What is the cheapest airline that flies from Idaho to Ontario?

Delta, Alaska Airlines, and Southwest are the most popular carriers operating from Idaho to Ontario

How many flights depart from Idaho to Ontario on average per week?

3 flights are operational weekly from Idaho to Ontario as of August 2025. The most popular departure day for this route is Mon, with 33% of flights per week taking off on this day.

What airlines fly to Ontario?

Alaska Airlines, Delta and Allegiant Air are the top three most popular airlines that fly to Ontario from Idaho according to our data. Alaska Airlines is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 9 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Ontario?

Average flight duration from Idaho to Ontario depends on which airport you fly into and out of. Flying from Boise to Los Angeles is 2h 15m on average, while flying from Hailey to Los Angeles is 2h 33m on average. Los Angeles is the most popular airport in Ontario.

When did momondo last update prices for flights from Idaho to Ontario Airport?

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

How many operators does momondo search for flights from Idaho to Ontario Airport?

As of August 2025, there are 4 operators available to choose from for flights from Idaho to Ontario Airport.

How old do you have to be to fly from Idaho to Ontario Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$80 Cheap Flights from Idaho to Ontario in 2025

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Find the cheapest flights from Idaho to Los Angeles

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

4:30 pm - 5:42 pmBOI-ONT

2h 12mnonstop

6:22 pm - 9:39 pmONT-BOI

2h 17mnonstop

$147Alaska Airlines

Find Deal

Fri, Jan 16 - Sat, Jan 31

5:43 pm - 11:42 pmBOI-ONT

6h 59m1 stop

6:00 am - 10:34 amONT-BOI

3h 34m1 stop

$159Delta

Find Deal

Fri, Sep 26 - Sun, Sep 28

6:10 am - 10:15 amGEG-ONT

4h 05m1 stop

5:50 am - 10:45 amONT-GEG

4h 55m1 stop

$175Southwest

Find Deal

Thu, Aug 28 - Mon, Sep 1

5:10 am - 11:20 amGEG-ONT

6h 10m1 stop

4:20 pm - 11:50 pmONT-GEG

7h 30m1 stop

$186Southwest

Find Deal

Sat, Oct 4 - Thu, Oct 9

2:45 pm - 8:33 pmBOI-ONT

6h 48m1 stop

6:50 pm - 11:34 pmONT-BOI

3h 44m1 stop

$197United Airlines

Find Deal

Mon, Aug 25 - Tue, Sep 2

12:22 pm - 7:54 pmBOI-ONT

8h 32m1 stop

8:59 pm - 11:37 amONT-BOI

13h 38m1 stop

$215Frontier

Find Deal

Fri, Sep 19 - Sat, Sep 20

7:23 am - 12:13 pmGEG-ONT

4h 50m1 stop

6:50 pm - 11:05 pmONT-GEG

4h 15m1 stop

$217United Airlines

Find Deal

Wed, Sep 17 - Sun, Sep 21

12:36 pm - 11:50 pmBOI-ONT

12h 14m1 stop

12:59 am - 11:38 amONT-BOI

9h 39m1 stop

$218Frontier

Find Deal

Sun, Aug 17 - Wed, Aug 20

5:06 am - 9:26 amGEG-ONT

4h 20m1 stop

7:10 am - 11:39 amONT-GEG

4h 29m1 stop

$234Hawaiian Airlines

Find Deal

Fri, Sep 26 - Fri, Oct 10

5:06 am - 9:26 amGEG-ONT

4h 20m1 stop

5:45 pm - 11:08 pmONT-GEG

5h 23m1 stop

$241Hawaiian Airlines

Find Deal

Tue, Sep 23 - Sat, Oct 11

Delta flights from Idaho to Ontario

Our best Delta deals on Idaho to Ontario flight tickets

Delta

Sep 26

BOI5:43 pmBoise Air Term. Gowen Fld

6h 59m

1 stop

ONT11:42 pmOntario

Sep 28

ONT6:00 amOntario

3h 34m

1 stop

BOI10:34 amBoise Air Term. Gowen Fld

$159

Find similar

Delta

Nov 13

GEG7:07 pmSpokane

4h 39m

1 stop

ONT11:46 pmOntario

Nov 17

ONT5:05 pmOntario

6h 34m

1 stop

GEG11:39 pmSpokane

$189

Find similar

Delta

Oct 2

BOI6:00 amBoise Air Term. Gowen Fld

3h 57m

1 stop

ONT8:57 amOntario

Oct 8

ONT6:37 amOntario

5h 43m

1 stop

BOI1:20 pmBoise Air Term. Gowen Fld

$209

Find similar

Southwest flights from Idaho to Ontario

Our best Southwest deals on Idaho to Ontario flight tickets

Southwest

Aug 28

GEG6:10 amSpokane

4h 05m

1 stop

ONT10:15 amOntario

Sep 1

ONT5:50 amOntario

4h 55m

1 stop

GEG10:45 amSpokane

$175

Find similar

Southwest

Oct 4

GEG5:10 amSpokane

6h 10m

1 stop

ONT11:20 amOntario

Oct 9

ONT4:20 pmOntario

7h 30m

1 stop

GEG11:50 pmSpokane

$186

Find similar

Southwest

Sep 18

BOI7:45 amBoise Air Term. Gowen Fld

3h 30m

1 stop

ONT10:15 amOntario

Sep 25

ONT5:05 pmOntario

6h 20m

1 stop

BOI12:25 amBoise Air Term. Gowen Fld

$187

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 1/16

4:30 pm-5:42 pm

Nonstop2h 12m

Ontario

Sat 1/31

6:22 pm-9:39 pm

Nonstop2h 17m

$147

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 9/26

5:43 pm-11:42 pm

1 stop6h 59m

Ontario

Sun 9/28

6:00 am-10:34 am

1 stop3h 34m

$159

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Thu 8/28

6:10 am-10:15 am

1 stop4h 05m

Ontario

Mon 9/1

5:50 am-10:45 am

1 stop4h 55m

$175

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Sat 10/4

5:10 am-11:20 am

1 stop6h 10m

Ontario

Thu 10/9

4:20 pm-11:50 pm

1 stop7h 30m

$186

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Mon 8/25

2:45 pm-8:33 pm

1 stop6h 48m

Ontario

Tue 9/2

6:50 pm-11:34 pm

1 stop3h 44m

$197

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 9/19

12:22 pm-7:54 pm

1 stop8h 32m

Ontario

Sat 9/20

8:59 pm-11:37 am

1 stop13h 38m

$215

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Wed 9/17

7:23 am-12:13 pm

1 stop4h 50m

Ontario

Sun 9/21

6:50 pm-11:05 pm

1 stop4h 15m

$217

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sun 8/17

12:36 pm-11:50 pm

1 stop12h 14m

Ontario

Wed 8/20

12:59 am-11:38 am

1 stop9h 39m

$218

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Fri 9/26

5:06 am-9:26 am

1 stop4h 20m

Ontario

Fri 10/10

7:10 am-11:39 am

1 stop4h 29m

$234

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Tue 9/23

5:06 am-9:26 am

1 stop4h 20m

Ontario

Sat 10/11

5:45 pm-11:08 pm

1 stop5h 23m

$241

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho to Ontario

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

Prices

Airlines

Other information

What is the cheapest month to fly to Ontario?

In general, August is the cheapest month to fly from Idaho to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $262. If you aren’t able to travel during the month of August, then book flights to Ontario from Idaho during September instead. Flights to Ontario in September, while not as cheap as those in August, still average around $303.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $284. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Idaho to Ontario for around $353.

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

In the afternoon is the cheapest time of day to fly from Idaho to Ontario when you can find flight prices for as low as $312. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $374 on average. Flights to Ontario from Idaho at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $330 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Idaho for as low as $175 on momondo.

Can stopping save me money on Idaho to Ontario flights?

You could potentially save up to 68% on your flight if you consider stops on a Idaho to Ontario flight.

Cheap Idaho to Ontario flight deals and tips

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

Best Price Found	$80
Fastest flight time	2h 12m
Direct flights	Thu, Fri, Sat and Sun
Airports in Ontario	1 airport

The best one-way flight to Ontario from Idaho in the past 72 hours is $80. The best round-trip flight deal from Idaho to Ontario found on momondo in the last 72 hours is $147.

The fastest flight from Idaho to Ontario takes 2h 12m

Direct flights go from Idaho to Ontario on Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is Alaska Airlines.

There is 1 airport near Ontario: Ontario (ONT)

Search flight deals

When did momondo last update prices for flights from Idaho to Ontario Airport?
Prices for flights from Idaho to Ontario Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Idaho to Ontario Airport?
As of August 2025, there are 4 operators available to choose from for flights from Idaho to Ontario Airport.
How old do you have to be to fly from Idaho to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Idaho to Ontario

Compare and see reviews for airlines that fly from Idaho to Ontario with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $156	Free Cancellation	Rating 8.0 7,985 reviews	Search Delta flights
Alaska Airlines	PriceFrom $201	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $233	Free Cancellation	Rating 7.4 8,917 reviews	Search United Airlines flights
Southwest	PriceFrom $240	Free Cancellation	Rating 8.0 4,247 reviews	Search Southwest flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho to Ontario for you.

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

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

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

Once all potential Idaho to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Ontario from Idaho are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.