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$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
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Boise Air Term. Gowen Fld to Ontario are usually found in August or September, 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 julio 3, 2025.

Round-trip from

$217
(Hawaiian Airlines)

One-way from

$99
(Alaska Airlines)

Popular in

November

Cheapest in

August

Average price

$363
From Boise Air Term. Gowen Fld to Ontario
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One-way flight from Boise Air Term. Gowen Fld to Ontario
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Highest demand for flights based on searches. 4% potential increase in price ($14 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 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 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 julio 3, 2025.

This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/279:00 amBOI - ONT
1 stop6h 09mHawaiian Airlines
dom. 8/313:04 pmONT - BOI
1 stop6h 36mHawaiian Airlines
Deal found 7/1$217
This FlightHub deal was found by Cheapflights users on 7/2. 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.
jue. 9/1112:25 pmBOI - ONT
1 stop8h 29mFrontier
sáb. 9/138:59 pmONT - BOI
1 stop13h 41mFrontier
Deal found 7/2$222
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/171:57 pmBOI - ONT
1 stop22h 59mAmerican Airlines
mié. 9/246:10 amONT - BOI
1 stop6h 07mAmerican Airlines
Deal found 7/1$230
This Alaska Airlines deal was found by Cheapflights users on 7/3. 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.
jue. 10/26:35 amBOI - ONT
1 stop5h 09mAlaska Airlines
lun. 10/67:47 pmONT - BOI
1 stop14h 22mAlaska Airlines
Deal found 7/3$236
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. 9/175:45 amBOI - ONT
1 stop6h 24mDelta
dom. 9/216:00 amONT - BOI
1 stop3h 34mDelta
Deal found 6/30$244
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.
mié. 9/1712:20 pmBOI - ONT
2 stops6h 10mSouthwest
mié. 9/242:35 pmONT - BOI
2 stops6h 50mSouthwest
Deal found 7/1$247
This Orbitz 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/306:25 amBOI - ONT
1 stop8h 01mMultiple Airlines
sáb. 8/212:59 amONT - BOI
1 stop9h 47mMultiple Airlines
Deal found 7/1$273
This United Airlines deal was found by Cheapflights users on 7/2. 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.
jue. 7/317:15 pmBOI - ONT
1 stop4h 37mUnited Airlines
mié. 8/65:05 amONT - BOI
1 stop7h 24mUnited Airlines
Deal found 7/2$349

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 julio 3, 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. 8/27

9:00 am-2:09 pm

1 stop6h 09m

Ontario

dom. 8/31

3:04 pm-10:40 pm

1 stop6h 36m

$217

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

jue. 9/11

12:25 pm-7:54 pm

1 stop8h 29m

Ontario

sáb. 9/13

8:59 pm-11:40 am

1 stop13h 41m

$222

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mié. 9/17

1:57 pm-11:56 am

1 stop22h 59m

Ontario

mié. 9/24

6:10 am-1:17 pm

1 stop6h 07m

$230

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mié. 8/6

5:43 pm-12:15 am

1 stop7h 32m

Ontario

lun. 8/11

6:00 am-3:04 pm

1 stop8h 04m

$236

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mié. 9/17

5:45 am-11:09 am

1 stop6h 24m

Ontario

dom. 9/21

6:00 am-10:34 am

1 stop3h 34m

$244

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mié. 9/17

12:20 pm-5:30 pm

2 stops6h 10m

Ontario

mié. 9/24

2:35 pm-10:25 pm

2 stops6h 50m

$247

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mié. 7/30

6:25 am-1:26 pm

1 stop8h 01m

Ontario

sáb. 8/2

12:59 am-11:46 am

1 stop9h 47m

$273

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

jue. 7/31

7:15 pm-10:52 pm

1 stop4h 37m

Ontario

mié. 8/6

5:05 am-1:29 pm

1 stop7h 24m

$349

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

dom. 8/31

7:17 pm-11:59 pm

1 stop5h 42m

$99

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

dom. 8/17

12:36 pm-9:13 am

1 stop21h 37m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 16 results
1
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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 27, 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 julio 3, 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.

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 julio 3, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Boise to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
4,266 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
2,545 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

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 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, Hawaiian Airlines ($217), Frontier ($222), and American Airlines ($230) offers the cheapest pricing from Boise to Ontario. Hawaiian Airlines is 35% 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 ($114), and American Airlines ($117).

  • 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

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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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$156Average$279FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$201Average$319FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$218Average$364FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$363FlexibilityNo cancel feeOn-time63%

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