The cheapest times to fly from TRF to BOI are

  • January 8th to March 25th (except the week of March 12th)
  • April 9th to June 3rd
  • November 5th to December 9th (except the weeks of November 12th and November 26th)

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 TRF to BOI is late January. Prices can be as high as $2646 for Saturday flights during early to mid August, or as low as $731 for Wednesday flights around late January.


When to Fly to Boise

Flying from Sandefjord (TRF) to Boise, ID (BOI) will usually cost between $745 to $1337 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $768. Due to high demand the most expensive time to fly is early to mid August, with an average price of $1504. Planning your trip to low-cost times can easily save you $736 on economy flights and even more on first-class flights. Generally, any price below $928 can be considered a good price for a round-trip TRF to BOI flight.

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

TRF to BOI Flight Prices

Compared to other flights, the TRF to BOI flight is priced close to the average and costs slightly more than the average flight leaving from Oslo. The average price per mile (for a direct flight) is $0.12, which is far below average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to fly to BOI, and Tuesday the cheapest day to fly back into TRF. 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 Wednesday and returning a week later will cost an average of $867. Return trip prices are from the BOI to TRF 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 TRF to BOI 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.


Flight Hacking TRF to BOI

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 TRF to BOI — but Champion Traveler does!

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

  • Price for both tickets: $598
  • Average savings: $331 (35.61%)

See TRF to SJC flights

Hack #2: San Jose, CA (TRF > SJC > BOI)

  • Price for both tickets: $682
  • Average savings: $247 (26.56%)

See TRF to LAX flights

Hack #3: San Francisco, CA (TRF > SFO > BOI)

  • Price for both tickets: $702
  • Average savings: $227 (24.41%)

See TRF to SFO flights


Flight Questions Answered

Still have questions about flying from TRF to BOI? 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 Boise Air Terminal Airport to Torp Airport?

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

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

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

How many flights go between Sandefjord and Boise, ID?

It depends on the day of the week and the date, but a typical day might have around 8 available flights from TRF to BOI.


Airport Location Info


Departing Airport

Origination codeTRF
Origination airport nameTorp Airport

Return Airport

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


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.