HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho Falls

$167+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — IDA
Dec 29 — Jan 51
Mon 12/29
Mon 1/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Idaho Falls with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 Saturday and return on a Thursday

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 November 29, 2025.

This United Airlines deal was found by Cheapflights users on 11/27. 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 12/198:00 amDEN - IDA
Nonstop1h 58mUnited Airlines
Sun 1/114:19 pmIDA - DEN
Nonstop1h 54mUnited Airlines
Deal found 11/27$189
This United Airlines deal was found by Cheapflights users on 11/27. 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 12/228:00 amDEN - IDA
Nonstop1h 58mUnited Airlines
Sat 12/275:00 amIDA - DEN
Nonstop2h 03mUnited Airlines
Deal found 11/27$217
This United Airlines deal was found by Cheapflights users on 11/27. 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 12/128:00 amDEN - IDA
Nonstop1h 47mUnited Airlines
Mon 12/1510:58 amIDA - DEN
Nonstop1h 46mUnited Airlines
Deal found 11/27$219
This United Airlines deal was found by Cheapflights users on 11/28. 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 12/238:00 amDEN - IDA
Nonstop1h 58mUnited Airlines
Tue 12/306:40 amIDA - DEN
Nonstop2h 02mUnited Airlines
Deal found 11/28$249
This American Airlines deal was found by Cheapflights users on 11/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/192:13 pmDEN - IDA
1 stop8h 08mAmerican Airlines
Thu 12/257:00 amIDA - DEN
1 stop8h 07mAmerican Airlines
Deal found 11/27$285
This Kiwi.com deal was found by Cheapflights users on 11/27. 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 12/125:35 pmDEN - IDA
1 stop18h 24mMultiple Airlines
Mon 12/158:16 pmIDA - DEN
1 stop7h 42mMultiple Airlines
Deal found 11/27$291
This United Airlines deal was found by Cheapflights users on 11/28. 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 12/108:00 amDEN - IDA
Nonstop1h 47mUnited Airlines
Wed 12/244:05 pmIDA - DEN
Nonstop1h 54mUnited Airlines
Deal found 11/28$294
This United Airlines deal was found by Cheapflights users on 11/28. 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 12/108:00 amDEN - IDA
Nonstop1h 47mUnited Airlines
Sun 12/142:45 pmIDA - DEN
Nonstop1h 49mUnited Airlines
Deal found 11/28$309
This Kiwi.com deal was found by Cheapflights users on 11/27. 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.
Wed 12/39:44 pmDEN - IDA
1 stop19h 17mMultiple Airlines
Mon 12/88:16 pmIDA - DEN
1 stop7h 42mMultiple Airlines
Deal found 11/27$323
This United Airlines deal was found by Cheapflights users on 11/28. 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
Sun 1/44:05 pmIDA - DEN
Nonstop1h 54mUnited Airlines
Deal found 11/28$338

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 November 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$189
(United Airlines)

One-way from

$167
(Alaska Airlines)

Popular in

December

Cheapest in

June

Average price

$364

Good round-trip deal

$264 or less

Good one-way deal

$458 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. 31% potential increase in price ($139 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Denver Intl to Idaho Falls Fanning Field.
Search Deals
Price to beat on a one-way 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 November 29, 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

Fri 12/19

8:00 am-9:58 am

Nonstop1h 58m

Idaho Falls Fanning Field

Thu 12/25

2:30 pm-4:21 pm

Nonstop1h 51m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 12/19

8:00 am-9:58 am

Nonstop1h 58m

Idaho Falls Fanning Field

Sun 1/11

4:19 pm-6:13 pm

Nonstop1h 54m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sun 12/21

8:00 am-9:58 am

Nonstop1h 58m

Idaho Falls Fanning Field

Tue 12/30

5:00 am-7:03 am

Nonstop2h 03m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Mon 12/22

8:00 am-9:58 am

Nonstop1h 58m

Idaho Falls Fanning Field

Sat 12/27

5:00 am-7:03 am

Nonstop2h 03m

$217

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Thu 1/22

11:00 am-2:19 pm

2 stops27h 19m

Idaho Falls Fanning Field

Mon 1/26

9:20 pm-10:32 am

1 stop13h 12m

$226

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Tue 12/23

8:00 am-9:58 am

Nonstop1h 58m

Idaho Falls Fanning Field

Tue 12/30

6:40 am-8:42 am

Nonstop2h 02m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 1/9

11:45 am-1:30 pm

Nonstop1h 45m

Idaho Falls Fanning Field

Sun 1/11

2:40 pm-4:31 pm

Nonstop1h 51m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 1/9

8:00 am-9:56 am

Nonstop1h 56m

Idaho Falls Fanning Field

Sun 1/25

10:51 am-12:45 pm

Nonstop1h 54m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Tue 1/13

7:00 am-10:59 pm

1 stop15h 59m

$167

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Mon 2/23

6:45 pm-11:36 pm

2 stops28h 51m

$188

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/29

Showing 1-10 of 14 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 November.
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 November 21, 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 February 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 November 29, 2025.

It’s typically best to fly out from Denver to Idaho Falls in the afternoon. Doing so could potentially save you 38% 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 November 29, 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 November 29, 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
9,058 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,058 reviews
United Airlines
7.4
Good
9,058 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Allegiant Air
7.2
Good
700 reviews
United Airlines
7.4
Good
9,058 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 45m on average. When it comes time to book airfare, you have a few options: there are 2 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 58m. 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 85% lower than the current average price 3 months from now.

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

    Consider SkyWest Airlines (89%), United Airlines (89%) or Copa Airlines (80%) 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 $378, our data shows the cheapest flight currently is $224. 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 February 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Idaho Falls

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Spokane flights
Denver to Boise flights
Denver to Jackson flights
Denver to Hailey flights
Grand Junction to Spokane flights
Grand Junction to Boise flights
Colorado Springs to Spokane flights
Colorado Springs to Boise flights
Durango to Idaho Falls flights
Denver to Lewiston flights
Hayden to Boise flights
Colorado Springs to Hailey flights
Montrose to Spokane flights
Colorado Springs to Jackson flights
Aspen to Hailey flights
Aspen to Spokane flights
Denver to Twin Falls flights
Aspen to Boise flights
Durango to Spokane flights
Colorado Springs to Idaho Falls flights
Denver to Pocatello flights
Grand Junction to Jackson flights
Colorado Springs to Lewiston flights
Hayden to Jackson flights
Gunnison to Boise flights
Vail to Spokane flights
Colorado Springs to Pocatello flights
Denver to West Yellowstone flights
Alamosa to Spokane flights

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 November 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$44Average$88FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$194Average$312FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.