Cheap Flights from Washington (IAD) to Portimao (PRM)

Popular airlines from Washington Dulles Intl. Airport (IAD) to Portimao (PRM)

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Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Portimao (PRM) cost?
Secure a cheap one-way flight or cheap return flight from Washington Dulles Intl. Airport (IAD) to Portimao (PRM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Portimao (PRM)?
Flying in may help you find better deals, as it's the cheapest month for flights between IAD and PRM. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Portimao (PRM)?
To find the cheapest airline that'll fly you from IAD to PRM, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Portimao (PRM)?
You'll need to hop on a flight with a layover when traveling from Washington Dulles Intl. Airport (IAD) to Portimao (PRM). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from IAD to PRM?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Portimao (PRM)?
To avoid possible delays on the Washington Dulles Intl. Airport (IAD) to Portimao (PRM) route, aim to fly before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Portimao (PRM) last-minute?
Waiting until just before your departure to book your flight from IAD to PRM generally means paying more. While it's possible to find some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule for a better chance of snagging a bargain.
Is it cheaper to book an IAD to PRM flight and hotel package?
You'll typically save money by securing an IAD to PRM flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After choosing your ideal accommodations and flights, consider other add-ons like car rentals, tours and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Portimao (PRM)?
If you booked your IAD to PRM flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Portimao
Distance
3655 mi

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Washington to Portimao Flights

The cheapest times to fly from Washington to Portimao

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Portimao are during the month of . You can find some of the cheapest flights from Washington to Portimao with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Portimao

Sunday is one of the best days to book for cheap flights from Washington to Portimao: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Portimao

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Portimao in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Portimao flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Portimao airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Portimao Flights

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