DEN - IDA

$146 Find Cheap Flights from Denver to Idaho Falls

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Idaho Falls departing on 3/30. 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, 0 bags

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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$189
Overall average: $377
United Airlines
Thu 2/26Mon 3/2
DEN - IDA • Non-stop
Cheapest non-stop
$189
Typical prices: $249-$395
United Airlines
Wed 3/25Sun 3/29
DEN - IDA • Non-stop
Top airlines
United Airlines
Cheapest • from $189 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
8 weeks
in advance
Our data shows that travelers who book at least 8 weeks in advance save around 45% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
June
Cheapest • 57% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Idaho Falls!
Flight Deals
Booking Insights
Flight 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

Thu, Feb 26 - Mon, Mar 2
United Airlines Logo
8:00 am - 9:48 am
DEN
-
IDA
1h 48mnonstop
United Airlines Logo
5:33 pm - 7:25 pm
IDA
-
DEN
1h 52mnonstop
$189United Airlines
Fri, Mar 27 - Sun, Mar 29
United Airlines Logo
8:10 am - 9:56 am
DEN
-
IDA
1h 46mnonstop
United Airlines Logo
2:30 pm - 4:17 pm
IDA
-
DEN
1h 47mnonstop
$219United Airlines
Thu, Mar 26 - Sun, Mar 29
United Airlines Logo
11:45 am - 1:30 pm
DEN
-
IDA
1h 45mnonstop
United Airlines Logo
2:30 pm - 4:17 pm
IDA
-
DEN
1h 47mnonstop
$225United Airlines
Thu, Mar 12 - Mon, Mar 16
United Airlines Logo
11:45 am - 1:30 pm
DEN
-
IDA
1h 45mnonstop
United Airlines Logo
2:35 pm - 4:25 pm
IDA
-
DEN
1h 50mnonstop
$249United Airlines
Tue, Feb 24 - Tue, Mar 3
Delta Logo
12:50 pm - 5:49 pm
DEN
-
IDA
4h 59m
1 stop
Delta Logo
5:25 am - 9:24 am
IDA
-
DEN
3h 59m
1 stop
$254Delta
Fri, Feb 20 - Fri, Feb 27
Multiple Airlines Logo
6:00 am - 3:31 pm
DEN
-
IDA
9h 31m
1 stop
Multiple Airlines Logo
10:29 pm - 8:27 am
IDA
-
DEN
9h 58m
1 stop
$255Multiple Airlines
Thu, Feb 19 - Wed, Feb 25
United Airlines Logo
8:00 am - 9:48 am
DEN
-
IDA
1h 48mnonstop
United Airlines Logo
2:40 pm - 4:29 pm
IDA
-
DEN
1h 49mnonstop
$264United Airlines
Sat, Feb 21 - Sun, Feb 22
Delta Logo
3:59 pm - 10:21 pm
DEN
-
IDA
6h 22m
1 stop
Delta Logo
5:25 am - 9:24 am
IDA
-
DEN
3h 59m
1 stop
$269Delta
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
10:34 pm - 3:30 pm
DEN
-
IDA
16h 56m
1 stop
Multiple Airlines Logo
4:20 pm - 7:54 am
IDA
-
DEN
15h 34m
2 stops
$277Multiple Airlines
Fri, Feb 27 - Fri, Mar 6
Multiple Airlines Logo
6:00 am - 3:30 pm
DEN
-
IDA
9h 30m
1 stop
Multiple Airlines Logo
4:21 pm - 2:52 pm
IDA
-
DEN
22h 31m
1 stop
$288Multiple Airlines
Booking Insights

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, Monday 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 $115 (return) on average. On the other hand, the most expensive months are January and February, where the average cost of round-trip tickets is $379 and $377 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 8 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Find deals

Good to know

Low seasonSeptember
Cheapest flight$146
Best time to beat the crowds but there is an average 31% increase in price.
Most popular time to fly and prices are also 57% 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 $146 for a one-way ticket and $189 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?

    American Airlines, and JetBlue offer 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 CRJ-550 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 $294 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 $88 and an overall rating of 7.2.

  • 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 $198 or less one-way and $189 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?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Denver Intl to Idaho Falls Fanning Field.
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

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Idaho Falls Fanning Field to Denver Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the 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 9229 reviews
6.6Food
8.1Crew
7.3Comfort
7.7Boarding
7.1Entertainment
Airline reviews

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

2.0 MediocreSid, Dec 2025
DEN - BZN
Read more United Airlines reviews

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Flight was late - I was downgraded from first class to coach

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

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

My 90 year old father flew with me. He needed wheel chair assistance and is nearly deaf. The staff was amazing with him.

It was fine. Nobody was outstandingly friendly but no one was rude and everything was smooth . The captain thanked us for flying but no one greeted me as I walked on the plane or as I exited which is the least they could do lol

Clean, friendly, roomy. But check-in from the phone link was terrible. Repeated attempts wouldn’t save at the final step. Just kept spinning! It was very frustrating. Finally, I used the app (vs website link) to check-in which worked very smoothly on the first attempt.

Check in on the web portal was cumbersome! After several attempts I finally got the boarding pass.

Excellent flight and even arrived 23 min early. No entertainment , or wi fi on board, but I downloaded a couple of movies beforehand which kept me entertained. Really like flying Allegiant airlines.

WE were delayed about an hour and never any communications from the employees working the gate. We also were moved to a total of three gates.

I love how they show love to their customers and care about them too.

I liked how when I got on board how fast we ended up taking off but what I truly disliked was how uncomfortable the seats were. There was truly never a time that I could ever get comfortable during both of my flights. The seats could get away during shorter flights but flights 3 hour plus makes it hard to enjoy.

The crew was great and the flight was very smooth. Can’t really judge food since I did not get any because it costs money. The seat was comfortable for what we bought. Thanks!

Crew was great. No entertainment and food and beverage was for purchase only, even water

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

Information on your arrival and departure airports

Denver (DEN)
Idaho Falls (IDA)