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Idaho Falls

$117+ Cheap flights from Denver to Idaho Falls (DEN - IDA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — IDA
oct. 11 — oct. 181
sam. 10/11
sam. 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Idaho Falls Fanning Field are usually found in June or July, booked 81 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Denver to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Idaho Falls (IDA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septembre 11, 2025.

Round-trip from

$189
(United Airlines)

One-way from

$117
(Kiwi.com)

Popular in

December

Cheapest in

June

Average price

$418

Good round-trip deal

$249 or less

Good one-way deal

$68 or less
From Denver Intl to Idaho Falls Fanning Field
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One-way flight from Denver Intl to Idaho Falls Fanning Field
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Highest demand for flights based on searches. 25% potential increase in price ($110 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Denver Intl to Idaho Falls Fanning Field.
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Price to beat on a one-way flight from Denver Intl to Idaho Falls Fanning Field.
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Find flight deals from Denver to Idaho Falls

Cheapest flights from Denver to Idaho Falls
Explore the most affordable flight options available from Denver to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septembre 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/138:00 amDEN - IDA
Nonstop1h 48mUnited Airlines
lun. 10/205:56 pmIDA - DEN
Nonstop1h 44mUnited Airlines
Deal found 9/11$189
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/88:01 amDEN - IDA
Nonstop1h 47mUnited Airlines
lun. 11/104:15 pmIDA - DEN
Nonstop1h 50mUnited Airlines
Deal found 9/9$194
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 9/258:00 amDEN - IDA
Nonstop1h 48mUnited Airlines
mar. 9/302:35 pmIDA - DEN
Nonstop1h 48mUnited Airlines
Deal found 9/10$199
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/193:54 pmDEN - IDA
1 stop6h 25mDelta
dim. 11/236:00 amIDA - DEN
1 stop3h 23mDelta
Deal found 9/10$209
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/38:00 amDEN - IDA
Nonstop1h 48mUnited Airlines
mar. 10/75:00 amIDA - DEN
Nonstop1h 56mUnited Airlines
Deal found 9/10$219
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/139:48 amDEN - IDA
1 stop9h 02mMultiple Airlines
lun. 10/207:40 pmIDA - DEN
1 stop27h 30mMultiple Airlines
Deal found 9/11$239
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 10/1210:29 pmDEN - IDA
1 stop14h 20mMultiple Airlines
lun. 10/207:40 pmIDA - DEN
1 stop27h 30mMultiple Airlines
Deal found 9/10$245
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/51:30 pmDEN - IDA
Nonstop1h 46mUnited Airlines
dim. 11/94:15 pmIDA - DEN
Nonstop1h 50mUnited Airlines
Deal found 9/11$249
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/57:00 amDEN - IDA
1 stop5h 33mDelta
dim. 11/96:57 pmIDA - DEN
1 stop3h 32mDelta
Deal found 9/11$259
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 10/96:55 amDEN - IDA
1 stop14h 28mMultiple Airlines
lun. 10/207:40 pmIDA - DEN
1 stop27h 30mMultiple Airlines
Deal found 9/10$260
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 9/253:35 pmDEN - IDA
Nonstop1h 40mUnited Airlines
dim. 9/282:35 pmIDA - DEN
Nonstop1h 48mUnited Airlines
Deal found 9/10$264
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/38:00 amDEN - IDA
Nonstop1h 48mUnited Airlines
dim. 10/55:56 pmIDA - DEN
Nonstop1h 44mUnited Airlines
Deal found 9/11$274

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septembre 11, 2025.
Use the filters below to find and compare flights from Denver to Idaho Falls that are best for you.

Fly from

Denver

Fly to

Idaho Falls

Route

Depart

Return

Price

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

lun. 10/13

8:00 am-9:48 am

Nonstop1h 48m

Idaho Falls Fanning Field

lun. 10/20

5:56 pm-7:40 pm

Nonstop1h 44m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

jeu. 9/25

8:00 am-9:48 am

Nonstop1h 48m

Idaho Falls Fanning Field

mar. 9/30

2:35 pm-4:23 pm

Nonstop1h 48m

$199

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

mer. 11/19

3:54 pm-10:19 pm

1 stop6h 25m

Idaho Falls Fanning Field

dim. 11/23

6:00 am-9:23 am

1 stop3h 23m

$209

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

ven. 10/3

8:00 am-9:48 am

Nonstop1h 48m

Idaho Falls Fanning Field

mar. 10/7

5:00 am-6:56 am

Nonstop1h 56m

$219

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

ven. 10/31

1:30 pm-3:16 pm

Nonstop1h 46m

Idaho Falls Fanning Field

sam. 11/1

8:30 am-10:18 am

Nonstop1h 48m

$219

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

lun. 10/13

9:48 am-6:50 pm

1 stop9h 02m

Idaho Falls Fanning Field

lun. 10/20

7:40 pm-11:10 pm

1 stop27h 30m

$239

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

mer. 11/19

8:01 am-9:48 am

Nonstop1h 47m

Idaho Falls Fanning Field

dim. 11/23

5:00 am-6:57 am

Nonstop1h 57m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

mer. 12/10

8:00 am-9:47 am

Nonstop1h 47m

Idaho Falls Fanning Field

dim. 12/14

4:19 pm-6:07 pm

Nonstop1h 48m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

mar. 10/7

8:00 am-9:48 am

Nonstop1h 48m

Idaho Falls Fanning Field

lun. 10/27

4:15 pm-6:05 pm

Nonstop1h 50m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

dim. 10/26

9:05 pm-10:52 pm

Nonstop1h 47m

Idaho Falls Fanning Field

dim. 11/2

4:15 pm-6:05 pm

Nonstop1h 50m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 21 results
1
2
3

Best time to book a flight from Denver to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Denver with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Denver to Idaho Falls. Price data was last updated on August 29, 2025.

The price you pay for your flight from Denver to Idaho Falls may vary depending on when you book. For the best chance of a lower fare, look to book 50 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Denver to Idaho Falls?

Currently, October is the cheapest month in which you can book a flight from Denver to Idaho Falls (average of $380). Flying from Denver to Idaho Falls in December is currently the most expensive (average of $578). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DEN to IDA?

Find hourly flight availability from Denver to Idaho Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septembre 11, 2025.

It’s typically best to fly out from Denver to Idaho Falls in the afternoon. Doing so could potentially save you 32% on the flight price compared to flying in the evening, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Denver to Idaho Falls. Price data was last updated on September 7, 2025.

Travelers seeking maximum savings on their Denver to Idaho Falls flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho Falls. Reviews last updated septembre 11, 2025.
Read reviews from past customers who have flown United Airlines and Allegiant Air from Denver to Idaho Falls. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Allegiant Air
7.2
Good
702 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Denver to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Denver to Idaho Falls?

    To fly from Denver to Idaho Falls, you need to book a flight from Denver Intl (DEN) to Fanning Field (IDA). Nonstop flights to Idaho Falls Fanning Field from Denver Intl take 1h 40m on average. When it comes time to book airfare, you have a few options: there are 5 outbound flights from Denver Intl to Fanning Field offered by 2 different airlines.

  • How popular is this Denver to Idaho Falls flight route?

    The Denver Intl to Idaho Falls Fanning Field flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Denver to Idaho Falls?

    Departing from Denver to Idaho Falls will take you 1h 48m. The distance from Denver to Idaho Falls is about 457 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Denver to Idaho Falls round-trip?

    Allegiant Air, at $44, was found to be the cheapest airline from Denver to Idaho Falls. An alternate airline flying to your destination would be United Airlines. These flights start at 86% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Denver to Idaho Falls?

    Consider SkyWest Airlines (75%), United Airlines (75%) or Allegiant Air (72%) when booking your flight. These represent the most reliable airlines when flying from Denver to Idaho Falls.

  • What are the cheapest flights from Denver to Idaho Falls?

    While on average a flight from Denver to Idaho Falls is generally $199, our data shows the cheapest flight currently is $41. When looking at the most popular route, (Denver Intl - Idaho Falls Fanning Field), you can expect to pay $189 for that flight.

  • Can I find deals for flights from Denver to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on Denver to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Idaho Falls.

  • Can I find deals for business class flights from Denver to Idaho Falls?

    Yes. Cheapflights offers flight deals from Denver to Idaho Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, October is the cheapest month in which you can book a flight from Denver to Idaho Falls (average of $380). Flying from Denver to Idaho Falls in December is currently the most expensive (average of $578). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

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Alternative routes for Denver to Idaho Falls

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Denver to Idaho Falls

Discover the top 2 airlines that operate flights from Denver to Idaho Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$44Average$88FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$213Average$330FlexibilityNo cancel feeOn-time69%

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