Cheap flights from Idaho Falls to Denver from $109

The cheapest month to fly to Denver from Idaho Falls is in October. Flight prices, which tend to average around $229, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in October, then you should wait until August to fly from Idaho Falls, when ticket prices are also cheap, with an average price of $239.

The cheapest day to depart on your flight to Denver is on a Thursday when prices can be found for as low as $488. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $614.

The cheapest time of day to fly to Denver is in the afternoon when flights can be purchased for as low as $409. Flights in the morning are often more expensive with an average ticket price of $578.

Fly from Idaho Falls Fanning Field to Denver Intl for the best Idaho Falls Fanning Field - Denver Intl flight prices

You are more likely to see cheaper flights to Denver from Idaho Falls when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $278 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Idaho Falls for as low as $177 on momondo.

There are 4 cabin classes available to choose from on Idaho Falls Fanning Field to Denver Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Idaho Falls to Denver.

As of March 2026, prices for Idaho Falls to Denver flights are approximately 92% more expensive when compared to flights at the same time last year.

United Airlines and Alaska Airlines are the most popular carriers operating from Idaho Falls Fanning Field to Denver Intl

United Airlines, Allegiant Air and Delta are the top three most popular airlines that fly to Denver from Idaho Falls according to our data. United Airlines is the first choice among our users, with 93% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 3 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

As of March 2026, 4 flights take off from Idaho Falls and land in Denver each day. The most common flight departure time for this route is 5:00PM, with 57% of daily flights taking off in the afternoon.

As of March 2026, there are 29 flights per week flying from Idaho Falls to Denver. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.