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Idaho Falls

$148+ 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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — IDA
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
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 77 days in advance, depart on a Thursday or Sunday and return on a Friday

Cheap 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 December 28, 2025.

This United Airlines deal was found by Cheapflights users on 12/26. 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.
Sun 12/289:05 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Sun 1/114:19 pmIDA - DEN
Nonstop1h 54mUnited Airlines
Deal found 12/26$334
This Delta deal was found by Cheapflights users on 12/26. 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 12/296:27 pmDEN - IDA
1 stop4h 25mDelta
Fri 1/26:57 pmIDA - DEN
1 stop3h 59mDelta
Deal found 12/26$354
This United Airlines deal was found by Cheapflights users on 12/26. 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 12/308:00 amDEN - IDA
Nonstop1h 58mUnited Airlines
Sat 1/35:00 amIDA - DEN
Nonstop2h 03mUnited Airlines
Deal found 12/26$364
This United Airlines deal was found by Cheapflights users on 12/26. 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.
Mon 12/298:00 amDEN - IDA
Nonstop1h 58mUnited Airlines
Sat 1/35:00 amIDA - DEN
Nonstop2h 03mUnited Airlines
Deal found 12/26$434
This United Airlines deal was found by Cheapflights users on 12/26. 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 12/279:05 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Mon 12/296:40 amIDA - DEN
Nonstop2h 02mUnited Airlines
Deal found 12/26$459
This Delta deal was found by Cheapflights users on 12/26. 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 12/277:10 amDEN - IDA
1 stop5h 17mDelta
Mon 12/296:57 pmIDA - DEN
1 stop3h 59mDelta
Deal found 12/26$654
This Kiwi.com deal was found by Cheapflights users on 12/26. 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.
Mon 12/297:00 amDEN - IDA
1 stop9h 12mMultiple Airlines
Fri 1/210:52 pmIDA - DEN
2 stops16h 52mMultiple Airlines
Deal found 12/26$705
This United Airlines deal was found by Cheapflights users on 12/26. 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 12/269:05 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Sat 12/276:40 amIDA - DEN
Nonstop2h 02mUnited Airlines
Deal found 12/26$804
This Kiwi.com deal was found by Cheapflights users on 12/26. 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.
Tue 12/305:14 pmDEN - IDA
2 stops19h 52mMultiple Airlines
Fri 1/21:26 pmIDA - DEN
1 stop26h 39mMultiple Airlines
Deal found 12/26$840
This Kiwi.com deal was found by Cheapflights users on 12/26. 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.
Mon 12/297:00 amDEN - IDA
1 stop9h 12mMultiple Airlines
Sat 1/39:30 pmIDA - DEN
2 stops24h 10mMultiple Airlines
Deal found 12/26$890
This Kiwi.com deal was found by Cheapflights users on 12/25. 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 12/269:36 amDEN - IDA
1 stop12h 31mMultiple Airlines
Thu 1/15:30 pmIDA - DEN
2 stops22h 37mMultiple Airlines
Deal found 12/25$953

Find 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 December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$189
(United Airlines)

One-way from

$148
(Kiwi.com)

Popular in

December

Cheapest in

June

Average price

$403

Good round-trip deal

$219 or less
Provider with most accurate pricing for Denver Intl-Idaho Falls Fanning Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Idaho Falls Fanning Field flights.
Search Deals
From Denver Intl to Idaho Falls Fanning Field
Search Deals
One-way flight from Denver Intl to Idaho Falls Fanning Field
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Denver Intl to Idaho Falls Fanning Field.
Search Deals

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 December 28, 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 1/15

8:00 am-9:56 am

Nonstop1h 56m

Idaho Falls Fanning Field

Sun 1/18

2:40 pm-4:31 pm

Nonstop1h 51m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sat 1/10

8:00 am-9:56 am

Nonstop1h 56m

Idaho Falls Fanning Field

Wed 1/14

4:19 pm-6:13 pm

Nonstop1h 54m

$219

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 1/9

3:59 pm-10:19 pm

1 stop6h 20m

Idaho Falls Fanning Field

Sun 1/25

5:25 am-11:51 am

1 stop6h 26m

$224

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 1/9

6:23 pm-10:19 pm

1 stop3h 56m

Idaho Falls Fanning Field

Thu 1/15

5:25 am-9:38 am

1 stop4h 13m

$224

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Wed 2/25

8:00 am-9:48 am

Nonstop1h 48m

Idaho Falls Fanning Field

Sat 2/28

5:33 pm-7:25 pm

Nonstop1h 52m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sat 1/10

6:23 pm-10:19 pm

1 stop3h 56m

Idaho Falls Fanning Field

Thu 1/15

5:25 am-9:38 am

1 stop4h 13m

$254

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Thu 1/15

8:00 am-9:56 am

Nonstop1h 56m

Idaho Falls Fanning Field

Thu 1/22

2:40 pm-4:31 pm

Nonstop1h 51m

$264

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sat 1/10

1:39 pm-3:31 pm

Nonstop1h 52m

Idaho Falls Fanning Field

Thu 1/15

2:40 pm-4:31 pm

Nonstop1h 51m

$264

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 1/9

11:45 am-1:30 pm

Nonstop1h 45m

Idaho Falls Fanning Field

Sun 1/25

2:40 pm-4:31 pm

Nonstop1h 51m

$264

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 1/9

8:00 am-2:19 pm

1 stop6h 19m

$155

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 18 results
1
2

Compare providers for flights from Denver to Idaho Falls

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Idaho Falls in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Idaho Falls flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Denver-Idaho Falls flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Denver-Idaho Falls flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Idaho Falls flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Idaho Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 December 26, 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, May is the cheapest month in which you can book a flight from Denver to Idaho Falls (average of $37). Flying from Denver to Idaho Falls in March is currently the most expensive (average of $259). 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 December 28, 2025.

It’s typically best to fly out from Denver to Idaho Falls in the afternoon. Doing so could potentially save you 42% on the flight price compared to flying at noon, 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 December 27, 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 at noon 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 December 28, 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
9,114 reviews

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,114 reviews
United Airlines
7.4
Good
9,114 reviews

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Allegiant Air
7.2
Good
703 reviews
United Airlines
7.4
Good
9,114 reviews

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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 48m 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 2 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 56m. 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 $40, 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 85% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Denver to Idaho Falls one-way?

    $42 is the cheapest one-way deal found within the past few days, from Allegiant Air. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $153 and $199, respectively.

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

    Consider SkyWest Airlines (85%), United Airlines (85%) or Copa Airlines (84%) 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 $240, our data shows the cheapest flight currently is $189. 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, May is the cheapest month in which you can book a flight from Denver to Idaho Falls (average of $37). Flying from Denver to Idaho Falls in March is currently the most expensive (average of $259). 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$44Average$88FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$194Average$300FlexibilityNo cancel feeOn-time69%

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