The cheapest times to fly from BOI to TRF are

  • January 1st to April 1st
  • May 14th to June 10th
  • October 8th to December 9th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from BOI to TRF is late February and early March. Prices can be as high as $2079 for Saturday flights during early August, or as low as $946 for Tuesday flights around late February and early March.


When to Fly to Oslo

Flying from Boise, ID (BOI) to Sandefjord (TRF) will usually cost between $1028 to $1855 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late February and early March with an average ticket price of $1113. Due to high demand the most expensive time to fly is early August, with an average price of $1865. Planning your trip to low-cost times can easily save you $752 on economy flights and even more on first-class flights. Generally, any price below $1463 can be considered a good price for a round-trip BOI to TRF flight.

See below for a graph of average weekly prices for the BOI to TRF route. All prices are for round-trip tickets in USD.

BOI to TRF Flight Prices

Compared to other flights, the BOI to TRF flight is slightly more expensive than the average and costs more than the average flight leaving from Boise. The average price per mile (for a direct flight) is $0.19, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to TRF, and Wednesday the cheapest day to fly back into BOI. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $212 (14%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1342. Return trip prices are from the TRF to BOI flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from BOI to TRF can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 9 hour 28 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from BOI to TRF while comparing.

Destination alternative #1: Gardermoen Airport (OSL) in Oslo

  • 76 miles (122 km) away from TRF
  • Usually 20.37% less expensive than TRF
  • 2-layover flights available

See BOI to OSL flights


Flight Hacking BOI to TRF

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from BOI to TRF — but Champion Traveler does!

Hack #1: Los Angeles, CA (BOI > LAX > TRF)

  • Price for both tickets: $755
  • Average savings: $708 (48.41%)

See BOI to LAX flights

Hack #2: Burbank, CA (BOI > BUR > TRF)

  • Price for both tickets: $877
  • Average savings: $586 (40.05%)

See BOI to BUR flights

Hack #3: Long Beach, CA (BOI > LGB > TRF)

  • Price for both tickets: $880
  • Average savings: $584 (39.88%)

See BOI to LGB flights


Flight Questions Answered

Still have questions about flying from BOI to TRF? We’ve got answers.

Which airlines fly this route?

You can find 5 major airlines flying this route most often: Air France, Alaska, Delta, KLM, United, and potentially more during busy seasons.

How far away is it from Torp Airport to Boise Air Terminal Airport?

The distance between the two airports is roughly 4712 miles or 7583 kilometers.

How long does it take to fly from BOI to TRF?

The real-world flight time for a nonstop BOI to TRF flight is about 9 hour 28 minutes.

How many flights go between Boise, ID and Sandefjord?

It depends on the day of the week and the date, but a typical day might have around 11 available flights from BOI to TRF.


Airport Location Info


Departing Airport

Origination codeBOI
Origination airport nameBoise Air Terminal Airport
CityBoise, ID
Countrythe United States

Return Airport

Destination codeTRF
Destination airport nameTorp Airport


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.