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$37+ Cheap flights from Ontario (ONT) to Arizona

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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
1 adult, Economy
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Cheap flight deals from Ontario to Arizona

Keep the following information in mind while searching for Ontario to Arizona flight deals. Data was last updated November 21, 2025.

Round-trip from

$53
(Frontier)

One-way from

$37
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$173

Good round-trip deal

$335 or less

Good one-way deal

$191 or less
From Ontario to Arizona
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One-way flight from Ontario to Arizona
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Highest demand for flights based on searches. 7% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Ontario to Arizona.
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Price to beat on a one-way flight from Ontario to Arizona.
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Find flight deals from Ontario to Arizona

Cheapest flights from Ontario to Arizona
Explore the most affordable flight options available from Ontario to Arizona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:15 amONT - LAS
Nonstop1h 07mFrontier
Tue 12/168:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/20$57
This Super.com deal was found by Cheapflights users on 11/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:15 amONT - LAS
Nonstop1h 07mFrontier
Thu 12/118:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/19$59
This CheapOair deal was found by Cheapflights users on 11/19. 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.
Wed 12/176:15 amONT - LAS
Nonstop1h 07mFrontier
Thu 12/184:13 pmLAS - ONT
Nonstop1h 09mFrontier
Deal found 11/19$60
This Super.com deal was found by Cheapflights users on 11/18. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:15 amONT - LAS
Nonstop1h 07mFrontier
Sat 12/138:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/18$61
This CheapOair deal was found by Cheapflights users on 11/19. 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.
Mon 12/156:15 amONT - LAS
Nonstop1h 07mFrontier
Mon 12/158:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/19$62
This Kiwi.com deal was found by Cheapflights users on 11/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/66:15 amONT - LAS
Nonstop1h 07mFrontier
Tue 12/98:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/19$71
This CheapOair deal was found by Cheapflights users on 11/19. 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.
Fri 12/126:15 amONT - LAS
Nonstop1h 07mFrontier
Mon 12/158:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/19$73
This CheapOair deal was found by Cheapflights users on 11/19. 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.
Wed 12/176:15 amONT - LAS
Nonstop1h 07mFrontier
Fri 12/198:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/19$74
This Frontier deal was found by Cheapflights users on 11/20. 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.
Wed 12/106:15 amONT - LAS
Nonstop1h 07mFrontier
Fri 12/1212:02 pmLAS - ONT
Nonstop1h 08mFrontier
Deal found 11/20$75
This CheapOair deal was found by Cheapflights users on 11/19. 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.
Sun 12/146:15 amONT - LAS
Nonstop1h 07mFrontier
Fri 12/194:01 pmLAS - ONT
Nonstop1h 08mFrontier
Deal found 11/19$76
This Frontier deal was found by Cheapflights users on 11/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/63:20 pmONT - PHX
1 stop8h 24mFrontier
Sun 12/77:00 amPHX - ONT
1 stop9h 06mFrontier
Deal found 11/18$146
This CheapOair deal was found by Cheapflights users on 11/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 amONT - PHX
1 stop3h 40mFrontier
Tue 12/3010:26 pmPHX - ONT
1 stop23h 51mFrontier
Deal found 11/18$147

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Arizona 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 November 21, 2025.
Use the filters below to find and compare flights from Ontario to Arizona that are best for you.

Fly from

Ontario

Fly to

Arizona

Route

Depart

Return

Price

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 12/28

6:37 pm-8:48 am

1 stop13h 11m

Phoenix Sky Harbor Intl

Sun 1/4

10:26 pm-9:17 pm

1 stop23h 51m

$150

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 12/22

6:00 am-9:16 pm

1 stop14h 16m

Phoenix Sky Harbor Intl

Mon 12/29

10:26 pm-9:17 pm

1 stop23h 51m

$150

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 12/17

8:40 am-9:45 am

Nonstop1h 05m

Las Vegas Harry Reid Intl

Thu 12/18

6:45 am-9:55 am

1 stop3h 10m

$154

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 1/20

7:15 am-1:40 pm

1 stop5h 25m

Phoenix Sky Harbor Intl

Tue 1/20

6:42 pm-2:12 pm

1 stop20h 30m

$162

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 12/4

2:59 pm-8:48 am

1 stop16h 49m

Phoenix Sky Harbor Intl

Mon 12/8

9:16 am-2:25 pm

1 stop6h 09m

$168

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 2/11

11:15 am-3:25 pm

1 stop4h 10m

Las Vegas Harry Reid Intl

Thu 2/12

4:40 pm-9:50 pm

2 stops5h 10m

$169

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 12/22

6:00 am-9:16 pm

1 stop14h 16m

Phoenix Sky Harbor Intl

Fri 12/26

10:26 pm-4:31 pm

1 stop19h 05m

$175

OntarioTucson

ONT - TUS

ONTTUS

Ontario

Sun 1/4

6:00 am-6:58 pm

1 stop11h 58m

Tucson

Thu 1/8

9:59 pm-7:36 am

1 stop10h 37m

$176

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 12/25

6:00 am-7:16 pm

1 stop12h 16m

Phoenix Sky Harbor Intl

Wed 12/31

3:43 pm-11:59 pm

1 stop9h 16m

$176

OntarioTucson

ONT - TUS

ONTTUS

Ontario

Thu 1/8

3:30 pm-2:04 pm

1 stop21h 34m

Tucson

Sun 1/11

2:55 pm-1:56 pm

1 stop24h 01m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Arizona

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

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

Currently, April is the cheapest month in which you can book a flight from Ontario to Arizona (average of $28). Flying from Ontario to Arizona in July is currently the most expensive (average of $82). 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 AZ?

Find hourly flight availability from Ontario to Arizona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2025.

It’s optimal to fly from Ontario to Arizona at noon. By choosing this option you can save up to 32% on the cost of your flight, compared to a flight in the morning.

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

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

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

Weekly flight availability from Ontario to Arizona

Explore weekly flight availability from Ontario to Arizona. 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 November 21, 2025.

The most flights from ONT to USAZ are scheduled on a Wednesday (13 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

Reviews of airlines servicing Arizona

Get insights into the airlines that provide service to Arizona. 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 Arizona. Reviews last updated November 21, 2025.
Read reviews from past customers who have flown Southwest, American Airlines, and Frontier from Ontario to Arizona. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,251 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,251 reviews
Southwest
8.0
Very good
4,251 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,047 reviews
Southwest
8.0
Very good
4,251 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,102 reviews
Southwest
8.0
Very good
4,251 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Arizona. 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 Arizona?

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

  • How long is the flight from Ontario to Arizona?

    There are many flights that can get you from Ontario to Arizona in 1h 05m. Fly via Frontier, Southwest, or Delta to get the fastest option. The distance between Ontario and Arizona is about 197 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $42. However, be on the lookout for offers from Southwest and Delta, as they are both options that can get you from Ontario to Arizona for a low price.

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

    The most popular route from Ontario to Arizona is Ontario - Las Vegas Harry Reid Intl. You may also consider Ontario - Phoenix Sky Harbor Intl or Ontario - Tucson.

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

    The top 3 most reliable airlines when flying from Ontario to Arizona are Porter Airlines (89%), SkyWest Airlines (88%) and British Airways (84%).

  • What are the cheapest flights from Ontario to Arizona?

    Looking at all options, your cheapest flight can be booked for $101. While the most popular route (Ontario - Las Vegas Harry Reid Intl) can be booked for $57 on average, our data indicates $799 when flying from Ontario to Arizona.

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

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

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

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

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

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

    Currently, April is the cheapest month in which you can book a flight from Ontario to Arizona (average of $28). Flying from Ontario to Arizona in July is currently the most expensive (average of $82). 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.

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Alternative routes for Ontario to Arizona

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

Discover the top 3 airlines that operate flights from Ontario to Arizona. 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 November 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$169FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$97Average$328FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$122Average$388FlexibilityNo cancel feeOn-time71%

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