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Idaho

$46+ 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 6/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap flight deals from Colorado to Idaho

Keep the following information in mind while searching for Colorado to Idaho flight deals. Data was last updated junio 12, 2025.

Round-trip from

$84
(Booking.com)

One-way from

$46
(Booking.com)

Popular in

December

Cheapest in

May

Average price

$295

Good round-trip deal

$91 or less

Good one-way deal

$42 or less
From Colorado to Idaho
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One-way flight from Colorado to Idaho
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Highest demand for flights based on searches. 18% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Colorado to Idaho.
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Price to beat on a one-way flight from Colorado to Idaho.
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Find flight deals from Colorado to Idaho

Cheapest flights from Colorado to Idaho
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 junio 12, 2025.

This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 7/63:20 pmDEN - IDA
Nonstop1h 44mAllegiant Air
dom. 7/135:49 pmIDA - DEN
Nonstop1h 48mAllegiant Air
Deal found 6/11$84
This Frontier deal was found by Cheapflights users on 6/11. 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.
dom. 7/209:42 amDEN - GEG
Nonstop2h 21mFrontier
jue. 7/2411:58 amGEG - DEN
Nonstop2h 19mFrontier
Deal found 6/11$139
This Frontier deal was found by Cheapflights users on 6/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/29:48 amDEN - BOI
Nonstop1h 55mFrontier
dom. 10/512:53 pmBOI - DEN
Nonstop2h 00mFrontier
Deal found 6/12$149
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/186:25 amCOS - BOI
1 stop4h 30mSouthwest
lun. 8/254:30 pmBOI - COS
1 stop6h 05mSouthwest
Deal found 6/11$177
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/295:30 amDEN - GEG
1 stop4h 23mDelta
mié. 8/65:10 pmGEG - DEN
1 stop4h 01mDelta
Deal found 6/11$177
This United Airlines deal was found by Cheapflights users on 6/10. 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.
mar. 7/89:05 pmDEN - IDA
Nonstop1h 46mUnited Airlines
mar. 7/156:03 pmIDA - DEN
Nonstop1h 42mUnited Airlines
Deal found 6/10$189
This Agoda.com deal was found by Cheapflights users on 6/12. 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 Agoda.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/211:40 amDEN - BOI
1 stop5h 10mHawaiian Airlines
lun. 10/67:21 amBOI - DEN
1 stop6h 39mHawaiian Airlines
Deal found 6/12$191
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/13:55 pmDEN - JAC
1 stop5h 03mDelta
vie. 7/47:09 amJAC - DEN
1 stop8h 25mDelta
Deal found 6/10$209
This United Airlines deal was found by Cheapflights users on 6/11. 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.
vie. 7/117:00 pmDEN - SUN
Nonstop2h 02mUnited Airlines
dom. 7/207:00 amSUN - DEN
Nonstop2h 08mUnited Airlines
Deal found 6/11$209
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/97:10 amDEN - IDA
1 stop3h 24mDelta
mié. 7/166:52 pmIDA - DEN
1 stop3h 19mDelta
Deal found 6/9$209
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/306:17 pmDEN - BOI
1 stop5h 42mAlaska Airlines
mar. 10/77:21 amBOI - DEN
1 stop6h 39mAlaska Airlines
Deal found 6/11$210
This United Airlines deal was found by Cheapflights users on 6/10. 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.
jue. 10/27:45 amDEN - BOI
Nonstop1h 57mUnited Airlines
lun. 10/67:00 amBOI - DEN
Nonstop1h 55mUnited Airlines
Deal found 6/10$211

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 junio 12, 2025.
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

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

dom. 7/6

3:20 pm-5:04 pm

Nonstop1h 44m

Idaho Falls Fanning Field

dom. 7/13

5:49 pm-7:37 pm

Nonstop1h 48m

$84

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

dom. 7/20

9:42 am-11:03 am

Nonstop2h 21m

Spokane

jue. 7/24

11:58 am-3:17 pm

Nonstop2h 19m

$139

DenverBoise

DEN - BOI

DENBOI

Denver Intl

jue. 9/4

9:48 am-11:43 am

Nonstop1h 55m

Boise Air Term. Gowen Fld

jue. 9/11

12:53 pm-2:53 pm

Nonstop2h 00m

$149

Colorado SpringsBoise

COS - BOI

COSBOI

Colorado Springs

lun. 8/18

6:25 am-10:55 am

1 stop4h 30m

Boise Air Term. Gowen Fld

lun. 8/25

4:30 pm-10:35 pm

1 stop6h 05m

$177

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

mar. 7/29

5:30 am-8:53 am

1 stop4h 23m

Spokane

mié. 8/6

5:10 pm-10:11 pm

1 stop4h 01m

$177

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

mar. 7/8

9:05 pm-10:51 pm

Nonstop1h 46m

Idaho Falls Fanning Field

mar. 7/15

6:03 pm-7:45 pm

Nonstop1h 42m

$189

DenverJackson

DEN - JAC

DENJAC

Denver Intl

mar. 7/1

3:55 pm-8:58 pm

1 stop5h 03m

Jackson Hole

vie. 7/4

7:09 am-3:34 pm

1 stop8h 25m

$209

DenverHailey

DEN - SUN

DENSUN

Denver Intl

vie. 7/11

7:00 pm-9:02 pm

Nonstop2h 02m

Hailey Sun Valley-Friedman

dom. 7/20

7:00 am-9:08 am

Nonstop2h 08m

$209

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

mié. 7/9

7:10 am-10:34 am

1 stop3h 24m

Idaho Falls Fanning Field

mié. 7/16

6:52 pm-10:11 pm

1 stop3h 19m

$209

DenverBoise

DEN - BOI

DENBOI

Denver Intl

mié. 9/3

11:40 am-4:50 pm

1 stop5h 10m

Boise Air Term. Gowen Fld

lun. 9/15

4:34 pm-9:47 pm

1 stop5h 13m

$210

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 60 results
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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, October is the cheapest month in which you can book a flight from Colorado to Idaho (average of $314). Flying from Colorado to Idaho in June is currently the most expensive (average of $395). 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 junio 12, 2025.

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

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 junio 12, 2025.

The most flights from USCO to USID are scheduled on a Monday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Idaho by month

Plan your trip to Idaho by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

Plan your trip to Idaho by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Idaho, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

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 junio 12, 2025.
To help decide which airline to fly from Colorado to Idaho, see what other customers have to say about Alaska Airlines, Southwest and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • How popular is this Colorado to Idaho flight route?

    This flight path from Colorado to Idaho was viewed by 2 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    To fly one-way, consider booking your trip with Allegiant Air, which is currently one of the cheapest options available, starting at $46. Frontier flights start at $79 while deals on Hawaiian Airlines start at $88 one-way.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Colorado to Idaho (average of $314). Flying from Colorado to Idaho in June is currently the most expensive (average of $395). 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 Colorado to Idaho

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

Discover the top 6 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$42Average$89FlexibilityNo cancel feeOn-time88%
FrontierCheapest$59Average$128FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$400FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$168Average$235FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$189Average$396FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$377FlexibilityNo cancel feeOn-time63%

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