HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$109+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Idaho 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 Ontario to Idaho

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Idaho (USID). 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 December 18, 2024.

Round-trip from

$218
(United Airlines)

One-way from

$109
(Delta)
From Ontario to Idaho
Search Deals
One-way flight from Ontario to Idaho
Search Deals

Find 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 December 18, 2024.

This Southwest deal was found by Cheapflights users on 12/17. 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.
Tue 12/242:50 pmONT - BOI
1 stop6h 00mSouthwest
Thu 1/27:55 pmBOI - ONT
1 stop5h 15mSouthwest
Deal found 12/17$386
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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.
Mon 12/308:32 pmONT - GEG
1 stop12h 48mAlaska Airlines
Mon 1/68:30 pmGEG - ONT
1 stop14h 19mAlaska Airlines
Deal found 12/16$390
This Delta deal was found by Cheapflights users on 12/17. 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 12/315:30 amONT - BOI
1 stop5h 50mDelta
Mon 1/65:15 pmBOI - ONT
1 stop6h 17mDelta
Deal found 12/17$402
This Alaska Airlines deal was found by Cheapflights users on 12/17. 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 12/3110:40 amONT - BOI
1 stop4h 40mAlaska Airlines
Fri 1/33:41 pmBOI - ONT
1 stop5h 16mAlaska Airlines
Deal found 12/17$424
This Delta deal was found by Cheapflights users on 12/17. 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.
Thu 12/264:58 pmONT - GEG
1 stop7h 00mDelta
Wed 1/15:55 amGEG - ONT
1 stop6h 13mDelta
Deal found 12/17$506
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/286:00 amONT - BOI
1 stop4h 32mUnited Airlines
Sun 1/57:25 pmBOI - ONT
1 stop4h 35mUnited Airlines
Deal found 12/16$507
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/251:42 pmONT - GEG
1 stop7h 22mUnited Airlines
Wed 1/17:00 amGEG - ONT
1 stop6h 16mUnited Airlines
Deal found 12/17$521
This Delta deal was found by Cheapflights users on 12/16. 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.
Wed 12/255:30 amONT - JAC
1 stop5h 50mDelta
Mon 12/307:00 amJAC - ONT
1 stop6h 20mDelta
Deal found 12/16$587
This Delta deal was found by Cheapflights users on 12/18. 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.
Thu 12/194:58 pmONT - SUN
1 stop4h 25mDelta
Wed 12/257:29 amSUN - ONT
1 stop5h 39mDelta
Deal found 12/18$622
This Southwest deal was found by Cheapflights users on 12/17. 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 12/276:20 pmONT - GEG
1 stop5h 10mSouthwest
Mon 12/3011:50 amGEG - ONT
1 stop8h 25mSouthwest
Deal found 12/17$656
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Tue 12/176:00 amONT - SUN
1 stop5h 39mUnited Airlines
Sun 12/292:31 pmSUN - ONT
1 stop7h 18mUnited Airlines
Deal found 12/16$672
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/181:40 pmONT - JAC
1 stop6h 39mUnited Airlines
Wed 12/257:00 amJAC - ONT
1 stop6h 40mUnited Airlines
Deal found 12/17$677

Find flights from Ontario to Idaho within your budget

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 December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Wed 1/22

5:10 am-12:48 pm

1 stop7h 38m

Spokane

Sat 1/25

1:50 pm-8:51 pm

1 stop7h 01m

$218

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 2/1

4:06 pm-10:23 pm

1 stop5h 17m

Boise Air Term. Gowen Fld

Tue 2/4

12:14 pm-8:13 pm

1 stop8h 59m

$218

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Thu 1/9

6:00 am-12:18 pm

1 stop6h 18m

Spokane

Tue 1/14

5:05 pm-11:53 pm

1 stop6h 48m

$238

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Mon 1/27

7:01 pm-3:27 pm

1 stop19h 26m

Idaho Falls Fanning Field

Mon 2/3

4:04 pm-10:39 pm

1 stop7h 35m

$240

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Tue 2/4

6:00 am-10:54 am

1 stop4h 54m

Spokane

Tue 2/4

1:37 pm-8:13 pm

1 stop6h 36m

$244

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 5/14

5:53 pm-12:03 am

1 stop5h 10m

Boise Air Term. Gowen Fld

Wed 5/21

7:30 am-1:13 pm

1 stop6h 43m

$263

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Thu 1/23

4:25 pm-11:10 pm

1 stop6h 45m

Spokane

Sun 1/26

3:21 pm-9:58 pm

1 stop6h 37m

$311

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 1/7

5:45 am-3:25 pm

1 stop8h 40m

Boise Air Term. Gowen Fld

Thu 1/9

1:20 pm-8:20 pm

1 stop8h 00m

$317

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 1/7

10:47 am-4:27 pm

1 stop4h 40m

Boise Air Term. Gowen Fld

Thu 1/9

1:01 pm-5:57 pm

1 stop5h 56m

$328

OntarioHailey

ONT - SUN

ONTSUN

Ontario

Fri 1/17

4:06 pm-6:15 pm

1 stop25h 09m

Hailey Sun Valley-Friedman

Fri 1/24

6:57 pm-6:13 pm

1 stop24h 16m

$332

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 40 results
1
2
3
4

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.

Travel insights for flights from Ontario to Idaho

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

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Idaho (average of $314). Flying from Ontario to Idaho in June is currently the most expensive (average of $436). 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 December 18, 2024.

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.

Rainfall in Idaho by month

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

In terms of precipitation, rainfall in Idaho 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 Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

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

If weather is an important factor for your trip to Idaho, 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).

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 December 18, 2024.
Read through reviews of airlines operating flights from Ontario to Idaho, such as Alaska Airlines, American Airlines and Southwest. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Southwest
8.1
Very good
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Alaska Airlines
8.0
Very good
9,552 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Delta
8.0
Very good
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

United Airlines
7.4
Good
9,059 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

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.

  • 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 Delta ($109), Alaska Airlines ($119), and United Airlines ($144).

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

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

  • 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, October is the cheapest month in which you can book a flight from Ontario to Idaho (average of $314). Flying from Ontario to Idaho in June is currently the most expensive (average of $436). 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 Ontario to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Honolulu flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
San Francisco to Las Vegas flights
Los Angeles to LaGuardia flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Miami flights
Los Angeles to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to Orlando flights
Los Angeles to O'Hare Intl flights
Santa Ana to Las Vegas flights
San Francisco to Newark flights
Los Angeles to San Francisco flights
Los Angeles to Hobby flights
San Francisco to Honolulu flights
San Francisco to Seattle flights
Burbank to Las Vegas flights
San Jose to Las Vegas flights
Los Angeles to Fort Lauderdale flights
San Francisco to Dallas/Fort Worth flights
Oakland to Las Vegas flights
Los Angeles to Reagan-National flights
Ontario to Dallas/Fort Worth flights
Los Angeles to Boston flights
San Francisco to Miami flights
Santa Ana to Newark flights
Los Angeles to George Bush Intcntl flights
Ontario to Seattle flights
Los Angeles to Baltimore flights
Los Angeles to Atlanta flights
San Francisco to LaGuardia flights
Los Angeles to New Orleans flights
Burbank to Newark flights
San Jose to Los Angeles flights
Los Angeles to San Jose flights
Los Angeles to Portland flights
Santa Ana to Seattle flights
Los Angeles to Salt Lake City flights
Los Angeles to Dulles Intl flights
Oakland to Los Angeles flights
San Diego to John F Kennedy Intl flights
Burbank to LaGuardia flights
Oakland to Santa Ana flights
Los Angeles to Sky Harbor Intl flights
San Francisco to Sky Harbor Intl flights
Los Angeles to Denver flights
Santa Ana to LaGuardia flights

Top 7 airlines flying from Ontario to Idaho

Discover the top 7 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 December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$108Average$154FlexibilityNo cancel feeOn-time65%
Avelo AirlinesCheapest$132Average$132FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$178Average$442FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$196Average$319FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$218Average$396FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$240Average$338FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$249Average$410FlexibilityNo cancel feeOn-time69%
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.