$42 Find Cheap Flights from Colorado to Idaho

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Low seasonApril
High seasonJuly
Cheapest flight$42
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Denver to Idaho Falls

FAQs for booking flights from Colorado to Idaho

  • How does KAYAK find such low prices on flights from Colorado to Idaho?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Colorado to Idaho.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Colorado to Idaho?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Colorado to Idaho is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Colorado to Idaho?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Colorado to Idaho with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Colorado to Idaho?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Colorado to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in Idaho?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Idaho is Boise Air Term. Gowen Fld Airport (BOI), with an average flight price of $157.

  • What is the cheapest day to fly to Idaho?

    Based on KAYAK data, the cheapest day to fly to Idaho is Sunday where round-trip tickets can be as cheap as $247. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $328 on average.

  • What is the cheapest time of day to fly to Idaho?

    The cheapest time of day to fly to Idaho is generally in the morning, when round-trip flights cost $286 on average. Morning departures are around 11% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally in the evening, which is peak travel time and where the average cost of a ticket is $323.

  • What is the cheapest flight to Idaho?

    The cheapest ticket to Idaho from Colorado found in the last 72 hours was to Boise, at $59 round-trip. The most popular route is Denver (DEN) to Boise (BOI) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $59.

  • What is the cheapest month to fly from Colorado to Idaho?

    The cheapest month for flights from Colorado to Idaho is January, when tickets cost $288 (return) on average. On the other hand, the most expensive months are August and October, when the average cost of round-trip tickets is $438 and $428 respectively.

  • How far in advance should I book a flight from Colorado to Idaho?

    To get a below average price on the flight from Colorado to Idaho, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

  • How long is the flight to Idaho?

    An average nonstop flight from Colorado to Idaho takes 6h 22m, covering a distance of 605 miles. The shortest route is Denver (DEN) to Jackson (JAC) with an average flight time of 1h 27m.

  • What are the most popular destinations in Idaho?

    Based on KAYAK flight searches, the most popular destination is Spokane (40% of total searches to Idaho). The next most popular destinations are Boise (33%) and Jackson (11%). Searches for flights to Idaho Falls (7%), to Hailey (4%) and to West Yellowstone (3%) are also popular.

Top 5 airlines serving from Colorado to Idaho

 
Need help choosing which airline to fly with from Colorado to Idaho? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4287 reviews
7.1Food
8.2Boarding
8.0Comfort
7.6Entertainment
8.6Crew
Airline reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

6.0 GoodDavid, Jun 2025BWI - COS
Read more Southwest reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

We sat on the plane on the tarmac for 4 hours.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

Staff was far less than helpful at all times. Departure and arrival times mean nothing to Southwest. Extremely disappointed, will never fly with them again, and I’ll be sure to share my experience with all.

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

The check in and bag drop off for Sky Priority members is slow. The Clear security was also slow - a TSA issue.

I am still upset that my bag was lost on a recent trip to Rome ; we were inconvenienced and out €150 Euros ; delta has refused to reimburse us

I am very bothered by the events today. I can't believe the flight attendants allowed someone to take my seat and made me move. It was embarrassing. I was in the right. The lady just didn't want move. I can't believe delta would allow this to stand and disrespect my rights as a passenger. The lady complained about her leg and that she couldn't move. Firstly somehow she was able to make it to row 24. Not sure how much her leg could have hurt. Secondly, I'm in plenty of pain myself. I just finished chemotherapy a several weeks ago. My body is constantly sore. Yet deltas flight attendants didn't appropriately protect my rights. In the end they found me a seat on the plane but I want to understand how delta can operate this way. They in essence allowed a bully to get their way.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

No food service almost missed because of first flight delays

Tight! Seats are not designed for those of us who wear extra-large clothes.

The non-stop flight from Grand Rapids was excellent. I neither expected or needed a budget flight and Allegiant made the trip easy and for an affordable price, Arriving at the Mesa Airport (AZA) is a delight compared to the international airport. For our return flight, we were able to arrive 75 minutes before the flight, return the rental car, check our bag and make it to the gate in plenty of time. That would never happen at most airports.

Easiest flights I’ve ever taken. Plane was comfortable without overly crowded seating.

Terrible. Still have not received the refund from them. They sent it to some account that I don't even know. Spoke with costumer service and they are unable to help.

I didn’t like it at all. I miss my second flight because of the delay on Allegiant Air now I m stuck in MCO.

Good, but a bit late on take off after loading. Don't like charging for carry ons!

First time flying with them and will definitely fly again in the future. Crew was so nice and friendly, fought was seamless. They are simple planes, no entertainment, but it’s fine for a short flight or if you have personal devices Rates are competitive, and they did so well with keeping the flight on time after a tropical storm, where other airlines had delays and cancellations.

They boarded passengers that sat in the back of the plane first, making boarding very efficient.

I didn't even take this flight. My plans changed and I couldn't get ahold of customer service and the website kept breaking down during the attempt to change the flight. I wound up taking another airline entirely and eating the cost.

The worst flying experience ever 3 delays. No accommodations. Had to deboard the plane after being delayed.

I never got to experience the flight because they delayed my first flight and I missed this one. Then Frontier didn't want to help me rebook a flight to get me to my final destination.

The Boarding process in Denver was chaotic, and since the line was so long, we were lined up very far from the gate. If there were any announcements from the gate staff, we didn't hear them. The flight attendants were spectacular. The only negative part of the flight was sitting by a 2 1/2 year old who was unruly and unfortunately had parents that matched his behaviors. Also, the restaurants in Denver on the E concourse, they didn't have food (passengers could only order 1 item on the entire menu) or the restaurants had 12-14 people waiting for orders to be prepared and another 6 people waiting to order. If you have a layover in Denver and need to grab food, be prepared to visit the shops with pre-packaged sandwiches, or you can visit another concourse but it may take a while to transit throughout the airport.

Everything went as planned. Crew was great. Seats were still not that comfortable.

they delayed my flight which ended up, causing my layover flight to leave without me, resulting in me missing a flight and having to stay overnight in Houston international. I got no compensation other than a flight to my original location only a day later. i’ve never experienced such a unprofessional situation

The seats were extremely hard and uncomfortable, even for a budget airline.

Boarding was very well executed. Got my bag right away.

Overall experience good. There was no food and seats were not terribly comfortable.

There was nothing to like, flight delayed had to move to different departure areas, disorganized to say the leasr

There were a lot of issues every step of the process. Check in, security, boarding, and dealing with luggage. Plus the money you think you are saving you end up using in hidden fees.

The flight attendant was arguing with a passenger before takeoff. The passenger was frustrated but the flight attendant should have handled it with grace, but instead she was nasty and rude. The seats were comfortable and the flight was uneventful. I wish we didn’t have to pay for drinks or snacks but that’s what you get with a budget airline.

Book cheap flights from Colorado to Idaho

Recent round-trip flight deals

7/6Sun
nonstopAllegiant Air
1h 44mDEN-IDA
7/13Sun
nonstopAllegiant Air
1h 48mIDA-DEN
$84
7/17Thu
nonstopAllegiant Air
1h 44mDEN-IDA
7/24Thu
nonstopAllegiant Air
1h 48mIDA-DEN
$88
7/20Sun
nonstopFrontier
2h 21mDEN-GEG
7/24Thu
nonstopFrontier
2h 19mGEG-DEN
$139
10/2Thu
nonstopFrontier
1h 55mDEN-BOI
10/5Sun
nonstopFrontier
2h 00mBOI-DEN
$149
8/18Mon
1 stopSouthwest
4h 30mCOS-BOI
8/25Mon
1 stopSouthwest
6h 05mBOI-COS
$177
7/29Tue
1 stopDelta
4h 23mDEN-GEG
8/6Wed
1 stopDelta
4h 01mGEG-DEN
$177
8/18Mon
1 stopSouthwest
5h 30mCOS-BOI
8/25Mon
2 stopsSouthwest
9h 10mBOI-COS
$182
7/8Tue
nonstopUnited Airlines
1h 46mDEN-IDA
7/15Tue
nonstopUnited Airlines
1h 42mIDA-DEN
$189
7/8Tue
1 stopDelta
6h 43mDEN-GEG
7/15Tue
1 stopDelta
7h 29mGEG-DEN
$197
7/11Fri
nonstopUnited Airlines
2h 02mDEN-SUN
7/20Sun
nonstopUnited Airlines
2h 08mSUN-DEN
$209

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Recent one-way flight deals

8/31Sun
nonstopAllegiant Air
1h 42mDEN-IDA
$42
6/19Thu
nonstopAllegiant Air
1h 44mDEN-IDA
$46
8/10Sun
nonstopFrontier
2h 21mDEN-GEG
$79
7/15Tue
1 stopDelta
5h 51mDEN-GEG
$89
11/6Thu
nonstopFrontier
2h 20mDEN-GEG
$93
9/10Wed
nonstopSouthwest
1h 55mDEN-BOI
$106
8/7Thu
nonstopUnited Airlines
2h 23mDEN-GEG
$109
8/16Sat
nonstopSouthwest
1h 55mDEN-BOI
$116
7/12Sat
nonstopUnited Airlines
1h 59mDEN-BOI
$117
8/10Sun
1 stopDelta
4h 44mDEN-GEG
$119

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Last minute flights from Colorado to Idaho

Last minute flight, train and bus deals

6/17Tue
nonstopFrontier
2h 21mDEN-GEG
6/24Tue
nonstopFrontier
2h 21mGEG-DEN
$213
6/15Sun
nonstopFrontier
2h 21mDEN-GEG
6/17Tue
nonstopFrontier
2h 21mGEG-DEN
$218
6/17Tue
multi-stopDelta
5h 26mDEN-GEG
6/24Tue
multi-stopDelta
4h 15mGEG-DEN
$287
6/17Tue
nonstopSouthwest
2h 20mDEN-GEG
6/19Thu
nonstopSouthwest
2h 10mGEG-DEN
$312
6/17Tue
multi-stopSouthwest
5h 35mDEN-GEG
6/19Thu
nonstopSouthwest
2h 10mGEG-DEN
$321
6/13Fri
nonstopUnited Airlines
1h 30mDEN-JAC
6/15Sun
nonstopUnited Airlines
1h 38mJAC-DEN
$359
6/13Fri
nonstopUnited Airlines
1h 45mDEN-IDA
6/16Mon
nonstopUnited Airlines
1h 55mIDA-DEN
$359
6/13Fri
multi-stopDelta
4h 32mDEN-IDA
6/15Sun
multi-stopDelta
3h 23mIDA-DEN
$379
6/17Tue
multi-stopAlaska Airlines
12h 24mDEN-GEG
6/24Tue
multi-stopAlaska Airlines
4h 52mGEG-DEN
$447
6/17Tue
multi-stopAlaska Airlines
5h 55mDEN-BOI
6/21Sat
multi-stopAlaska Airlines
8h 00mBOI-DEN
$484

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Everything you need to know for your flight to Idaho

Cabin class types available on flights to Colorado

Cabin classes available on flights to Colorado. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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