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

Currently priced at $169, Delta will fly you from Ontario to Boise and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Alaska Airlines and American Airlines - these airlines can fly you to your destination from $178 and $218, respectively. Users have found that Delta is 47% cheaper than the other options available to this destination.

In terms of precipitation, rainfall in Boise ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Boise when rainfall is around 0.2 in.

If weather is an important factor for your trip to Boise, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

What are the most popular airlines that fly from Ontario to Boise?

American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from Ontario to Boise.

What is the cheapest day to fly round-trip from Ontario to Boise?

Departing on a Wednesday is a good option for securing a great price. You can expect to save up to 14% when planning your travel around this day of the week.

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

Travelers have found it’s best to book a flight 44 days in advance to save up to 150% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 44 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Ontario to Boise 1-2 weeks in advance for as low as $387, or $477 for flights within the next 24 hours.

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

Our data shows that October tends to be the cheapest month to fly to Boise from Ontario. Users have commonly found prices around $280 for the month, but tickets can be as low as $118. Due to multiple factors, prepare for potentially higher prices in December.

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

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

How can I find direct flights from Ontario to Boise?

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

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

Yes. Cheapflights offers flight deals from Ontario to Boise by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$78+ Flights from Ontario to Boise

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1. Tell us where you want to go

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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.

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Cheapflights Tip: The best prices from Ontario to Boise Air Term. Gowen Fld are usually found in January or September, booked 38 days in advance, depart on a Thursday or Saturday and return on a Tuesday

Cheap flight deals from Ontario to Boise

Round-trip from	$164 (Kiwi.com)
One-way from	$80 (Trip.com)
Popular in	December
Cheapest in	January
Average price	$338

From Ontario to Boise Air Term. Gowen Fld

Search Deals

One-way flight from Ontario to Boise Air Term. Gowen Fld

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. 2% potential price decrease ($9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Ontario to Boise

Cheapest flights from Ontario to Boise
Explore the most affordable flight options available from Ontario to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.

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

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

mié. 11/512:59 amONT - BOI

1 stop9h 44mFrontier

dom. 11/912:53 pmBOI - ONT

1 stop11h 57mFrontier

Deal found 8/14

$171

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

mié. 9/311:40 amONT - BOI

1 stop5h 36mDelta

lun. 9/86:00 pmBOI - ONT

1 stop5h 40mDelta

Deal found 8/13

$219

sáb. 9/68:59 pmONT - BOI

1 stop13h 38mFrontier

dom. 9/712:22 pmBOI - ONT

1 stop20h 01mFrontier

Deal found 8/14

$220

dom. 10/266:05 amONT - BOI

1 stop6h 25mMultiple Airlines

lun. 10/278:58 pmBOI - ONT

1 stop24h 44mMultiple Airlines

Deal found 8/14

$223

mié. 9/32:10 pmONT - BOI

2 stops7h 00mSouthwest

lun. 9/811:00 amBOI - ONT

1 stop4h 30mSouthwest

Deal found 8/13

$224

mié. 9/36:00 amONT - BOI

1 stop6h 06mDelta

dom. 9/76:00 amBOI - ONT

1 stop3h 55mDelta

Deal found 8/13

$228

vie. 9/56:00 amONT - BOI

1 stop6h 06mDelta

mar. 9/96:00 amBOI - ONT

1 stop3h 55mDelta

Deal found 8/14

$232

jue. 9/46:00 amONT - BOI

1 stop6h 06mDelta

lun. 9/86:00 pmBOI - ONT

1 stop5h 40mDelta

Deal found 8/13

$233

Best flights from Ontario to Boise
Discover carefully curated flight deals from Ontario to Boise that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated agosto 14, 2025.

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

mié. 11/512:59 amONT - BOI

1 stop9h 44mFrontier

dom. 11/912:53 pmBOI - ONT

1 stop11h 57mFrontier

Deal found 8/14

$171

jue. 10/26:00 amONT - BOI

1 stop6h 21mMultiple Airlines

sáb. 10/42:16 pmBOI - ONT

1 stop8h 40mMultiple Airlines

Deal found 8/14

$164

jue. 10/166:05 amONT - BOI

1 stop6h 25mMultiple Airlines

lun. 10/208:58 pmBOI - ONT

1 stop24h 44mMultiple Airlines

Deal found 8/14

$167

jue. 9/116:00 amONT - BOI

1 stop6h 21mMultiple Airlines

dom. 9/142:16 pmBOI - ONT

1 stop18h 01mMultiple Airlines

Deal found 8/12

$167

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

vie. 9/2610:28 pmONT - BOI

1 stop13h 53mMultiple Airlines

lun. 9/299:26 pmBOI - ONT

1 stop25h 30mMultiple Airlines

Deal found 8/13

$190

vie. 9/510:28 pmONT - BOI

1 stop13h 53mMultiple Airlines

dom. 9/72:16 pmBOI - ONT

1 stop18h 01mMultiple Airlines

Deal found 8/12

$190

vie. 9/267:30 pmONT - BOI

1 stop16h 51mMultiple Airlines

dom. 9/282:16 pmBOI - ONT

1 stop18h 01mMultiple Airlines

Deal found 8/13

$190

vie. 9/1210:28 pmONT - BOI

1 stop13h 53mMultiple Airlines

vie. 9/199:26 pmBOI - ONT

1 stop16h 17mMultiple Airlines

Deal found 8/13

$190

Last-minute flights from Ontario to Boise
Discover last-minute flight deals from Ontario to Boise. Data last updated agosto 14, 2025 and is based on user searches.

mié. 8/206:50 pmONT - BOI

1 stop3h 44mUnited Airlines

mié. 9/37:00 amBOI - ONT

1 stop6h 32mUnited Airlines

Deal found 8/14

$509

mié. 8/206:50 pmONT - BOI

1 stop3h 44mUnited Airlines

mié. 8/277:00 amBOI - ONT

1 stop6h 32mUnited Airlines

Deal found 8/14

$551

jue. 8/216:00 amONT - BOI

1 stop6h 48mHawaiian Airlines

lun. 8/258:31 pmBOI - ONT

1 stop4h 22mHawaiian Airlines

Deal found 8/13

$576

sáb. 8/237:10 amONT - BOI

1 stop4h 40mHawaiian Airlines

sáb. 8/232:28 pmBOI - ONT

1 stop5h 00mHawaiian Airlines

Deal found 8/14

$831

sáb. 8/237:10 amONT - BOI

1 stop4h 40mAlaska Airlines

sáb. 8/234:34 pmBOI - ONT

1 stop19h 10mAlaska Airlines

Deal found 8/14

$1,065

mié. 9/311:40 amONT - BOI

1 stop5h 36mDelta

lun. 9/86:00 pmBOI - ONT

1 stop5h 40mDelta

Deal found 8/13

$219

mié. 9/32:10 pmONT - BOI

2 stops7h 00mSouthwest

lun. 9/811:00 amBOI - ONT

1 stop4h 30mSouthwest

Deal found 8/13

$224

mié. 9/36:00 amONT - BOI

1 stop6h 06mDelta

dom. 9/76:00 amBOI - ONT

1 stop3h 55mDelta

Deal found 8/13

$228

jue. 9/46:00 amONT - BOI

1 stop6h 06mDelta

lun. 9/86:00 pmBOI - ONT

1 stop5h 40mDelta

Deal found 8/13

$233

jue. 9/411:40 amONT - BOI

1 stop7h 40mDelta

dom. 9/76:00 amBOI - ONT

1 stop3h 55mDelta

Deal found 8/14

$242

vie. 9/56:00 amONT - BOI

1 stop6h 06mDelta

mar. 9/96:00 amBOI - ONT

1 stop3h 55mDelta

Deal found 8/14

$232

sáb. 9/68:59 pmONT - BOI

1 stop13h 38mFrontier

dom. 9/712:22 pmBOI - ONT

1 stop20h 01mFrontier

Deal found 8/14

$220

One-way flights from Ontario to Boise
Search for one-way flight options from Ontario to Boise. Find affordable one-way fares based on user searches. Data last updated agosto 14, 2025.

jue. 10/26:00 amONT - BOI

1 stop6h 21mMultiple Airlines

Deal found 8/13

$80

mié. 10/2912:59 amONT - BOI

1 stop9h 44mFrontier

Deal found 8/13

$82

mié. 9/248:59 pmONT - BOI

1 stop13h 38mFrontier

Deal found 8/14

$84

sáb. 9/138:59 pmONT - BOI

1 stop13h 38mFrontier

Deal found 8/14

$86

lun. 9/82:45 pmONT - BOI

1 stop4h 46mMultiple Airlines

Deal found 8/13

$87

mié. 10/226:53 amONT - BOI

1 stop27h 50mFrontier

Deal found 8/13

$88

mar. 10/288:00 amONT - BOI

1 stop14h 49mMultiple Airlines

Deal found 8/13

$100

mié. 8/2012:59 amONT - BOI

1 stop9h 39mFrontier

Deal found 8/14

$101

mar. 9/92:55 pmONT - BOI

2 stops6h 30mSouthwest

Deal found 8/12

$108

dom. 9/710:28 pmONT - BOI

1 stop21h 03mMultiple Airlines

Deal found 8/13

$109

sáb. 10/181:37 pmONT - BOI

1 stop8h 38mMultiple Airlines

Deal found 8/12

$110

Fly from

Fly to

Route

Depart

Return

Price

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

OntarioBoise

ONT - BOI

ONTBOI

Ontario

vie. 9/12

10:28 pm-1:21 pm

1 stop13h 53m

Boise Air Term. Gowen Fld

vie. 9/19

9:26 pm-12:43 pm

1 stop16h 17m

$190

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 17 results

Best time to book a flight from Ontario to Boise

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

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

The best time to book flights from Ontario to Boise is 38 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 Ontario to Boise?

Currently, October is the cheapest month in which you can book a flight from Ontario to Boise (average of $314). Flying from Ontario to Boise 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 BOI?

It’s typically best to fly out from Ontario to Boise in the evening. Doing so could potentially save you 19% on the flight price compared to flying at noon, which is usually more expensive.

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

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

What’s the top layover airport for flights from Ontario to Boise?

Seattle (SEA) – chosen by Cheapflights users on 44% of 1-stop itineraries from Ontario to Boise on Cheapflights.

What’s the cheapest layover airport for flights from Ontario to Boise?

Oakland (OAK) is the most affordable 1-stop option, with an average round-trip price of $252.

What’s the fastest layover option from Ontario to Boise?

Flights via Las Vegas (LAS) have the shortest average one-way travel time for 1-stop routes: 4h 00m.

Which airport typically offers the quickest layover for flights from Ontario to Boise?

Flights via Portland (PDX) offer the fastest connection on this route, with an average layover time of 0h 57m.

Reviews of airlines servicing Boise

Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Ontario to Boise by reading reviews from past customers. 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

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

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

4,244 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

7,980 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

8,916 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

What are the cheapest airlines flying from Ontario to Boise round-trip?
Currently priced at $169, Delta will fly you from Ontario to Boise and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Alaska Airlines and American Airlines - these airlines can fly you to your destination from $178 and $218, respectively. Users have found that Delta is 47% cheaper than the other options available to this destination.
Can I find deals for flights from Ontario to Boise that include hotel bookings?
Yes. In addition to deals on Ontario to Boise flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Boise?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Boise.
Can I find deals for business class flights from Ontario to Boise?
Yes. Cheapflights offers flight deals from Ontario to Boise 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 Boise?
Currently, October is the cheapest month in which you can book a flight from Ontario to Boise (average of $314). Flying from Ontario to Boise 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

Ontario

Meridian

Nampa

Caldwell

McCall

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Top 5 airlines flying from Ontario to Boise

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$169	Average$249	FlexibilityNo cancel fee	On-timeN/A
Alaska Airlines	Cheapest$178	Average$280	FlexibilityNo cancel fee	On-time75%
American Airlines	Cheapest$218	Average$516	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$238	Average$353	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$240	Average$348	FlexibilityNo cancel fee	On-time63%

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$78+ Cheap flights from Ontario to Boise (ONT - BOI)

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.

Find cheap flights from Ontario to Boise with Cheapflights

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Cheapflights Tip: The best prices from Ontario to Boise Air Term. Gowen Fld are usually found in January or September, booked 38 days in advance, depart on a Thursday or Saturday and return on a Tuesday

Cheap flight deals from Ontario to Boise

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Boise

Cheapest flights from Ontario to BoiseExplore the most affordable flight options available from Ontario to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.

Explore the most affordable flight options available from Ontario to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Boise that are best for you.

Best time to book a flight from Ontario to Boise

Have a flexible travel schedule? Discover the best time to fly to Boise from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Boise

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Boise. Price data was last updated on August 8, 2025.

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

What is the cheapest time of day to fly from ONT to BOI?

Find hourly flight availability from Ontario to Boise. 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.

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

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

What’s the top layover airport for flights from Ontario to Boise?

Share of 1-stop round-trip flights from Ontario to Boise chosen by Cheapflights users in the past 12 months, using the same layover each way.

What’s the cheapest layover airport for flights from Ontario to Boise?

Average round-trip fare for 1-stop flights from Ontario to Boise, chosen by Cheapflights users in the past 12 months, with the same layover each way.

What’s the fastest layover option from Ontario to Boise?

Shortest average travel time for 1-stop one-way flights from Ontario to Boise, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Which airport typically offers the quickest layover for flights from Ontario to Boise?

Average layover duration for 1-stop one-way flights from Ontario to Boise, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Boise

Get insights into the airlines that provide service to Boise. 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 Boise. Reviews last updated agosto 14, 2025.

Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Ontario to Boise by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Boise. 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 Ontario to Boise round-trip?

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

How can I find direct flights from Ontario to Boise?

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

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

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Top 5 airlines flying from Ontario to Boise

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Cheapest flights from Ontario to Boise
Explore the most affordable flight options available from Ontario to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.