ONT - IDA

$128 Find Cheap Flights from Ontario to Idaho Falls

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 Falls departing on 11/13. 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 Falls

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

Cheap Flights from Ontario to Idaho Falls (ONT-IDA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Idaho Falls 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 Falls

Wed, Nov 26 - Mon, Dec 1
Multiple Airlines Logo
6:30 am - 4:03 pmONT-IDA
8h 33m1 stop
Multiple Airlines Logo
7:58 pm - 9:17 pmIDA-ONT
26h 19m1 stop
$263Multiple Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
Multiple Airlines Logo
3:31 pm - 6:07 pmONT-IDA
25h 36m1 stop
Multiple Airlines Logo
4:39 pm - 9:17 pmIDA-ONT
5h 38m1 stop
$279Multiple Airlines
Find Deal
Thu, Jan 29 - Mon, Feb 2
Alaska Airlines Logo
4:03 pm - 10:59 pmONT-IDA
5h 56m1 stop
Alaska Airlines Logo
6:58 pm - 11:56 pmIDA-ONT
5h 58m1 stop
$309Alaska Airlines
Find Deal
Tue, Apr 28 - Wed, Apr 29
Alaska Airlines Logo
3:33 pm - 10:35 pmONT-IDA
6h 02m1 stop
Alaska Airlines Logo
6:15 am - 10:53 amIDA-ONT
5h 38m1 stop
$334Alaska Airlines
Find Deal
Tue, Apr 28 - Wed, Apr 29
Delta Logo
5:05 pm - 10:14 pmONT-IDA
4h 09m1 stop
Delta Logo
1:05 pm - 10:40 pmIDA-ONT
10h 35m2 stops
$365Delta
Find Deal
Tue, Apr 28 - Wed, Apr 29
Delta Logo
11:55 am - 10:14 pmONT-IDA
9h 19m2 stops
Delta Logo
1:05 pm - 10:40 pmIDA-ONT
10h 35m2 stops
$370Delta
Find Deal
Mon, Dec 1 - Mon, Dec 8
American Airlines Logo
4:47 pm - 10:34 pmONT-IDA
28h 47m1 stop
American Airlines Logo
7:00 am - 12:00 pmIDA-ONT
6h 00m1 stop
$460American Airlines
Find Deal
Tue, Nov 25 - Sat, Nov 29
American Airlines Logo
4:47 pm - 10:34 pmONT-IDA
4h 47m1 stop
American Airlines Logo
7:10 am - 12:03 pmIDA-ONT
5h 53m1 stop
$496American Airlines
Find Deal
Sat, Dec 20 - Mon, Jan 5
United Airlines Logo
5:05 am - 1:30 pmONT-IDA
7h 25m1 stop
United Airlines Logo
4:05 pm - 9:08 pmIDA-ONT
6h 03m1 stop
$539United Airlines
Find Deal
Tue, Dec 23 - Mon, Dec 29
United Airlines Logo
5:05 am - 9:58 amONT-IDA
27h 53m1 stop
United Airlines Logo
4:05 pm - 9:07 pmIDA-ONT
6h 02m1 stop
$562United Airlines
Find Deal

Everything you should know

Top airlines
Alaska Airlines
Cheapest • from $309 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$263
Multiple Airlines
Wed 11/26Mon 12/1
ONT - IDA • 1 stop
Cheapest one-way
$128
Typical prices: $171-$188
Multiple Airlines
Thu 11/13
ONT - IDA • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Idaho Falls!
Booking Insights

KAYAK's insights & trends for Ontario to Idaho Falls flights

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

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

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

If you are looking for a flight deal from Ontario to Idaho Falls, look for departures on Wednesdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Idaho Falls, Friday is the cheapest day to fly and Tuesday is the most expensive.

Find deals

Good to know

Low seasonJuly
Cheapest flight$128
Best time to beat the crowds with an average 50% drop in price.
Most popular time to fly and prices are also 50% lower on average.
Flight from Ontario to Idaho Falls

When to book flights from Ontario to Idaho Falls

Are your dates flexible? Find out the best times to travel from Ontario to Idaho Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Idaho Falls

  • What is the cheapest flight from Ontario to Idaho Falls?

    In the last 3 days, the lowest price for a flight from Ontario to Idaho Falls was $128 for a one-way ticket and $263 for a round-trip.

  • Do I need a passport to fly between Ontario and Idaho Falls?

    No

  • Which aircraft models fly most regularly from Ontario to Idaho Falls?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Idaho Falls?

    SkyTeam is the only airline alliance operating flights between Ontario and Idaho Falls.

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

    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 Falls.

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

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

    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 to Idaho Falls with an airline and back to Ontario with another airline. Booking your flights between Ontario and IDA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Idaho Falls?

    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 to Idaho Falls from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Idaho Falls

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Idaho Falls. 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 Falls? 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
DeltaOverall score based on 7992 reviews
7.3Food
8.2Boarding
7.9Comfort
7.9Entertainment
8.5Crew
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

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

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

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

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

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

Information on your arrival and departure airports

Ontario (ONT)
Idaho Falls (IDA)

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