HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$46+ Cheap flights from Denver (DEN) to Idaho

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 6/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Idaho 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.

Cheap flight deals from Denver to Idaho

Keep the following information in mind while searching for Denver to Idaho flight deals. Data was last updated June 12, 2025.

Round-trip from

$84
(Booking.com)

One-way from

$46
(Booking.com)

Popular in

December

Cheapest in

May

Average price

$295

Good round-trip deal

$91 or less

Good one-way deal

$42 or less
From Denver Intl to Idaho
Search Deals
One-way flight from Denver Intl to Idaho
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals
Price to beat on a round-trip flight from Denver Intl to Idaho.
Search Deals
Price to beat on a one-way flight from Denver Intl to Idaho.
Search Deals

Find flight deals from Denver to Idaho

Cheapest flights from Denver to Idaho
Explore the most affordable flight options available from Denver to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/63:20 pmDEN - IDA
Nonstop1h 44mAllegiant Air
Sun 7/135:49 pmIDA - DEN
Nonstop1h 48mAllegiant Air
Deal found 6/11$84
This Frontier deal was found by Cheapflights users on 6/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/209:42 amDEN - GEG
Nonstop2h 21mFrontier
Thu 7/2411:58 amGEG - DEN
Nonstop2h 19mFrontier
Deal found 6/11$139
This Frontier deal was found by Cheapflights users on 6/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/29:48 amDEN - BOI
Nonstop1h 55mFrontier
Sun 10/512:53 pmBOI - DEN
Nonstop2h 00mFrontier
Deal found 6/12$149
This Delta deal was found by Cheapflights users on 6/11. 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.
Tue 7/295:30 amDEN - GEG
1 stop4h 23mDelta
Wed 8/65:10 pmGEG - DEN
1 stop4h 01mDelta
Deal found 6/11$177
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/89:05 pmDEN - IDA
Nonstop1h 46mUnited Airlines
Tue 7/156:03 pmIDA - DEN
Nonstop1h 42mUnited Airlines
Deal found 6/10$189
This Agoda.com deal was found by Cheapflights users on 6/12. 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 Agoda.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/211:40 amDEN - BOI
1 stop5h 10mHawaiian Airlines
Mon 10/67:21 amBOI - DEN
1 stop6h 39mHawaiian Airlines
Deal found 6/12$191
This Delta deal was found by Cheapflights users on 6/10. 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.
Tue 7/13:55 pmDEN - JAC
1 stop5h 03mDelta
Fri 7/47:09 amJAC - DEN
1 stop8h 25mDelta
Deal found 6/10$209
This United Airlines deal was found by Cheapflights users on 6/11. 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 7/117:00 pmDEN - SUN
Nonstop2h 02mUnited Airlines
Sun 7/207:00 amSUN - DEN
Nonstop2h 08mUnited Airlines
Deal found 6/11$209
This Delta deal was found by Cheapflights users on 6/9. 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 7/97:10 amDEN - IDA
1 stop3h 24mDelta
Wed 7/166:52 pmIDA - DEN
1 stop3h 19mDelta
Deal found 6/9$209
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 9/306:17 pmDEN - BOI
1 stop5h 42mAlaska Airlines
Tue 10/77:21 amBOI - DEN
1 stop6h 39mAlaska Airlines
Deal found 6/11$210
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:45 amDEN - BOI
Nonstop1h 57mUnited Airlines
Mon 10/67:00 amBOI - DEN
Nonstop1h 55mUnited Airlines
Deal found 6/10$211
This Expedia deal was found by Cheapflights users on 6/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1511:40 amDEN - GEG
1 stop7h 07mMultiple Airlines
Thu 7/1711:58 amGEG - DEN
Nonstop2h 19mMultiple Airlines
Deal found 6/11$212

Cheapflights Fare Finder

Customize your flight search to find flights from Denver to Idaho 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 June 12, 2025.
Use the filters below to find and compare flights from Denver to Idaho that are best for you.

Fly from

Denver

Fly to

Idaho

Route

Depart

Return

Price

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Sun 7/6

3:20 pm-5:04 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Sun 7/13

5:49 pm-7:37 pm

Nonstop1h 48m

$84

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Sun 7/20

9:42 am-11:03 am

Nonstop2h 21m

Spokane

Thu 7/24

11:58 am-3:17 pm

Nonstop2h 19m

$139

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 9/4

9:48 am-11:43 am

Nonstop1h 55m

Boise Air Term. Gowen Fld

Thu 9/11

12:53 pm-2:53 pm

Nonstop2h 00m

$149

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Tue 7/29

5:30 am-8:53 am

1 stop4h 23m

Spokane

Wed 8/6

5:10 pm-10:11 pm

1 stop4h 01m

$177

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Tue 7/8

9:05 pm-10:51 pm

Nonstop1h 46m

Idaho Falls Fanning Field

Tue 7/15

6:03 pm-7:45 pm

Nonstop1h 42m

$189

DenverJackson

DEN - JAC

DENJAC

Denver Intl

Tue 7/1

3:55 pm-8:58 pm

1 stop5h 03m

Jackson Hole

Fri 7/4

7:09 am-3:34 pm

1 stop8h 25m

$209

DenverHailey

DEN - SUN

DENSUN

Denver Intl

Fri 7/11

7:00 pm-9:02 pm

Nonstop2h 02m

Hailey Sun Valley-Friedman

Sun 7/20

7:00 am-9:08 am

Nonstop2h 08m

$209

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Wed 7/9

7:10 am-10:34 am

1 stop3h 24m

Idaho Falls Fanning Field

Wed 7/16

6:52 pm-10:11 pm

1 stop3h 19m

$209

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Wed 9/3

11:40 am-4:50 pm

1 stop5h 10m

Boise Air Term. Gowen Fld

Mon 9/15

4:34 pm-9:47 pm

1 stop5h 13m

$210

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Tue 8/5

8:40 am-10:35 am

Nonstop1h 55m

Boise Air Term. Gowen Fld

Wed 8/13

4:05 pm-6:00 pm

Nonstop1h 55m

$211

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Denver to Idaho

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

What is the cheapest month to book a flight from Denver to Idaho?

Currently, October is the cheapest month in which you can book a flight from Denver to Idaho (average of $314). Flying from Denver to Idaho in June is currently the most expensive (average of $395). 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 ID?

Find hourly flight availability from Denver to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Idaho as you normally would.

Weekly flight availability from Denver to Idaho

Explore weekly flight availability from Denver to Idaho. 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 June 12, 2025.

The most flights from DEN to USID are scheduled on a Monday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Idaho by month

Plan your trip to Idaho by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

Plan your trip to Idaho by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Idaho, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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. Reviews last updated June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Denver to Idaho to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Denver to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Denver to Idaho?

    Located just 18.5 mi from the city center, Denver Intl (DEN) is the airport most travelers will use when flying to Idaho from Denver.

  • How popular is this Denver to Idaho flight route?

    Flights from Denver Intl to Idaho have been viewed 2 times in the past calendar month.

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

    The cheapest airline one-way is Allegiant Air, with whom users have recently found tickets for as low as $46. However, be on the lookout for offers from Frontier and Hawaiian Airlines, as they are both options that can get you from Denver to Idaho for a low price.

  • What are the most popular routes from Denver to Idaho?

    Most travelers choose Denver Intl - Spokane, Denver Intl - Boise Air Term. Gowen Fld or Denver Intl - Jackson Hole when deciding on the best route from Denver to Idaho.

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

    Consider Frontier (88%), SkyWest Airlines (81%) or United Airlines (78%) when booking your flight. These represent the most reliable airlines when flying from Denver to Idaho.

  • What are the cheapest flights from Denver to Idaho?

    On average you can expect to pay $161 for a flight from Denver to Idaho. The cheapest flight overall is $59 while the most popular route, (Denver Intl - Spokane) is currently priced at $155.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver to Idaho 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?

    Currently, October is the cheapest month in which you can book a flight from Denver to Idaho (average of $314). Flying from Denver to Idaho in June is currently the most expensive (average of $395). 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

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

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Las Vegas flights
Denver to Seattle flights
Denver to LaGuardia flights
Denver to O'Hare Intl flights
Denver to John F Kennedy Intl flights
Denver to Los Angeles flights
Denver to Orlando flights
Denver to Newark flights
Denver to Boston flights
Denver to Dallas/Fort Worth flights
Denver to San Francisco flights
Denver to Miami flights
Denver to San Diego flights
Denver to Honolulu flights
Denver to Philadelphia flights
Denver to Baltimore flights
Denver to Minneapolis flights
Denver to Hobby flights
Denver to Portland flights
Denver to Detroit flights
Denver to Reagan-National flights
Denver to Dulles Intl flights
Denver to Tampa flights
Denver to New Orleans flights
Denver to Ontario flights
Denver to Sky Harbor Intl flights
Denver to Kahului flights
Denver to Santa Ana flights
Denver to Atlanta flights
Denver to George Bush Intcntl flights
Denver to Midway flights
Denver to Fort Lauderdale flights
Denver to Portland flights
Denver to Charlotte flights
Denver to Milwaukee flights
Denver to Grand Rapids flights
Denver to Raleigh flights
Denver to Lihue flights
Denver to St. Louis flights
Denver to Nashville flights
Denver to Cleveland flights
Denver to Austin flights
Denver to Anchorage flights
Denver to Traverse City flights
Denver to Sacramento flights
Denver to Madison flights
Denver to Pensacola flights
Denver to Hartford flights
Denver to Reno flights
Denver to San Jose flights

Top 6 airlines flying from Denver to Idaho

Discover the top 6 airlines that operate flights from Denver to Idaho. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$42Average$89FlexibilityNo cancel feeOn-time88%
FrontierCheapest$59Average$128FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$419FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$168Average$235FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$189Average$371FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$292FlexibilityNo cancel feeOn-time63%

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.