HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$116+ Cheap flights from Idaho to Ontario (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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Jan 22 — Jan 291
Wed 1/22
Wed 1/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho 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.

Cheap flight deals from Idaho to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Idaho (USID) 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 January 17, 2025.

Round-trip from

$232
(Alaska Airlines)

One-way from

$116
(Alaska Airlines)
From Idaho to Ontario
Search Deals
One-way flight from Idaho to Ontario
Search Deals

Find flight deals from Idaho to Ontario

Cheapest flights from Idaho to Ontario
Explore the most affordable flight options available from Idaho to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 17, 2025.

This Delta deal was found by Cheapflights users on 1/15. 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 3/295:55 pmJAC - ONT
1 stop4h 52mDelta
Tue 4/86:00 amONT - JAC
1 stop5h 22mDelta
Deal found 1/15$237
This Delta deal was found by Cheapflights users on 1/15. 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.
Tue 2/45:35 amGEG - ONT
1 stop6h 49mDelta
Fri 2/75:10 pmONT - GEG
1 stop6h 33mDelta
Deal found 1/15$240
This Delta deal was found by Cheapflights users on 1/15. 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 2/81:10 pmIDA - ONT
2 stops10h 22mDelta
Tue 2/116:00 amONT - IDA
1 stop5h 30mDelta
Deal found 1/15$242
This Delta deal was found by Cheapflights users on 1/16. 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 2/810:35 amBOI - ONT
1 stop5h 50mDelta
Mon 2/105:10 pmONT - BOI
1 stop6h 08mDelta
Deal found 1/16$245
This Alaska Airlines deal was found by Cheapflights users on 1/15. 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 2/78:30 pmGEG - ONT
1 stop14h 19mAlaska Airlines
Sat 2/84:06 pmONT - GEG
1 stop7h 37mAlaska Airlines
Deal found 1/15$250
This Alaska Airlines deal was found by Cheapflights users on 1/16. 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.
Sun 2/97:00 amBOI - ONT
1 stop4h 34mAlaska Airlines
Mon 2/104:06 pmONT - BOI
1 stop6h 52mAlaska Airlines
Deal found 1/16$252
This Alaska Airlines deal was found by Cheapflights users on 1/15. 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 2/88:00 amIDA - ONT
1 stop11h 13mAlaska Airlines
Tue 2/114:06 pmONT - IDA
1 stop5h 27mAlaska Airlines
Deal found 1/15$279
This Southwest deal was found by Cheapflights users on 1/16. 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.
Sun 2/96:25 amBOI - ONT
1 stop7h 30mSouthwest
Fri 2/145:10 pmONT - BOI
1 stop6h 35mSouthwest
Deal found 1/16$292
This United Airlines deal was found by Cheapflights users on 1/16. 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.
Sat 2/152:36 pmBOI - ONT
1 stop7h 16mUnited Airlines
Sat 2/226:00 amONT - BOI
1 stop4h 15mUnited Airlines
Deal found 1/16$303
This United Airlines deal was found by Cheapflights users on 1/15. 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.
Sat 2/153:37 pmGEG - ONT
1 stop5h 03mUnited Airlines
Sat 2/223:30 pmONT - GEG
1 stop5h 41mUnited Airlines
Deal found 1/15$311
This Southwest deal was found by Cheapflights users on 1/16. 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.
Mon 2/176:20 amGEG - ONT
1 stop6h 45mSouthwest
Thu 2/204:05 pmONT - GEG
1 stop7h 20mSouthwest
Deal found 1/16$314
This United Airlines deal was found by Cheapflights users on 1/15. 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.
Fri 2/144:20 pmJAC - ONT
1 stop5h 32mUnited Airlines
Tue 2/185:05 amONT - JAC
1 stop7h 17mUnited Airlines
Deal found 1/15$317

Find flights from Idaho to Ontario within your budget

Customize your flight search to find flights from Idaho 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 January 17, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 2/5

8:00 am-8:13 pm

1 stop13h 13m

Ontario

Tue 2/11

4:06 pm-10:23 pm

1 stop5h 17m

$232

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 3/25

4:40 pm-10:22 pm

1 stop6h 42m

Ontario

Wed 4/2

5:15 pm-12:17 am

1 stop6h 02m

$233

JacksonOntario

JAC - ONT

JACONT

Jackson Hole

Sat 3/29

5:55 pm-9:47 pm

1 stop4h 52m

Ontario

Wed 4/9

6:00 am-12:22 pm

1 stop5h 22m

$237

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Tue 2/4

5:35 am-12:24 pm

1 stop6h 49m

Ontario

Fri 2/7

5:10 pm-11:43 pm

1 stop6h 33m

$240

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sat 2/8

1:10 pm-10:32 pm

2 stops10h 22m

Ontario

Tue 2/11

6:00 am-12:30 pm

1 stop5h 30m

$242

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Fri 2/7

8:30 pm-10:49 am

1 stop14h 19m

Ontario

Sat 2/8

4:06 pm-11:43 pm

1 stop7h 37m

$250

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sat 2/8

8:00 am-6:13 pm

1 stop11h 13m

Ontario

Tue 2/11

4:06 pm-10:33 pm

1 stop5h 27m

$279

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 2/12

1:35 pm-8:25 pm

1 stop7h 50m

Ontario

Sat 2/15

1:25 pm-11:10 pm

2 stops8h 45m

$287

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Sat 2/15

3:37 pm-8:40 pm

1 stop5h 03m

Ontario

Sat 2/22

3:30 pm-9:11 pm

1 stop5h 41m

$311

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 4/9

2:38 pm-8:42 pm

1 stop7h 04m

Ontario

Mon 4/14

4:23 pm-11:03 pm

1 stop5h 40m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 30 results
1
2
3

Best time to book a flight from Idaho to Ontario

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

Travel insights for flights from Idaho to Ontario

Get recent, data-driven insights about flights from Idaho to Ontario including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Idaho to Ontario (average of $246). Flying from Idaho to Ontario in March is currently the most expensive (average of $311). 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 ID to ONT?

Find hourly flight availability from Idaho 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 January 17, 2025.

When flying from Idaho to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 January 17, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta and Alaska Airlines from Idaho to Ontario to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,681 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,511 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,964 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

Find useful and relevant information for your journey from Idaho to Ontario. 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 into for flights to Ontario from Idaho?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ontario from Idaho.

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

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $116. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Idaho to Ontario for a low price.

  • What are the most popular routes from Idaho to Ontario?

    The most popular flight routes from Idaho to Ontario are Spokane - Ontario, Boise Air Term. Gowen Fld - Ontario and Idaho Falls Fanning Field - Ontario.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Idaho to Ontario (average of $246). Flying from Idaho to Ontario in March is currently the most expensive (average of $311). 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 Idaho to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to Los Angeles flights
Newark to Los Angeles flights
John F Kennedy Intl to San Francisco flights
O'Hare Intl to Las Vegas flights
Dallas/Fort Worth to Las Vegas flights
Seattle to Las Vegas flights
Minneapolis to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Newark to Las Vegas flights
O'Hare Intl to Los Angeles flights
San Francisco to Las Vegas flights
Seattle to Los Angeles flights
Denver to Las Vegas flights
Atlanta to Las Vegas flights
Los Angeles to Las Vegas flights
Newark to San Francisco flights
LaGuardia to Las Vegas flights
Dulles Intl to Las Vegas flights
Baltimore to Las Vegas flights
Santa Ana to Las Vegas flights
Midway to Las Vegas flights
Seattle to San Francisco flights
Seattle to San Diego flights
Boston to Las Vegas flights
Detroit to Las Vegas flights
LaGuardia to Los Angeles flights
Seattle to Santa Ana flights
Los Angeles to San Francisco flights
Seattle to Ontario flights
Burbank to Las Vegas flights
Boston to Los Angeles flights
San Francisco to Los Angeles flights
Hobby to Las Vegas flights
Reagan-National to Los Angeles flights
O'Hare Intl to San Francisco flights
Reagan-National to Las Vegas flights
Hobby to Los Angeles flights
San Jose to Las Vegas flights
Philadelphia to Las Vegas flights
Baltimore to Los Angeles flights
Oakland to Las Vegas flights
Orlando to Las Vegas flights
Los Angeles to San Jose flights
Fort Lauderdale to Las Vegas flights
Dulles Intl to Los Angeles flights
Dallas/Fort Worth to San Francisco flights
Love Field to Las Vegas flights
George Bush Intcntl to Las Vegas flights
John F Kennedy Intl to San Diego flights

Top 6 airlines flying from Idaho to Ontario

Discover the top 6 airlines that operate flights from Idaho 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 January 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$115Average$186FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$128Average$136FlexibilityNo cancel feeOn-time88%
DeltaCheapest$132Average$413FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$201Average$312FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$233Average$476FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$262Average$371FlexibilityNo 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.