$94 Find Cheap Flights from Ontario 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 Ontario to Idaho departing on 8/29. 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.
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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$252
Hailey
Hailey1 stop$427
Lewiston
Lewiston1 stop$564
Twin Falls
Twin Falls1 stop$825
Pocatello
Pocatello1 stop$317
Spokane
Spokane1 stop$247
Boise
Boisenonstop$177
Idaho Falls
Idaho Falls1 stop$252
Hailey
Hailey1 stop$427
Lewiston
Lewiston1 stop$564
Twin Falls
Twin Falls1 stop$825
Pocatello
Pocatello1 stop$317
Spokane
Spokane1 stop$247

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

Sat, Sep 19 - Tue, Sep 22
Alaska Airlines Logo
4:50 pm - 7:45 pm
ONT
-
BOI
1h 55mnonstop
Alaska Airlines Logo
3:02 pm - 4:10 pm
BOI
-
ONT
2h 08mnonstop
$177Alaska Airlines
Wed, Sep 16 - Sat, Sep 19
Alaska Airlines Logo
4:50 pm - 7:45 pm
ONT
-
BOI
1h 55mnonstop
Alaska Airlines Logo
3:02 pm - 4:10 pm
BOI
-
ONT
2h 08mnonstop
$177Alaska Airlines
Tue, Sep 22 - Tue, Sep 29
Southwest Logo
4:45 pm - 10:30 pm
ONT
-
BOI
4h 45m
1 stop
Southwest Logo
7:40 am - 1:10 pm
BOI
-
ONT
6h 30m
1 stop
$187Southwest
Wed, Sep 16 - Sat, Sep 19
Southwest Logo
4:45 pm - 10:30 pm
ONT
-
BOI
4h 45m
1 stop
Southwest Logo
11:35 am - 2:15 pm
BOI
-
ONT
3h 40m
1 stop
$187Southwest
Wed, Nov 18 - Mon, Nov 23
Delta Logo
6:00 am - 10:40 am
ONT
-
BOI
3h 40m
1 stop
Delta Logo
6:50 pm - 11:58 pm
BOI
-
ONT
6h 08m
1 stop
$197Delta
Wed, Sep 9 - Mon, Sep 14
Delta Logo
5:15 pm - 11:58 pm
ONT
-
BOI
5h 43m
1 stop
Delta Logo
6:44 pm - 11:47 pm
BOI
-
ONT
6h 03m
1 stop
$197Delta
Sat, Oct 24 - Tue, Oct 27
American Airlines Logo
6:15 am - 1:22 pm
ONT
-
BOI
6h 07m
1 stop
American Airlines Logo
2:02 pm - 6:43 pm
BOI
-
ONT
5h 41m
1 stop
$197American Airlines
Sat, Oct 17 - Tue, Oct 20
American Airlines Logo
6:15 am - 1:22 pm
ONT
-
BOI
6h 07m
1 stop
American Airlines Logo
2:02 pm - 6:43 pm
BOI
-
ONT
5h 41m
1 stop
$197American Airlines
Fri, Nov 6 - Tue, Nov 10
United Airlines Logo
5:00 am - 1:25 pm
ONT
-
JAC
7h 25m
1 stop
United Airlines Logo
4:10 pm - 8:51 pm
JAC
-
ONT
5h 41m
1 stop
$379United Airlines
Wed, Sep 2 - Sat, Sep 5
United Airlines Logo
9:01 am - 4:39 pm
ONT
-
JAC
6h 38m
1 stop
United Airlines Logo
4:25 pm - 8:53 pm
JAC
-
ONT
5h 28m
1 stop
$379United 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 October.

Flight prices are below average for this route right now.

Flights to Idaho from Ontario usually cost between $217 and $320 in October.
The lowest price found in the past 5 days was $177 on Alaska Airlines (Oct 28-Oct 31).

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 $177 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 $177.

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 $299.

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 $287, 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 December and July, when the average cost of round-trip tickets is $411 and $409 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 53% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low season

January

Cheapest flight

$94
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 5% lower on average.
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 3 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 4227 reviews
8.1Boarding
8.0Comfort
7.5Entertainment
7.0Food
8.6Crew
Airline reviews

Red eye from San Diego. Temperature of the cabin was way too warm and the air duct flowed very little air.

6.0 GoodGordon, Jul 2026
SAN - MCO
Read more Southwest reviews

Red eye from San Diego. Temperature of the cabin was way too warm and the air duct flowed very little air.

I think Southwest is the number one airline that anyone can fly I have flown for the first time Frontier and what a joke and their customer service United was a very strange experience I'm only sticking to Southwest from here on out for sure

Great job Southwest! My family doesn't fly often but we felt safe the whole time.

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

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!

I liked receiving attention from aged and well experienced flight attendants. I disliked the non-gluten-free snack but I brought my own so I was OK.

The seat on row 11 was a little hard cause my butt was hurting a little bit from sitting after and hour.

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.

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.

My daughter has anxiety and became nauseous after boarding the plane and before take off. She went to the plane bathroom and ended up having to vomit, and your staff promptly removed us from the flight. We explained that it was due to my daughter’s anxiety, and that the condition would not continue in the air, but they removed us anyway. We have flown many many times before on many different airlines and my daughter’s anxiety has resulted in nausea and sickness before takeoff, and every airline has been accommodating and professional. This is was our first time flying with your airline, and also the first time we have ever been removed from a flight. This was the worst service we have ever experienced. This was a special surprise trip we gifted to my daughter for graduating college. I had also paid to upgrade the family to first class and sit all together which we had never done before and can’t afford on a normal basis. Our removal from the flight was not only extremely embarrassing, but devastating for my daughter. My daughter and I were removed from the plane and a call was made by your staff to medical personnel, a few questions were asked of my daughter, and then she was magically cleared. All of this took mere minutes. Why this could not have been performed while we were on the plane, or why this could not have been performed off the plane and then us allowed to reboard is beyond me. My wife and youngest daughter continued on the original flight alone and were very upset and crying due to the situation, yet the staff did nothing to console or assist them. My wife states that upon arrival in Portland and as they were exiting the plane, one of the stewardesses involved said “byyyyeeeee” to them sarcastically and laughed. Myself and my oldest daughter had to wait 4 hours for an alternate flight and were sat in regular seats because our first class seat purchase could not be honored. My wife wasn’t allowed to pick up our rental car and had to wait 4 hours with our luggage until I arrived. The delay prevented us from being able to carry out planned events and ruined the first day of our trip. Upon explaining all of this to your customer service, we received no sympathy, assistance, or compensation other than your staff submitting a request for a reimbursement of my and my daughters first class upgrade cost. When checking in early for our flight back home, the luggage cost for myself and my eldest daughter was no longer discounted as it was for my wife and youngest daughter. Customer service once again could not assist me over the phone and rectify what should have been a minor adjustment. Instead they stated I would have to wait until we physically checked bags in at the airport and then ask staff to adjust the luggage cost. With everything else we had experienced, I was not going to leave that to chance and instead paid full price for the luggage ahead of time. Or experience with Alaska Airlines was a complete disaster and I am baffled at the lack of empathy and assistance from your staff. I’m not sure of what else to say other than the fact that unless we are compensated by Alaska Airlines in some form to offset the horrendous service we received, we will be relaying our experience to family and friends and on social media, and doing all we can to urge everyone to avoid utilizing your services.

I got an email 3 hours before the flight letting me know it got canceled

Boarding was easy and quick. Staff was very friendly. Service of snacks and drinks by staff was outstanding.

It was ok! Not fond of sitting in middle seat. Tried to upgrade with my Atmos card but it was a new account and they weren’t able to look up my account details.

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.

There is no entertainment on the plane. The snack is minimal. The crew was nice and professional.

The first leg of the trip was excellent. Lovely flight attendants and comfortable plane. The second leg left a lot to be desired. The flight attendant was rude when I asked for a Diet Coke, the boarding required quite a long walk and the plane was crammed and uncomfortable.

Delta is always late. Ruined our first day of a short vacation. Timing is important. We pay to stay on an itinerary

Seats were not bad enough and uncomfortable good legroom in the emergency exit row we were in, but we were forbidden to hold my grandson on my lap for a little while, and the stewardess passed us saying it was against regulations which makes little or no sense when you’re 36,000 feet. The food snacks were really bad. Tasteless tasted like wallpaper, but we’re supposed to be protein bars, and the announcements were all completely incoherent because of the noise of the airplane and the lowness and crackly nature of the PA system.. this was disgraceful. No one in our party could understand a word of what the captain or the flight attendant were saying —not a word! The landing was a little hairy in a pretty stiff crosswind -we bounced before the plane stabilized on the runway

Flight team was great and we even arrived ahead of plan!

I missed the flight because the Minneapolis flight was 49 minutes LATE, and the Boise flight LEFT 24 minutes EARLY!

Having to up charge for a seat assignment is not good. Delta can do better

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

The flight was overbooked and the staff at the gate started calling for volunteers to drop out and offering incentives. That delayed the flight

There was no wifi even after my husband paid for wifi it wasn’t working. The plane looked and felt old.

Update the cabin with tv screens or at least music sources.

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

Information on your arrival and departure airports