Beginning of main content
Round Trip Icon
Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5

Search over 1,000,000 properties worldwide and 550 airlines worldwide.

Search over a million flights, hotels, packages, and more

No Expedia cancellation fee to change or cancel almost any hotel reservation.

Cheap IAD to OPO Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Washington to Porto route information

Origin Airport Washington Dulles Intl.
Destination Airport Dr. Francisco de Sa Carneiro
Airlines Serving Air Canada, Air France, Alitalia, British Airways, Brussels Airlines, Delta, Emirates, Iberia, KLM, Lufthansa, Royal Air Maroc, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Flight Price $474
Distance 3,539 mi

Cheap IAD to OPO Flights

  • What is the cheapest day to fly to Porto?

    As of Sep 2nd, the best day for booking to Porto (OPO) is Sep 23rd. A ticket will run you $568, which is 52% less than this route's average price.
  • Can I change the date of my flight?

    Yes, you can switch your departure date. If you wish to save some funds in doing so, the lowest-cost day to fly in September is Wednesday.
  • How long do most people visit Porto?

    Of course, you are not most people, but if you were, you'd stay roughly 11 days.
  • What is the cheapest airline flying from Dulles to Porto?

    TAP Air Portugal is your best bet for finding that sought-after low fare. They offer fares as low as $556, while rates for similar flights are as high as $6,593.
  • What is the cheapest day to fly?

    The cheapest day to fly from Dulles to Porto is on Wednesday. If you are trying to save some cash on your next trip look for flights on Wednesday.
  • How much is a plane ticket to Porto (OPO) from Dulles (IAD)?

    Cost can range anywhere from $556 to $6,593, prices for IAD to OPO do fluctuate a lot more than the majority of routes from the United States. However, usually the sooner you book, the better price you get.

Sterling to Porto Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Sterling to Porto will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring Porto.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at, we’ll pair you up with IAD to OPO flights that won’t make your bank account wince. Ready to temporarily leave behind Sterling for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to OPO with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.