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Cheap flights from Ontario to Idaho Falls from $107

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 1/8. 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.
Alaska Airlines Logo
4:03 pm - 10:59 pm
ONT
-
IDA
5h 56m1 stop
Alaska Airlines Logo
6:58 pm - 8:36 pm
IDA
-
ONT
26h 38m1 stop
$285Alaska Airlines
Thu, Jan 22 - Mon, Jan 26
Alaska Airlines Logo
4:03 pm - 6:18 pm
ONT
-
IDA
25h 15m1 stop
Alaska Airlines Logo
6:58 pm - 11:56 pm
IDA
-
ONT
5h 58m1 stop
$294Alaska Airlines
Fri, Jan 9 - Mon, Jan 12
Alaska Airlines Logo
4:03 pm - 6:18 pm
ONT
-
IDA
25h 15m1 stop
Alaska Airlines Logo
6:58 pm - 11:56 pm
IDA
-
ONT
5h 58m1 stop
$304Alaska Airlines
Thu, Jan 8 - Mon, Jan 12
Delta Logo
5:07 pm - 10:19 pm
ONT
-
IDA
4h 12m1 stop
Delta Logo
1:15 pm - 10:51 pm
IDA
-
ONT
10h 36m2 stops
$307Delta
Fri, Jan 9 - Sat, Jan 17
Delta Logo
5:07 pm - 10:19 pm
ONT
-
IDA
4h 12m1 stop
Delta Logo
6:35 pm - 1:56 pm
IDA
-
ONT
20h 21m2 stops
$313Delta
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
5:05 am - 1:30 pm
ONT
-
IDA
7h 25m1 stop
United Airlines Logo
4:19 pm - 8:58 pm
IDA
-
ONT
5h 39m1 stop
$319United Airlines
Fri, Jan 9 - Sat, Jan 17
Alaska Airlines Logo
4:03 pm - 10:59 pm
ONT
-
IDA
5h 56m1 stop
Alaska Airlines Logo
6:58 pm - 10:59 am
IDA
-
ONT
17h 01m1 stop
$324Alaska Airlines
Thu, Jan 22 - Sun, Jan 25
Delta Logo
5:07 pm - 10:19 pm
ONT
-
IDA
4h 12m1 stop
Delta Logo
6:35 pm - 1:56 pm
IDA
-
ONT
20h 21m2 stops
$327Delta
Fri, Jan 9 - Mon, Jan 12
Alaska Airlines Logo
6:00 am - 10:59 pm
ONT
-
IDA
15h 59m1 stop
Alaska Airlines Logo
6:58 pm - 8:10 pm
IDA
-
ONT
26h 12m2 stops
$343Alaska Airlines
Thu, Jan 22 - Mon, Jan 26
Alaska Airlines Logo
11:53 am - 6:18 pm
ONT
-
IDA
5h 25m1 stop
Alaska Airlines Logo
6:58 pm - 5:03 pm
IDA
-
ONT
23h 05m2 stops
$353Alaska Airlines
Fri, Jan 9 - Sat, Jan 17

Alaska Airlines flights from Ontario to Idaho Falls

Our best Alaska Airlines deals on Ontario to Idaho Falls flight tickets
Alaska Airlines
Jan 22
ONT4:03 pmOntario
5h 56m
1 stop
IDA10:59 pmIdaho Falls Fanning Field
Jan 26
IDA6:58 pmIdaho Falls Fanning Field
26h 38m
1 stop
ONT8:36 pmOntario
$285
Find similar
Alaska Airlines
Jan 9
ONT4:03 pmOntario
25h 15m
1 stop
IDA6:18 pmIdaho Falls Fanning Field
Jan 12
IDA6:58 pmIdaho Falls Fanning Field
5h 58m
1 stop
ONT11:56 pmOntario
$294
Find similar
Alaska Airlines
Jan 8
ONT4:03 pmOntario
25h 15m
1 stop
IDA6:18 pmIdaho Falls Fanning Field
Jan 12
IDA6:58 pmIdaho Falls Fanning Field
5h 58m
1 stop
ONT11:56 pmOntario
$304
Find similar

Delta flights from Ontario to Idaho Falls

Our best Delta deals on Ontario to Idaho Falls flight tickets
Delta
Jan 9
ONT5:07 pmOntario
4h 12m
1 stop
IDA10:19 pmIdaho Falls Fanning Field
Jan 17
IDA1:15 pmIdaho Falls Fanning Field
10h 36m
2 stops
ONT10:51 pmOntario
$307
Find similar
Delta
Jan 8
ONT5:07 pmOntario
4h 12m
1 stop
IDA10:19 pmIdaho Falls Fanning Field
Jan 12
IDA6:35 pmIdaho Falls Fanning Field
20h 21m
2 stops
ONT1:56 pmOntario
$313
Find similar
Delta
Jan 9
ONT5:07 pmOntario
4h 12m
1 stop
IDA10:19 pmIdaho Falls Fanning Field
Jan 12
IDA6:35 pmIdaho Falls Fanning Field
20h 21m
2 stops
ONT1:56 pmOntario
$327
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 December 11, 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 1/22

4:03 pm-10:59 pm

1 stop5h 56m

Idaho Falls Fanning Field

Mon 1/26

6:58 pm-8:36 pm

1 stop26h 38m

$285

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 1/9

4:03 pm-6:18 pm

1 stop25h 15m

Idaho Falls Fanning Field

Mon 1/12

6:58 pm-11:56 pm

1 stop5h 58m

$294

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 1/8

4:03 pm-6:18 pm

1 stop25h 15m

Idaho Falls Fanning Field

Mon 1/12

6:58 pm-11:56 pm

1 stop5h 58m

$304

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 1/9

5:07 pm-10:19 pm

1 stop4h 12m

Idaho Falls Fanning Field

Sat 1/17

1:15 pm-10:51 pm

2 stops10h 36m

$307

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 1/8

5:07 pm-10:19 pm

1 stop4h 12m

Idaho Falls Fanning Field

Mon 1/12

6:35 pm-1:56 pm

2 stops20h 21m

$313

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 1/9

5:05 am-1:30 pm

1 stop7h 25m

Idaho Falls Fanning Field

Sat 1/17

4:19 pm-8:58 pm

1 stop5h 39m

$319

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 1/22

4:03 pm-10:59 pm

1 stop5h 56m

Idaho Falls Fanning Field

Sun 1/25

6:58 pm-10:59 am

1 stop17h 01m

$324

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 1/9

5:07 pm-10:19 pm

1 stop4h 12m

Idaho Falls Fanning Field

Mon 1/12

6:35 pm-1:56 pm

2 stops20h 21m

$327

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 1/22

6:00 am-10:59 pm

1 stop15h 59m

Idaho Falls Fanning Field

Mon 1/26

6:58 pm-8:10 pm

2 stops26h 12m

$343

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 1/9

11:53 am-6:18 pm

1 stop5h 25m

Idaho Falls Fanning Field

Sat 1/17

6:58 pm-5:03 pm

2 stops23h 05m

$353

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest 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

Fastest flight time

4h 02m

Direct flights

None
The fastest flight from Ontario to Idaho Falls takes 4h 02m
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 02m, 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
8,007 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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