$42 Find Cheap Flights from Denver to Idaho

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Idaho departing on 8/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Idaho, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Idaho, as well as popular online travel agencies
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Flights Deals

Best Idaho Flight Deals from Denver

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boisenonstop$149
Idaho Falls
Idaho Fallsnonstop$84
Hailey
Haileynonstop$209
Lewiston
Lewiston1 stop$426
Twin Falls
Twin Falls1 stop$406
Pocatello
Pocatello1 stop$427
Spokane
Spokanenonstop$139
Boise
Boisenonstop$149
Idaho Falls
Idaho Fallsnonstop$84
Hailey
Haileynonstop$209
Lewiston
Lewiston1 stop$426
Twin Falls
Twin Falls1 stop$406
Pocatello
Pocatello1 stop$427
Spokane
Spokanenonstop$139

Cheap Flights from Denver to Idaho

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Idaho that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Idaho

Sun, Jul 6 - Sun, Jul 13
Allegiant Air Logo
3:20 pm - 5:04 pmDEN-IDA
1h 44mnonstop
Allegiant Air Logo
5:49 pm - 7:37 pmIDA-DEN
1h 48mnonstop
$84Allegiant Air
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Thu, Jul 17 - Thu, Jul 24
Allegiant Air Logo
3:20 pm - 5:04 pmDEN-IDA
1h 44mnonstop
Allegiant Air Logo
5:49 pm - 7:37 pmIDA-DEN
1h 48mnonstop
$88Allegiant Air
Find Deal
Sun, Jul 20 - Thu, Jul 24
Frontier Logo
9:42 am - 11:03 amDEN-GEG
2h 21mnonstop
Frontier Logo
11:58 am - 3:17 pmGEG-DEN
2h 19mnonstop
$139Frontier
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Thu, Oct 2 - Sun, Oct 5
Frontier Logo
9:48 am - 11:43 amDEN-BOI
1h 55mnonstop
Frontier Logo
12:53 pm - 2:53 pmBOI-DEN
2h 00mnonstop
$149Frontier
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Tue, Jul 29 - Wed, Aug 6
Delta Logo
5:30 am - 8:53 amDEN-GEG
4h 23m1 stop
Delta Logo
5:10 pm - 10:11 pmGEG-DEN
4h 01m1 stop
$177Delta
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Tue, Jul 8 - Tue, Jul 15
United Airlines Logo
9:05 pm - 10:51 pmDEN-IDA
1h 46mnonstop
United Airlines Logo
6:03 pm - 7:45 pmIDA-DEN
1h 42mnonstop
$189United Airlines
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Tue, Jul 8 - Tue, Jul 15
Delta Logo
6:50 am - 12:33 pmDEN-GEG
6h 43m1 stop
Delta Logo
1:15 pm - 9:44 pmGEG-DEN
7h 29m1 stop
$197Delta
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Fri, Jul 11 - Sun, Jul 20
United Airlines Logo
7:00 pm - 9:02 pmDEN-SUN
2h 02mnonstop
United Airlines Logo
7:00 am - 9:08 amSUN-DEN
2h 08mnonstop
$209United Airlines
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Tue, Aug 5 - Tue, Aug 12
Southwest Logo
8:30 am - 3:10 pmDEN-BOI
6h 40m1 stop
Southwest Logo
1:15 pm - 3:10 pmBOI-DEN
1h 55mnonstop
$221Southwest
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Tue, Jul 29 - Mon, Aug 4
Southwest Logo
3:25 pm - 5:20 pmDEN-BOI
1h 55mnonstop
Southwest Logo
5:25 pm - 7:25 pmBOI-DEN
2h 00mnonstop
$222Southwest
Find Deal
Useful Info

KAYAK's insights & trends for Denver to Idaho flights

Get data-powered insights and trends into flights from Denver to Idaho to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Denver to Idaho flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Denver to Idaho.

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

Can I save money by flying with a layover from Denver to Idaho?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $293, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Denver to Idaho?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Idaho, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Idaho is May, when tickets cost $252 (return) on average. On the other hand, the most expensive months are December and November, when the average cost of round-trip tickets is $444 and $368 respectively.

What’s the cheapest day of the week to fly from Denver to Idaho?

The average price of all round-trip flights from Denver to Idaho clicked on KAYAK for each day over the last 12 months.

When flying from Denver to Idaho, you should consider leaving on a Sunday and avoid Mondays if you are looking for the best rates. For your return to Denver, you’ll find the best rates on Thursdays and the most expensive ones on Sundays.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Idaho, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Denver 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.


Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$42
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Denver to Idaho Falls

FAQs - booking Idaho flights

  • How does KAYAK find such low prices on flights from Denver 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 Denver to Idaho.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Denver 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 Denver 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 Denver 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 Denver 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 Denver to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • 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.

Top 5 airlines serving from Denver to Idaho

 
See real verified KAYAK customer reviews for airlines flying from Denver to Idaho. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver 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
8.2Boarding
7.1Food
8.6Crew
8.0Comfort
7.6Entertainment
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, 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

Had a hard time finding my assigned seat. No attendants to assist.

The negative was the wait at the airport coming back. I checked my bags in, an hour before boarding and I get the notification that my flight was delayed. Rather had gotten the notification while I was at the hotel. Then it was delayed 3 x’s. Ugh!

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.

Everything you need to know for your flight from Denver to Idaho

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