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$71+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — DEN
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheapflights Tip: The best prices from Idaho Falls Fanning Field to Denver Intl are usually found in May or July, booked 89 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap 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 July 29, 2025.

Round-trip from

$84
(Cheapflightsfares)

One-way from

$71
(Cheapflightsfares)

Popular in

March

Cheapest in

May

Average price

$273

Good round-trip deal

$425 or less

Good one-way deal

$272 or less
From Idaho Falls Fanning Field to Denver Intl
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One-way flight from Idaho Falls Fanning Field to Denver Intl
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Highest demand for flights based on searches. 12% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Idaho Falls Fanning Field to Denver Intl.
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Price to beat on a one-way flight from Idaho Falls Fanning Field to Denver Intl.
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Find 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 July 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/285:51 pmIDA - DEN
Nonstop1h 48mAllegiant Air
Sun 8/313:24 pmDEN - IDA
Nonstop1h 42mAllegiant Air
Deal found 7/26$84
This United Airlines deal was found by Cheapflights users on 7/28. 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 8/264:00 pmIDA - DEN
Nonstop1h 46mUnited Airlines
Tue 9/28:00 amDEN - IDA
Nonstop1h 47mUnited Airlines
Deal found 7/28$189
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:52 pmIDA - DEN
1 stop3h 56mDelta
Fri 9/56:25 pmDEN - IDA
1 stop4h 02mDelta
Deal found 7/28$209
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 11/51:58 pmIDA - DEN
1 stop6h 19mAmerican Airlines
Sat 11/86:00 amDEN - IDA
1 stop7h 28mAmerican Airlines
Deal found 7/29$280
This Mytrip deal was found by Cheapflights users on 7/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/105:49 pmIDA - DEN
Nonstop1h 48mMultiple Airlines
Thu 8/1410:15 amDEN - IDA
3 stops25h 15mMultiple Airlines
Deal found 7/28$314
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:00 amIDA - DEN
2 stops13h 10mAlaska Airlines
Mon 10/137:01 amDEN - IDA
2 stops32h 37mAlaska Airlines
Deal found 7/28$367

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 July 29, 2025.
Use the filters below to find and compare flights from Idaho Falls to Denver that are best for you.

Fly from

Idaho Falls

Fly to

Denver

Route

Depart

Return

Price

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Thu 8/28

5:51 pm-7:39 pm

Nonstop1h 48m

Denver Intl

Sun 8/31

3:24 pm-5:06 pm

Nonstop1h 42m

$84

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Tue 8/26

4:00 pm-5:46 pm

Nonstop1h 46m

Denver Intl

Tue 9/2

8:00 am-9:47 am

Nonstop1h 47m

$189

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 1/2

6:45 pm-10:56 pm

1 stop4h 11m

Denver Intl

Sat 1/10

3:40 pm-10:21 pm

1 stop6h 41m

$209

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Wed 11/5

1:58 pm-8:17 pm

1 stop6h 19m

Denver Intl

Sat 11/8

6:00 am-1:28 pm

1 stop7h 28m

$280

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Sun 8/10

5:49 pm-7:37 pm

Nonstop1h 48m

Denver Intl

Thu 8/14

10:15 am-11:30 am

3 stops25h 15m

$314

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Wed 10/8

6:00 am-7:10 pm

2 stops13h 10m

Denver Intl

Mon 10/13

7:01 am-3:38 pm

2 stops32h 37m

$367

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Sun 8/3

5:49 pm-7:37 pm

Nonstop1h 48m

$71

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Tue 9/2

6:00 am-11:51 am

1 stop5h 51m

$169

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Tue 8/19

1:32 pm-7:48 pm

1 stop6h 16m

$181

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Tue 9/16

6:13 am-12:10 pm

1 stop5h 57m

$182

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 12 results
1
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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 July 25, 2025.

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 89 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, October is the cheapest month in which you can book a flight from Idaho Falls to Denver (average of $197). Flying from Idaho Falls to Denver in March is currently the most expensive (average of $278). 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 July 29, 2025.

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 afternoon, which can drop the price by up to 30% versus a flight in the morning.

Weekly flight availability from Idaho Falls to Denver

Explore weekly flight availability from Idaho Falls to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 29, 2025.

The most flights from IDA to DEN are scheduled on a Monday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

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 July 29, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and United Airlines 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Allegiant Air
7.2
Good
702 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 42m 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 28 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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 $84 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $189 and $209 round-trip. Allegiant Air is currently priced 73% below the average price you’ll pay for this route.

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

    One-way options have recently been found by users for as low as $71 on Allegiant Air. Other airlines that offer cheap prices include Delta from $169 and American Airlines from $181 one-way.

  • 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 (68%), United Airlines (68%), Copa Airlines( 37%).

  • 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 $1,148, our data indicates the cheapest price to be $47. The most popular route (Idaho Falls Fanning Field - Denver Intl), is priced around $89.

  • 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, October is the cheapest month in which you can book a flight from Idaho Falls to Denver (average of $197). Flying from Idaho Falls to Denver in March is currently the most expensive (average of $278). 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
Westminster
Black Hawk
Winter Park
Lakewood
Greeley
Cripple Creek
Brighton
Silverthorne
Golden
Thornton
Frisco
Grand Lake
Manitou Springs
Central City
Fort Morgan
Glendale
Copper Mountain
Wheat Ridge
Longmont
Broomfield

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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$43Average$88FlexibilityNo cancel feeOn-time88%
DeltaCheapest$208Average$273FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$214Average$327FlexibilityNo cancel feeOn-time69%

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