$102 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 8/11. 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$177
Idaho Falls
Idaho Falls1 stop$248
Hailey
Hailey1 stop$344
Lewiston
Lewiston1 stop$416
Twin Falls
Twin Falls1 stop$416
Pocatello
Pocatello1 stop$417
Spokane
Spokane1 stop$237
Boise
Boisenonstop$177
Idaho Falls
Idaho Falls1 stop$248
Hailey
Hailey1 stop$344
Lewiston
Lewiston1 stop$416
Twin Falls
Twin Falls1 stop$416
Pocatello
Pocatello1 stop$417
Spokane
Spokane1 stop$237

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

Tue, Oct 20 - Sat, Oct 31
Alaska Airlines Logo
4:42 pm - 7:42 pm
ONT
-
BOI
2h 00mnonstop
Alaska Airlines Logo
2:51 pm - 4:02 pm
BOI
-
ONT
2h 11mnonstop
$177Alaska Airlines
Tue, Oct 20 - Thu, Oct 29
Alaska Airlines Logo
4:42 pm - 7:42 pm
ONT
-
BOI
2h 00mnonstop
Alaska Airlines Logo
2:51 pm - 4:02 pm
BOI
-
ONT
2h 11mnonstop
$187Alaska Airlines
Tue, Oct 20 - Wed, Oct 28
Delta Logo
6:00 am - 12:17 pm
ONT
-
BOI
5h 17m
1 stop
Delta Logo
1:15 pm - 4:12 pm
BOI
-
ONT
3h 57m
1 stop
$203Delta
Sat, Oct 24 - Wed, Oct 28
Delta Logo
5:05 pm - 12:04 am
ONT
-
BOI
5h 59m
1 stop
Delta Logo
5:45 pm - 11:48 pm
BOI
-
ONT
7h 03m
1 stop
$205Delta
Wed, Sep 2 - Sun, Sep 6
Southwest Logo
9:05 am - 4:10 pm
ONT
-
BOI
6h 05m
1 stop
Southwest Logo
11:35 am - 2:45 pm
BOI
-
ONT
4h 10m
1 stop
$211Southwest
Tue, Sep 1 - Sun, Sep 6
Southwest Logo
2:10 pm - 10:15 pm
ONT
-
BOI
7h 05m
2 stops
Southwest Logo
11:35 am - 2:45 pm
BOI
-
ONT
4h 10m
1 stop
$216Southwest
Thu, Aug 27 - Mon, Aug 31
United Airlines Logo
6:00 am - 11:04 am
ONT
-
BOI
4h 04m
1 stop
United Airlines Logo
7:05 pm - 10:59 pm
BOI
-
ONT
4h 54m
1 stop
$217United Airlines
Thu, Oct 29 - Mon, Nov 9
Multiple Airlines Logo
2:58 pm - 1:34 pm
ONT
-
IDA
21h 36m
1 stop
Multiple Airlines Logo
7:47 pm - 12:02 pm
IDA
-
ONT
17h 15m
1 stop
$248Multiple Airlines
Thu, Aug 13 - Sun, Aug 16
Multiple Airlines Logo
11:47 am - 8:24 pm
ONT
-
GEG
8h 37m
1 stop
Multiple Airlines Logo
9:14 pm - 8:03 am
GEG
-
ONT
10h 49m
1 stop
$289Multiple Airlines
Thu, Jul 30 - Wed, Aug 5
United Airlines Logo
1:50 pm - 9:30 pm
ONT
-
JAC
6h 40m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
JAC
-
ONT
5h 12m
1 stop
$360United 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.

How much is a round-trip flight from Ontario 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 Ontario to Idaho departing in September.

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 5 days was to Boise, at $207 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 5 days was $207.

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 $167 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 $307.

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 $349, 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 May, when tickets cost $79 (return) on average. On the other hand, the most expensive months are November and December, when the average cost of round-trip tickets is $196 and $176 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, Tuesday 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 Tuesday, 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 52% 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$102
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 2% 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 4 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.
7.9
Alaska AirlinesOverall score based on 12507 reviews
8.5Crew
7.8Comfort
8.1Boarding
7.0Entertainment
7.0Food
Airline reviews

Flying into PAE was so easy because it’s baggage claim is quick and accesible. I had a car rental and the counter is inside the baggage claim area, very convenient.

10.0 ExcellentLinda, Jun 2026
LAX - PAE
Read more Alaska Airlines reviews

Flying into PAE was so easy because it’s baggage claim is quick and accesible. I had a car rental and the counter is inside the baggage claim area, very convenient.

It was a very short flight so there really wasn’t any entertainment my. The little pretzels were good though and the cabin crew was awesome.

The first flight was fine, great crew, but the plane was delayed 45 minutes to go to Seattle because of they were missing a ramp. That would make sense if the plane was actually at the gate. Not if we’re still waiting for a plane. After we landed we waited 30-45 minutes on the tarmac just to get off the plane. Alaska made me miss my connecting flight, wasting my time, and my money. I should honestly be reimbursed, but hey, when does the airline ever actually take accountability? Never.

Over all it was great. My original flight was canceled but they quickly rebooked me. I was frustrated because I had to cancel my entire plans for the day but all considered, not bad. The crew tried to keep us calm while we sat in the plane for was felt was an hour or so but they could use a bit of a script. The seats were comfortable and I would give it another try.

Flight delayed Didn’t send second leg of trip itemerary First class was fair, but not great.

Short trip, was nice to have a drink on the short flight still.

Not able to get boarding pass for domestic connection flight when check in at international airport. I was told I need to get connection flight boarding pass after I entered US. It us very inconvenient.

Wish there were more complimentary drinks available - only had water and apple juice. Also - no snacks were provided during the flight, but we were offered some items as we exited the plane.

No negatives. Crew was great, flight was on time and there were no crazy passengers. 🤩

The seats are too small/crowded. It is frustrating to be forced to sit with someone who is overweight as they crown the other seat. Nothing against the person…just the airline companies who continue(over decades!)to reduce seat sizes. Americans are fat. Those of us who are not are tired of being compromised by the airline companies who don’t faces that fact and make adjustments. Maybe have “overweight seats”? Maybe give us a discount for being forced into an uncomfortable flight due to others overweightness? Please, make adjustments…be accountable. Thanks!

Was fine, delayed and feels like southwest is always late

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

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.

Flight delayed four separate times. I’m now one hour hours late to landing.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Long story short, it was one of the better flight experiences I've had in some time when compared with other airlines.

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Service was professional and quick. Premium economy seat was comfortable given the class

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

Over 2.5 hour maintenance delay on first morning flight with no acknowledgement, compensation or even gesture of good will. Aircraft had overnighted at airport so issue should have been addressed prior to boarding. Over 3.5 hours before first slow and deliberate beverage service.

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

No screens or meal options. Freezing cold. Dirty seats. Left late.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

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

Information on your arrival and departure airports