HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$67+ 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 January 20, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/20. 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.
Wed 2/257:59 pm
ONT
-
BOI
Nonstop1h 59m
Alaska Airlines
Sat 2/285:50 pm
BOI
-
ONT
Nonstop2h 07m
Alaska Airlines
Deal found 1/20$117
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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.
Sat 2/147:37 pm
ONT
-
BOI
Nonstop1h 59m
Alaska Airlines
Wed 2/186:07 pm
BOI
-
ONT
Nonstop2h 07m
Alaska Airlines
Deal found 1/19$137
This Expedia deal was found by Cheapflights users on 1/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/207:37 pm
ONT
-
BOI
Nonstop1h 59m
Alaska Airlines
Tue 2/246:07 pm
BOI
-
ONT
Nonstop2h 07m
Alaska Airlines
Deal found 1/18$147
This Southwest deal was found by Cheapflights users on 1/18. 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.
Tue 2/1011:15 am
ONT
-
BOI
1 stop4h 35m
Southwest
Wed 2/1110:45 am
BOI
-
ONT
1 stop5h 10m
Southwest
Deal found 1/18$151
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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.
Sat 2/287:37 pm
ONT
-
BOI
Nonstop1h 59m
Alaska Airlines
Tue 3/36:28 am
BOI
-
ONT
1 stop5h 40m
Alaska Airlines
Deal found 1/20$162
This Expedia deal was found by Cheapflights users on 1/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/286:00 am
ONT
-
BOI
1 stop28h 11m
Multiple Airlines
Sat 3/75:50 pm
BOI
-
ONT
Nonstop2h 07m
Multiple Airlines
Deal found 1/18$164
This Expedia deal was found by Cheapflights users on 1/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:30 am
ONT
-
BOI
1 stop27h 21m
Multiple Airlines
Wed 2/256:07 pm
BOI
-
ONT
Nonstop2h 07m
Multiple Airlines
Deal found 1/19$168
This Southwest deal was found by Cheapflights users on 1/18. 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.
Fri 2/207:15 pm
ONT
-
BOI
1 stop4h 45m
Southwest
Tue 2/2411:50 am
BOI
-
ONT
1 stop6h 20m
Southwest
Deal found 1/18$169
This Orbitz deal was found by Cheapflights users on 1/20. 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.
Tue 4/146:00 am
ONT
-
BOI
1 stop6h 58m
Alaska Airlines
Sat 4/184:40 pm
BOI
-
ONT
Nonstop2h 05m
Alaska Airlines
Deal found 1/20$171
This Alaska Airlines deal was found by Cheapflights users on 1/18. 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.
Thu 2/197:37 pm
ONT
-
BOI
Nonstop1h 59m
Alaska Airlines
Mon 2/235:50 pm
BOI
-
ONT
Nonstop2h 07m
Alaska Airlines
Deal found 1/18$177
This Delta deal was found by Cheapflights users on 1/20. 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.
Fri 5/111:53 am
ONT
-
BOI
1 stop8h 32m
Delta
Sat 5/165:45 pm
BOI
-
ONT
1 stop4h 59m
Delta
Deal found 1/20$183
This Delta deal was found by Cheapflights users on 1/19. 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.
Sat 2/143:30 pm
ONT
-
GEG
1 stop7h 12m
Delta
Tue 2/175:45 am
GEG
-
ONT
1 stop6h 22m
Delta
Deal found 1/19$197

Find flight deals from Ontario to Idaho

Keep the following information in mind while searching for Ontario to Idaho flight deals. Data was last updated January 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$117
(Alaska Airlines)

One-way from

$67
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$267

Good round-trip deal

$157 or less

Good one-way deal

$108 or less
Provider with most accurate pricing for Los Angeles-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Boise Air Term. Gowen Fld flights.
Search Deals
From Ontario to Idaho
Search Deals
One-way flight from Ontario to Idaho
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Idaho.
Search Deals
Price to beat on a one-way flight from Ontario to Idaho.
Search Deals

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 January 20, 2026.
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

Sat 3/7

7:37 pm-10:36 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Tue 3/10

6:07 pm-7:14 pm

Nonstop2h 07m

$117

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 2/14

7:37 pm-10:36 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Wed 2/18

6:07 pm-7:14 pm

Nonstop2h 07m

$137

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 4/4

6:25 pm-9:26 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Wed 4/8

4:40 pm-5:45 pm

Nonstop2h 05m

$137

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 4/2

6:25 pm-9:26 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Tue 4/7

4:40 pm-5:45 pm

Nonstop2h 05m

$147

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Mon 3/2

7:37 pm-10:36 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Sat 3/7

5:50 pm-6:57 pm

Nonstop2h 07m

$147

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 3/6

5:00 pm-11:05 pm

1 stop5h 05m

Boise Air Term. Gowen Fld

Tue 3/10

8:00 am-12:23 pm

1 stop5h 23m

$162

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 2/17

7:59 pm-10:58 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Tue 2/24

6:07 pm-7:14 pm

Nonstop2h 07m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 2/11

3:30 pm-9:58 pm

1 stop5h 28m

Boise Air Term. Gowen Fld

Sun 2/15

6:35 pm-9:44 pm

1 stop4h 09m

$183

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 4/1

5:09 pm-10:11 pm

1 stop4h 02m

Boise Air Term. Gowen Fld

Mon 4/6

6:15 pm-11:51 pm

1 stop6h 36m

$183

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 2/28

3:30 pm-9:56 pm

1 stop5h 26m

Boise Air Term. Gowen Fld

Sat 3/7

5:15 pm-10:37 pm

1 stop6h 22m

$183

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/17

Showing 1-10 of 60 results
1
2
3
...
6

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, November is the cheapest month in which you can book a flight from Ontario to Idaho (average of $60). Flying from Ontario to Idaho in December is currently the most expensive (average of $159). 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 January 20, 2026.

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.

Weekly flight availability from Ontario to Idaho

Explore weekly flight availability from Ontario to Idaho. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 20, 2026.

The most flights from ONT to USID are scheduled on a Saturday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

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 January 20, 2026.
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
11,760 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,760 reviews
Alaska Airlines
8.0
Very good
11,760 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,267 reviews
Alaska Airlines
8.0
Very good
11,760 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,076 reviews
Alaska Airlines
8.0
Very good
11,760 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,180 reviews
Alaska Airlines
8.0
Very good
11,760 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
American Airlines
7.2
Good
11,164 reviews
Alaska Airlines
8.0
Very good
11,760 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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.

  • How long is the flight from Ontario to Idaho?

    Airlines like Alaska Airlines, Delta, and United Airlines fly from Ontario to Idaho in about 1h 59m. The time it takes to get you to your destination can typically vary by up to 5h 39m. There are 661 mi between Ontario and Idaho. This flight may include one or multiple stops.

  • 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 Alaska Airlines ($69), Delta ($88), and United Airlines ($98).

  • 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.

  • What are the most reliable airlines from Ontario to Idaho?

    No one likes to see their flight delayed. When booking a flight from Ontario to Idaho consider choosing Sun Country Air (100%), Alaska Airlines (63%) or Horizon Air (63%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Ontario to Idaho?

    Looking at all options, your cheapest flight can be booked for $97. While the most popular route (Ontario - Boise Air Term. Gowen Fld) can be booked for $151 on average, our data indicates $163 when flying 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, November is the cheapest month in which you can book a flight from Ontario to Idaho (average of $60). Flying from Ontario to Idaho in December is currently the most expensive (average of $159). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Seattle flights
Los Angeles to John F Kennedy Intl flights
Los Angeles to Honolulu flights
San Francisco to Las Vegas flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Newark flights
San Francisco to Newark flights
San Francisco to Honolulu flights
Ontario to Seattle flights
Los Angeles to Las Vegas flights
Los Angeles to LaGuardia flights
San Francisco to Los Angeles flights
San Francisco to Ontario flights
Los Angeles to Orlando flights
Los Angeles to Miami flights
Los Angeles to Hobby flights
Los Angeles to San Francisco flights
Los Angeles to Dallas/Fort Worth flights
Burbank to Las Vegas flights
Santa Ana to Seattle flights
San Francisco to Sky Harbor Intl flights
Ontario to San Francisco flights
San Francisco to Seattle flights
Los Angeles to O'Hare Intl flights
Los Angeles to Denver flights
Santa Ana to Las Vegas flights
San Jose to Los Angeles flights
San Francisco to Dallas/Fort Worth flights
San Francisco to O'Hare Intl flights
Los Angeles to Sky Harbor Intl flights
Los Angeles to Kahului flights
Los Angeles to George Bush Intcntl flights
San Francisco to LaGuardia flights
San Francisco to Santa Ana flights
San Diego to Seattle flights
Santa Ana to San Francisco flights
San Francisco to Denver flights
San Jose to Las Vegas flights
Los Angeles to Salt Lake City flights
Los Angeles to Fort Lauderdale flights
Los Angeles to New Orleans flights
Los Angeles to San Jose flights
San Francisco to Miami flights
Los Angeles to Reagan-National flights
San Francisco to Kahului flights
Los Angeles to Atlanta flights
San Francisco to Orlando flights
Los Angeles to Austin flights
San Diego to Las Vegas flights
San Francisco to San Diego flights

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 January 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$137Average$244FlexibilityNo cancel feeOn-time75%
DeltaCheapest$158Average$358FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$196Average$315FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$220Average$345FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$227Average$516FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.