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$135+ Cheap flights from Idaho Falls to Denver (IDA - DEN)

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — DEN
Apr 14 — Apr 211
Tue 4/14
Tue 4/21
1 adult, Economy
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Find cheap flights from Idaho Falls to Denver 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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Idaho Falls Fanning Field to Denver Intl are usually found in October or August, booked 53 days in advance, depart on a Thursday or Wednesday and return on a Thursday

Cheap flight deals from Idaho Falls to Denver

Cheapest flights from Idaho Falls to Denver
Explore the most affordable flight options available from Idaho Falls to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 15, 2026.

This United Airlines deal was found by Cheapflights users on 3/12. 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 4/45:45 pm
IDA
-
DEN
Nonstop1h 50m
United Airlines
Sun 4/511:44 am
DEN
-
IDA
Nonstop1h 40m
United Airlines
Deal found 3/12$229
This United Airlines deal was found by Cheapflights users on 3/12. 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 5/15:26 pm
IDA
-
DEN
Nonstop1h 55m
United Airlines
Sun 5/38:10 am
DEN
-
IDA
Nonstop1h 45m
United Airlines
Deal found 3/12$244
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/2010:21 pm
IDA
-
DEN
1 stop5h 38m
Multiple Airlines
Thu 4/236:26 am
DEN
-
IDA
2 stops33h 01m
Multiple Airlines
Deal found 3/12$248
This Delta deal was found by Cheapflights users on 3/10. 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.
Thu 4/165:47 am
IDA
-
DEN
1 stop3h 26m
Delta
Tue 5/56:27 pm
DEN
-
IDA
1 stop4h 13m
Delta
Deal found 3/10$249
This United Airlines deal was found by Cheapflights users on 3/14. 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 9/234:10 pm
IDA
-
DEN
Nonstop1h 54m
United Airlines
Sat 9/2611:50 am
DEN
-
IDA
Nonstop1h 39m
United Airlines
Deal found 3/14$256
This United Airlines deal was found by Cheapflights users on 3/14. 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 9/42:30 pm
IDA
-
DEN
Nonstop1h 49m
United Airlines
Sun 9/611:45 am
DEN
-
IDA
Nonstop1h 39m
United Airlines
Deal found 3/14$257
This Delta deal was found by Cheapflights users on 3/10. 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.
Wed 4/156:58 pm
IDA
-
DEN
1 stop3h 31m
Delta
Tue 5/56:27 pm
DEN
-
IDA
1 stop4h 13m
Delta
Deal found 3/10$264
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/310:06 pm
IDA
-
DEN
1 stop5h 53m
Multiple Airlines
Mon 4/66:00 am
DEN
-
IDA
1 stop9h 12m
Multiple Airlines
Deal found 3/13$268
This Delta deal was found by Cheapflights users on 3/14. 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 5/206:54 pm
IDA
-
DEN
1 stop3h 46m
Delta
Mon 5/255:30 am
DEN
-
IDA
1 stop5h 17m
Delta
Deal found 3/14$269
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Fri 4/1710:21 pm
IDA
-
DEN
1 stop5h 38m
Multiple Airlines
Thu 5/77:15 am
DEN
-
IDA
2 stops32h 12m
Multiple Airlines
Deal found 3/10$270

Find flight deals from Idaho Falls to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Denver (DEN). 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 March 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$229
(United Airlines)

One-way from

$135
(Kiwi.com)

Popular in

November

Cheapest in

October

Average price

$294

Good round-trip deal

$370 or less

Good one-way deal

$216 or less
Provider with most accurate pricing for Idaho Falls Fanning Field-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Denver Intl flights.
Search Deals
From Idaho Falls Fanning Field to Denver Intl
Search Deals
One-way flight from Idaho Falls Fanning Field to Denver Intl
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Idaho Falls Fanning Field to Denver Intl.
Search Deals
Price to beat on a one-way flight from Idaho Falls Fanning Field to Denver Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Denver 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 March 15, 2026.
Use the filters below to find and compare flights from Idaho Falls to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Sun 4/5

2:30 pm-4:17 pm

Nonstop1h 47m

Denver Intl

Sat 4/11

2:30 pm-4:14 pm

Nonstop1h 44m

$229

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 5/1

5:26 pm-7:21 pm

Nonstop1h 55m

Denver Intl

Sun 5/3

8:10 am-9:55 am

Nonstop1h 45m

$244

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Wed 5/20

6:00 am-9:22 am

1 stop3h 22m

Denver Intl

Mon 5/25

5:40 am-10:47 am

1 stop5h 07m

$299

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Sat 7/25

6:10 am-9:37 am

1 stop3h 27m

Denver Intl

Mon 7/27

5:40 am-10:39 am

1 stop4h 59m

$339

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Wed 4/8

5:20 pm-7:10 pm

Nonstop1h 50m

Denver Intl

Sat 4/11

8:10 am-9:53 am

Nonstop1h 43m

$389

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Mon 4/20

4:59 pm-11:44 pm

2 stops30h 45m

Denver Intl

Sat 4/25

8:00 am-3:29 pm

1 stop7h 29m

$390

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Wed 4/8

6:55 pm-10:31 pm

1 stop3h 36m

Denver Intl

Mon 4/20

6:27 pm-10:40 pm

1 stop4h 13m

$394

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 4/3

6:55 pm-10:31 pm

1 stop3h 36m

Denver Intl

Mon 4/6

6:15 pm-10:16 pm

1 stop4h 01m

$394
Quickest round-trip

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 4/3

2:30 pm-4:17 pm

Nonstop1h 47m

Denver Intl

Mon 4/6

8:10 am-9:53 am

Nonstop1h 43m

$408
Cheapest one-way

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Tue 8/4

2:30 pm-4:18 pm

Nonstop1h 48m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Idaho Falls to Denver

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 Idaho Falls to Denver in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 Idaho Falls-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Idaho Falls-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Idaho Falls-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Idaho Falls-Denver flights, Cheapflights users trust FlightHub the most. FlightHub 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 Idaho Falls-Denver 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 Idaho Falls to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Idaho Falls 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 Idaho Falls to Denver

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

Use this chart to determine the optimal time to book a round-trip flight from Idaho Falls to Denver. Price data was last updated on March 13, 2026.

The price you pay for your flight from Idaho Falls to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 51 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 Idaho Falls to Denver?

Currently, July is the cheapest month in which you can book a flight from Idaho Falls to Denver (average of $74). Flying from Idaho Falls to Denver in January is currently the most expensive (average of $189). 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 IDA to DEN?

Find hourly flight availability from Idaho Falls to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 15, 2026.

When flying from Idaho Falls to Denver, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 33% versus a flight in the morning.

How much does it cost to fly round-trip from Idaho Falls to Denver?

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated March 15, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAllegiant Air from Idaho Falls to Denver by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,296 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,296 reviews
Delta
7.9
Good
8,296 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,428 reviews
Delta
7.9
Good
8,296 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Allegiant Air
7.3
Good
712 reviews
Delta
7.9
Good
8,296 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Denver. 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 Idaho Falls to Denver?

    If you book a flight from Idaho Falls to Denver, you will be flying from Fanning Field to Denver Intl. Flights to Denver Intl (DEN) from Idaho Falls Fanning Field (IDA) take 1h 47m for a nonstop flight. There are 5 flights from Fanning Field to Denver per day from 3 airlines.

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

    This flight path from Idaho Falls Fanning Field to Denver Intl was viewed by 32 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 Idaho Falls to Denver?

    There are many flights that can get you from Idaho Falls to Denver in 1h 47m. Fly via United Airlines or Delta to get the fastest option. There are 457 mi between Idaho Falls and Denver. This flight may include one or multiple stops.

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

    Our cheapest airline available from Idaho Falls to Denver is Allegiant Air. Our recent data shows that you can find tickets from as low as $43 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $189 and $208 round-trip. Allegiant Air is currently priced 84% below the average price you’ll pay for this route.

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

    Before booking your flight to Denver from Idaho Falls, check out the most reliable airlines to get you to your destination on time: SkyWest Airlines (93%), United Airlines (92%), Copa Airlines( 83%).

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

    Looking for the cheapest flight from Idaho Falls to Denver? While on average our users pay $841, our data indicates the cheapest price to be $170. The most popular route (Idaho Falls Fanning Field - Denver Intl), is priced around $229.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho Falls to Denver 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 Idaho Falls to Denver?

    Currently, July is the cheapest month in which you can book a flight from Idaho Falls to Denver (average of $74). Flying from Idaho Falls to Denver in January is currently the most expensive (average of $189). 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 Denver?

Book flights to Denver if you plan to visit one of these locations
Thornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Glendale
Manitou Springs
Frisco
Englewood
Fort Morgan
Brighton

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Idaho Falls to Denver

Discover the top 3 airlines that operate flights from Idaho Falls to Denver. 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 March 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$43Average$84FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$189Average$281FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$268FlexibilityNo cancel feeOn-timeN/A

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