Idaho

$78+ 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
ago. 19 — ago. 261
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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 agosto 14, 2025.

Round-trip from

$145
(Priceline)

One-way from

$80
(Trip.com)

Popular in

December

Cheapest in

October

Average price

$299
From Ontario to Idaho
One-way flight from Ontario to Idaho
Highest demand for flights based on searches. 10% potential increase in price ($33 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Average for round-trip flights in August 2025

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 agosto 14, 2025.

This Priceline deal was found by Cheapflights users on 8/14. 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. 8/2712:59 amONT - GEG
1 stop9h 58mFrontier
jue. 9/411:53 amGEG - ONT
1 stop8h 01mFrontier
Deal found 8/14$145
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/116:00 amONT - BOI
1 stop6h 21mMultiple Airlines
jue. 9/182:16 pmBOI - ONT
1 stop7h 40mMultiple Airlines
Deal found 8/14$164
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/256:00 amONT - BOI
1 stop6h 21mMultiple Airlines
lun. 9/299:26 pmBOI - ONT
1 stop25h 30mMultiple Airlines
Deal found 8/14$167
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/512:59 amONT - BOI
1 stop9h 44mFrontier
dom. 11/912:53 pmBOI - ONT
1 stop11h 57mFrontier
Deal found 8/14$171
This Orbitz deal was found by Cheapflights users on 8/13. 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. 8/2312:59 amONT - GEG
1 stop10h 08mFrontier
jue. 8/2811:52 amGEG - ONT
1 stop11h 58mFrontier
Deal found 8/13$187
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/2610:28 pmONT - BOI
1 stop13h 53mMultiple Airlines
lun. 9/299:26 pmBOI - ONT
1 stop25h 30mMultiple Airlines
Deal found 8/14$190
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/256:00 amONT - GEG
1 stop14h 16mMultiple Airlines
dom. 10/59:08 pmGEG - ONT
1 stop10h 09mMultiple Airlines
Deal found 8/14$197
This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
mar. 11/44:11 pmONT - GEG
1 stop5h 03mAlaska Airlines
mié. 11/125:51 amGEG - ONT
1 stop5h 14mAlaska Airlines
Deal found 8/14$208
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/257:30 pmONT - IDA
1 stop19h 35mMultiple Airlines
lun. 9/299:39 pmIDA - ONT
1 stop25h 17mMultiple Airlines
Deal found 8/13$208
This Delta deal was found by Cheapflights users on 8/12. 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. 9/106:00 amONT - GEG
1 stop4h 34mDelta
mar. 9/167:05 pmGEG - ONT
1 stop4h 37mDelta
Deal found 8/12$209
This Southwest deal was found by Cheapflights users on 8/11. 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.
mié. 9/101:55 pmONT - GEG
2 stops8h 10mSouthwest
mié. 9/176:15 amGEG - ONT
1 stop4h 05mSouthwest
Deal found 8/11$214
This Delta deal was found by Cheapflights users on 8/13. 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. 9/311:40 amONT - BOI
1 stop5h 36mDelta
lun. 9/86:00 pmBOI - ONT
1 stop5h 40mDelta
Deal found 8/13$219

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 agosto 14, 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

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

mié. 8/27

12:59 am-10:57 am

1 stop9h 58m

Spokane

jue. 9/4

11:53 am-7:54 pm

1 stop8h 01m

$145

OntarioBoise

ONT - BOI

ONTBOI

Ontario

jue. 9/11

6:00 am-1:21 pm

1 stop6h 21m

Boise Air Term. Gowen Fld

jue. 9/18

2:16 pm-8:56 pm

1 stop7h 40m

$164

OntarioBoise

ONT - BOI

ONTBOI

Ontario

jue. 10/2

6:00 am-1:21 pm

1 stop6h 21m

Boise Air Term. Gowen Fld

sáb. 10/4

2:16 pm-9:56 pm

1 stop8h 40m

$164

OntarioBoise

ONT - BOI

ONTBOI

Ontario

jue. 10/16

6:05 am-1:30 pm

1 stop6h 25m

Boise Air Term. Gowen Fld

lun. 10/20

8:58 pm-8:42 pm

1 stop24h 44m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

jue. 9/11

6:00 am-1:21 pm

1 stop6h 21m

Boise Air Term. Gowen Fld

dom. 9/14

2:16 pm-7:17 am

1 stop18h 01m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

jue. 9/25

6:00 am-1:21 pm

1 stop6h 21m

Boise Air Term. Gowen Fld

lun. 9/29

9:26 pm-9:56 pm

1 stop25h 30m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

mié. 11/5

12:59 am-11:43 am

1 stop9h 44m

Boise Air Term. Gowen Fld

dom. 11/9

12:53 pm-11:50 pm

1 stop11h 57m

$171

OntarioBoise

ONT - BOI

ONTBOI

Ontario

vie. 9/26

10:28 pm-1:21 pm

1 stop13h 53m

Boise Air Term. Gowen Fld

lun. 9/29

9:26 pm-9:56 pm

1 stop25h 30m

$190

OntarioBoise

ONT - BOI

ONTBOI

Ontario

vie. 9/5

10:28 pm-1:21 pm

1 stop13h 53m

Boise Air Term. Gowen Fld

dom. 9/7

2:16 pm-7:17 am

1 stop18h 01m

$190

OntarioBoise

ONT - BOI

ONTBOI

Ontario

vie. 9/26

7:30 pm-1:21 pm

1 stop16h 51m

Boise Air Term. Gowen Fld

dom. 9/28

2:16 pm-7:17 am

1 stop18h 01m

$190

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 60 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 $399). 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 agosto 14, 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.

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 agosto 14, 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.

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
8.0
Very good

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

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 ($82), Alaska Airlines ($139), and United Airlines ($156).

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

  • 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 $399). 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.

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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$169Average$352FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$178Average$280FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$218Average$516FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$238Average$353FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$348FlexibilityNo cancel feeOn-time63%

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