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$48+ Cheap flights from Arizona 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Arizona to Ontario

Keep the following information in mind while searching for Arizona to Ontario flight deals. Data was last updated June 12, 2025.

Round-trip from

$77
(Frontier)

One-way from

$48
(Southwest)

Popular in

June

Cheapest in

August

Average price

$166

Good round-trip deal

$239 or less

Good one-way deal

$149 or less
From Arizona to Ontario
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One-way flight from Arizona to Ontario
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Highest demand for flights based on searches. 16% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Arizona to Ontario.
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Price to beat on a one-way flight from Arizona to Ontario.
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Find flight deals from Arizona to Ontario

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

This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/53:09 pmLAS - ONT
Nonstop1h 11mFrontier
Thu 8/75:14 pmONT - LAS
Nonstop1h 14mFrontier
Deal found 6/12$77
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/42:35 pmPHX - ONT
Nonstop1h 21mAmerican Airlines
Thu 11/61:31 pmONT - PHX
Nonstop1h 19mAmerican Airlines
Deal found 6/11$97
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/75:05 amPHX - ONT
1 stop4h 40mSouthwest
Mon 8/119:15 amONT - PHX
Nonstop1h 20mSouthwest
Deal found 6/11$107
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/44:56 pmPHX - ONT
1 stop4h 46mFrontier
Thu 11/67:35 pmONT - PHX
1 stop3h 53mFrontier
Deal found 6/10$145
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/32:55 pmLAS - ONT
1 stop5h 20mSouthwest
Fri 9/55:40 amONT - LAS
Nonstop1h 05mSouthwest
Deal found 6/10$149
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1412:45 pmTUS - ONT
1 stop3h 34mFrontier
Sun 8/176:00 amONT - TUS
1 stop5h 50mFrontier
Deal found 6/11$205
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/31:10 pmLAS - ONT
1 stop5h 02mAmerican Airlines
Sat 7/512:55 pmONT - LAS
1 stop5h 03mAmerican Airlines
Deal found 6/11$219
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/17:15 pmTUS - ONT
1 stop3h 35mSouthwest
Wed 7/96:20 amONT - TUS
1 stop3h 25mSouthwest
Deal found 6/11$243
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/85:55 amTUS - ONT
1 stop6h 19mDelta
Tue 7/156:00 amONT - TUS
1 stop4h 19mDelta
Deal found 6/10$249
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.
Tue 7/86:26 amTUS - ONT
1 stop5h 48mUnited Airlines
Sat 7/195:05 amONT - TUS
1 stop7h 23mUnited Airlines
Deal found 6/10$309
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:29 pmTUS - ONT
2 stops8h 27mAlaska Airlines
Sat 11/87:25 amONT - TUS
1 stop13h 35mAlaska Airlines
Deal found 6/11$348
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/216:04 pmFLG - ONT
1 stop3h 34mAmerican Airlines
Fri 7/254:45 pmONT - FLG
1 stop4h 41mAmerican Airlines
Deal found 6/12$386

Cheapflights Fare Finder

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

Fly from

Arizona

Fly to

Ontario

Route

Depart

Return

Price

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 8/5

3:09 pm-4:20 pm

Nonstop1h 11m

Ontario

Thu 8/7

5:14 pm-6:28 pm

Nonstop1h 14m

$77

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 8/7

3:04 pm-4:24 pm

Nonstop1h 20m

Ontario

Mon 8/11

12:22 pm-1:39 pm

Nonstop1h 17m

$97

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 8/7

5:05 am-9:45 am

1 stop4h 40m

Ontario

Mon 8/11

9:15 am-10:35 am

Nonstop1h 20m

$107

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Wed 9/3

2:55 pm-8:15 pm

1 stop5h 20m

Ontario

Fri 9/5

5:40 am-6:45 am

Nonstop1h 05m

$149

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 9/8

6:00 am-11:47 am

1 stop5h 47m

Ontario

Thu 9/11

7:35 pm-11:28 pm

1 stop3h 53m

$152

TucsonOntario

TUS - ONT

TUSONT

Tucson

Thu 8/14

12:45 pm-4:19 pm

1 stop3h 34m

Ontario

Sun 8/17

6:00 am-11:50 am

1 stop5h 50m

$205

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Thu 7/3

1:10 pm-6:12 pm

1 stop5h 02m

Ontario

Sat 7/5

12:55 pm-5:58 pm

1 stop5h 03m

$219

TucsonOntario

TUS - ONT

TUSONT

Tucson

Tue 7/1

7:15 pm-10:50 pm

1 stop3h 35m

Ontario

Wed 7/9

6:20 am-9:45 am

1 stop3h 25m

$243

TucsonOntario

TUS - ONT

TUSONT

Tucson

Tue 7/8

5:55 am-12:14 pm

1 stop6h 19m

Ontario

Tue 7/15

6:00 am-10:19 am

1 stop4h 19m

$249

TucsonOntario

TUS - ONT

TUSONT

Tucson

Tue 7/8

6:26 am-12:14 pm

1 stop5h 48m

Ontario

Sat 7/19

5:05 am-12:28 pm

1 stop7h 23m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 33 results
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Best time to book a flight from Arizona to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Arizona to Ontario (average of $246). Flying from Arizona 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 AZ to ONT?

Find hourly flight availability from Arizona 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 June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Arizona to Ontario as you normally would.

Weekly flight availability from Arizona to Ontario

Explore weekly flight availability from Arizona to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

The most flights from USAZ to ONT are scheduled on a Monday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

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 June 12, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Arizona to Ontario by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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 Arizona 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 Arizona?

    If you book a flight to Ontario from Arizona, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

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

    The cheapest airlines for a one-way flight from Arizona to Ontario are Southwest ($48), American Airlines ($49), and Frontier ($52).

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

    The most popular flight routes from Arizona to Ontario are Las Vegas Harry Reid Intl - Ontario, Phoenix Sky Harbor Intl - Ontario and Tucson - Ontario.

  • What are the most reliable airlines from Arizona to Ontario?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Arizona to Ontario on time: American Airlines (84%), Envoy Air (83%), British Airways (80%).

  • What are the cheapest flights from Arizona to Ontario?

    Looking at all options, your cheapest flight can be booked for $89. While the most popular route (Las Vegas Harry Reid Intl - Ontario) can be booked for $91 on average our data indicates $226 when flying from Arizona to Ontario.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Arizona to Ontario (average of $246). Flying from Arizona 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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Alternative routes for Arizona to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Arizona to Ontario

Discover the top 3 airlines that operate flights from Arizona 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$40Average$110FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$120Average$375FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$128Average$262FlexibilityNo cancel feeOn-time63%

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