Idaho

$76+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Apr 11 — Apr 181
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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 March 12, 2026.

This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Tue 4/146:25 pm
ONT
-
BOI
Nonstop2h 01m
Alaska Airlines
Sat 4/184:40 pm
BOI
-
ONT
Nonstop2h 05m
Alaska Airlines
Deal found 3/9$137
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 4/156:25 pm
ONT
-
BOI
Nonstop2h 01m
Alaska Airlines
Sat 4/184:40 pm
BOI
-
ONT
Nonstop2h 05m
Alaska Airlines
Deal found 3/9$147
This Delta deal was found by Cheapflights users on 3/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:55 pm
ONT
-
BOI
1 stop5h 22m
Delta
Wed 5/138:45 am
BOI
-
ONT
1 stop4h 34m
Delta
Deal found 3/11$151
This Southwest deal was found by Cheapflights users on 3/11. 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.
Wed 5/63:45 pm
ONT
-
BOI
2 stops7h 40m
Southwest
Wed 5/135:15 pm
BOI
-
ONT
1 stop5h 55m
Southwest
Deal found 3/11$156
This Southwest deal was found by Cheapflights users on 3/10. 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.
Wed 4/153:45 pm
ONT
-
BOI
1 stop6h 35m
Southwest
Sat 4/188:50 am
BOI
-
ONT
1 stop4h 25m
Southwest
Deal found 3/10$157
This Expedia deal was found by Cheapflights users on 3/8. 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 4/1512:59 am
ONT
-
GEG
1 stop9h 50m
Frontier
Thu 4/2311:44 am
GEG
-
ONT
1 stop19h 47m
Frontier
Deal found 3/8$160
This Delta deal was found by Cheapflights users on 3/9. 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 5/911:52 am
ONT
-
GEG
1 stop6h 51m
Delta
Wed 5/134:15 pm
GEG
-
ONT
1 stop6h 19m
Delta
Deal found 3/9$167
This Southwest deal was found by Cheapflights users on 3/10. 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.
Sat 4/116:45 am
ONT
-
BOI
1 stop7h 05m
Southwest
Sat 4/183:25 pm
BOI
-
ONT
2 stops6h 20m
Southwest
Deal found 3/10$168
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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.
Fri 5/17:59 pm
ONT
-
BOI
1 stop16h 53m
Alaska Airlines
Sat 5/164:14 pm
BOI
-
ONT
Nonstop2h 03m
Alaska Airlines
Deal found 3/8$171
This Delta deal was found by Cheapflights users on 3/9. 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 5/911:52 am
ONT
-
GEG
1 stop6h 51m
Delta
Tue 5/125:00 am
GEG
-
ONT
2 stops7h 19m
Delta
Deal found 3/9$172
This Southwest deal was found by Cheapflights users on 3/11. 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.
Fri 4/245:05 pm
ONT
-
BOI
1 stop6h 40m
Southwest
Tue 4/282:00 pm
BOI
-
ONT
1 stop6h 35m
Southwest
Deal found 3/11$174
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Tue 4/146:25 pm
ONT
-
BOI
Nonstop2h 01m
Alaska Airlines
Wed 4/221:15 pm
BOI
-
ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/9$177

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 March 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$137
(Alaska Airlines)

One-way from

$76
(Southwest)

Popular in

February

Cheapest in

April

Average price

$341

Good round-trip deal

$157 or less
Provider with most accurate pricing for Los Angeles Los Angeles-Boise Air Term. Gowen Fld flight deals.
Provider most trusted by Cheapflights users for Los Angeles Los Angeles-Boise Air Term. Gowen Fld flights.
From Ontario to Idaho
One-way flight from Ontario to Idaho
Highest demand for flights based on searches. 8% potential increase in price ($25 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Average for round-trip flights in March 2026
Price to beat on a round-trip flight from Ontario to Idaho.

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 March 12, 2026.
Use the filters below to find and compare flights from Ontario to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 4/15

6:25 pm-9:26 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sat 4/18

4:40 pm-5:45 pm

Nonstop2h 05m

$147

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Fri 5/1

2:20 pm-9:02 pm

1 stop6h 42m

Spokane

Mon 5/4

6:15 am-11:13 am

1 stop4h 58m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 4/14

7:00 am-4:14 pm

1 stop8h 14m

Boise Air Term. Gowen Fld

Sat 4/18

5:40 am-11:13 am

1 stop6h 33m

$167
Quickest round-trip

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 5/14

7:48 pm-10:47 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Mon 5/18

4:14 pm-5:17 pm

Nonstop2h 03m

$177

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 4/16

6:25 pm-9:26 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Wed 4/22

1:15 pm-2:19 pm

Nonstop2h 04m

$197

OntarioLewiston

ONT - LWS

ONTLWS

Ontario

Thu 4/16

5:55 pm-12:08 am

1 stop6h 13m

Lewiston Nez Perce Rgnl

Sat 4/25

6:09 am-4:25 pm

2 stops10h 16m

$220

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Wed 5/13

1:29 pm-11:59 pm

2 stops10h 30m

Spokane

Sun 5/17

7:23 pm-11:12 am

1 stop15h 49m

$231

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Tue 4/21

6:00 am-11:10 pm

1 stop17h 10m

Spokane

Sat 4/25

5:00 am-10:32 pm

1 stop17h 32m

$245

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Tue 5/12

6:45 am-12:13 pm

1 stop5h 28m

Spokane

Tue 5/12

7:23 pm-11:12 am

1 stop15h 49m

$247

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 5/8

7:59 pm-9:42 am

1 stop12h 43m

Boise Air Term. Gowen Fld

Mon 5/11

1:15 pm-2:19 pm

Nonstop2h 04m

$251

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 60 resultsSorted by cheapest first
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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, 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 March 12, 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.

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 March 12, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, andDelta 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.

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

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 2h 01m. The time it takes to get you to your destination can typically vary by up to 5h 24m. 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?

  • What are the cheapest flights from Ontario to Idaho?

    Looking at all options, your cheapest flight can be booked for $137. While the most popular route (Ontario - Boise Air Term. Gowen Fld) can be booked for $162 on average, our data indicates $227 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

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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 March 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$137Average$239FlexibilityNo cancel feeOn-time75%
DeltaCheapest$153Average$341FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$196Average$315FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$220Average$353FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$227Average$516FlexibilityNo cancel feeOn-time71%

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