs from Washington Dulles on Fri, 15 May, arriving in Porto.Price includes taxes and charges.From 429 €, select.
Washington D.C..429 € per passenger.Departing Sun, 22 Jun, returning Mon, 7 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from Porto on Sun, 22 Jun, arriving in Washington Dulles.Inbound indirect flight with Delta, departs from Washington Dulles on Mon, 7 Jul, arriving in Porto.Price includes taxes and charges.From 429 €, select.
Washington D.C..433 € per passenger.Departing Fri, 5 Dec, returning Mon, 8 Dec.Return flight with Air France.Outbound indirect flight with Air France, departs from Porto on Fri, 5 Dec, arriving in Washington Dulles.Inbound indirect flight with Air France, departs from Washington Dulles on Mon, 8 Dec, arriving in Porto.Price includes taxes and charges.From 433 €, select.
Washington D.C..483 € per passenger.Departing Tue, 26 Aug, returning Tue, 2 Sep.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Porto on Tue, 26 Aug, arriving in Washington Dulles.Inbound indirect flight with Lufthansa, departs from Washington Dulles on Tue, 2 Sep, arriving in Porto.Price includes taxes and charges.From 483 €, select.
Washington D.C..499 € per passenger.Departing Fri, 1 Aug, returning Sat, 9 Aug.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Porto on Fri, 1 Aug, arriving in Washington Dulles.Inbound indirect flight with British Airways, departs from Washington Dulles on Sat, 9 Aug, arriving in Porto.Price includes taxes and charges.From 499 €, select.
Washington D.C..516 € per passenger.Departing Tue, 1 Jul, returning Tue, 15 Jul.Return flight with KLM.Outbound indirect flight with KLM, departs from Porto on Tue, 1 Jul, arriving in Washington Dulles.Inbound indirect flight with KLM, departs from Washington Dulles on Tue, 15 Jul, arriving in Porto.Price includes taxes and charges.From 516 €, select.

Find the cheapest month to fly from Porto to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Porto to Washington Dulles flights are currently cheapest in September.
Jun
from 573 €
Jul
from 516 €
Aug
from 499 €
Sep
from 414 €
Oct
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Nov
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Dec
from 433 €
Jan
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Feb
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Mar
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Apr
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May
from 429 €

Porto to Washington Dulles: Alternative routes

Compare routes from Porto to Washington D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

Porto to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found414 €
Cheapest month to flySeptember

Finding cheap flights from Porto to Washington Dulles: Frequently asked questions

The best price we found for a return flight from Porto to Washington Dulles is 414 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Porto to Washington Dulles. But we found flights with one or more stops from 414 €.
As of June 2025, there are no flights flying from Porto to Washington Dulles.
The cheapest month to fly from Porto to Washington Dulles is usually June 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Porto Airport to Washington Dulles Airport on Saturday, 6 September 2025.
No airlines currently offer direct flights between Porto Airport and Washington Dulles Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Iberia offers the cheapest flight tickets to Washington Dulles.

Flying from Porto Airport (OPO) to Washington Dulles International Airport (IAD): what you need to know

  • Washington DC's timezone is UTC-4, making Washington DC four hours behind Porto.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Get to the airport on time to catch your OPO to IAD flight.

  • You'll likely experience longer lines during popular months such as August. Arriving up to four hours ahead of an international flight and two hours for domestic departures will help ensure a smooth travel experience.

  • If you want to include a stop along the way, just uncheck 'Direct flights only' when searching for your ticket from Porto Airport to Washington Dulles International Airport. Here are the most popular stopovers between OPO and IAD:

    • John F. Kennedy International Airport

    • Adolfo Suarez Madrid-Barajas Airport

    • Pearson International Airport

How to find the cheapest flights from Porto Airport (OPO) to Washington Dulles International Airport (IAD)

  • The lowest price we've seen for a one-way Porto Airport to Washington Dulles International Airport flight is 324 €. A round-trip plane ticket is currently 414 €. Depending on the availability when you book, these fares can change.

  • Don't wait until the last minute. You're more likely to find cheap tickets from OPO to IAD if you book early. Airlines often have some terrific early bird discounts.

  • If you can be flexible with your travel plans, try using the 'Whole month' tool. It'll show you the cheapest price across every month when looking for your flight from Porto Airport to Washington Dulles International Airport.

  • Snapping up cheap flights from OPO to IAD couldn't be easier with Price Alerts. Simply set up one of these automatic alerts and we'll let you know as soon as there's a better deal.

  • Pick your preferred departure and arrival times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to get the best deals on flights from Porto Airport to Washington Dulles International Airport.

Handy information about Porto Airport (OPO)

  • When it comes to Porto Airport's on-time performance, 74.49% of flights arrive within the scheduled timeframe.

  • To get to Porto Airport from central Porto, it'll take around 20 minutes if you're travelling by car. Of course, this depends on traffic conditions. It's approximately 16 kilometres from the airport to the city centre.

  • The journey on public transport typically takes 50 minutes.

  • Need a convenient hotel close to OPO? If you've booked an early flight from Porto Airport to Washington Dulles International Airport, these stays will have you sleeping moments from your departure lounge:

Arriving at Washington Dulles International Airport (IAD)

Getting from Washington Dulles International Airport (IAD) to central Washington DC

  • IAD is located at 1 Saarinen Circle.

  • From Washington Dulles International Airport, Washington DC is approximately 56 kilometres away. It takes around 50 minutes to reach the centre driving.

  • Getting to the centre by public transport takes about 3 hours 25 minutes.

When to fly to Washington Dulles International Airport (IAD)

  • The quietest month for a flight from Porto Airport to Washington Dulles International Airport is January, while April is the most popular. Pick the ideal time to go to Washington DC based on whether you prefer a more relaxed vibe or a faster pace.

  • The warmest month in Washington DC is July, with temperatures ranging between 19ºC (66ºF) and 33ºC (91ºF). Lock in your flights from Porto Airport to Washington Dulles International Airport in this month if you like this kind of weather.

  • If you like cooler conditions, search for a cheap ticket from OPO to IAD in January. Temperatures average between -6ºC (21ºF) and 10ºC (50ºF) then.

Explore more of United States

  • New York is just one of the many cities in United States waiting to be explored once you've seen Washington DC. Around 322 kilometres away to the north-east, well-known attractions include Statue of Liberty, Central Park and Empire State Building.

  • If you're interested in discovering another major destination in United States, head for Philadelphia, about 193 kilometres north-east of Washington DC. Liberty Bell, Independence Hall and Philadelphia Museum of Art are among the biggest draws.

Plan the rest of your trip from Porto to Washington D.C.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.