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Idaho

$95+ 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 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Jun 25 — Jul 21
Thu 6/25
Thu 7/2
1 adult, Economy
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Cheap 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 May 26, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/23. 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.
Tue 7/1410:29 am
DEN
-
BOI
Nonstop2h 00m
Frontier
Tue 7/211:24 pm
BOI
-
DEN
Nonstop2h 06m
Frontier
Deal found 5/23$188
This Kiwi.com deal was found by Cheapflights users on 5/24. 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.
Tue 6/2310:29 am
DEN
-
BOI
Nonstop2h 01m
Frontier
Tue 6/301:25 pm
BOI
-
DEN
Nonstop2h 23m
Frontier
Deal found 5/24$192
This Frontier deal was found by Cheapflights users on 5/21. 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.
Tue 6/1610:29 am
DEN
-
BOI
Nonstop2h 01m
Frontier
Tue 6/231:25 pm
BOI
-
DEN
Nonstop2h 23m
Frontier
Deal found 5/21$194
This Kiwi.com deal was found by Cheapflights users on 5/21. 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.
Thu 8/1310:29 am
DEN
-
BOI
Nonstop2h 00m
Frontier
Sun 8/161:24 pm
BOI
-
DEN
Nonstop2h 06m
Frontier
Deal found 5/21$199
This Frontier deal was found by Cheapflights users on 5/25. 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 9/249:55 am
DEN
-
BOI
Nonstop2h 09m
Frontier
Tue 9/2912:59 pm
BOI
-
DEN
Nonstop2h 01m
Frontier
Deal found 5/25$204
This Kiwi.com deal was found by Cheapflights users on 5/21. 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 10/177:50 am
DEN
-
BOI
1 stop5h 24m
Multiple Airlines
Tue 10/2012:23 pm
BOI
-
DEN
Nonstop2h 01m
Multiple Airlines
Deal found 5/21$205
This Priceline deal was found by Cheapflights users on 5/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/610:29 am
DEN
-
BOI
Nonstop2h 00m
Frontier
Tue 8/111:24 pm
BOI
-
DEN
Nonstop2h 06m
Frontier
Deal found 5/25$211
This Frontier deal was found by Cheapflights users on 5/21. 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.
Tue 6/3010:29 am
DEN
-
BOI
Nonstop2h 01m
Frontier
Tue 7/71:24 pm
BOI
-
DEN
Nonstop2h 06m
Frontier
Deal found 5/21$216
This Kiwi.com deal was found by Cheapflights users on 5/24. 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.
Tue 6/1610:29 am
DEN
-
BOI
Nonstop2h 01m
Frontier
Thu 6/181:25 pm
BOI
-
DEN
Nonstop2h 23m
Frontier
Deal found 5/24$218
This Frontier deal was found by Cheapflights users on 5/21. 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.
Tue 6/1610:29 am
DEN
-
BOI
Nonstop2h 01m
Frontier
Thu 6/251:25 pm
BOI
-
DEN
Nonstop2h 23m
Frontier
Deal found 5/21$221
This United Airlines deal was found by Cheapflights users on 5/24. 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.
Sun 6/212:10 pm
DEN
-
WYS
Nonstop1h 52m
United Airlines
Sun 6/285:45 pm
WYS
-
DEN
Nonstop1h 45m
United Airlines
Deal found 5/24$243
This United Airlines deal was found by Cheapflights users on 5/21. 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 11/137:45 am
DEN
-
IDA
Nonstop1h 43m
United Airlines
Mon 11/165:57 pm
IDA
-
DEN
Nonstop1h 43m
United Airlines
Deal found 5/21$249

Find flight deals from Denver to Idaho

Keep the following information in mind while searching for Denver to Idaho flight deals. Data was last updated May 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$188
(Kiwi.com)

One-way from

$95
(Frontier)

Popular in

April

Cheapest in

February

Average price

$305

Good round-trip deal

$208 or less

Good one-way deal

$158 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 ($64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
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 May 26, 2026.
Use the filters below to find and compare flights from Denver to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverWest Yellowstone

DEN - WYS

DENWYS

Denver Intl

Sun 6/21

2:10 pm-4:02 pm

Nonstop1h 52m

West Yellowstone

Sun 6/28

5:45 pm-7:30 pm

Nonstop1h 45m

$243
Quickest round-trip

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 11/13

7:45 am-9:28 am

Nonstop1h 43m

Idaho Falls Fanning Field

Mon 11/16

5:57 pm-7:40 pm

Nonstop1h 43m

$249

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 11/13

12:45 pm-6:14 pm

1 stop5h 29m

Idaho Falls Fanning Field

Mon 11/16

1:10 pm-7:10 pm

1 stop6h 00m

$269

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Wed 6/17

8:05 am-9:50 am

Nonstop1h 45m

Idaho Falls Fanning Field

Tue 6/23

5:54 pm-7:45 pm

Nonstop1h 51m

$278

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Fri 6/19

7:05 am-10:43 am

1 stop3h 38m

Idaho Falls Fanning Field

Tue 9/1

6:50 pm-10:31 pm

1 stop3h 41m

$284

DenverWest Yellowstone

DEN - WYS

DENWYS

Denver Intl

Fri 6/5

11:37 am-1:32 pm

Nonstop1h 55m

West Yellowstone

Tue 6/9

2:19 pm-4:00 pm

Nonstop1h 41m

$287

DenverWest Yellowstone

DEN - WYS

DENWYS

Denver Intl

Fri 7/10

11:37 am-1:32 pm

Nonstop1h 55m

West Yellowstone

Sun 7/12

5:45 pm-7:30 pm

Nonstop1h 45m

$287

DenverWest Yellowstone

DEN - WYS

DENWYS

Denver Intl

Fri 6/5

11:37 am-1:32 pm

Nonstop1h 55m

West Yellowstone

Mon 6/8

2:19 pm-4:00 pm

Nonstop1h 41m

$293

DenverWest Yellowstone

DEN - WYS

DENWYS

Denver Intl

Sat 6/27

2:37 pm-4:29 pm

Nonstop1h 52m

West Yellowstone

Fri 7/3

5:45 pm-7:30 pm

Nonstop1h 45m

$293

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Tue 10/20

12:31 pm-9:40 pm

1 stop10h 09m

Spokane

Wed 10/21

7:16 am-6:02 pm

1 stop9h 46m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/23

Showing 1-10 of 60 resultsSorted by cheapest first
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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, December is the cheapest month in which you can book a flight from Denver to Idaho (average of $29). Flying from Denver to Idaho in April is currently the most expensive (average of $114). 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 May 26, 2026.

A simple way to save on the total cost of your ticket is to fly from Denver to Idaho in the afternoon. If you’re flexible enough to do this you can expect to save up to 35% on your trip compared to booking a flight at noon.

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 May 26, 2026.

The most flights from DEN to USID are scheduled on a Tuesday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).

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

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

Booking 61 days in advance of your planned departure date is, on average, the best time to get cheap flights from Denver to Idaho. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 May 23, 2026.

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

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 May 26, 2026.
See what other customers who have flown with Southwest,Delta, andUnited 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
7.9
Good
4,265 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
7.9
Good
4,265 reviews
Southwest
7.9
Good
4,265 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,427 reviews
Southwest
7.9
Good
4,265 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,751 reviews
Southwest
7.9
Good
4,265 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Allegiant Air
7.3
Good
710 reviews
Southwest
7.9
Good
4,265 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
2,933 reviews
Southwest
7.9
Good
4,265 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 $243, United Airlines can have you in Idaho from Denver in 1h 52m. The distance from Denver to Idaho is about 468 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 $40. However, be on the lookout for offers from Allegiant Air and Delta, 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 (92%), Copa Airlines (87%) or SkyWest Airlines (87%) 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 $256 for a flight from Denver to Idaho. The cheapest flight overall is $94 while the most popular route, (Denver Intl - Spokane) is currently priced at $299.

  • 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, December is the cheapest month in which you can book a flight from Denver to Idaho (average of $29). Flying from Denver to Idaho in April is currently the most expensive (average of $114). 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.

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Alternative routes for Denver to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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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 May 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$45Average$90FlexibilityNo cancel feeOn-time88%
FrontierCheapest$55Average$130FlexibilityNo cancel feeOn-time62%
DeltaCheapest$68Average$436FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$165Average$361FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$189Average$307FlexibilityNo cancel feeOn-time63%

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