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$38+ Cheap flights from Idaho to Colorado

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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — DEN
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Idaho to Colorado

Keep the following information in mind while searching for Idaho to Colorado flight deals. Data was last updated September 15, 2025.

Round-trip from

$108
(Frontier)

One-way from

$38
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$287

Good round-trip deal

$302 or less

Good one-way deal

$166 or less
From Idaho to Colorado
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One-way flight from Idaho to Colorado
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Highest demand for flights based on searches. 5% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Idaho to Colorado.
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Price to beat on a one-way flight from Idaho to Colorado.
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Find flight deals from Idaho to Colorado

Cheapest flights from Idaho to Colorado
Explore the most affordable flight options available from Idaho to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Frontier deal was found by Cheapflights users on 9/13. 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 12/1212:59 pmBOI - DEN
Nonstop2h 01mFrontier
Sun 12/149:57 amDEN - BOI
Nonstop2h 07mFrontier
Deal found 9/13$108
This Trip.com deal was found by Cheapflights users on 9/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1612:28 pmBOI - DEN
Nonstop2h 00mMultiple Airlines
Mon 11/176:46 pmDEN - BOI
1 stop5h 13mMultiple Airlines
Deal found 9/13$111
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/284:57 pmBOI - DEN
1 stop7h 02mHawaiian Airlines
Tue 11/47:00 amDEN - BOI
1 stop5h 36mHawaiian Airlines
Deal found 9/12$125
This Frontier deal was found by Cheapflights users on 9/15. 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 10/912:28 pmBOI - DEN
Nonstop2h 00mFrontier
Sun 10/129:48 amDEN - BOI
Nonstop1h 55mFrontier
Deal found 9/15$130
This Frontier deal was found by Cheapflights users on 9/14. 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 10/912:03 pmGEG - DEN
Nonstop2h 16mFrontier
Thu 10/169:48 amDEN - GEG
Nonstop2h 20mFrontier
Deal found 9/14$140
This Frontier deal was found by Cheapflights users on 9/15. 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 10/211:53 amGEG - DEN
Nonstop2h 19mFrontier
Sun 10/59:38 amDEN - GEG
Nonstop2h 20mFrontier
Deal found 9/15$143
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 9/2612:22 pmBOI - DEN
Nonstop2h 23mFrontier
Sun 9/289:38 amDEN - BOI
Nonstop1h 59mFrontier
Deal found 9/13$148
This Frontier deal was found by Cheapflights users on 9/14. 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 9/2512:22 pmBOI - DEN
Nonstop2h 23mFrontier
Sun 9/289:38 amDEN - BOI
Nonstop1h 59mFrontier
Deal found 9/14$149
This Delta deal was found by Cheapflights users on 9/13. 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 10/15:03 pmGEG - DEN
1 stop4h 41mDelta
Sat 10/46:25 pmDEN - GEG
1 stop5h 04mDelta
Deal found 9/13$153
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 9/2612:22 pmBOI - DEN
Nonstop2h 23mMultiple Airlines
Mon 9/2910:00 amDEN - BOI
1 stop10h 31mMultiple Airlines
Deal found 9/13$158
This Frontier deal was found by Cheapflights users on 9/13. 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 10/212:22 pmBOI - DEN
Nonstop2h 23mFrontier
Sun 10/59:38 amDEN - BOI
Nonstop1h 59mFrontier
Deal found 9/13$159
This Frontier deal was found by Cheapflights users on 9/14. 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 10/3012:03 pmGEG - DEN
Nonstop2h 16mFrontier
Sun 11/29:48 amDEN - GEG
Nonstop2h 20mFrontier
Deal found 9/14$160

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Colorado 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 September 15, 2025.
Use the filters below to find and compare flights from Idaho to Colorado that are best for you.

Fly from

Idaho

Fly to

Colorado

Route

Depart

Return

Price

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Tue 3/3

1:40 pm-7:19 pm

1 stop4h 39m

Denver Intl

Wed 3/4

7:50 pm-12:14 am

1 stop5h 24m

$148

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Sun 11/16

5:00 am-7:00 am

Nonstop2h 00m

Denver Intl

Mon 11/17

8:10 am-10:15 am

Nonstop2h 05m

$163

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Tue 10/28

9:59 am-7:06 pm

2 stops9h 07m

Denver Intl

Tue 11/4

7:00 am-12:36 pm

1 stop5h 36m

$176

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Thu 10/9

7:00 am-8:51 am

Nonstop1h 51m

Denver Intl

Sun 10/12

7:07 pm-8:52 pm

Nonstop1h 45m

$189

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Sat 10/11

10:50 am-12:39 pm

Nonstop1h 49m

Denver Intl

Wed 10/15

8:00 am-9:48 am

Nonstop1h 48m

$189

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Fri 11/14

1:50 pm-6:55 pm

1 stop5h 05m

Denver Intl

Mon 11/17

6:05 am-1:09 pm

1 stop7h 04m

$197

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 10/23

4:46 pm-11:14 pm

1 stop6h 28m

Denver Intl

Mon 10/27

6:25 am-1:20 pm

1 stop6h 55m

$197

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Fri 11/7

4:00 pm-11:49 pm

1 stop7h 49m

Denver Intl

Sun 11/9

6:05 am-1:09 pm

1 stop7h 04m

$197

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Wed 11/12

6:28 am-12:27 pm

1 stop5h 59m

Denver Intl

Sat 12/6

3:42 pm-11:50 pm

1 stop8h 08m

$198

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 10/16

6:00 am-9:29 am

1 stop3h 29m

Denver Intl

Sat 10/18

6:25 am-1:20 pm

1 stop6h 55m

$204

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to Colorado

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

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

Currently, October is the cheapest month in which you can book a flight from Idaho to Colorado (average of $197). Flying from Idaho to Colorado in March is currently the most expensive (average of $278). 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 ID to CO?

Find hourly flight availability from Idaho to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

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

Weekly flight availability from Idaho to Colorado

Explore weekly flight availability from Idaho to Colorado. 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 September 15, 2025.

The most flights from USID to USCO are scheduled on a Friday (18 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (6 on average).

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated September 15, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Idaho to Colorado have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,245 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Boarding

8.1

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
4,245 reviews
Southwest
8.0
Very good
4,245 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Boarding

8.1

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
8.0
Very good
7,954 reviews
Southwest
8.0
Very good
4,245 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Boarding

8.1

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
8,929 reviews
Southwest
8.0
Very good
4,245 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Boarding

8.1

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
699 reviews
Southwest
8.0
Very good
4,245 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Boarding

8.1

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
3,173 reviews
Southwest
8.0
Very good
4,245 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Boarding

8.1

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 Idaho to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Idaho to Colorado flight route?

    Flights from Idaho to Colorado have been viewed 100 times in the past calendar month.

  • How long is the flight from Idaho to Colorado?

    A quick flight from Idaho to Colorado can take about 2h. Hawaiian Airlines provides one of the quickest options available for as low as $163. The distance between Idaho and Colorado 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 Idaho to Colorado one-way?

    The cheapest airlines for a one-way flight from Idaho to Colorado are Frontier ($46), Delta ($69), and Southwest ($74).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho to Colorado 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 Idaho to Colorado?

    Currently, October is the cheapest month in which you can book a flight from Idaho to Colorado (average of $197). Flying from Idaho to Colorado in March is currently the most expensive (average of $278). 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

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Alternative routes for Idaho to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Idaho to Colorado

Discover the top 6 airlines that operate flights from Idaho to Colorado. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$54Average$88FlexibilityNo cancel feeOn-time88%
FrontierCheapest$62Average$137FlexibilityNo cancel feeOn-time62%
DeltaCheapest$136Average$370FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$154Average$407FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$189Average$419FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$196Average$330FlexibilityNo cancel feeOn-time63%

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