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Cheap flights from Ontario to Idaho Falls from $159

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 11/18. 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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:15 am - 1:16 pmONT-IDA
6h 01m1 stop
Multiple Airlines Logo
4:39 pm - 9:17 pmIDA-ONT
5h 38m1 stop
$247Multiple Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 7
Multiple Airlines Logo
5:06 pm - 4:03 pmONT-IDA
21h 57m1 stop
Multiple Airlines Logo
7:58 pm - 9:17 pmIDA-ONT
26h 19m1 stop
$274Multiple Airlines
Find Deal
Tue, Nov 25 - Mon, Dec 1
Multiple Airlines Logo
6:15 am - 7:26 pmONT-IDA
12h 11m2 stops
Multiple Airlines Logo
4:39 pm - 9:17 pmIDA-ONT
5h 38m1 stop
$283Multiple Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 7
Multiple Airlines Logo
5:06 pm - 4:03 pmONT-IDA
21h 57m1 stop
Multiple Airlines Logo
10:53 pm - 2:26 pmIDA-ONT
16h 33m1 stop
$296Multiple Airlines
Find Deal
Tue, Nov 25 - Sun, Nov 30
Alaska Airlines Logo
4:11 pm - 11:59 pmONT-IDA
6h 48m1 stop
Alaska Airlines Logo
6:05 am - 11:05 amIDA-ONT
6h 00m1 stop
$380Alaska Airlines
Find Deal
Wed, Nov 5 - Mon, Nov 10
Alaska Airlines Logo
4:11 pm - 11:59 pmONT-IDA
6h 48m1 stop
Alaska Airlines Logo
3:50 pm - 8:53 pmIDA-ONT
6h 03m1 stop
$384Alaska Airlines
Find Deal
Thu, Nov 6 - Thu, Nov 13
United Airlines Logo
5:05 am - 1:35 pmONT-IDA
7h 30m1 stop
United Airlines Logo
4:15 pm - 8:44 pmIDA-ONT
5h 29m1 stop
$420United Airlines
Find Deal
Thu, Nov 6 - Wed, Nov 12
United Airlines Logo
5:05 am - 1:35 pmONT-IDA
7h 30m1 stop
United Airlines Logo
4:15 pm - 8:44 pmIDA-ONT
5h 29m1 stop
$431United Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 9
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
$540American Airlines
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Fri, Nov 7 - Tue, Nov 11
American Airlines Logo
4:47 pm - 10:34 pmONT-IDA
4h 47m1 stop
American Airlines Logo
7:10 am - 6:20 pmIDA-ONT
12h 10m1 stop
$576American Airlines
Find Deal
Tue, Nov 25 - Sat, Nov 29

Delta flights from Ontario to Idaho Falls

Our best Delta deals on Ontario to Idaho Falls flight tickets
Delta
Oct 26
ONT4:35 pmOntario
4h 40m
1 stop
IDA10:15 pmIdaho Falls Fanning Field
Nov 15
IDA6:57 pmIdaho Falls Fanning Field
3h 52m
1 stop
ONT9:49 pmOntario
$515
Find similar
Delta
Oct 24
ONT4:35 pmOntario
4h 40m
1 stop
IDA10:15 pmIdaho Falls Fanning Field
Nov 15
IDA6:57 pmIdaho Falls Fanning Field
3h 52m
1 stop
ONT9:49 pmOntario
$565
Find similar
Delta
Oct 25
ONT7:35 amOntario
9h 38m
2 stops
IDA6:13 pmIdaho Falls Fanning Field
Nov 15
IDA1:15 pmIdaho Falls Fanning Field
10h 40m
2 stops
ONT10:55 pmOntario
$657
Find similar

United Airlines flights from Ontario to Idaho Falls

Our best United Airlines deals on Ontario to Idaho Falls flight tickets
United Airlines
Nov 6
ONT5:05 amOntario
7h 30m
1 stop
IDA1:35 pmIdaho Falls Fanning Field
Nov 12
IDA4:15 pmIdaho Falls Fanning Field
5h 29m
1 stop
ONT8:44 pmOntario
$420
Find similar
United Airlines
Nov 6
ONT5:05 amOntario
7h 30m
1 stop
IDA1:35 pmIdaho Falls Fanning Field
Nov 9
IDA4:15 pmIdaho Falls Fanning Field
5h 29m
1 stop
ONT8:44 pmOntario
$431
Find similar
United Airlines
Nov 6
ONT5:05 amOntario
7h 30m
1 stop
IDA1:35 pmIdaho Falls Fanning Field
Nov 10
IDA4:15 pmIdaho Falls Fanning Field
5h 29m
1 stop
ONT8:44 pmOntario
$451
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 October 23, 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

Fri 12/5

6:15 am-1:16 pm

1 stop6h 01m

Idaho Falls Fanning Field

Sun 12/7

4:39 pm-9:17 pm

1 stop5h 38m

$247

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 11/25

5:06 pm-4:03 pm

1 stop21h 57m

Idaho Falls Fanning Field

Mon 12/1

7:58 pm-9:17 pm

1 stop26h 19m

$274

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 12/5

6:15 am-7:26 pm

2 stops12h 11m

Idaho Falls Fanning Field

Sun 12/7

4:39 pm-9:17 pm

1 stop5h 38m

$283

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 11/25

5:06 pm-4:03 pm

1 stop21h 57m

Idaho Falls Fanning Field

Sun 11/30

10:53 pm-2:26 pm

1 stop16h 33m

$296

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 11/5

4:11 pm-11:59 pm

1 stop6h 48m

Idaho Falls Fanning Field

Mon 11/10

6:05 am-11:05 am

1 stop6h 00m

$380

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 11/6

4:11 pm-11:59 pm

1 stop6h 48m

Idaho Falls Fanning Field

Thu 11/13

3:50 pm-8:53 pm

1 stop6h 03m

$384

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 11/6

5:05 am-1:35 pm

1 stop7h 30m

Idaho Falls Fanning Field

Wed 11/12

4:15 pm-8:44 pm

1 stop5h 29m

$420

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 11/6

5:05 am-1:35 pm

1 stop7h 30m

Idaho Falls Fanning Field

Sun 11/9

4:15 pm-8:44 pm

1 stop5h 29m

$431

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 11/7

4:47 pm-10:34 pm

1 stop4h 47m

Idaho Falls Fanning Field

Tue 11/11

7:10 am-12:03 pm

1 stop5h 53m

$540

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 11/25

4:47 pm-10:34 pm

1 stop4h 47m

Idaho Falls Fanning Field

Sat 11/29

7:10 am-6:20 pm

1 stop12h 10m

$576

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.
Search flight deals

  • 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 47m, 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
7,982 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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