Cheap Flights from Washington (IAD) to Liege (LGG)

Popular airlines from Washington Dulles Intl. Airport (IAD) to Liege (LGG)

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Liege Airport (LGG) cost?
Get a cheap one-way flight or cheap return flight from Washington Dulles Intl. Airport (IAD) to Liege Airport (LGG) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Liege Airport (LGG)?
The cheapest month to fly from IAD to LGG is , when there's less demand. Off-peak season is often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Liege Airport (LGG)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from IAD to LGG. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Liege Airport (LGG)?
You'll need to take a flight with a layover when traveling from Washington Dulles Intl. Airport (IAD) to Liege Airport (LGG). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from IAD to LGG?
Generally you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the airline, time of year and other factors.*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 Liege Airport (LGG)?
To avoid potential delays on the Washington Dulles Intl. Airport (IAD) to Liege Airport (LGG) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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 Liege Airport (LGG) last-minute?
Holding off until just before your departure to book a ticket from IAD to LGG generally means paying more. While you may find some last-minute offers, they're not always guaranteed. Be flexible with your itinerary for a better chance of landing a bargain.
Is it cheaper to book an IAD to LGG flight and hotel package?
Securing an IAD to LGG flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our extensive range of accommodations and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Liege Airport (LGG)?
If you booked your IAD to LGG flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Liege
Distance
3926 mi

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Washington to Liege Flights

The cheapest times to fly from Washington to Liege

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 Liege are during the month of . You can find some of the cheapest flights from Washington to Liege with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Liege

Sunday is one of the best days to book for cheap flights from Washington to Liege: 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 Liege

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 Liege 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 Liege 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 Liege 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 Liege Flights

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*Available to One Key members.