$32+ 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Jan 11 — Jan 181
1 adult, Economy
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Cheapest flights from Denver to IdahoExplore 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 December 12, 2025.
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 December 12, 2025.
This Frontier deal was found by Cheapflights users on 12/11. 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.
Tue 12/309:36 amDEN - GEG
Nonstop2h 31mFrontier
Sun 1/44:48 pmGEG - DEN
1 stop6h 37mFrontier
Deal found 12/11![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:36 amDEN - GEG
Nonstop2h 31mFrontier
Tue 12/3012:02 pmGEG - DEN
Nonstop2h 42mFrontier
Deal found 12/10![Frontier logo]()
$188
This Frontier deal was found by Cheapflights users on 12/11. 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.
Sat 12/279:52 amDEN - BOI
Nonstop2h 07mFrontier
Thu 1/112:38 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 12/11![Frontier logo]()
$206
This Frontier deal was found by Cheapflights users on 12/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/189:36 amDEN - BOI
Nonstop2h 07mFrontier
Thu 1/112:38 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 12/10![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 12/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:15 amDEN - GEG
1 stop10h 38mFrontier
Sun 12/214:48 pmGEG - DEN
1 stop6h 37mFrontier
Deal found 12/10![Frontier logo]()
$212
This Frontier deal was found by Cheapflights users on 12/11. 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.
Sat 12/279:52 amDEN - BOI
Nonstop2h 07mFrontier
Sat 1/312:54 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 12/11![Frontier logo]()
$215
This Orbitz deal was found by Cheapflights users on 12/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:15 amDEN - GEG
1 stop10h 38mFrontier
Sat 12/2712:02 pmGEG - DEN
Nonstop2h 42mFrontier
Deal found 12/11![Frontier logo]()
$216
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/269:05 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Tue 12/306:40 amIDA - DEN
Nonstop2h 02mUnited Airlines
Deal found 12/11![United Airlines logo]()
$219
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Mon 12/299:05 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Wed 1/74:19 pmIDA - DEN
Nonstop1h 54mUnited Airlines
Deal found 12/10![United Airlines logo]()
$232
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Thu 12/189:05 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Thu 1/82:40 pmIDA - DEN
Nonstop1h 51mUnited Airlines
Deal found 12/11![United Airlines logo]()
$234
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:20 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Fri 1/25:00 amIDA - DEN
Nonstop2h 03mUnited Airlines
Deal found 12/9![United Airlines logo]()
$243
This Frontier deal was found by Cheapflights users on 12/11. 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.
Thu 12/259:36 amDEN - BOI
Nonstop2h 07mFrontier
Sun 12/2812:38 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 12/11![Frontier logo]()
$245
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 December 12, 2025.
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $66 (Frontier) |
One-way from | $32 (Kiwi.com) |
Popular in | February |
Cheapest in | September |
Average price | $284 |
Good round-trip deal | $98 or less |
Good one-way deal | $121 or less |
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 December 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
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Thu 2/19
9:41 am-11:43 am
Nonstop2h 02m
Boise Air Term. Gowen Fld
Sun 2/22
11:48 am-1:48 pm
Nonstop2h 00m
$66
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Thu 1/15
9:00 am-10:37 am
Nonstop2h 37m
Spokane
Sun 1/18
11:22 am-2:45 pm
Nonstop2h 23m
$135
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sat 1/10
7:00 am-12:51 pm
1 stop5h 51m
Boise Air Term. Gowen Fld
Sun 1/18
2:01 pm-4:01 pm
Nonstop2h 00m
$143
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Thu 1/8
10:53 am-12:24 pm
Nonstop2h 31m
Spokane
Sun 1/11
8:58 pm-8:20 pm
2 stops22h 22m
$153
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Fri 2/6
1:45 pm-3:50 pm
Nonstop2h 05m
Boise Air Term. Gowen Fld
Sun 2/8
7:45 am-9:45 am
Nonstop2h 00m
$177
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Thu 1/22
11:30 am-1:35 pm
Nonstop2h 05m
Boise Air Term. Gowen Fld
Sun 1/25
2:37 pm-4:36 pm
Nonstop1h 59m
$177
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sat 1/10
12:30 pm-6:28 pm
1 stop5h 58m
Boise Air Term. Gowen Fld
Sun 1/18
5:40 am-12:27 pm
1 stop6h 47m
$185
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Fri 1/16
6:29 am-1:00 pm
1 stop6h 31m
Boise Air Term. Gowen Fld
Sun 1/18
5:40 am-12:27 pm
1 stop6h 47m
$185
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sat 1/17
12:30 pm-6:28 pm
1 stop5h 58m
Boise Air Term. Gowen Fld
Tue 1/20
9:15 am-5:34 pm
1 stop8h 19m
$185
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Thu 2/19
12:30 pm-6:22 pm
1 stop5h 52m
Boise Air Term. Gowen Fld
Sun 2/22
4:55 pm-11:25 pm
1 stop6h 30m
$185
Showing 1-10 of 60 results
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 March is currently the most expensive (average of $197). 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 December 12, 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 December 6, 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. Monday afternoons 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 December 12, 2025.
The most flights from DEN to USID are scheduled on a Thursday (17 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (12 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 December 12, 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.
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
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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.
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 December 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$44 | Average$88 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$59 | Average$135 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$327 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$189 | Average$366 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$197 | Average$284 | FlexibilityNo cancel fee | On-time63% |