$28+ Cheap flights from Colorado 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Feb 28 — Mar 71
1 adult, Economy
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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 Colorado to Idaho
Cheapest flights from Colorado to IdahoExplore the most affordable flight options available from Colorado to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
Explore the most affordable flight options available from Colorado to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/279:01 am
DEN
- BOI
Nonstop2h 10m
Frontier
Sun 3/111:56 am
BOI
- DEN
Nonstop2h 00m
Frontier
Deal found 1/28![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 4/29:00 am
DEN
- GEG
Nonstop2h 21m
Frontier
Thu 4/911:06 am
GEG
- DEN
Nonstop2h 14m
Frontier
Deal found 1/27![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/139:01 am
DEN
- BOI
Nonstop2h 10m
Frontier
Sun 2/1511:56 am
BOI
- DEN
Nonstop2h 00m
Frontier
Deal found 1/27![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/199:50 am
DEN
- GEG
Nonstop2h 37m
Frontier
Thu 2/2612:22 pm
GEG
- DEN
Nonstop2h 23m
Frontier
Deal found 1/27![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/229:01 am
DEN
- BOI
Nonstop2h 10m
Frontier
Sun 3/111:56 am
BOI
- DEN
Nonstop2h 00m
Frontier
Deal found 1/28![Frontier logo]()
$86
This Frontier deal was found by Cheapflights users on 1/28. 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 2/159:01 am
DEN
- BOI
Nonstop2h 10m
Frontier
Thu 2/1912:36 pm
BOI
- DEN
Nonstop2h 00m
Frontier
Deal found 1/28![Frontier logo]()
$94
This Booking.com deal was found by Cheapflights users on 1/27. 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.
Fri 2/69:10 am
DEN
- BOI
Nonstop2h 02m
Frontier
Mon 2/912:07 pm
BOI
- DEN
Nonstop2h 00m
Frontier
Deal found 1/27![Frontier logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/209:01 am
DEN
- BOI
Nonstop2h 10m
Frontier
Sun 2/2211:56 am
BOI
- DEN
Nonstop2h 00m
Frontier
Deal found 1/27![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 1/28. 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 2/199:41 am
DEN
- BOI
Nonstop2h 10m
Frontier
Sun 2/2211:56 am
BOI
- DEN
Nonstop2h 00m
Frontier
Deal found 1/28![Frontier logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 2/199:50 am
DEN
- GEG
Nonstop2h 37m
Frontier
Sun 2/223:11 pm
GEG
- DEN
Nonstop2h 21m
Frontier
Deal found 1/26![Frontier logo]()
$108
This Frontier deal was found by Cheapflights users on 1/27. 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 2/269:50 am
DEN
- GEG
Nonstop2h 37m
Frontier
Sun 3/112:59 pm
GEG
- DEN
Nonstop2h 21m
Frontier
Deal found 1/27![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/279:01 am
DEN
- BOI
Nonstop2h 10m
Multiple Airlines
Fri 3/61:00 pm
BOI
- DEN
1 stop5h 56m
Multiple Airlines
Deal found 1/28![Multiple Airlines logo]()
$125
Find flight deals from Colorado to Idaho
Keep the following information in mind while searching for Colorado to Idaho flight deals. Data was last updated January 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $65 (Kiwi.com) |
One-way from | $28 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $200 |
Good round-trip deal | $108 or less |
Good one-way deal | $140 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Colorado 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 January 29, 2026.
Use the filters below to find and compare flights from Colorado to Idaho that are best for you.
Fly from
Colorado
Fly to
Idaho
Route
Depart
Return
Price
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sun 3/1
9:01 am-11:11 am
Nonstop2h 10m
Boise Air Term. Gowen Fld
Mon 3/2
6:00 pm-11:59 pm
1 stop5h 59m
$145
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Thu 4/23
9:10 am-11:08 am
Nonstop1h 58m
Boise Air Term. Gowen Fld
Sun 4/26
11:53 am-1:56 pm
Nonstop2h 03m
$150
DenverIdaho Falls
DEN - IDA
DENIDA
Denver Intl
Sat 6/13
11:45 am-1:24 pm
Nonstop1h 39m
Idaho Falls Fanning Field
Sun 6/14
6:03 pm-7:56 pm
Nonstop1h 53m
$189
DenverIdaho Falls
DEN - IDA
DENIDA
Denver Intl
Fri 6/12
11:45 am-1:24 pm
Nonstop1h 39m
Idaho Falls Fanning Field
Sun 6/14
6:03 pm-7:56 pm
Nonstop1h 53m
$189
DenverIdaho Falls
DEN - IDA
DENIDA
Denver Intl
Thu 2/26
8:00 am-9:48 am
Nonstop1h 48m
Idaho Falls Fanning Field
Sat 2/28
5:33 pm-7:25 pm
Nonstop1h 52m
$189
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Tue 3/3
7:40 am-6:12 pm
2 stops11h 32m
Spokane
Thu 3/5
12:22 pm-3:45 pm
Nonstop2h 23m
$191
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Sun 3/15
9:10 am-10:47 am
Nonstop2h 37m
Spokane
Thu 3/19
11:32 am-2:55 pm
Nonstop2h 23m
$194
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Mon 3/2
6:40 am-1:11 pm
1 stop6h 31m
Boise Air Term. Gowen Fld
Mon 3/9
6:00 am-9:28 am
1 stop3h 28m
$197
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Thu 2/26
5:30 am-9:45 am
1 stop4h 15m
Boise Air Term. Gowen Fld
Sun 3/1
5:35 am-9:24 am
1 stop3h 49m
$197
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Fri 2/27
12:30 pm-8:15 pm
1 stop7h 45m
Boise Air Term. Gowen Fld
Sun 3/1
5:35 am-9:24 am
1 stop3h 49m
$197
Showing 1-10 of 60 results
Best time to book a flight from Colorado to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Colorado 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 Colorado to Idaho
What is the cheapest month to book a flight from Colorado to Idaho?
Currently, May is the cheapest month in which you can book a flight from Colorado to Idaho (average of $37). Flying from Colorado to Idaho in April 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 CO to ID?
Find hourly flight availability from Colorado 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 January 29, 2026.
It’s typically best to fly out from Colorado to Idaho in the afternoon. Doing so could potentially save you 36% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from Colorado to Idaho?
Use this chart to determine the cheapest time to fly round-trip from Colorado to Idaho. Price data was last updated on January 24, 2026.
Travelers seeking maximum savings on their Colorado 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 Colorado to Idaho
Explore weekly flight availability from Colorado 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 January 29, 2026.
The most flights from USCO to USID are scheduled on a Monday (16 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 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 January 29, 2026.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Colorado to Idaho by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Colorado to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Colorado to Idaho
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Colorado to Idaho
Discover the top 5 airlines that operate flights from Colorado 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 January 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$40 | Average$88 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$54 | Average$130 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$97 | Average$312 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$157 | Average$370 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$197 | Average$346 | FlexibilityNo cancel fee | On-time63% |