ONT - IDA

$160 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 5/21. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$236
Multiple Airlines
Thu 4/9Mon 4/13
ONT - IDA • 1 stop
Cheapest one-way
$160
Multiple Airlines
Thu 5/21
ONT - IDA • 1 stop
Top airlines
Delta
Cheapest • from $314 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Idaho Falls. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Portland (PDX)
Cheapest • Avg $322 (round-trip)
Salt Lake City (SLC)
Shortest trip • 3h 47m (one-way)
Insights
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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!
Flight Deals
Booking Insights
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

Thu, Apr 9 - Mon, Apr 13
Multiple Airlines Logo
10:27 pm - 3:27 pm
ONT
-
IDA
16h 00m
1 stop
Multiple Airlines Logo
10:21 pm - 10:44 am
IDA
-
ONT
13h 23m
1 stop
$236Multiple Airlines
Thu, Apr 9 - Mon, Apr 13
Multiple Airlines Logo
10:27 pm - 3:27 pm
ONT
-
IDA
16h 00m
1 stop
Multiple Airlines Logo
10:21 pm - 11:55 pm
IDA
-
ONT
26h 34m
2 stops
$278Multiple Airlines
Wed, May 13 - Fri, May 15
Delta Logo
6:00 am - 10:47 am
ONT
-
IDA
3h 47m
1 stop
Delta Logo
6:00 am - 8:53 am
IDA
-
ONT
3h 53m
1 stop
$314Delta
Tue, Apr 14 - Tue, Apr 21
Delta Logo
5:05 pm - 10:40 pm
ONT
-
IDA
4h 35m
1 stop
Delta Logo
6:58 pm - 11:44 pm
IDA
-
ONT
5h 46m
1 stop
$337Delta
Sat, Apr 25 - Sat, May 2
Delta Logo
5:59 pm - 10:40 pm
ONT
-
IDA
3h 41m
1 stop
Delta Logo
6:58 pm - 10:43 pm
IDA
-
ONT
4h 45m
1 stop
$350Delta
Wed, May 13 - Fri, May 15
Delta Logo
1:35 pm - 10:42 pm
ONT
-
IDA
8h 07m
2 stops
Delta Logo
6:00 am - 8:53 am
IDA
-
ONT
3h 53m
1 stop
$361Delta
Fri, May 1 - Wed, May 6
Delta Logo
5:05 pm - 10:40 pm
ONT
-
IDA
4h 35m
1 stop
Delta Logo
6:58 pm - 11:43 pm
IDA
-
ONT
5h 45m
1 stop
$373Delta
Mon, Jul 6 - Mon, Jul 13
Multiple Airlines Logo
10:07 am - 4:00 pm
ONT
-
IDA
4h 53m
1 stop
Multiple Airlines Logo
10:47 pm - 8:16 pm
IDA
-
ONT
22h 29m
1 stop
$377Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
Delta Logo
5:05 pm - 10:40 pm
ONT
-
IDA
4h 35m
1 stop
Delta Logo
5:47 am - 1:39 pm
IDA
-
ONT
8h 52m
2 stops
$378Delta
Sun, Jul 19 - Wed, Jul 22
Delta Logo
6:00 am - 10:39 am
ONT
-
IDA
3h 39m
1 stop
Delta Logo
6:10 am - 9:01 am
IDA
-
ONT
3h 51m
1 stop
$381Delta
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.

Which airlines provide the cheapest flights from Ontario to Idaho Falls?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Idaho Falls were found on Delta ($314) and Alaska Airlines ($422).

Find deals

Good to know

Cheapest flight$160
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 $160 for a one-way ticket and $236 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 8286 reviews
8.1Boarding
7.9Comfort
8.5Crew
7.2Food
7.8Entertainment
Airline reviews

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.

2.0 MediocreIsabella, Mar 2026
SJC - SLC
Read more Delta reviews

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.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

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)