$79 Find Cheap Flights from Ontario 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 Ontario to Idaho departing on 4/8. 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 Ontario 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 Ontario to Idaho, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Ontario to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boisenonstop$137
Idaho Falls
Idaho Falls1 stop$257
Hailey
Hailey2 stops$278
Lewiston
Lewiston1 stop$294
Twin Falls
Twin Falls1 stop$532
Pocatello
Pocatello1 stop$417
Spokane
Spokane1 stop$180
Boise
Boisenonstop$137
Idaho Falls
Idaho Falls1 stop$257
Hailey
Hailey2 stops$278
Lewiston
Lewiston1 stop$294
Twin Falls
Twin Falls1 stop$532
Pocatello
Pocatello1 stop$417
Spokane
Spokane1 stop$180

Book Cheap Ontario 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 Ontario 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 Ontario to Idaho

Wed, Apr 15 - Sat, Apr 18
Alaska Airlines Logo
6:25 pm - 9:26 pm
ONT
-
BOI
2h 01mnonstop
Alaska Airlines Logo
4:40 pm - 5:45 pm
BOI
-
ONT
2h 05mnonstop
$137Alaska Airlines
Wed, Apr 8 - Tue, Apr 14
Southwest Logo
3:45 pm - 11:20 pm
ONT
-
BOI
6h 35m
1 stop
Southwest Logo
4:05 pm - 9:30 pm
BOI
-
ONT
6h 25m
1 stop
$157Southwest
Wed, Apr 8 - Tue, Apr 14
Southwest Logo
3:45 pm - 11:20 pm
ONT
-
BOI
6h 35m
1 stop
Southwest Logo
6:40 am - 11:35 am
BOI
-
ONT
5h 55m
2 stops
$162Southwest
Fri, May 1 - Wed, May 6
Alaska Airlines Logo
2:59 pm - 5:59 pm
ONT
-
BOI
2h 00mnonstop
Alaska Airlines Logo
1:15 pm - 2:19 pm
BOI
-
ONT
2h 04mnonstop
$167Alaska Airlines
Wed, Apr 15 - Sun, Apr 19
Frontier Logo
12:59 am - 10:49 am
ONT
-
GEG
9h 50m
1 stop
Frontier Logo
11:44 am - 7:31 am
GEG
-
ONT
19h 47m
1 stop
$180Frontier
Wed, Apr 15 - Sun, Apr 19
Frontier Logo
12:59 am - 11:08 am
ONT
-
BOI
9h 09m
1 stop
Frontier Logo
11:53 am - 7:31 am
BOI
-
ONT
20h 38m
1 stop
$180Frontier
Fri, Apr 17 - Tue, Apr 21
Delta Logo
7:00 am - 9:42 pm
ONT
-
SUN
13h 42m
2 stops
Delta Logo
12:42 pm - 10:37 pm
SUN
-
ONT
10h 55m
2 stops
$278Delta
Wed, Apr 15 - Sat, Apr 25
Delta Logo
6:00 am - 12:01 pm
ONT
-
SUN
5h 01m
1 stop
Delta Logo
7:15 am - 12:14 pm
SUN
-
ONT
5h 59m
1 stop
$285Delta
Fri, Jun 5 - Sun, Jun 7
United Airlines Logo
1:50 pm - 9:51 pm
ONT
-
SUN
7h 01m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
SUN
-
ONT
5h 12m
1 stop
$295United Airlines
Sat, Jul 18 - Thu, Jul 23
United Airlines Logo
1:50 pm - 10:00 pm
ONT
-
JAC
7h 10m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
JAC
-
ONT
5h 12m
1 stop
$399United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Idaho flights

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

What is the cheapest Ontario to Idaho flight route?

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

The cheapest ticket to Idaho from Ontario found in the last 72 hours was to Boise, at $137 round-trip. The most popular route is from Ontario (ONT) to Boise (BOI), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $137.

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

The average price for all round-trip flights from Ontario 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 afternoon, when round-trip flights cost $137 on average. Morning departures are around 100% 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 $227.

Can I save money by flying with a layover from Ontario 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 $257, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario 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 Ontario to Idaho is January, when tickets cost $177 (return) on average. On the other hand, the most expensive months are November and December, when the average cost of round-trip tickets is $402 and $399 respectively.

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

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

For Ontario to Idaho, Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Idaho back to Ontario, the best deals are generally found on Saturday, with Sunday being the most expensive.

How far in advance should I book a flight from Ontario 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 Ontario 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 Ontario to Idaho, you should book around 4 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$79
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Ontario to Boise

FAQs - booking Idaho flights

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario 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 Ontario 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 Ontario 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 Ontario 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 Ontario 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 Ontario to Idaho

 
See real verified KAYAK customer reviews for airlines flying from Ontario 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 Ontario 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 4324 reviews
8.6Crew
8.0Comfort
7.5Entertainment
7.0Food
8.1Boarding
Airline reviews

Boarding was easy. The seats are small and fairly uncomfortable

8.0 ExcellentNicole, Mar 2026
LGB - OAK
Read more Southwest reviews

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

The charges were ridiculous for an hour flight and the turbulence was very scary.

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

Great flight but super high price. Glad it was a business trip and not personal

3 hour delay. Had to change plans and was still delayed.

I have been flying commercial for decades. I was in one of the ladder boarding groups, had my bag tagged because they thought there was not going to be enough space for it in the overhead bins. I politely asked one of the attendance if I could try to find a space- she said I could and I did. I then took the bag tag off and gave it to one of the other attendants as I was told to do by the first one. He, in a curt, anal, and disrespectful manner, told me that I needed to take my bag down from the overhead bin and check it. This was a situation I’ve never encountered before. The attendant’s attitude was confrontational and belittling in front of other onlooking passengers as if daring me to challenge him. I am a physician who takes care of patients day in and day out. Not wanting to make a scene, I calmly told him, “do what you need to do.” he took my bag down from the overhead bin, put the back tag back on it, and checked it only to make room for another bag that was also supposed to be technically checked by a following passenger. The same male attendant later came up to me and said “you shouldn’t have showed me the bag tag,” as if conveying that he was just following protocol was a justification for treating me like a kid out of line. I cared about this because it took 15 minutes from my life to then retrieve the bag at baggage claim and it also felt like really poor customer service. I understand the need for protocols. This is also a service industry, and we the passengers are the clients. We should be made to feel welcome and respected and our life in transit made as easy as it can be within reason. This attendant clearly needs to be reminded of that. Of note, an older female fellow passenger sitting next to me agreed with this assessment.

Ended up sitting in front of a child who kicked the back of the seat and screamed for most of the flight.

After landing in Seattle, 3 hours waiting to find parking space do to driving problems. Very uncomfortable.

My only complaint was how far it was from plane to baggage claim

I had a problem with my reservation and no one could help me understand what happened. I booked my flight months ago and received a confirmation email. In the confirmation email, it said that the flight would depart at 3:15 p.m. A few hours before the flight, I tried to go online and check in, and suddenly it said that the flight was leaving an hour earlier. I had to rush to get to the airport and almost didn't make it. No one could help me understand why this happened, and I'm really concerned that it might happen in the future. I would appreciate some support in this matter.

They cancelled the flight and provided no support to find another way home or how to get a refund. Links provided didn’t work and phone wait times were over eight hours. Battery on my phone couldn’t last long enough.

It was a super old plane so the first class experience was just not luxurious

signage from the upper area to the tram down 2 escalator!

You sent me an email saying boarding was at 9:29 and AA sent one that was 8:29 on Sunday morning. I had to call AA to get that it was indeed 8:29.

Not bad. Due to not buying a seat, on the way back, my seat was not assigned till 2 hrs before the flight left. Got me worried I wouldn’t have a seat.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

OK, we were delayed and had to de plane and reboard.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

it was a very short flight so my expectations were low.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Not good. One of my luggage is missing. And until now they can’t find it

My 9:50AM flight was delayed to 3:40PM "due to incoming aircraft delay". No aircraft is "delayed" that long. Found out once we did board (after several changes in times) that the aircraft had a maintenance issue and we had to wait for another aircraft. Just tell us that. The aircraft we did get was old and the seats need to be updated. I have been traveling for several weeks with AA and you should refresh your entertainment content as frequent flyers have gone through most of your new content. I have Celiac and a shellfish allergy and continue to have struggles with meals on business and first class flights. Please keep this in mind. Sorry - was a long travel day yesterday and a bit cranky this morning with my experience comments. Still an AA fan.

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

My seat was assigned last row behind restrooms No legroom’s I’m very Pettit Still was not comfortable Food choice was excellent

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

Mediocre would be best description. Food bland. Seat biz class uncomfortable to sleep. Crew never dimmed lights completely in an overnight flight to Europe. Would avoid AA if possible.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

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

Information on your arrival and departure airports