$373 Cheap Flights from Washington (IAD) to Trondheim (TRD)

View $373 flight on Tue, Jul 29, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Vaernes Airport (TRD)

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Cheap Flights from Washington to Trondheim (IAD-TRD)

Prices were available within the past 7 days and start at $373 for one-way flights and $502 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Mon, Aug 18 - Wed, Aug 27
IAD
Washington
TRD
Trondheim
$502 Roundtrip, found 1 day ago
$502
Roundtrip
found 1 day ago
Select Scandinavian Airlines flight, departing Mon, Aug 18 from Washington to Trondheim, returning Wed, Aug 27, priced at $502 found 1 day ago
Scandinavian Airlines
Mon, Aug 18 - Wed, Aug 27
IAD
Washington
TRD
Trondheim
$505 Roundtrip, found 1 day ago
$505
Roundtrip
found 1 day ago
Select Scandinavian Airlines flight, departing Mon, Aug 18 from Washington to Trondheim, returning Wed, Aug 27, priced at $505 found 1 day ago
Scandinavian Airlines
Mon, Aug 18 - Wed, Aug 27
IAD
Washington
TRD
Trondheim
$509 Roundtrip, found 1 day ago
$509
Roundtrip
found 1 day ago
Select Scandinavian Airlines flight, departing Mon, Aug 18 from Washington to Trondheim, returning Wed, Aug 27, priced at $509 found 1 day ago
Scandinavian Airlines
Tue, Sep 2 - Thu, Sep 11
IAD
Washington
TRD
Trondheim
$511 Roundtrip, found 3 days ago
$511
Roundtrip
found 3 days ago
Select Scandinavian Airlines flight, departing Tue, Sep 2 from Washington to Trondheim, returning Thu, Sep 11, priced at $511 found 3 days ago
Scandinavian Airlines
Tue, Sep 2 - Thu, Sep 11
IAD
Washington
TRD
Trondheim
$541 Roundtrip, found 3 days ago
$541
Roundtrip
found 3 days ago
Select Scandinavian Airlines flight, departing Tue, Sep 2 from Washington to Trondheim, returning Thu, Sep 11, priced at $541 found 3 days ago
Scandinavian Airlines
Tue, Aug 12 - Wed, Aug 20
IAD
Washington
TRD
Trondheim
$553 Roundtrip, found 2 days ago
$553
Roundtrip
found 2 days ago
Select Scandinavian Airlines flight, departing Tue, Aug 12 from Washington to Trondheim, returning Wed, Aug 20, priced at $553 found 2 days ago
Delta
Thu, Aug 14 - Wed, Aug 20
IAD
Washington
TRD
Trondheim
$584 Roundtrip, found 2 days ago
$584
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Aug 14 from Washington to Trondheim, returning Wed, Aug 20, priced at $584 found 2 days ago
TAP Portugal
Mon, Aug 18 - Wed, Aug 27
IAD
Washington
TRD
Trondheim
$593 Roundtrip, found 1 day ago
$593
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Mon, Aug 18 from Washington to Trondheim, returning Wed, Aug 27, priced at $593 found 1 day ago
KLM
Tue, Aug 12 - Wed, Aug 20
IAD
Washington
TRD
Trondheim
$810 Roundtrip, found 2 days ago
$810
Roundtrip
found 2 days ago
Select KLM flight, departing Tue, Aug 12 from Washington to Trondheim, returning Wed, Aug 20, priced at $810 found 2 days ago
Air France
Tue, Aug 12 - Tue, Aug 19
IAD
Washington
TRD
Trondheim
$840 Roundtrip, found 1 day ago
$840
Roundtrip
found 1 day ago
Select Air France flight, departing Tue, Aug 12 from Washington to Trondheim, returning Tue, Aug 19, priced at $840 found 1 day ago
Flights from Washington (IAD) to Trondheim (TRD)
Origin airport
Washington Dulles Intl.
Destination airport
Vaernes
Airlines serving
Air France, Finnair, KLM, Lufthansa, Scandinavian Airlines, TAP Portugal
Roundtrip price
$501
Distance
3806 mi

Washington to Trondheim Flights

The cheapest times to fly from Washington to Trondheim

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

 

The best time to book a flight from Washington to Trondheim

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

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 Trondheim in 2025. You can also book with separate airlines for your outbound and return journeys, from $373 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 Trondheim 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 Trondheim 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.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Vaernes Airport (TRD) cost?
Discover the latest flight deals from IAD to TRD by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from IAD to TRD?
The cheapest flights from IAD to TRD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from IAD to TRD?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from IAD to TRD. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Vaernes Airport (TRD)?
There aren't any daily nonstop flights from Washington Dulles Intl. Airport (IAD) to Vaernes Airport (TRD). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from IAD to TRD?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary based on a number of factors, such as the carrier and season.*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 Vaernes Airport (TRD)?
Choose a flight from Washington Dulles Intl. Airport (IAD) to Vaernes Airport (TRD) that takes off before 3 PM to reduce the likelihood of delays. Departures later than this have a 22% higher chance of being canceled, on average.**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 Vaernes Airport (TRD) last-minute?
Holding off until just before your trip to book your flight from IAD to TRD generally means paying more. Although you may find some last-minute offers, they're not always guaranteed. Keep your travel schedule open to boost your chances of scoring a bargain.
Is it cheaper to book an IAD to TRD flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAD to TRD flight and hotel package with Expedia could lead to significant savings. Better yet, having it all in one place will take the stress out of planning your trip. Just secure your flights and choose from our extensive range of stays, then customize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Vaernes Airport (TRD)?
If you reserved your IAD to TRD flight in the last 24 hours, you may be able to cancel or modify 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, visit our Customer Service portal if you'd like more information.

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*Available to One Key members.