DEN - IDA

$84 Find Cheap Flights from Denver to Idaho Falls

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Idaho Falls departing on 7/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Idaho Falls, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Idaho Falls, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Denver to Idaho Falls (DEN-IDA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Idaho Falls that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Idaho Falls

Sun, Jul 6 - Sun, Jul 13
Allegiant Air Logo
3:20 pm - 5:04 pmDEN-IDA
1h 44mnonstop
Allegiant Air Logo
5:49 pm - 7:37 pmIDA-DEN
1h 48mnonstop
$84Allegiant Air
Find Deal
Thu, Jul 17 - Thu, Jul 24
Allegiant Air Logo
3:20 pm - 5:04 pmDEN-IDA
1h 44mnonstop
Allegiant Air Logo
5:49 pm - 7:37 pmIDA-DEN
1h 48mnonstop
$88Allegiant Air
Find Deal
Tue, Jul 8 - Tue, Jul 15
United Airlines Logo
9:05 pm - 10:51 pmDEN-IDA
1h 46mnonstop
United Airlines Logo
6:03 pm - 7:45 pmIDA-DEN
1h 42mnonstop
$189United Airlines
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Wed, Jul 9 - Wed, Jul 16
Delta Logo
7:10 am - 10:34 amDEN-IDA
3h 24m1 stop
Delta Logo
6:52 pm - 10:11 pmIDA-DEN
3h 19m1 stop
$209Delta
Find Deal
Fri, Jul 11 - Sun, Jul 20
United Airlines Logo
3:40 pm - 5:22 pmDEN-IDA
1h 42mnonstop
United Airlines Logo
5:00 am - 6:56 amIDA-DEN
1h 56mnonstop
$219United Airlines
Find Deal
Fri, Jul 11 - Sun, Jul 20
Delta Logo
5:30 am - 10:34 amDEN-IDA
5h 04m1 stop
Delta Logo
6:00 am - 9:24 amIDA-DEN
3h 24m1 stop
$239Delta
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Thu, Jul 17 - Sun, Jul 20
 Logo
6:00 am - 6:33 pmDEN-IDA
36h 33m2 stops
 Logo
5:49 pm - 7:37 pmIDA-DEN
1h 48mnonstop
Sun, Jun 29 - Wed, Jul 2
 Logo
3:20 pm - 5:04 pmDEN-IDA
1h 44mnonstop
 Logo
4:58 pm - 4:41 pmIDA-DEN
47h 43m3 stops
Fri, Sep 5 - Sun, Sep 7
Alaska Airlines Logo
11:40 am - 3:23 pmDEN-IDA
27h 43m2 stops
Alaska Airlines Logo
6:13 am - 12:10 pmIDA-DEN
5h 57m1 stop
$408Alaska Airlines
Find Deal
Fri, Sep 5 - Sun, Sep 7
Alaska Airlines Logo
11:40 am - 10:39 pmDEN-IDA
10h 59m2 stops
Alaska Airlines Logo
6:13 am - 6:37 pmIDA-DEN
12h 24m2 stops
$448Alaska Airlines
Find Deal
Useful Info

KAYAK's insights & trends for Denver to Idaho Falls flights

Get data-powered insights and trends into flights from Denver to Idaho Falls to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Denver to Idaho Falls?

The average price of all round-trip flights from Denver to Idaho Falls clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Idaho Falls on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Denver to Idaho Falls. For your return ticket, we recommend flying on a Wednesday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Denver to Idaho Falls?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Idaho Falls, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Idaho Falls is June, where tickets cost $95 (return) on average. On the other hand, the most expensive months are December and September, where the average cost of round-trip tickets is $543 and $465 respectively.

How far in advance should I book a flight from Denver to Idaho Falls?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Idaho Falls, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Denver to Idaho Falls, you should book around 9 weeks before departure. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$84
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Denver to Idaho Falls

When to book flights from Denver to Idaho Falls

Are your dates flexible? Find out the best times to travel from Denver to Idaho Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Idaho Falls

  • What documents do I need for my flight from Denver to Idaho Falls?

    American citizens can travel to France for tourism or business purposes without a visa for a maximum duration of 90 days. As long as the trip falls within this timeframe and you meet the entry requirements such as having a valid identification document, you can fly to Idaho Falls seamlessly.

  • What are the cancellation and refund policies for flights on this route?

    The cancellation and refund policies vary depending on the airline chosen. Delta Airlines allows you to cancel or change your eTicket within one day of purchase for a full refund. However, cancellations made 30 days or less before the scheduled arrival become nonrefundable. As for American Airlines, if you book your ticket at least two days before departure, you have until 24 hours from the time of purchase to cancel and request a refund.

  • What are the pet-friendly airlines operating this route?

    Several airlines operating the Denver to Idaho Falls route allow pets. Some pet-friendly options include American Airlines, Delta Air Lines, and Allegiant Air. Copa Airlines allows only small dogs and cats in the cabin. Your pet can travel in the cabin with you as a carry-on, under the seat in front of you.

  • Are there specific services for passengers with disabilities or special needs traveling from Denver to Idaho Falls?

    Yes, Airlines such as United, Delta, American, and Copa Airlines offer services like wheelchair assistance, priority boarding, and special seating arrangements. Denver International Airport and Idaho Falls Fanning Field Airport have accessibility services to cater to the needs of passengers with disabilities.

  • What is the cheapest flight from Denver to Idaho Falls?

    In the last 3 days, the lowest price for a flight from Denver to Idaho Falls was $160 for a one-way ticket and $84 for a round-trip.

  • Do I need a passport to fly between Denver and Idaho Falls?

    No

  • Which airports will I be using when flying from Denver to Idaho Falls?

    When flying out of Denver you will be using Denver Intl. You will be landing at Idaho Falls, also known as Idaho Falls Fanning Field.

  • Which airlines offer Wi-Fi service onboard planes from Denver to Idaho Falls?

    Only American Airlines offers inflight Wi-Fi service on the Denver to Idaho Falls flight route.

  • Which aircraft models fly most regularly from Denver to Idaho Falls?

    The Canadair (Bombardier) Regional Jet is the aircraft model that flies most regularly on the Denver to Idaho Falls flight route.

  • Which airline alliances offer flights from Denver to Idaho Falls?

    Star Alliance is the only airline alliance operating flights between Denver and Idaho Falls.

  • On which days can I fly direct from Denver to Idaho Falls?

    There are nonstop flights from Denver to Idaho Falls on a daily basis.

  • Which is the best airline for flights from Denver to Idaho Falls, United Airlines or Allegiant Air?

    The two airlines most popular with KAYAK users for flights from Denver to Idaho Falls are United Airlines and Allegiant Air. With an average price for the route of $363 and an overall rating of 7.4, United Airlines is the most popular choice. Allegiant Air is also a great choice for the route, with an average price of $89 and an overall rating of 7.3.

  • How does KAYAK find such low prices on flights from Denver to Idaho Falls?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Idaho Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Idaho Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Idaho Falls from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Idaho Falls?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Idaho Falls with an airline and back to Denver with another airline. Booking your flights between Denver and IDA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Idaho Falls?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Idaho Falls from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Denver to Idaho Falls

  • Looking for a cheap flight? 25% of our users found flights on this route for $42 or less one-way and $91 or less round-trip.
  • Denver International Airport (DEN) is conveniently located about 25 miles northeast of downtown Denver. The airport is well-connected with various transportation modes such as the A Line commuter train that provides a quick connection from downtown to the airport. Hence, you can easily catch your flights without worrying about traffic or parking.
  • For flights from Denver to Idaho Falls (IDA), common layovers include Salt Lake City (SLC) for Delta Airlines, Las Vegas Harry Reid Intl (LAS) for Frontier and Allegiant Air, and Dallas/Fort Worth (DFW) for American Airlines. These layovers provide opportunities for you to rest, grab a bite to eat, or explore these cities before continuing your journey to Idaho Falls.
  • Be aware of the luggage restrictions imposed by the airlines to avoid unnecessary delays. American Airlines can allow you to check bags with a maximum size limit of 62 inches and a weight limit of 50 lbs or 70 lbs for First/Business class passengers. However, excess charged bags must not exceed 50 lbs. United Airlines permits Economy ticket holders and Premier Gold members to check two complimentary bags weighing up to 70 lbs each.
  • We recommend upgrading to a first-class seat, particularly if your flight involves a layover. Airlines such as Delta, United, and American Airlines offer this option, allowing you an opportunity to enjoy enhanced comfort, priority boarding, extra legroom, exclusive amenities, and premium dining during your journey.
  • For unaccompanied minors, Delta and United Airlines allow children between the ages of 5 and 14 to travel unaccompanied. On American Airlines, children aged 5 and above can travel without an adult on direct flights, while connecting flights require children to be between 8 and 14 years old.

Prefer to fly direct from Denver to Idaho Falls?

Find which airlines fly direct from Denver Intl Airport to Idaho Falls Fanning Field Airport, which days they fly and book direct flights.

Direct departures

Denver Intl to Idaho Falls Fanning Field

Monday

Copa Airlines, United Airlines

Copa Airlines, United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

Copa Airlines, United Airlines

Copa Airlines, United Airlines

Thursday

Allegiant Air, Copa Airlines, United Airlines

Allegiant Air, Copa Airlines, +1 more

Friday

Copa Airlines, United Airlines

Copa Airlines, United Airlines

Saturday

Copa Airlines, United Airlines

Copa Airlines, United Airlines

Sunday

Allegiant Air, Copa Airlines, United Airlines

Allegiant Air, Copa Airlines, +1 more

See more direct flights

Direct returns

Idaho Falls Fanning Field to Denver Intl

Monday

Copa Airlines, United Airlines

Copa Airlines, United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

Copa Airlines, United Airlines

Copa Airlines, United Airlines

Thursday

Allegiant Air, Copa Airlines, United Airlines

Allegiant Air, Copa Airlines, +1 more

Friday

Copa Airlines, United Airlines

Copa Airlines, United Airlines

Saturday

Copa Airlines, United Airlines

Copa Airlines, United Airlines

Sunday

Allegiant Air, Copa Airlines, United Airlines

Allegiant Air, Copa Airlines, +1 more

See more direct flights
See more direct flights

Top airlines flying from Denver to Idaho Falls

 
See real verified KAYAK customer reviews for airlines flying from Denver to Idaho Falls. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Idaho Falls? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8790 reviews
6.6Food
7.0Entertainment
7.7Boarding
7.3Comfort
8.1Crew
Airline reviews

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

10.0 ExcellentAnonymous, Jun 2025DEN - BOS
Read more United Airlines reviews

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

No food service almost missed because of first flight delays

Had a hard time finding my assigned seat. No attendants to assist.

The negative was the wait at the airport coming back. I checked my bags in, an hour before boarding and I get the notification that my flight was delayed. Rather had gotten the notification while I was at the hotel. Then it was delayed 3 x’s. Ugh!

Tight! Seats are not designed for those of us who wear extra-large clothes.

The non-stop flight from Grand Rapids was excellent. I neither expected or needed a budget flight and Allegiant made the trip easy and for an affordable price, Arriving at the Mesa Airport (AZA) is a delight compared to the international airport. For our return flight, we were able to arrive 75 minutes before the flight, return the rental car, check our bag and make it to the gate in plenty of time. That would never happen at most airports.

Easiest flights I’ve ever taken. Plane was comfortable without overly crowded seating.

Terrible. Still have not received the refund from them. They sent it to some account that I don't even know. Spoke with costumer service and they are unable to help.

I didn’t like it at all. I miss my second flight because of the delay on Allegiant Air now I m stuck in MCO.

Good, but a bit late on take off after loading. Don't like charging for carry ons!

First time flying with them and will definitely fly again in the future. Crew was so nice and friendly, fought was seamless. They are simple planes, no entertainment, but it’s fine for a short flight or if you have personal devices Rates are competitive, and they did so well with keeping the flight on time after a tropical storm, where other airlines had delays and cancellations.

They boarded passengers that sat in the back of the plane first, making boarding very efficient.

I didn't even take this flight. My plans changed and I couldn't get ahold of customer service and the website kept breaking down during the attempt to change the flight. I wound up taking another airline entirely and eating the cost.

The worst flying experience ever 3 delays. No accommodations. Had to deboard the plane after being delayed.

Everything you need to know for your flight from Denver to Idaho Falls

Information on your arrival and departure airports

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