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$28+ 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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Mar 21 — Mar 281
Sat 3/21
Sat 3/28
1 adult, Economy
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Cheap 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 February 19, 2026.

This Super.com deal was found by Cheapflights users on 2/19. 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.
Tue 3/102:23 pm
ONT
-
LAS
Nonstop1h 14m
Frontier
Tue 3/1712:17 pm
LAS
-
ONT
Nonstop1h 11m
Frontier
Deal found 2/19$58
This Frontier deal was found by Cheapflights users on 2/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/147:31 pm
ONT
-
LAS
Nonstop1h 09m
Frontier
Mon 3/162:28 pm
LAS
-
ONT
Nonstop1h 09m
Frontier
Deal found 2/17$59
This Kiwi.com deal was found by Cheapflights users on 2/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/77:10 pm
ONT
-
LAS
Nonstop1h 09m
Frontier
Tue 3/1012:17 pm
LAS
-
ONT
Nonstop1h 11m
Frontier
Deal found 2/15$62
This Frontier deal was found by Cheapflights users on 2/18. 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.
Tue 4/147:29 pm
ONT
-
LAS
Nonstop1h 10m
Frontier
Sat 4/185:15 pm
LAS
-
ONT
Nonstop1h 08m
Frontier
Deal found 2/18$63
This CheapOair deal was found by Cheapflights users on 2/18. 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.
Sun 4/511:00 am
ONT
-
LAS
Nonstop1h 15m
Frontier
Thu 4/94:06 pm
LAS
-
ONT
Nonstop1h 09m
Frontier
Deal found 2/18$64
This Frontier deal was found by Cheapflights users on 2/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/910:57 am
ONT
-
LAS
Nonstop1h 13m
Frontier
Mon 3/92:28 pm
LAS
-
ONT
Nonstop1h 09m
Frontier
Deal found 2/15$65
This Jetabroad deal was found by Cheapflights users on 2/19. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/221:55 pm
ONT
-
LAS
Nonstop1h 12m
Frontier
Mon 3/237:00 am
LAS
-
ONT
Nonstop1h 06m
Frontier
Deal found 2/19$66
This Expedia deal was found by Cheapflights users on 2/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/48:19 pm
ONT
-
LAS
Nonstop1h 09m
Frontier
Tue 4/711:00 am
LAS
-
ONT
Nonstop1h 09m
Frontier
Deal found 2/17$67
This Super.com deal was found by Cheapflights users on 2/18. 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.
Thu 2/267:22 pm
ONT
-
LAS
Nonstop1h 09m
Frontier
Thu 3/55:17 pm
LAS
-
ONT
Nonstop1h 10m
Frontier
Deal found 2/18$68
This Frontier deal was found by Cheapflights users on 2/18. 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.
Wed 3/42:06 pm
ONT
-
LAS
Nonstop1h 14m
Frontier
Fri 3/67:00 am
LAS
-
ONT
Nonstop1h 06m
Frontier
Deal found 2/18$69
This Priceline deal was found by Cheapflights users on 2/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:47 am
ONT
-
LAS
Nonstop1h 15m
Frontier
Mon 4/209:00 am
LAS
-
ONT
Nonstop1h 14m
Frontier
Deal found 2/18$70
This American Airlines deal was found by Cheapflights users on 2/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:19 pm
ONT
-
PHX
Nonstop1h 21m
American Airlines
Thu 5/77:17 am
PHX
-
ONT
Nonstop1h 22m
American Airlines
Deal found 2/17$144

Find flight deals from Ontario to Arizona

Keep the following information in mind while searching for Ontario to Arizona flight deals. Data was last updated February 19, 2026.

Round-trip from

$58
(CheapOair)

One-way from

$28
(Expedia)

Popular in

June

Cheapest in

December

Average price

$177

Good round-trip deal

$318 or less

Good one-way deal

$170 or less
From Ontario to Arizona
Search Deals
One-way flight from Ontario to Arizona
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Arizona.
Search Deals
Price to beat on a one-way flight from Ontario to Arizona.
Search Deals

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 February 19, 2026.
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

Wed 4/22

3:45 pm-5:05 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Sat 4/25

7:05 pm-8:15 pm

Nonstop1h 10m

$144

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 4/1

1:27 pm-6:41 pm

1 stop5h 14m

Las Vegas Harry Reid Intl

Wed 4/8

6:00 am-12:20 pm

1 stop6h 20m

$157

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 4/7

3:45 pm-9:10 pm

2 stops5h 25m

Phoenix Sky Harbor Intl

Sat 4/11

7:50 am-12:20 pm

1 stop4h 30m

$159

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 5/6

12:59 am-7:36 am

1 stop6h 37m

Phoenix Sky Harbor Intl

Sun 5/10

9:24 pm-7:31 am

1 stop10h 07m

$160

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 3/17

2:00 pm-6:25 pm

1 stop4h 25m

Las Vegas Harry Reid Intl

Tue 3/24

12:35 pm-6:20 pm

2 stops5h 45m

$162

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 3/22

1:55 pm-12:08 am

2 stops34h 13m

Phoenix Sky Harbor Intl

Wed 3/25

4:27 pm-9:03 pm

1 stop4h 36m

$167

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 5/13

12:30 pm-5:35 pm

2 stops5h 05m

Phoenix Sky Harbor Intl

Sat 5/16

5:30 am-8:40 am

1 stop3h 10m

$169

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 3/18

5:02 pm-6:25 pm

Nonstop1h 23m

Phoenix Sky Harbor Intl

Tue 3/31

3:02 pm-4:22 pm

Nonstop1h 20m

$171

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 3/30

3:05 pm-4:25 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Thu 4/2

11:20 am-12:40 pm

Nonstop1h 20m

$171

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 4/30

9:55 pm-11:00 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Sat 5/2

7:40 am-8:40 am

Nonstop1h 00m

$171

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/15

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 $26). 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 February 19, 2026.

It’s optimal to fly from Ontario to Arizona at noon. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight in the evening.

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 February 17, 2026.

Travelers seeking maximum savings on their Ontario to Arizona flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday 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 February 19, 2026.

The most flights from ONT to USAZ are scheduled on a Thursday (15 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (6 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 February 19, 2026.
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
4,295 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,295 reviews
Southwest
8.0
Very good
4,295 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,321 reviews
Southwest
8.0
Very good
4,295 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Frontier
5.7
Fair
3,046 reviews
Southwest
8.0
Very good
4,295 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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 20m. Fly via Southwest, United Airlines, or Frontier to get the fastest option. The distance between Ontario and Arizona is about 324 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 Southwest, with whom users have recently found tickets for as low as $48. However, be on the lookout for offers from Frontier and American Airlines, 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 (87%), British Airways (85%) and Southwest (83%).

  • What are the cheapest flights from Ontario to Arizona?

    Looking at all options, your cheapest flight can be booked for $102. While the most popular route (Ontario - Las Vegas Harry Reid Intl) can be booked for $53 on average, our data indicates $912 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 $26). 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.

See more FAQs

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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 February 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$177FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$97Average$330FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$122Average$377FlexibilityNo cancel feeOn-time71%

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