HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$27+ 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 12/20. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Dec 7 — Dec 141
Sun 12/7
Sun 12/14
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.

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 November 7, 2025.

This Frontier deal was found by Cheapflights users on 11/6. 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.
Fri 12/59:42 amDEN - BOI
Nonstop2h 07mFrontier
Fri 12/1212:44 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 11/6$82
This Frontier deal was found by Cheapflights users on 11/6. 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 12/49:42 amDEN - BOI
Nonstop2h 07mFrontier
Thu 12/1112:44 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 11/6$83
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Sun 12/219:36 amDEN - BOI
Nonstop2h 07mFrontier
Sat 12/2712:54 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 11/6$120
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Sun 12/79:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Fri 12/1210:41 pmBOI - DEN
1 stop10h 23mMultiple Airlines
Deal found 11/6$123
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 12/59:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Wed 12/105:45 amBOI - DEN
1 stop5h 00mMultiple Airlines
Deal found 11/4$125
This Orbitz deal was found by Cheapflights users on 11/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/59:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Tue 12/98:55 amBOI - DEN
1 stop5h 51mMultiple Airlines
Deal found 11/6$126
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 12/59:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Sun 12/79:17 pmBOI - DEN
1 stop11h 38mMultiple Airlines
Deal found 11/6$127
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 12/59:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Fri 12/1210:41 pmBOI - DEN
1 stop10h 23mMultiple Airlines
Deal found 11/6$128
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Sun 12/79:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Tue 12/95:45 amBOI - DEN
1 stop5h 00mMultiple Airlines
Deal found 11/6$129
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 12/59:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Thu 12/119:17 pmBOI - DEN
1 stop13h 54mMultiple Airlines
Deal found 11/6$131
This Frontier deal was found by Cheapflights users on 11/6. 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.
Sat 12/279:52 amDEN - BOI
Nonstop2h 07mFrontier
Sat 1/312:54 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 11/6$133
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
Sat 12/209:36 amDEN - GEG
Nonstop2h 31mMultiple Airlines
Sat 1/311:19 amGEG - DEN
1 stop15h 39mMultiple Airlines
Deal found 11/5$147

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 November 7, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$82
(Frontier)

One-way from

$27
(Priceline)

Popular in

December

Cheapest in

September

Average price

$331

Good round-trip deal

$170 or less

Good one-way deal

$125 or less
Provider with most accurate pricing for Denver Intl-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Boise Air Term. Gowen Fld flights.
Search Deals
From Denver Intl to Idaho
Search Deals
One-way flight from Denver Intl to Idaho
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($14 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.
Search Deals
Price to beat on a one-way flight from Denver Intl to Idaho.
Search Deals

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 November 7, 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

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Sat 12/13

6:05 am-12:29 pm

1 stop7h 24m

Spokane

Mon 12/15

5:05 am-11:32 am

1 stop5h 27m

$185

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Wed 12/3

7:45 pm-12:11 am

1 stop5h 26m

Spokane

Mon 12/8

11:19 am-6:54 pm

1 stop6h 35m

$185

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Wed 12/3

12:25 pm-6:56 pm

1 stop7h 31m

Spokane

Wed 12/10

5:05 am-11:32 am

1 stop5h 27m

$185

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Fri 12/19

6:02 am-10:26 pm

1 stop16h 24m

Boise Air Term. Gowen Fld

Sun 12/21

12:38 pm-2:39 pm

Nonstop2h 01m

$189

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Tue 1/20

11:49 am-6:43 pm

1 stop7h 54m

Spokane

Sat 1/24

3:00 pm-11:58 pm

1 stop7h 58m

$189

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Fri 2/13

8:05 am-10:10 am

Nonstop2h 05m

Boise Air Term. Gowen Fld

Sun 2/15

6:30 am-11:15 am

1 stop4h 45m

$196

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 2/26

6:29 am-1:06 pm

1 stop6h 37m

Boise Air Term. Gowen Fld

Sun 3/1

4:49 pm-11:25 pm

1 stop6h 36m

$197

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Sat 12/6

5:30 am-12:30 pm

2 stops8h 00m

Spokane

Sat 12/13

1:10 pm-6:54 pm

1 stop4h 44m

$200

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Wed 1/14

11:30 am-1:35 pm

Nonstop2h 05m

Boise Air Term. Gowen Fld

Sun 1/18

9:48 am-12:00 pm

Nonstop2h 12m

$202

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Fri 2/13

6:29 am-1:06 pm

1 stop6h 37m

Boise Air Term. Gowen Fld

Sun 2/15

5:40 am-12:11 pm

1 stop6h 31m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

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, May is the cheapest month in which you can book a flight from Denver to Idaho (average of $37). Flying from Denver to Idaho in January is currently the most expensive (average of $216). 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 November 7, 2025.

A simple way to save on the total cost of your ticket is to fly from Denver to Idaho in the evening. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Denver to Idaho?

Use this chart to determine the cheapest time to fly round-trip from Denver to Idaho. Price data was last updated on November 2, 2025.

Travelers seeking maximum savings on their Denver to Idaho flight should consider departing on Thursday afternoons when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 7, 2025.

The most flights from DEN to USID are scheduled on a Thursday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

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 November 7, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Denver to Idaho have to say. 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.
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
8,001 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,007 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Allegiant Air
7.2
Good
697 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,116 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 9 times in the past calendar month.

  • How long is the flight from Denver to Idaho?

    For as low as $196, Delta can have you in Idaho from Denver in 2h 05m. The distance from Denver to Idaho is about 647 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $28. However, be on the lookout for offers from Delta and Alaska 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 - Boise Air Term. Gowen Fld, Denver Intl - Spokane 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 SkyWest Airlines (86%), United Airlines (85%) or Southwest (83%) 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 $192 for a flight from Denver to Idaho. The cheapest flight overall is $52 while the most popular route, (Denver Intl - Boise Air Term. Gowen Fld) is currently priced at $125.

  • 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, May is the cheapest month in which you can book a flight from Denver to Idaho (average of $37). Flying from Denver to Idaho in January is currently the most expensive (average of $216). 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 John F Kennedy Intl flights
Denver to Dallas/Fort Worth flights
Denver to O'Hare Intl flights
Denver to LaGuardia flights
Denver to Orlando flights
Denver to Miami flights
Denver to Newark flights
Denver to Sky Harbor Intl flights
Denver to Los Angeles flights
Denver to Seattle flights
Denver to Tampa flights
Denver to Boston flights
Denver to Midway flights
Denver to Atlanta flights
Denver to San Francisco flights
Denver to Ontario flights
Denver to Fort Lauderdale flights
Denver to Hobby flights
Denver to Dulles Intl flights
Denver to Philadelphia flights
Denver to Honolulu flights
Denver to Baltimore flights
Denver to San Diego flights
Denver to Detroit flights
Denver to Reagan-National flights
Denver to George Bush Intcntl flights
Denver to New Orleans flights
Denver to Charlotte flights
Denver to Santa Ana flights
Denver to Portland flights
Denver to Austin flights
Denver to Minneapolis flights
Denver to Kahului flights
Denver to Fort Myers flights
Denver to Love Field flights
Denver to Salt Lake City flights
Denver to Nashville flights
Denver to Cleveland flights
Denver to Milwaukee flights
Denver to Cincinnati flights
Denver to Indianapolis flights
Denver to Raleigh flights
Denver to West Palm Beach flights
Denver to Kailua-Kona flights
Denver to San Antonio flights
Denver to Palm Springs flights
Denver to St. Louis flights
Denver to Charleston flights
Denver to Lihue flights

Top 5 airlines flying from Denver to Idaho

Discover the top 5 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 November 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$44Average$88FlexibilityNo cancel feeOn-time88%
FrontierCheapest$58Average$139FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$333FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$194Average$366FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$288FlexibilityNo 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.