$628 Cheap Flights from Tromsø (TOS) to Washington (IAD)

View $628 flight on Mon, Jan 19, 2026Opens in a new window

Popular airlines from Tromsø (TOS-Langnes) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Tromsø to Washington (TOS-IAD)

Prices were available within the past 7 days and start at $628 for one-way flights and $773 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Fri, Mar 13 - Fri, Mar 20
TOS
Tromsø
IAD
Washington
$773 Roundtrip, found 12 hours ago
$773
Roundtrip
found 12 hours ago
Select Swiss International Air Lines flight, departing Fri, Mar 13 from Tromsø to Washington, returning Fri, Mar 20, priced at $773 found 12 hours ago
Swiss International Air Lines
Fri, Mar 13 - Fri, Mar 20
TOS
Tromsø
IAD
Washington
$793 Roundtrip, found 12 hours ago
$793
Roundtrip
found 12 hours ago
Select Swiss International Air Lines flight, departing Fri, Mar 13 from Tromsø to Washington, returning Fri, Mar 20, priced at $793 found 12 hours ago
Scandinavian Airlines
Mon, Oct 27 - Fri, Oct 31
TOS
Tromsø
IAD
Washington
$805 Roundtrip, found 6 days ago
$805
Roundtrip
found 6 days ago
Select Scandinavian Airlines flight, departing Mon, Oct 27 from Tromsø to Washington, returning Fri, Oct 31, priced at $805 found 6 days ago
Scandinavian Airlines
Fri, Mar 13 - Fri, Mar 20
TOS
Tromsø
IAD
Washington
$837 Roundtrip, found 12 hours ago
$837
Roundtrip
found 12 hours ago
Select Scandinavian Airlines flight, departing Fri, Mar 13 from Tromsø to Washington, returning Fri, Mar 20, priced at $837 found 12 hours ago
Scandinavian Airlines
Fri, Mar 13 - Fri, Mar 20
TOS
Tromsø
IAD
Washington
$869 Roundtrip, found 12 hours ago
$869
Roundtrip
found 12 hours ago
Select Scandinavian Airlines flight, departing Fri, Mar 13 from Tromsø to Washington, returning Fri, Mar 20, priced at $869 found 12 hours ago
TAP Portugal
Fri, Mar 13 - Fri, Mar 20
TOS
Tromsø
IAD
Washington
$904 Roundtrip, found 12 hours ago
$904
Roundtrip
found 12 hours ago
Select TAP Portugal flight, departing Fri, Mar 13 from Tromsø to Washington, returning Fri, Mar 20, priced at $904 found 12 hours ago
TAP Portugal
Fri, Mar 13 - Fri, Mar 20
TOS
Tromsø
IAD
Washington
$927 Roundtrip, found 12 hours ago
$927
Roundtrip
found 12 hours ago
Select TAP Portugal flight, departing Fri, Mar 13 from Tromsø to Washington, returning Fri, Mar 20, priced at $927 found 12 hours ago
Scandinavian Airlines
Fri, Mar 13 - Fri, Mar 20
TOS
Tromsø
IAD
Washington
$935 Roundtrip, found 12 hours ago
$935
Roundtrip
found 12 hours ago
Select Scandinavian Airlines flight, departing Fri, Mar 13 from Tromsø to Washington, returning Fri, Mar 20, priced at $935 found 12 hours ago
TAP Portugal
Fri, Mar 13 - Fri, Mar 20
TOS
Tromsø
IAD
Washington
$944 Roundtrip, found 12 hours ago
$944
Roundtrip
found 12 hours ago
Select TAP Portugal flight, departing Fri, Mar 13 from Tromsø to Washington, returning Fri, Mar 20, priced at $944 found 12 hours ago
Scandinavian Airlines
Fri, Mar 13 - Fri, Mar 20
TOS
Tromsø
IAD
Washington
$947 Roundtrip, found 12 hours ago
$947
Roundtrip
found 12 hours ago
Select Scandinavian Airlines flight, departing Fri, Mar 13 from Tromsø to Washington, returning Fri, Mar 20, priced at $947 found 12 hours ago
Flights from Tromsø (TOS) to Washington (IAD)
Origin airport
Langnes
Destination airport
Washington Dulles Intl.
Airlines serving
Air France, KLM, Lufthansa, Scandinavian Airlines, TAP Portugal
Roundtrip price
$773
Distance
3866 mi

Tromsø to Washington Flights

The cheapest times to fly from Tromsø to Washington

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

 

The best time to book a flight from Tromsø to Washington

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

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 Tromsø to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $628 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 Tromsø to Washington 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 Tromsø to Washington 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 Langnes Airport (TOS) to Washington Dulles Intl. Airport (IAD) cost?
Discover the latest flight deals from TOS to IAD 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 TOS to IAD?
The cheapest flights from TOS to IAD 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 TOS to IAD?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from TOS to IAD. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Langnes Airport (TOS) to Washington Dulles Intl. Airport (IAD)?
There aren’t any daily nonstop flights from Langnes Airport (TOS) to Washington Dulles Intl. Airport (IAD). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you’ll be soaring above the clouds in no time at all.
What day of the week has the most flights from TOS to IAD?
Usually you’ll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the time of year, carrier 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 Langnes Airport (TOS) to Washington Dulles Intl. Airport (IAD)?
To avoid possible delays on the Langnes Airport (TOS) to Washington Dulles Intl. Airport (IAD) route, travel before 3 PM. Departures 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 Langnes Airport (TOS) to Washington Dulles Intl. Airport (IAD) last-minute?
Holding off until right before your break to book a ticket from TOS to IAD generally means paying more. Although you may find some last-minute discounts, there’s no guarantee. Keep your travel schedule open for the best chance of snagging a bargain.
Is it cheaper to book a TOS to IAD flight and hotel package?
Compared with arranging flights and hotels separately, booking a TOS to IAD flight and hotel package with Expedia could lead to significant savings. What’s more, having it all in one place takes the hassle out of travel planning. Just secure your flights and select from our extensive range of hotels, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Langnes Airport (TOS) to Washington Dulles Intl. Airport (IAD)?
If you booked your TOS to IAD flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes after 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.

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*Available to One Key members.