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471 € 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 Airport to Washington Dulles Airport? If you want to travel next month, return fares start from 488 €. Find the lowest prices on one-way and return tickets right here.
Washington D.C..471 € per passenger.Departing Tue, 1 Sep, returning Fri, 11 Sep.Return flight with Lufthansa and SWISS.Outbound indirect flight with Lufthansa, departs from Porto on Tue, 1 Sep, arriving in Washington Dulles.Inbound indirect flight with SWISS, departs from Washington Dulles on Fri, 11 Sep, arriving in Porto.Price includes taxes and charges.From 471 €, select.
Washington D.C..485 € per passenger.Departing Tue, 25 Aug, returning Tue, 1 Sep.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Porto on Tue, 25 Aug, arriving in Washington Dulles.Inbound indirect flight with Lufthansa, departs from Washington Dulles on Tue, 1 Sep, arriving in Porto.Price includes taxes and charges.From 485 €, select.
Washington D.C..488 € per passenger.Departing Thu, 20 Aug, returning Fri, 28 Aug.Return flight with SWISS and Brussels Airlines.Outbound indirect flight with SWISS, departs from Porto on Thu, 20 Aug, arriving in Washington Dulles.Inbound indirect flight with Brussels Airlines, departs from Washington Dulles on Fri, 28 Aug, arriving in Porto.Price includes taxes and charges.From 488 €, select.
Washington D.C..528 € per passenger.Departing Tue, 1 Dec, returning Wed, 9 Dec.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Porto on Tue, 1 Dec, arriving in Washington Dulles.Inbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Wed, 9 Dec, arriving in Porto.Price includes taxes and charges.From 528 €, select.
Washington D.C..528 € per passenger.Departing Thu, 5 Nov, returning Thu, 26 Nov.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Porto on Thu, 5 Nov, arriving in Washington Dulles.Inbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Thu, 26 Nov, arriving in Porto.Price includes taxes and charges.From 528 €, select.
Washington D.C..528 € per passenger.Departing Sat, 10 Oct, returning Mon, 19 Oct.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Porto on Sat, 10 Oct, arriving in Washington Dulles.Inbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Mon, 19 Oct, arriving in Porto.Price includes taxes and charges.From 528 €, select.
Washington D.C..557 € per passenger.Departing Fri, 27 Nov, returning Sat, 5 Dec.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Porto on Fri, 27 Nov, arriving in Washington Dulles.Inbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Sat, 5 Dec, arriving in Porto.Price includes taxes and charges.From 557 €, select.
Washington D.C..559 € per passenger.Departing Tue, 1 Jun, returning Tue, 8 Jun.Return flight with British Airways and Iberia.Outbound indirect flight with British Airways, departs from Porto on Tue, 1 Jun, arriving in Washington Dulles.Inbound indirect flight with Iberia, departs from Washington Dulles on Tue, 8 Jun, arriving in Porto.Price includes taxes and charges.From 559 €, select.
Washington D.C..559 € per passenger.Departing Thu, 26 Nov, returning Thu, 28 Jan.Return flight with British Airways and Iberia.Outbound indirect flight with British Airways, departs from Porto on Thu, 26 Nov, arriving in Washington Dulles.Inbound indirect flight with Iberia, departs from Washington Dulles on Thu, 28 Jan, arriving in Porto.Price includes taxes and charges.From 559 €, select.
Washington D.C..560 € per passenger.Departing Thu, 11 Feb, returning Mon, 15 Feb.Return flight with British Airways and Iberia.Outbound indirect flight with British Airways, departs from Porto on Thu, 11 Feb, arriving in Washington Dulles.Inbound indirect flight with Iberia, departs from Washington Dulles on Mon, 15 Feb, arriving in Porto.Price includes taxes and charges.From 560 €, select.
Washington D.C..569 € per passenger.Departing Thu, 25 Mar, returning Sat, 3 Apr.Return flight with SWISS.Outbound indirect flight with SWISS, departs from Porto on Thu, 25 Mar, arriving in Washington Dulles.Inbound indirect flight with SWISS, departs from Washington Dulles on Sat, 3 Apr, arriving in Porto.Price includes taxes and charges.From 569 €, select.
Washington D.C..570 € per passenger.Departing Wed, 28 Oct, returning Sun, 1 Nov.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Porto on Wed, 28 Oct, arriving in Washington Dulles.Inbound indirect flight with Air France, departs from Washington Dulles on Sun, 1 Nov, arriving in Porto.Price includes taxes and charges.From 570 €, select.
Washington D.C..581 € per passenger.Departing Sun, 21 Mar, returning Sat, 27 Mar.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Porto on Sun, 21 Mar, arriving in Washington Dulles.Inbound indirect flight with Lufthansa, departs from Washington Dulles on Sat, 27 Mar, arriving in Porto.Price includes taxes and charges.From 581 €, select.
Washington D.C..629 € per passenger.Departing Wed, 22 Jul, returning Sun, 26 Jul.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Porto on Wed, 22 Jul, arriving in Washington Dulles.Inbound indirect flight with Iberia, departs from Washington Dulles on Sun, 26 Jul, arriving in Porto.Price includes taxes and charges.From 629 €, select.
Washington D.C..630 € per passenger.Departing Mon, 27 Jul, returning Sun, 2 Aug.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Porto on Mon, 27 Jul, arriving in Washington Dulles.Inbound indirect flight with Iberia, departs from Washington Dulles on Sun, 2 Aug, arriving in Porto.Price includes taxes and charges.From 630 €, select.
Washington D.C..671 € per passenger.Departing Mon, 10 Aug, returning Wed, 9 Dec.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Porto on Mon, 10 Aug, arriving in Washington Dulles.Inbound indirect flight with Air France, departs from Washington Dulles on Wed, 9 Dec, arriving in Porto.Price includes taxes and charges.From 671 €, 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.
Jul
from 629 €
Aug
from 488 €
Sep
from 471 €
Oct
from 528 €
Nov
from 528 €
Dec
from 528 €
Jan
Find prices
Feb
from 560 €
Mar
from 581 €
Apr
from 3.552 €
May
Find prices
Jun
from 559 €

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.

Washington Ronald Reagan

5km from central Washington D.C.
Closest
from 486 €
Search flights

Washington Dulles

37km from central Washington D.C.
Cheapest
from 471 €
Search flights

Baltimore Washington International

44km from central Washington D.C.
from 580 €
Search flights

Porto to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found471 €
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 471 €. 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 471 €.
As of July 2026, there are no flights flying from Porto to Washington Dulles.
The cheapest month to fly from Porto to Washington Dulles is usually September.
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 Tuesday, 1 September 2026.
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, Lufthansa offers the cheapest flight tickets to Washington Dulles.

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

  • Washington DC is five hours behind Porto and observes the UTC-5 timezone.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This way, you'll have plenty of time to board your OPO to IAD flight.

  • Travelling during a peak time like August? School holidays and other popular periods can mean longer queues at check-in and security. Be extra cautious and get there up to four hours before international flights and two hours before a domestic departure.

  • Think about adding a stopover when booking your ticket from Porto Airport to Washington Dulles Airport. Just deselect 'Direct flights only' to break up your journey, or even explore someplace new along the way. Here are some options between OPO and IAD:

    • New York John F. Kennedy Airport

    • Madrid Airport

    • Toronto Pearson International Airport

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

  • The lowest price we've seen for a one-way Porto Airport to Washington Dulles Airport flight is 298 €. A round-trip plane ticket is currently 471 €. Depending on the availability and when you book, these fares can change.

  • It's a good idea to book early if you want to get cheap tickets from OPO to IAD. That's because airlines change prices based on demand, which tends to increase closer to departure.

  • The 'Whole month' search tool shows you the cheapest flights from Porto Airport to Washington Dulles Airport across each month. It's a good way to find a bargain if your travel dates are flexible.

  • Snapping up cheap flights from OPO to IAD is a breeze with Price Alerts. All you need to do is set up one of these automatic alerts and we'll get in touch as soon as there's a better deal.

  • Secure the ideal flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Porto Airport to Washington Dulles Airport, use the 'Sort by' tool. You can also filter by airline, arrival and departure times, and journey duration.

Handy information about Porto Airport (OPO)

  • When it comes to Porto Airport's on-time performance, data shows 75% of flights arrive within the expected timeframe.

  • Central Porto to Porto Airport is approximately 11 kilometres. Depending on traffic, it'll take about 20 minutes to get there if you're driving, ride-sharing or catching a taxi.

  • Taking public transport? Expect a trip time of around 30 minutes.

  • Get your travels off to a leisurely start by staying near OPO. Whether you're taking an early flight from Porto Airport to Washington Dulles Airport or want to avoid feeling rushed, these stays are ideal:

Arriving at Washington Dulles Airport (IAD)

When to fly to Washington Dulles Airport (IAD)

  • July is the busiest month for flights from Porto Airport to Washington Dulles Airport. To avoid the crowds, go to Washington DC in February.

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

  • Search for cheap tickets from OPO to IAD in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -6ºC (21ºF) and 10ºC (50ºF) on average.

Explore more of the United States

  • New York is just one of the many places in the United States waiting to be explored after you've seen Washington DC. Around 322 kilometres away to the north-east, its best attractions include Central Park, Statue of Liberty and Metropolitan Museum of Art.

  • Philadelphia is another must-experience destination in the United States and is around 193 kilometres north-east of Washington DC. No trip is complete without seeing Independence Hall, Liberty Bell and Philadelphia Museum of Art.

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 12 days.