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Cheap flights from Denver to Idaho Falls from $50

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Idaho Falls departing on 8/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Denver to Idaho Falls (DEN-IDA)

Cheap round-trip flights

Allegiant Air Logo
3:24 pm - 5:06 pmDEN-IDA
1h 42mnonstop
Allegiant Air Logo
5:51 pm - 7:39 pmIDA-DEN
1h 48mnonstop
$84Allegiant Air
Find Deal
Sun, Aug 17 - Thu, Aug 21
United Airlines Logo
7:10 pm - 8:54 pmDEN-IDA
1h 44mnonstop
United Airlines Logo
4:00 pm - 5:46 pmIDA-DEN
1h 46mnonstop
$189United Airlines
Find Deal
Wed, Sep 3 - Sat, Sep 6
Delta Logo
6:25 pm - 10:27 pmDEN-IDA
4h 02m1 stop
Delta Logo
3:00 pm - 7:46 pmIDA-DEN
4h 46m1 stop
$209Delta
Find Deal
Tue, Sep 2 - Tue, Sep 9
Delta Logo
5:45 am - 10:39 amDEN-IDA
4h 54m1 stop
Delta Logo
6:00 am - 11:51 amIDA-DEN
5h 51m1 stop
$214Delta
Find Deal
Wed, Aug 20 - Sat, Aug 23
Delta Logo
6:25 pm - 10:27 pmDEN-IDA
4h 02m1 stop
Delta Logo
6:00 am - 9:14 amIDA-DEN
3h 14m1 stop
$239Delta
Find Deal
Mon, Aug 25 - Mon, Sep 1
United Airlines Logo
8:01 am - 9:48 amDEN-IDA
1h 47mnonstop
United Airlines Logo
4:15 pm - 6:05 pmIDA-DEN
1h 50mnonstop
$249United Airlines
Find Deal
Wed, Nov 5 - Sun, Nov 9
American Airlines Logo
5:44 am - 12:59 pmDEN-IDA
7h 15m1 stop
American Airlines Logo
6:44 am - 1:57 pmIDA-DEN
7h 13m1 stop
$331American Airlines
Find Deal
Mon, Sep 22 - Tue, Sep 23
Alaska Airlines Logo
1:06 pm - 10:39 pmDEN-IDA
9h 33m1 stop
Alaska Airlines Logo
6:00 am - 11:47 pmIDA-DEN
17h 47m2 stops
$360Alaska Airlines
Find Deal
Wed, Sep 24 - Wed, Oct 8
Alaska Airlines Logo
8:20 am - 11:59 pmDEN-IDA
15h 39m2 stops
Alaska Airlines Logo
3:50 pm - 11:59 pmIDA-DEN
8h 09m1 stop
$388Alaska Airlines
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Wed, Nov 5 - Sun, Nov 9
American Airlines Logo
12:41 pm - 9:25 pmDEN-IDA
8h 44m1 stop
American Airlines Logo
6:44 am - 1:57 pmIDA-DEN
7h 13m1 stop
$491American Airlines
Find Deal
Thu, Sep 4 - Mon, Sep 8

Alaska Airlines flights from Denver to Idaho Falls

Our best Alaska Airlines deals on Denver to Idaho Falls flight tickets
Alaska Airlines
Sep 24
DEN1:06 pmDenver Intl
9h 33m
1 stop
IDA10:39 pmIdaho Falls Fanning Field
Oct 8
IDA6:00 amIdaho Falls Fanning Field
17h 47m
2 stops
DEN11:47 pmDenver Intl
$360
Find similar
Alaska Airlines
Nov 5
DEN8:20 amDenver Intl
15h 39m
2 stops
IDA11:59 pmIdaho Falls Fanning Field
Nov 9
IDA3:50 pmIdaho Falls Fanning Field
8h 09m
1 stop
DEN11:59 pmDenver Intl
$388
Find similar
Alaska Airlines
Oct 15
DEN7:01 amDenver Intl
15h 37m
2 stops
IDA10:38 pmIdaho Falls Fanning Field
Oct 19
IDA6:00 amIdaho Falls Fanning Field
17h 47m
2 stops
DEN11:47 pmDenver Intl
$391
Find similar

United Airlines flights from Denver to Idaho Falls

Our best United Airlines deals on Denver to Idaho Falls flight tickets
United Airlines
Sep 3
DEN7:10 pmDenver Intl
1h 44m
IDA8:54 pmIdaho Falls Fanning Field
Sep 6
IDA4:00 pmIdaho Falls Fanning Field
1h 46m
DEN5:46 pmDenver Intl
$189
Find similar
United Airlines
Nov 5
DEN8:01 amDenver Intl
1h 47m
IDA9:48 amIdaho Falls Fanning Field
Nov 9
IDA4:15 pmIdaho Falls Fanning Field
1h 50m
DEN6:05 pmDenver Intl
$249
Find similar
United Airlines
Aug 20
DEN9:05 pmDenver Intl
1h 43m
IDA10:48 pmIdaho Falls Fanning Field
Aug 23
IDA5:00 amIdaho Falls Fanning Field
1h 55m
DEN6:55 amDenver Intl
$254
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 4, 2025.
Use the filters below to find and compare flights from Denver to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sun 8/17

3:24 pm-5:06 pm

Nonstop1h 42m

Idaho Falls Fanning Field

Thu 8/21

5:51 pm-7:39 pm

Nonstop1h 48m

$84

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Wed 9/3

7:10 pm-8:54 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Sat 9/6

4:00 pm-5:46 pm

Nonstop1h 46m

$189

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Tue 9/2

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

$209

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Wed 8/20

5:45 am-10:39 am

1 stop4h 54m

Idaho Falls Fanning Field

Sat 8/23

6:00 am-11:51 am

1 stop5h 51m

$214

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Mon 8/25

6:25 pm-10:27 pm

1 stop4h 02m

Idaho Falls Fanning Field

Mon 9/1

6:00 am-9:14 am

1 stop3h 14m

$239

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Wed 11/5

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

Mon 9/22

5:44 am-12:59 pm

1 stop7h 15m

Idaho Falls Fanning Field

Tue 9/23

6:44 am-1:57 pm

1 stop7h 13m

$331

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Wed 9/24

1:06 pm-10:39 pm

1 stop9h 33m

Idaho Falls Fanning Field

Wed 10/8

6:00 am-11:47 pm

2 stops17h 47m

$360

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Wed 11/5

8:20 am-11:59 pm

2 stops15h 39m

Idaho Falls Fanning Field

Sun 11/9

3:50 pm-11:59 pm

1 stop8h 09m

$388

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Thu 9/4

12:41 pm-9:25 pm

1 stop8h 44m

Idaho Falls Fanning Field

Mon 9/8

6:44 am-1:57 pm

1 stop7h 13m

$491

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Idaho Falls from

How to get the cheapest flight ticket from Denver to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of June, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $208.

What is the cheapest day to depart on your flight to Idaho Falls?

Our data shows that Thursday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $240. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Sunday is $427.

What is the cheapest time of day to depart on your flight to Idaho Falls?

Our most recent data shows that the best time of day to fly to Idaho Falls is in the afternoon. Flights from Denver to Idaho Falls during this time can be as low as $277. Try not to purchase tickets in the evening because they tend to be around $389. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Denver Intl to Idaho Falls Fanning Field flight route?

Fly from Denver Intl to Idaho Falls Fanning Field for the best Denver Intl - Idaho Falls Fanning Field flight prices

How far in advance should I book a flight to Idaho Falls?

You are more likely to see cheaper flights to Idaho Falls from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho Falls for around $329 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho Falls from Denver for as low as $131 on momondo.

What cabin class options are available on Denver Intl to Idaho Falls Fanning Field flights?

There are 3 cabin classes available to choose from on Denver Intl to Idaho Falls Fanning Field flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Denver to Idaho Falls flight prices changed over time?

As of August 2025, prices for Denver to Idaho Falls flights are approximately 77% cheaper when compared to flights at the same time last year.

When to book flights from Denver to Idaho Falls

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to Idaho Falls according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Denver to Idaho Falls (DEN to IDA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to Idaho Falls

Best Price Found

$50

Fastest flight time

1h 40m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from Denver in the past 72 hours is $50. The best round-trip flight deal from Denver to Idaho Falls found on momondo in the last 72 hours is $84.
The fastest flight from Denver to Idaho Falls takes 1h 40m
Direct flights go from Denver to Idaho Falls on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. Airlines offering direct flights are: United Airlines and Allegiant Air.
There is 1 airport near Idaho Falls: Idaho Falls Fanning Field (IDA)
Search flight deals

  • How far is Denver Intl to Idaho Falls Fanning Field by plane?

    There are 445.5 mi between Denver Intl and Idaho Falls Fanning Field. By plane, this route typically takes 1h 40m.

  • When did momondo last update prices for flights from Denver Intl Airport to Idaho Falls Fanning Field Airport?

    Prices for flights from Denver Intl Airport to Idaho Falls Fanning Field Airport were last updated today.

  • How many operators does momondo search for flights from Denver Intl Airport to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from Denver Intl Airport to Idaho Falls Fanning Field Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The required travel and health documents for your Idaho Falls Fanning Field Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Denver to Idaho Falls?

  • What is the most popular airline from Denver to Idaho Falls?

Best airlines flying from Denver to Idaho Falls

Compare and see reviews for airlines that fly from Denver to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $44Free CancellationRating
7.2
702 reviews
Search Allegiant Air flights
United AirlinesPriceFrom $218Free CancellationRating
7.4
8,912 reviews
Search United Airlines flights

  • United Airlines Flights From Denver to Idaho Falls

    United Airlines flies from Denver to Idaho Falls around 42 times per week, with 8,912 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Denver to Idaho Falls in the last 72 hours was $218 (round-trip), much lower than the average airfare cost of $344 for United Airlines flights on this route.

  • Allegiant Air Flights From Denver to Idaho Falls

    Allegiant Air (7.2/10 from 702 reviews) operates around 2 flights from Denver to Idaho Falls in any given week. The average Allegiant Air airfare for this route is around $88, with deals from around $44 rare but found on momondo. Referenced prices are for round-trip Denver to Idaho Falls flight searches in the last 72 hours.

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

Why use momondo?

Why should I use momondo to find a flight deal from Denver to Idaho Falls?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Denver to Idaho Falls. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Denver to Idaho Falls with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Denver to Idaho Falls flights to just show those with flexible booking policies.

How can momondo help me find flights from Denver to Idaho Falls?

Once all potential Denver to Idaho Falls flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Denver to Idaho Falls right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Denver to Idaho Falls flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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