$76 Find Cheap Flights from Denver to Idaho - Compare and Save

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 7/7. 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, 0 bags

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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Flight Deals

Cheap Flights from Denver to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boisenonstop$168
Idaho Falls
Idaho Fallsnonstop$249
Hailey
Hailey1 stop$389
Lewiston
Lewiston1 stop$396
Twin Falls
Twin Falls1 stop$252
Pocatello
Pocatello1 stop$417
Spokane
Spokane1 stop$249
Boise
Boisenonstop$168
Idaho Falls
Idaho Fallsnonstop$249
Hailey
Hailey1 stop$389
Lewiston
Lewiston1 stop$396
Twin Falls
Twin Falls1 stop$252
Pocatello
Pocatello1 stop$417
Spokane
Spokane1 stop$249

Book Cheap Denver to Idaho Plane Tickets

 
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

Tue, Jul 14 - Tue, Jul 21
Frontier Logo
10:29 am - 12:29 pm
DEN
-
BOI
2h 00mnonstop
Frontier Logo
1:24 pm - 3:30 pm
BOI
-
DEN
2h 06mnonstop
$168Frontier
Tue, Jul 21 - Tue, Jul 28
Frontier Logo
10:29 am - 12:29 pm
DEN
-
BOI
2h 00mnonstop
Frontier Logo
1:24 pm - 3:30 pm
BOI
-
DEN
2h 06mnonstop
$170Frontier
Wed, Aug 5 - Tue, Aug 11
Multiple Airlines Logo
6:02 am - 12:47 pm
DEN
-
BOI
6h 45m
1 stop
Multiple Airlines Logo
1:24 pm - 3:30 pm
BOI
-
DEN
2h 06mnonstop
$201Multiple Airlines
Thu, Oct 1 - Sun, Oct 4
United Airlines Logo
8:05 am - 9:53 am
DEN
-
IDA
1h 48mnonstop
United Airlines Logo
4:05 pm - 5:59 pm
IDA
-
DEN
1h 54mnonstop
$249United Airlines
Wed, Aug 26 - Sun, Aug 30
Multiple Airlines Logo
10:49 pm - 9:22 am
DEN
-
GEG
11h 33m
1 stop
Multiple Airlines Logo
10:12 am - 3:48 am
GEG
-
DEN
16h 36m
1 stop
$249Multiple Airlines
Thu, Sep 10 - Fri, Sep 18
United Airlines Logo
1:39 pm - 3:23 pm
DEN
-
IDA
1h 44mnonstop
United Airlines Logo
5:53 pm - 7:45 pm
IDA
-
DEN
1h 52mnonstop
$258United Airlines
Wed, Aug 5 - Sat, Aug 8
Delta Logo
6:28 pm - 10:32 pm
DEN
-
IDA
4h 04m
1 stop
Delta Logo
6:00 am - 9:14 am
IDA
-
DEN
3h 14m
1 stop
$269Delta
Sat, Aug 8 - Tue, Aug 18
Alaska Airlines Logo
11:32 am - 11:07 pm
DEN
-
GEG
12h 35m
1 stop
Alaska Airlines Logo
8:15 am - 7:18 pm
GEG
-
DEN
10h 03m
1 stop
$285Alaska Airlines
Tue, Aug 18 - Wed, Aug 26
Alaska Airlines Logo
8:40 am - 12:29 pm
DEN
-
GEG
4h 49m
1 stop
Alaska Airlines Logo
7:03 am - 9:13 pm
GEG
-
DEN
13h 10m
1 stop
$297Alaska Airlines
Wed, Oct 14 - Wed, Oct 21
Delta Logo
5:40 am - 11:46 am
DEN
-
LWS
7h 06m
1 stop
Delta Logo
6:25 am - 12:17 pm
LWS
-
DEN
4h 52m
1 stop
$396Delta
Booking Insights

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.

How much is a round-trip flight from Denver to Idaho?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Denver to Idaho departing in July.

What is the cheapest Denver to Idaho flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Idaho from Denver found in the last 5 days was to Boise, at $161 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 5 days was $161.

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

The average price for all round-trip flights from Denver to Idaho depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Idaho is generally in the morning, when round-trip flights cost $227 on average. Morning departures are around 33% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $355.

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $380 on average.

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 December, when tickets cost $25 (return) on average. On the other hand, the most expensive months are April and June, when the average cost of round-trip tickets is $114 and $113 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 Thursday 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 Mondays.

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 2 weeks before departure, which saves you about 33% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$76
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from Denver to Boise

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.

Reviews of the 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.
7.9
SouthwestOverall score based on 4243 reviews
8.6Crew
7.0Food
7.5Entertainment
8.1Boarding
8.0Comfort
Airline reviews

Over a 3 hour flight. The turbulence was almost imperceptible except for 2 short periods which were not bad and over quickly. The attendants claimed "Safety first" and sat looking at their phones for 3 hours with no drink or snack service. This isn't the first time with Southwest. I thinkit may be there new plan of operation. Oh, and it was June 18, Southwest's Birthday which offered free drinks. NOT.

4.0 OkayJeff, Jun 2026
MCI - FLL
Read more Southwest reviews

Over a 3 hour flight. The turbulence was almost imperceptible except for 2 short periods which were not bad and over quickly. The attendants claimed "Safety first" and sat looking at their phones for 3 hours with no drink or snack service. This isn't the first time with Southwest. I thinkit may be there new plan of operation. Oh, and it was June 18, Southwest's Birthday which offered free drinks. NOT.

Flight was delayed, full flight and I had to change gates. Southwest flights are always late later in the day.

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

It was great. The gate staff were very helpful in Portland when my son forgot his rolling bag and had to go back to get it just in time to make it on the plane. We really appreciate that. Great job!

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

Kayak could’ve posted the correct gate number. Almost missed my flight.

Slow boarding, limited food and drink portions. Bad delays and turbulence

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

Third flight in two months where the crew was not there. Comfort seating does not guarantee overhead bin space. Passengers with children are allowed on the plane first - if you are flying to and from Orlando, this means half the plane has boarded before you get on. And somehow all the bin space is taken up. 3 out of 5 flights have had issues with equipment or procedure. Some of these instances caused the flight to be delayed because of a "nuisance" light. One time it was a bag that had been brought on board but did not belong to anyone so we had to return to the gate. Last night we were told the "AC" on the plane doesn't work well and we're 10th for take off- because the crew was late - and that it will get cool when we're in the air. Not sure if this is usual, but I didn't think flight crew could jump seat in first class. Movie and TV selection has not been refreshed for several months- flying one to two round trips each month easily exhausts the list of content.

Great experience nice pilot very soft and easy landing and take off

We sat on the runway for over an hour before departure. That was unwelcome.

Horrible. Faucet in sink not working, wifi not working. Didn’t bring food or snacks

Flight was delayed before take off and at landing. Baggage took 20 minutes. Flight crew would not serve full soft drink and had to ask multiple times before receiving water.

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Very easy ! Use the kiosk and bag drop and right to security within 10 min

This planes staff was top tier. Everything went great and had a great flight home.

Destroyed my suitcase. Tired of talking about it. Cancelling my unite mileage plus account.

New plane was lovely. Crew customer service is always lax but expected. Kraft on time and arrived safely.

It was a short flight so I was expecting too much

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Really hard landing... as in slammed into the runway then hit the brakes really hard ...

Every staff member was professional, friendly and courteous. The pizza twist was ok. It was warm but too much dough.

Seats were very uncomfortable and being charged for snacks and water.........

Allegiant actually impressed me, original inbound flight from PBG was so late they gave us a bird inbound from Des Moines and only left 1h late and gained 40 minutes back in the air. Comfortable flight with no frills but no complaints.

Flight was delayed. Crew was good but hot coffee was not available.

Great. No choice for n/a. No food or entertainment options

No food is available without purchasing it and there is no in-flight entertainment. Both of these are OK because we got an inexpensive flight from Allegiant and, otherwise, our experience was excellent.

just had water and there was plenty of leg & seat room. But then i don't weight 220#s!!

Not totally their fault- screaming kids that had zero parent intervention.

It was cold on the flight. The crew was very pleasant. I didn't order any food. We were delayed due to Captain waiting on maintenance log. He kept us informed though. The flight itself was smooth. I would definitely fly with Allegiant again!

I had a fantastic experience with Allegiant. I had wheelchair assistance and they helped me find my luggage and brought me to my car. Even loaded my luggage. Wonderful service!! Thank you Allegiant!

Superb. Staff great. Great flight. As with other airlines, seating too tight and restrictive.

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

The staff at the check in counter was so rude. Made you feel Incompetent

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

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

Information on your arrival and departure airports