IDA - DEN

$139 Find Cheap Flights from Idaho Falls to Denver

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Idaho Falls to Denver departing on 12/29. 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 Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Idaho Falls to Denver, 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 Idaho Falls to Denver, 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: $272
United Airlines
Mon 12/29Fri 1/2
IDA - DEN • Non-stop
Cheapest one-way
$379
Typical prices: $158-$213
United Airlines
Sat 12/20
IDA - DEN • Non-stop
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 39% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
July
Cheapest • 25% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Denver!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Idaho Falls to Denver 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 Idaho Falls to Denver

Mon, Dec 29 - Fri, Jan 2
United Airlines Logo
5:00 am - 7:03 am
IDA
-
DEN
2h 03mnonstop
United Airlines Logo
8:00 am - 9:58 am
DEN
-
IDA
1h 58mnonstop
$189United Airlines
Tue, Dec 23 - Sat, Dec 27
United Airlines Logo
5:00 am - 7:03 am
IDA
-
DEN
2h 03mnonstop
United Airlines Logo
9:05 pm - 10:59 pm
DEN
-
IDA
1h 54mnonstop
$219United Airlines
Fri, Dec 26 - Thu, Jan 1
United Airlines Logo
10:45 am - 12:41 pm
IDA
-
DEN
1h 56mnonstop
United Airlines Logo
8:00 am - 9:58 am
DEN
-
IDA
1h 58mnonstop
$220United Airlines
Thu, Jan 1 - Fri, Jan 2
United Airlines Logo
6:40 am - 8:42 am
IDA
-
DEN
2h 02mnonstop
United Airlines Logo
8:00 am - 9:58 am
DEN
-
IDA
1h 58mnonstop
$232United Airlines
Fri, Feb 13 - Mon, Feb 16
United Airlines Logo
2:40 pm - 4:29 pm
IDA
-
DEN
1h 49mnonstop
United Airlines Logo
8:00 am - 9:48 am
DEN
-
IDA
1h 48mnonstop
$249United Airlines
Fri, Dec 26 - Mon, Dec 29
United Airlines Logo
5:00 am - 7:03 am
IDA
-
DEN
2h 03mnonstop
United Airlines Logo
8:00 am - 9:58 am
DEN
-
IDA
1h 58mnonstop
$264United Airlines
Sun, Jan 11 - Thu, Jan 15
Multiple Airlines Logo
1:34 pm - 11:19 pm
IDA
-
DEN
9h 45m1 stop
Multiple Airlines Logo
10:48 pm - 4:50 pm
DEN
-
IDA
18h 02m1 stop
$274Multiple Airlines
Sun, Jan 11 - Thu, Jan 15
Multiple Airlines Logo
1:34 pm - 11:19 pm
IDA
-
DEN
9h 45m1 stop
Multiple Airlines Logo
6:50 am - 2:19 pm
DEN
-
IDA
31h 29m2 stops
$283Multiple Airlines
Tue, Jan 27 - Fri, Jan 30
Alaska Airlines Logo
9:00 am - 11:35 pm
IDA
-
DEN
14h 35m1 stop
Alaska Airlines Logo
7:00 am - 10:59 pm
DEN
-
IDA
15h 59m1 stop
$332Alaska Airlines
Tue, Jan 27 - Fri, Jan 30
Alaska Airlines Logo
6:58 pm - 11:35 pm
IDA
-
DEN
28h 37m1 stop
Alaska Airlines Logo
11:49 am - 10:59 pm
DEN
-
IDA
11h 10m2 stops
$338Alaska Airlines
Booking Insights

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

Get data-powered insights and trends into flights from Idaho Falls to Denver 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 Idaho Falls to Denver?

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

If your flying dates are flexible, you should consider flying to Denver 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 Idaho Falls to Denver. For your return ticket, we recommend flying on a Thursday and avoiding Mondays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Idaho Falls to Denver, 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 Idaho Falls to Denver is July, where tickets cost $213 (return) on average. On the other hand, the most expensive months are March and November, where the average cost of round-trip tickets is $342 and $338 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Idaho Falls to Denver, 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 Idaho Falls to Denver, you should book around 3 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$189
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Idaho Falls to Denver

When to book flights from Idaho Falls to Denver

Are your dates flexible? Find out the best times to travel from Idaho Falls to Denver 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 Idaho Falls to Denver

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

    In the last 3 days, the lowest price for a flight from Idaho Falls to Denver was $139 for a one-way ticket and $189 for a round-trip.

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

    No

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

    All the following airlines offer inflight Wi-Fi service on the Idaho Falls to Denver flight route: American Airlines, Delta, Aeromexico, Air France, Virgin Atlantic, KLM, and JetBlue.

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

    The Embraer 175 (Enhanced Winglets) is the aircraft model that flies most regularly on the Idaho Falls to Denver flight route.

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

    SkyTeam, and Star Alliance are the airline alliances operating flights between Idaho Falls and Denver, with SkyTeam being the most commonly used for this route.

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

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

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

    The two airlines most popular with KAYAK users for flights from Idaho Falls to Denver are Delta and United Airlines. With an average price for the route of $273 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $309 and an overall rating of 7.4.

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

    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 Idaho Falls to Denver.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Idaho Falls 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 Idaho Falls to Denver?

    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 Denver with an airline and back to Idaho Falls with another airline. Booking your flights between Idaho Falls and DEN 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 Idaho Falls to Denver?

    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 Denver from Idaho Falls 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 Idaho Falls to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for $239 or less one-way and $367 or less round-trip.

Prefer to fly direct from Idaho Falls to Denver?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Idaho Falls Fanning Field to Denver Intl.
Find which airlines fly direct from Idaho Falls Fanning Field Airport to Denver Intl Airport, which days they fly and book direct flights.

Direct departures

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

Direct returns

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

Reviews of the top 3 airlines serving from Idaho Falls to Denver

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls to Denver. 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 Idaho Falls to Denver? 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.
7.9
DeltaOverall score based on 8009 reviews
8.1Boarding
7.9Entertainment
7.3Food
7.9Comfort
8.5Crew
Airline reviews

The food is terrible. The staff is wonderful. Comfort is good.

10.0 ExcellentRonda, Dec 2025
JAX - JFK
Read more Delta reviews

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

United have really come back. Airport and boarding process is clear and good, app and information also very good

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Late FA meant slow boarding. WiFi did not work. I’m a medium plus sized passenger. The seatbelt was for the first time ever barely fitting. And we delayed on the tarmac 40 min

My husband and I had boarded the flight from Denver to Chicago, and one of the last passengers to get on the plane opened the overhead bin above my husband's seat and threw his bag out of the bin to make space for his own. He said, "Mine is bigger!" The flight attendant supported the new passenger. They didn't care that my husband has two artificial knees and must have the foot room in front of his seat to be able to fit his legs in -- and to be able to stand, much less walk, at the end of the flight. I have never seen this happen before, and it was a disaster.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Very rough getting into denver. my kid threw up it was so rough.

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

It was canceled. The flight wasn’t rescheduled, everyone had to figure out their own new arrangements. They said we would get refunded our original fare and receive an additional $150. We received links for $100 only and they expired before we could activate them.

The plane had originated in Las Vegas at 6:30 in the morning and flew to Moline where we boarded. The flight left around 12:30 PM and there were no boxed snacks available and many of the alcoholic beverages were unavailable. I would find it hard to believe that that many of the passengers coming from Las Vegas at 6:30 in the morning, drank and ate that much of the items. I can only come to the conclusion that someone failed to stock the plane for the round-trip. This is a huge revenue failure for the airline and disappointment for the passengers. The flight crew did not seem happy to be there and did not engage with passengers. Allegiant you can do better.

They did not let my husband on the plane with our service animal at the last minute. Do NOT fly this airline with a service animal!

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

Information on your arrival and departure airports