ONT - IDA

$144 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 8/24. 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

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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Flights 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, Sep 17 - Wed, Sep 24
Alaska Airlines Logo
6:00 am - 3:20 pmONT-IDA
8h 20m1 stop
Alaska Airlines Logo
6:13 am - 10:44 amIDA-ONT
5h 31m1 stop
$267Alaska Airlines
Find Deal
Wed, Sep 17 - Mon, Sep 29
Alaska Airlines Logo
3:04 pm - 10:39 pmONT-IDA
6h 35m1 stop
Alaska Airlines Logo
6:13 am - 10:44 amIDA-ONT
5h 31m1 stop
$277Alaska Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
Delta Logo
6:45 am - 6:04 pmONT-IDA
10h 19m2 stops
Delta Logo
6:05 am - 9:06 amIDA-ONT
4h 01m1 stop
$284Delta
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Sat, Sep 6 - Fri, Sep 12
Delta Logo
11:40 am - 10:27 pmONT-IDA
9h 47m2 stops
Delta Logo
6:50 pm - 11:46 pmIDA-ONT
5h 56m1 stop
$294Delta
Find Deal
Wed, Aug 6 - Fri, Aug 15
United Airlines Logo
5:05 am - 1:32 pmONT-IDA
7h 27m1 stop
United Airlines Logo
4:13 pm - 8:54 pmIDA-ONT
5h 41m1 stop
$425United Airlines
Find Deal
Sun, Aug 17 - Sat, Aug 23
American Airlines Logo
10:50 am - 9:19 pmONT-IDA
9h 29m1 stop
American Airlines Logo
7:00 am - 4:24 pmIDA-ONT
10h 24m2 stops
$436American Airlines
Find Deal
Fri, Aug 8 - Thu, Aug 14
American Airlines Logo
12:46 pm - 9:18 pmONT-IDA
7h 32m1 stop
American Airlines Logo
1:17 pm - 9:39 pmIDA-ONT
9h 22m2 stops
$473American Airlines
Find Deal
Thu, Aug 21 - Mon, Aug 25
United Airlines Logo
6:50 pm - 9:47 amONT-IDA
13h 57m2 stops
United Airlines Logo
5:56 pm - 12:13 pmIDA-ONT
19h 17m2 stops
$476United Airlines
Find Deal
Fri, Aug 15 - Sun, Aug 17
Hawaiian Airlines Logo
4:00 pm - 10:39 pmONT-IDA
5h 39m1 stop
Hawaiian Airlines Logo
6:15 am - 11:05 amIDA-ONT
5h 50m1 stop
$484Hawaiian Airlines
Find Deal
Sat, Jul 5 - Thu, Jul 10
Hawaiian Airlines Logo
4:00 pm - 10:39 pmONT-IDA
5h 39m1 stop
Hawaiian Airlines Logo
6:15 am - 11:05 amIDA-ONT
5h 50m1 stop
$490Hawaiian Airlines
Find Deal
Useful Info

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
High seasonOctober
Cheapest flight$144
Best time to beat the crowds with an average 50% drop in price.
Most popular time to fly and prices are also 35% 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 $144 for a one-way ticket and $267 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, oneworld, and Star Alliance are the airline alliances operating flights between Ontario and Idaho Falls, with oneworld being the most commonly used for this route.

  • 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.
8.0
DeltaOverall score based on 7964 reviews
8.5Crew
7.9Entertainment
7.9Comfort
7.3Food
8.2Boarding
Airline reviews

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

8.0 ExcellentMathew, Jun 2025SAN - JFK
Read more Delta reviews

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

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.

Delta flight was on time, seats were comfortable, and crew was nice.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

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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