HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$99+ Cheap flights from Boise to Ontario (BOI - ONT)

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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boise to Ontario 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.

Cheapflights Tip: The best prices from Boise Air Term. Gowen Fld to Ontario are usually found in September or August, booked 36 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Boise to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated junio 12, 2025.

Round-trip from

$199
(Delta)

One-way from

$99
(Alaska Airlines)

Popular in

November

Cheapest in

September

Average price

$326
From Boise Air Term. Gowen Fld to Ontario
Search Deals
One-way flight from Boise Air Term. Gowen Fld to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Boise to Ontario

Cheapest flights from Boise to Ontario
Explore the most affordable flight options available from Boise to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This Delta deal was found by Cheapflights users on 6/11. 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.
mié. 7/27:30 amBOI - ONT
1 stop7h 55mDelta
sáb. 7/55:08 pmONT - BOI
1 stop5h 05mDelta
Deal found 6/11$199
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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.
mié. 7/26:25 amBOI - ONT
1 stop5h 40mAlaska Airlines
sáb. 7/56:00 amONT - BOI
1 stop8h 04mAlaska Airlines
Deal found 6/9$219
This Hawaiian Airlines deal was found by Cheapflights users on 6/9. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/87:17 pmBOI - ONT
1 stop5h 42mHawaiian Airlines
dom. 9/143:04 pmONT - BOI
1 stop6h 36mHawaiian Airlines
Deal found 6/9$265
This Frontier deal was found by Cheapflights users on 6/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/1412:36 pmBOI - ONT
1 stop12h 14mFrontier
sáb. 8/1612:59 amONT - BOI
1 stop9h 47mFrontier
Deal found 6/9$281
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/257:07 pmBOI - ONT
1 stop4h 38mUnited Airlines
mar. 7/81:19 pmONT - BOI
1 stop4h 52mUnited Airlines
Deal found 6/10$333
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/315:00 amBOI - ONT
2 stops6h 25mSouthwest
dom. 8/36:15 amONT - BOI
1 stop3h 40mSouthwest
Deal found 6/12$369
This Orbitz deal was found by Cheapflights users on 6/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/106:30 amBOI - ONT
1 stop7h 07mMultiple Airlines
sáb. 10/1112:59 amONT - BOI
1 stop9h 54mMultiple Airlines
Deal found 6/10$378
This KAYAK deal was found by Cheapflights users on 6/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/166:52 amBOI - ONT
1 stop6h 08mAmerican Airlines
mar. 6/174:50 pmONT - BOI
1 stop5h 46mAmerican Airlines
Deal found 6/10$550

Cheapflights Fare Finder

Customize your flight search to find flights from Boise to Ontario 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 junio 12, 2025.
Use the filters below to find and compare flights from Boise to Ontario that are best for you.

Fly from

Boise

Fly to

Ontario

Route

Depart

Return

Price

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mié. 7/2

7:30 am-2:25 pm

1 stop7h 55m

Ontario

sáb. 7/5

5:08 pm-11:13 pm

1 stop5h 05m

$199

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mié. 7/2

6:25 am-11:05 am

1 stop5h 40m

Ontario

sáb. 7/5

6:00 am-3:04 pm

1 stop8h 04m

$219

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

lun. 9/8

7:17 pm-11:59 pm

1 stop5h 42m

Ontario

dom. 9/14

3:04 pm-10:40 pm

1 stop6h 36m

$265

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

jue. 8/14

12:36 pm-11:50 pm

1 stop12h 14m

Ontario

sáb. 8/16

12:59 am-11:46 am

1 stop9h 47m

$281

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mié. 6/25

7:07 pm-10:45 pm

1 stop4h 38m

Ontario

mar. 7/8

1:19 pm-7:11 pm

1 stop4h 52m

$333

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

jue. 7/31

5:00 am-10:25 am

2 stops6h 25m

Ontario

dom. 8/3

6:15 am-10:55 am

1 stop3h 40m

$369

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

vie. 10/10

6:30 am-12:37 pm

1 stop7h 07m

Ontario

sáb. 10/11

12:59 am-11:53 am

1 stop9h 54m

$378

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

vie. 10/10

8:09 am-5:53 pm

2 stops10h 44m

Ontario

dom. 10/12

10:33 am-10:56 pm

2 stops11h 23m

$2,726

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

dom. 8/31

6:35 am-10:44 am

1 stop5h 09m

$99

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

jue. 8/21

12:27 pm-8:45 am

1 stop21h 18m

$112

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 14 results
1
2

Best time to book a flight from Boise to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Boise 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 Boise to Ontario

How far ahead should I book a flight from Boise to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Boise to Ontario. Price data was last updated on June 9, 2025.

The best time to book flights from Boise to Ontario is 36 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Boise to Ontario (average of $246). Flying from Boise to Ontario in March is currently the most expensive (average of $328). 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 BOI to ONT?

Find hourly flight availability from Boise to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 17% on flights from Boise to Ontario by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Boise to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Boise to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Boise to Ontario flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated junio 12, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Boise to Ontario have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

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

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

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
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

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 Boise to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Boise to Ontario round-trip?

    According to our current data, Delta ($199), Alaska Airlines ($219), and Hawaiian Airlines ($265) offers the cheapest pricing from Boise to Ontario. Delta is 40% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airlines for a one-way flight from Boise to Ontario are Alaska Airlines ($99), Frontier ($112), and Delta ($126).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boise to Ontario 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 Boise to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Boise to Ontario (average of $246). Flying from Boise to Ontario in March is currently the most expensive (average of $328). 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 Boise to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Las Vegas flights
Boise to Los Angeles flights
Boise to San Diego flights
Spokane to San Diego flights
Boise to Santa Ana flights
Spokane to Los Angeles flights
Spokane to Las Vegas flights
Boise to San Francisco flights
Boise to Sacramento flights
Boise to Burbank flights
Spokane to Ontario flights
Spokane to San Francisco flights
Jackson to San Francisco flights
Boise to San Jose flights
Boise to Reno flights
Boise to Long Beach flights
Spokane to Sacramento flights
Idaho Falls to Las Vegas flights
Spokane to Santa Ana flights
Lewiston to Yuma flights
Spokane to Reno flights
Idaho Falls to Los Angeles flights
Spokane to Long Beach flights
Idaho Falls to Santa Ana flights
Boise to Oakland flights
Spokane to Medford flights
Spokane to San Jose flights
Spokane to Fresno flights
Jackson to Las Vegas flights
Spokane to Burbank flights
Idaho Falls to San Diego flights
Idaho Falls to Ontario flights
Boise to Santa Rosa flights
Idaho Falls to Sacramento flights
Jackson to Los Angeles flights
Boise to Medford flights
Idaho Falls to San Francisco flights
Hailey to San Francisco flights
Jackson to San Diego flights
Spokane to Palm Springs flights
Boise to Palm Springs flights
Spokane to San Luis Obispo flights
Boise to Fresno flights
Spokane to Oakland flights
Hailey to Los Angeles flights
Boise to Santa Barbara flights
Idaho Falls to San Jose flights
Twin Falls to Las Vegas flights
Idaho Falls to Oakland flights

Top 4 airlines flying from Boise to Ontario

Discover the top 4 airlines that operate flights from Boise to Ontario. 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$156Average$275FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$201Average$317FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$218Average$353FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$356FlexibilityNo cancel feeOn-time63%

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.