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$88+ Cheap flights from Ontario (ONT) to Idaho

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
jul. 6 — jul. 131
dom. 7/6
dom. 7/13
1 adult, Economy
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Cheap flight deals from Ontario to Idaho

Keep the following information in mind while searching for Ontario to Idaho flight deals. Data was last updated julio 1, 2025.

Round-trip from

$166
(Priceline)

One-way from

$88
(Priceline)

Popular in

December

Cheapest in

October

Average price

$275
From Ontario to Idaho
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One-way flight from Ontario to Idaho
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Highest demand for flights based on searches. 13% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Ontario to Idaho

Cheapest flights from Ontario to Idaho
Explore the most affordable flight options available from Ontario to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 1, 2025.

This Priceline deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/312:59 amONT - BOI
1 stop9h 41mFrontier
dom. 9/712:25 pmBOI - ONT
1 stop8h 29mFrontier
Deal found 6/29$166
This Frontier deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/1412:59 amONT - GEG
1 stop10h 07mFrontier
mar. 7/2211:51 amGEG - ONT
1 stop11h 59mFrontier
Deal found 6/30$215
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/1312:22 pmONT - BOI
1 stop6h 48mAmerican Airlines
mar. 8/191:50 pmBOI - ONT
1 stop22h 42mAmerican Airlines
Deal found 6/30$230
This Alaska Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/412:00 pmONT - GEG
1 stop5h 13mAlaska Airlines
lun. 8/117:42 pmGEG - ONT
1 stop4h 17mAlaska Airlines
Deal found 7/1$236
This Alaska Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/116:00 amONT - BOI
1 stop8h 04mAlaska Airlines
jue. 8/148:46 pmBOI - ONT
1 stop15h 19mAlaska Airlines
Deal found 6/30$236
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/94:55 pmONT - BOI
1 stop5h 10mSouthwest
lun. 8/115:45 amBOI - ONT
1 stop3h 30mSouthwest
Deal found 6/30$239
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/204:50 pmONT - SUN
1 stop4h 06mDelta
sáb. 8/237:30 amSUN - ONT
1 stop5h 44mDelta
Deal found 6/30$241
This Southwest deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/45:05 pmONT - GEG
1 stop6h 45mSouthwest
jue. 8/75:45 amGEG - ONT
2 stops6h 55mSouthwest
Deal found 7/1$242
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/35:09 pmONT - BOI
1 stop6h 00mDelta
mar. 8/512:50 pmBOI - ONT
1 stop4h 39mDelta
Deal found 6/29$244
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/95:59 pmONT - GEG
1 stop4h 49mDelta
dom. 8/175:45 amGEG - ONT
1 stop6h 29mDelta
Deal found 6/29$254
This Hawaiian Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/227:22 pmONT - GEG
1 stop4h 37mHawaiian Airlines
vie. 8/295:46 pmGEG - ONT
1 stop6h 13mHawaiian Airlines
Deal found 6/30$256
This Orbitz deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/1612:59 amONT - GEG
1 stop10h 04mMultiple Airlines
mié. 8/205:06 amGEG - ONT
1 stop4h 20mMultiple Airlines
Deal found 6/30$266

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Idaho 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, Cheapflights users made 2,558,603 searches. Data last updated julio 1, 2025.
Use the filters below to find and compare flights from Ontario to Idaho that are best for you.

Fly from

Ontario

Fly to

Idaho

Route

Depart

Return

Price

OntarioBoise

ONT - BOI

ONTBOI

Ontario

mié. 9/3

12:59 am-11:40 am

1 stop9h 41m

Boise Air Term. Gowen Fld

dom. 9/7

12:25 pm-7:54 pm

1 stop8h 29m

$166

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

lun. 7/14

12:59 am-11:06 am

1 stop10h 07m

Spokane

mar. 7/22

11:51 am-11:50 pm

1 stop11h 59m

$215

OntarioBoise

ONT - BOI

ONTBOI

Ontario

mié. 8/13

12:22 pm-8:10 pm

1 stop6h 48m

Boise Air Term. Gowen Fld

mar. 8/19

1:50 pm-11:32 am

1 stop22h 42m

$230

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

lun. 8/4

12:00 pm-5:13 pm

1 stop5h 13m

Spokane

lun. 8/11

7:42 pm-11:59 pm

1 stop4h 17m

$236

OntarioBoise

ONT - BOI

ONTBOI

Ontario

lun. 8/11

6:00 am-3:04 pm

1 stop8h 04m

Boise Air Term. Gowen Fld

jue. 8/14

8:46 pm-11:05 am

1 stop15h 19m

$236

OntarioBoise

ONT - BOI

ONTBOI

Ontario

sáb. 8/9

4:55 pm-11:05 pm

1 stop5h 10m

Boise Air Term. Gowen Fld

lun. 8/11

5:45 am-8:15 am

1 stop3h 30m

$239

OntarioHailey

ONT - SUN

ONTSUN

Ontario

mié. 8/20

4:50 pm-9:56 pm

1 stop4h 06m

Hailey Sun Valley-Friedman

sáb. 8/23

7:30 am-12:14 pm

1 stop5h 44m

$241

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

lun. 8/4

5:05 pm-11:50 pm

1 stop6h 45m

Spokane

jue. 8/7

5:45 am-12:40 pm

2 stops6h 55m

$242

OntarioBoise

ONT - BOI

ONTBOI

Ontario

dom. 8/3

5:09 pm-12:09 am

1 stop6h 00m

Boise Air Term. Gowen Fld

mar. 8/5

12:50 pm-4:29 pm

1 stop4h 39m

$244

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

sáb. 8/9

5:59 pm-10:48 pm

1 stop4h 49m

Spokane

dom. 8/17

5:45 am-12:14 pm

1 stop6h 29m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 59 results
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Best time to book a flight from Ontario to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Idaho

What is the cheapest month to book a flight from Ontario to Idaho?

Currently, October is the cheapest month in which you can book a flight from Ontario to Idaho (average of $314). Flying from Ontario to Idaho in June is currently the most expensive (average of $398). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to ID?

Find hourly flight availability from Ontario to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Idaho as you normally would.

How much does it cost to fly round-trip from Ontario to Idaho?

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated julio 1, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Ontario to Idaho have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,974 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,538 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,858 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Idaho?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Idaho from Ontario.

  • What are the cheapest airlines to fly from Ontario to Idaho one-way?

    The cheapest airlines for a one-way flight from Ontario to Idaho are Frontier ($88), Hawaiian Airlines ($99), and Alaska Airlines ($99).

  • What are the most popular routes from Ontario to Idaho?

    The most popular flight routes from Ontario to Idaho are Ontario - Boise Air Term. Gowen Fld, Ontario - Spokane and Ontario - Jackson Hole.

  • Can I find deals for flights from Ontario to Idaho that include hotel bookings?

    Yes. In addition to deals on Ontario to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Idaho.

  • Can I find deals for business class flights from Ontario to Idaho?

    Yes. Cheapflights offers flight deals from Ontario to Idaho by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Idaho?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Idaho (average of $314). Flying from Ontario to Idaho in June is currently the most expensive (average of $398). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ontario to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to Idaho

Discover the top 5 airlines that operate flights from Ontario to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated julio 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$177Average$285FlexibilityNo cancel feeOn-time75%
DeltaCheapest$183Average$382FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$218Average$516FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$233Average$365FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$346FlexibilityNo cancel feeOn-time63%

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