$343 Cheap Flights from Oslo (OSL) to Tri-Cities (TRI)

View $343 flight on Sun, Mar 8, 2026Opens in a new window

Popular airlines from Gardermoen Airport (OSL) to Tri-Cities, TN (TRI-Tri-Cities Regional)

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Cheap Flights from Oslo to Tri-Cities (OSL-TRI)

Prices were available within the past 7 days and start at $343 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Gardermoen Airport (OSL) to Tri-Cities Regional Airport (TRI) cost?
Secure a cheap one-way flight from $343 or cheap return flight from Gardermoen Airport (OSL) to Tri-Cities Regional Airport (TRI) 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 Gardermoen Airport (OSL) to Tri-Cities Regional Airport (TRI)?
Planning your getaway for is a great way to save, as it's the cheapest month for flights between OSL and TRI. You'll typically find the lowest fares during the off-season.
What is the cheapest airline that flies from Gardermoen Airport (OSL) to Tri-Cities Regional Airport (TRI)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from OSL to TRI. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Gardermoen Airport (OSL) to Tri-Cities Regional Airport (TRI)?
You'll have to catch a flight with a layover if you're traveling from Gardermoen Airport (OSL) to Tri-Cities Regional Airport (TRI). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from OSL to TRI?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change 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 Gardermoen Airport (OSL) to Tri-Cities Regional Airport (TRI)?
To arrive at Tri-Cities Regional Airport (TRI) on schedule, pick a flight that leaves Gardermoen Airport (OSL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Gardermoen Airport (OSL) to Tri-Cities Regional Airport (TRI) last-minute?
Booking your plane ticket from OSL to TRI right before your trip is generally more expensive. But if you're flexible with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book an OSL to TRI flight and hotel package?
Securing an OSL to TRI flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Pick from our impressive range of hotels and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Gardermoen Airport (OSL) to Tri-Cities Regional Airport (TRI)?
If you reserved your OSL to TRI flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare 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 further details.

Travel information

Travel information

Origin airport
Gardermoen
Destination airport
Tri-Cities Regional
Distance
4184 mi

Book with confidence

Book with confidence

Oslo to Tri-Cities Flights

The cheapest times to fly from Oslo to Tri-Cities

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

 

The best time to book a flight from Oslo to Tri-Cities

Sunday is one of the best days to book for cheap flights from Oslo to Tri-Cities: 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 Oslo to Tri-Cities

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 Oslo to Tri-Cities in 2025. You can also book with separate airlines for your outbound and return journeys, from $343 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 Oslo to Tri-Cities 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 Oslo to Tri-Cities 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.

 

Oslo to Tri-Cities Flights

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*Available to One Key members.