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Cheap flights from Ontario to Idaho Falls from $128

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Idaho Falls departing on 9/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Idaho Falls (ONT-IDA)

Cheap round-trip flights

Logo
6:54 pm - 4:14 pmONT-IDA
20h 20m1 stop
Logo
7:40 pm - 8:42 pmIDA-ONT
26h 02m1 stop
$274
Find Deal
Thu, Oct 23 - Mon, Oct 27
Alaska Airlines Logo
1:31 pm - 10:38 pmONT-IDA
8h 07m1 stop
Alaska Airlines Logo
6:00 am - 12:37 pmIDA-ONT
7h 37m1 stop
$279Alaska Airlines
Find Deal
Tue, Oct 21 - Sat, Oct 25
Hawaiian Airlines Logo
6:00 am - 3:13 pmONT-IDA
8h 13m1 stop
Hawaiian Airlines Logo
6:05 am - 11:05 amIDA-ONT
6h 00m1 stop
$328Hawaiian Airlines
Find Deal
Fri, Nov 14 - Sun, Nov 16
Delta Logo
6:00 am - 12:33 pmONT-IDA
5h 33m1 stop
Delta Logo
6:53 pm - 9:20 pmIDA-ONT
3h 27m1 stop
$329Delta
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Sat, Oct 25 - Sat, Oct 25
United Airlines Logo
1:15 pm - 8:54 pmONT-IDA
6h 39m1 stop
United Airlines Logo
4:00 pm - 8:43 pmIDA-ONT
5h 43m1 stop
$330United Airlines
Find Deal
Thu, Sep 18 - Tue, Sep 23
United Airlines Logo
5:10 am - 1:30 pmONT-IDA
7h 20m1 stop
United Airlines Logo
4:15 pm - 8:43 pmIDA-ONT
5h 28m1 stop
$331United Airlines
Find Deal
Wed, Sep 10 - Thu, Sep 18
Delta Logo
6:00 am - 12:33 pmONT-IDA
5h 33m1 stop
Delta Logo
6:53 pm - 11:39 pmIDA-ONT
5h 46m1 stop
$350Delta
Find Deal
Tue, Oct 21 - Thu, Oct 23
Hawaiian Airlines Logo
6:00 am - 2:06 pmONT-IDA
7h 06m1 stop
Hawaiian Airlines Logo
8:00 am - 3:12 pmIDA-ONT
8h 12m1 stop
$365Hawaiian Airlines
Find Deal
Thu, Dec 18 - Mon, Jan 12
American Airlines Logo
10:09 am - 9:48 pmONT-IDA
10h 39m2 stops
American Airlines Logo
7:15 am - 12:03 pmIDA-ONT
5h 48m1 stop
$371American Airlines
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Wed, Oct 29 - Mon, Nov 3
American Airlines Logo
12:45 pm - 9:23 pmONT-IDA
7h 38m1 stop
American Airlines Logo
6:44 am - 6:16 pmIDA-ONT
12h 32m2 stops
$405American Airlines
Find Deal
Thu, Oct 2 - Fri, Oct 3

Alaska Airlines flights from Ontario to Idaho Falls

Our best Alaska Airlines deals on Ontario to Idaho Falls flight tickets
Alaska Airlines
Oct 21
ONT1:31 pmOntario
8h 07m
1 stop
IDA10:38 pmIdaho Falls Fanning Field
Oct 25
IDA6:00 amIdaho Falls Fanning Field
7h 37m
1 stop
ONT12:37 pmOntario
$279
Find similar
Alaska Airlines
Oct 21
ONT1:31 pmOntario
8h 07m
1 stop
IDA10:38 pmIdaho Falls Fanning Field
Oct 27
IDA3:50 pmIdaho Falls Fanning Field
6h 03m
1 stop
ONT8:53 pmOntario
$289
Find similar
Alaska Airlines
Nov 6
ONT4:11 pmOntario
6h 48m
1 stop
IDA11:59 pmIdaho Falls Fanning Field
Nov 10
IDA3:50 pmIdaho Falls Fanning Field
6h 03m
1 stop
ONT8:53 pmOntario
$300
Find similar

United Airlines flights from Ontario to Idaho Falls

Our best United Airlines deals on Ontario to Idaho Falls flight tickets
United Airlines
Sep 18
ONT1:15 pmOntario
6h 39m
1 stop
IDA8:54 pmIdaho Falls Fanning Field
Sep 23
IDA4:00 pmIdaho Falls Fanning Field
5h 43m
1 stop
ONT8:43 pmOntario
$330
Find similar
United Airlines
Sep 10
ONT5:10 amOntario
7h 20m
1 stop
IDA1:30 pmIdaho Falls Fanning Field
Sep 18
IDA4:15 pmIdaho Falls Fanning Field
5h 28m
1 stop
ONT8:43 pmOntario
$331
Find similar
United Airlines
Sep 10
ONT5:10 amOntario
7h 20m
1 stop
IDA1:30 pmIdaho Falls Fanning Field
Sep 17
IDA4:15 pmIdaho Falls Fanning Field
5h 28m
1 stop
ONT8:43 pmOntario
$338
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 27, 2025.
Use the filters below to find and compare flights from Ontario to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 10/23

6:54 pm-4:14 pm

1 stop20h 20m

Idaho Falls Fanning Field

Mon 10/27

7:40 pm-8:42 pm

1 stop26h 02m

$274

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 10/21

1:31 pm-10:38 pm

1 stop8h 07m

Idaho Falls Fanning Field

Sat 10/25

6:00 am-12:37 pm

1 stop7h 37m

$279

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 11/14

6:00 am-3:13 pm

1 stop8h 13m

Idaho Falls Fanning Field

Sun 11/16

6:05 am-11:05 am

1 stop6h 00m

$328

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sat 10/25

6:00 am-12:33 pm

1 stop5h 33m

Idaho Falls Fanning Field

Sat 10/25

6:53 pm-9:20 pm

1 stop3h 27m

$329

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 9/18

1:15 pm-8:54 pm

1 stop6h 39m

Idaho Falls Fanning Field

Tue 9/23

4:00 pm-8:43 pm

1 stop5h 43m

$330

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 9/10

5:10 am-1:30 pm

1 stop7h 20m

Idaho Falls Fanning Field

Thu 9/18

4:15 pm-8:43 pm

1 stop5h 28m

$331

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 10/21

6:00 am-12:33 pm

1 stop5h 33m

Idaho Falls Fanning Field

Thu 10/23

6:53 pm-11:39 pm

1 stop5h 46m

$350

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 12/18

6:00 am-2:06 pm

1 stop7h 06m

Idaho Falls Fanning Field

Mon 1/12

8:00 am-3:12 pm

1 stop8h 12m

$365

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 10/29

10:09 am-9:48 pm

2 stops10h 39m

Idaho Falls Fanning Field

Mon 11/3

7:15 am-12:03 pm

1 stop5h 48m

$371

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 10/2

12:45 pm-9:23 pm

1 stop7h 38m

Idaho Falls Fanning Field

Fri 10/3

6:44 am-6:16 pm

2 stops12h 32m

$405

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Idaho Falls from

How to get the cheapest flight ticket from Ontario to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Idaho Falls?

Our data shows that Tuesday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $359. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Sunday is $625.

What is the cheapest time of day to depart on your flight to Idaho Falls?

Our most recent data shows that the best time of day to fly to Idaho Falls is at noon. Flights from Ontario to Idaho Falls during this time can be as low as $373. Try not to purchase tickets in the morning because they tend to be around $513. Of course, these prices can vary depending on the time of year and what airport you fly to.

When to book flights from Ontario to Idaho Falls

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Idaho Falls according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Idaho Falls (ONT to IDA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Idaho Falls

Direct flights

None
There are no direct flights from Ontario to Idaho Falls. There are no popular flight routes from Ontario to Idaho Falls.
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  • How far is Ontario to Idaho Falls Fanning Field by plane?

    A flight from Ontario to Idaho Falls Fanning Field will travel around 715.8 mi. Flights usually cover this in 4h 45m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Ontario Airport to Idaho Falls Fanning Field Airport?

    Prices for flights from Ontario Airport to Idaho Falls Fanning Field Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from Ontario Airport to Idaho Falls Fanning Field Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The necessary travel and health documents for your Idaho Falls Fanning Field Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to Idaho Falls?

Best airlines flying from Ontario to Idaho Falls

Compare and see reviews for airlines that fly from Ontario to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $219Free CancellationRating
7.9
7,977 reviews
Search Delta flights

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Idaho Falls?

It is quick and easy to find Ontario to Idaho Falls flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Idaho Falls that suits you.

Can I find flights from Ontario to Idaho Falls with flexible booking policies on momondo?

momondo does allow users to show only those flights to Idaho Falls from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Idaho Falls?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Idaho Falls.

I’m not ready to book a flight from Ontario to Idaho Falls right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Idaho Falls flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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