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Idaho Falls

$88+ Cheap flights from Denver to Idaho Falls (DEN - IDA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — IDA
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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 August 18, 2025.

Round-trip from

$88
(Cheapflightsfares)

Popular in

December

Cheapest in

June

Average price

$333

Good round-trip deal

$110 or less

Good one-way deal

$109 or less
From Denver Intl to Idaho Falls Fanning Field
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Highest demand for flights based on searches. 24% potential increase in price ($104 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 August 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 August 18, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 8/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/283:24 pmDEN - IDA
Nonstop1h 42mAllegiant Air
Sun 8/315:51 pmIDA - DEN
Nonstop1h 48mAllegiant Air
Deal found 8/17$88
This Cheapflightsfares deal was found by Cheapflights users on 8/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/173:24 pmDEN - IDA
Nonstop1h 42mAllegiant Air
Sun 8/245:51 pmIDA - DEN
Nonstop1h 48mAllegiant Air
Deal found 8/16$155
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Fri 9/127:10 pmDEN - IDA
Nonstop1h 44mUnited Airlines
Sun 9/145:56 pmIDA - DEN
Nonstop1h 44mUnited Airlines
Deal found 8/16$189
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Sat 8/308:00 amDEN - IDA
Nonstop1h 47mUnited Airlines
Wed 9/34:15 pmIDA - DEN
Nonstop1h 48mUnited Airlines
Deal found 8/18$224
This Delta deal was found by Cheapflights users on 8/18. 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.
Wed 11/193:40 pmDEN - IDA
1 stop6h 40mDelta
Sun 11/236:05 amIDA - DEN
1 stop5h 52mDelta
Deal found 8/18$239
This Delta deal was found by Cheapflights users on 8/17. 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.
Sat 9/66:25 pmDEN - IDA
1 stop4h 02mDelta
Tue 9/93:00 pmIDA - DEN
1 stop4h 46mDelta
Deal found 8/17$244
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Wed 11/59:05 pmDEN - IDA
Nonstop1h 47mUnited Airlines
Sun 11/94:15 pmIDA - DEN
Nonstop1h 50mUnited Airlines
Deal found 8/18$249
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Wed 9/37:10 pmDEN - IDA
Nonstop1h 44mUnited Airlines
Sun 9/75:00 amIDA - DEN
Nonstop1h 55mUnited Airlines
Deal found 8/16$254
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Tue 9/28:00 amDEN - IDA
Nonstop1h 47mUnited Airlines
Sat 9/64:00 pmIDA - DEN
Nonstop1h 46mUnited Airlines
Deal found 8/17$259
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Fri 9/196:30 amDEN - IDA
2 stops9h 35mMultiple Airlines
Mon 9/229:39 pmIDA - DEN
1 stop6h 21mMultiple Airlines
Deal found 8/17$263
This Delta deal was found by Cheapflights users on 8/17. 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.
Mon 8/255:45 amDEN - IDA
1 stop4h 54mDelta
Mon 9/16:00 amIDA - DEN
1 stop3h 14mDelta
Deal found 8/17$269

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 August 18, 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

Thu 8/28

3:24 pm-5:06 pm

Nonstop1h 42m

Idaho Falls Fanning Field

Sun 8/31

5:51 pm-7:39 pm

Nonstop1h 48m

$88

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 9/12

8:00 am-9:47 am

Nonstop1h 47m

Idaho Falls Fanning Field

Sun 9/21

5:56 pm-7:40 pm

Nonstop1h 44m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sat 9/6

7:10 pm-8:54 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Tue 9/9

7:00 am-8:52 am

Nonstop1h 52m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 9/12

8:00 am-9:47 am

Nonstop1h 47m

Idaho Falls Fanning Field

Sun 9/14

5:56 pm-7:40 pm

Nonstop1h 44m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sun 9/14

8:00 am-9:47 am

Nonstop1h 47m

Idaho Falls Fanning Field

Sun 9/21

5:56 pm-7:40 pm

Nonstop1h 44m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sat 8/30

8:00 am-9:47 am

Nonstop1h 47m

Idaho Falls Fanning Field

Wed 9/3

4:15 pm-6:03 pm

Nonstop1h 48m

$224

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sat 9/6

6:25 pm-10:27 pm

1 stop4h 02m

Idaho Falls Fanning Field

Tue 9/9

3:00 pm-7:46 pm

1 stop4h 46m

$244

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Thu 11/6

8:01 am-9:48 am

Nonstop1h 47m

Idaho Falls Fanning Field

Sun 11/9

4:15 pm-6:05 pm

Nonstop1h 50m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Wed 11/5

9:05 pm-10:52 pm

Nonstop1h 47m

Idaho Falls Fanning Field

Sun 11/9

4:15 pm-6:05 pm

Nonstop1h 50m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Thu 9/11

12:48 pm-4:05 pm

2 stops27h 17m

$128

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 18 results
1
2

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 8, 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 August 18, 2025.

It’s typically best to fly out from Denver to Idaho Falls in the afternoon. Doing so could potentially save you 40% 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 August 17, 2025.

Travelers seeking maximum savings on their Denver to Idaho Falls flight should consider departing on Sunday 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 August 18, 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
8,925 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

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
8,925 reviews
United Airlines
7.4
Good
8,925 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

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
701 reviews
United Airlines
7.4
Good
8,925 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

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 41m on average. When it comes time to book airfare, you have a few options: there are 3 outbound flights from Denver Intl to Fanning Field offered by 2 different airlines.

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

    Departing from Denver to Idaho Falls will take you 1h 42m. The distance from Denver to Idaho Falls is about 457 mi. All flights are typically nonstop.

  • 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 (69%), United Airlines (69%) or Allegiant Air (65%) 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 $183, our data shows the cheapest flight currently is $47. When looking at the most popular route, (Denver Intl - Idaho Falls Fanning Field), you can expect to pay $88 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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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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$44Average$88FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$213Average$341FlexibilityNo cancel feeOn-time69%

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