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Ontario

$49+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
1 adult, Economy
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Cheap 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 July 24, 2026.

This Southwest deal was found by Cheapflights users on 7/22. 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 8/138:05 am
PHX
-
ONT
Nonstop1h 15m
Southwest
Mon 8/174:50 pm
ONT
-
PHX
Nonstop1h 20m
Southwest
Deal found 7/22$97
This American Airlines deal was found by Cheapflights users on 7/23. 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 12/33:47 pm
PHX
-
ONT
Nonstop1h 14m
American Airlines
Sat 12/57:30 pm
ONT
-
PHX
Nonstop1h 18m
American Airlines
Deal found 7/23$98
This Southwest deal was found by Cheapflights users on 7/22. 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 8/197:10 am
PHX
-
ONT
2 stops6h 25m
Southwest
Wed 8/266:40 am
ONT
-
PHX
Nonstop1h 25m
Southwest
Deal found 7/22$112
This Southwest deal was found by Cheapflights users on 7/22. 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.
Sat 9/512:55 pm
PHX
-
ONT
1 stop5h 25m
Southwest
Thu 9/104:00 pm
ONT
-
PHX
1 stop4h 00m
Southwest
Deal found 7/22$117
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 9/18:39 am
LAS
-
ONT
1 stop5h 24m
Frontier
Sat 9/53:40 pm
ONT
-
LAS
Nonstop1h 11m
Frontier
Deal found 7/22$118
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Wed 8/198:39 am
LAS
-
ONT
1 stop5h 24m
Frontier
Thu 8/2011:15 am
ONT
-
LAS
Nonstop1h 10m
Frontier
Deal found 7/22$123
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Thu 8/137:00 am
LAS
-
ONT
Nonstop1h 03m
Frontier
Mon 8/178:58 am
ONT
-
LAS
1 stop28h 07m
Frontier
Deal found 7/22$124
This Frontier deal was found by Cheapflights users on 7/22. 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 10/219:10 am
LAS
-
ONT
Nonstop1h 11m
Frontier
Wed 10/212:58 pm
ONT
-
LAS
Nonstop1h 10m
Frontier
Deal found 7/22$128
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 9/18:39 am
LAS
-
ONT
1 stop5h 24m
Frontier
Wed 9/23:40 pm
ONT
-
LAS
Nonstop1h 11m
Frontier
Deal found 7/23$131
This Southwest deal was found by Cheapflights users on 7/23. 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 10/307:10 am
PHX
-
ONT
1 stop6h 05m
Southwest
Sat 10/3110:30 am
ONT
-
PHX
1 stop5h 40m
Southwest
Deal found 7/23$132
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Wed 9/97:45 pm
LAS
-
ONT
Nonstop1h 09m
Frontier
Thu 9/1011:38 am
ONT
-
LAS
1 stop6h 59m
Frontier
Deal found 7/23$137
This Super.com deal was found by Cheapflights users on 7/22. 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 8/277:00 am
LAS
-
ONT
Nonstop1h 03m
Frontier
Sun 8/303:40 pm
ONT
-
LAS
Nonstop1h 11m
Frontier
Deal found 7/22$141

Find flight deals from Arizona to Ontario

Keep the following information in mind while searching for Arizona to Ontario flight deals. Data was last updated July 24, 2026.

Round-trip from

$97
(Southwest)

One-way from

$49
(Southwest)

Popular in

June

Cheapest in

January

Average price

$204

Good round-trip deal

$197 or less

Good one-way deal

$218 or less
From Arizona to Ontario
Search Deals
One-way flight from Arizona to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Arizona to Ontario.
Search Deals
Price to beat on a one-way flight from Arizona to Ontario.
Search Deals

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 July 24, 2026.
Use the filters below to find and compare flights from Arizona to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 9/5

4:10 pm-5:20 pm

Nonstop1h 10m

Ontario

Mon 9/7

6:30 am-12:00 pm

1 stop5h 30m

$107

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 11/26

7:10 am-11:45 am

2 stops5h 35m

Ontario

Thu 12/3

3:45 pm-6:10 pm

Nonstop1h 25m

$112

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 8/13

1:30 pm-7:20 pm

1 stop5h 50m

Ontario

Mon 8/17

5:45 pm-9:55 pm

1 stop4h 10m

$117
Quickest round-trip

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 9/4

8:55 pm-10:05 pm

Nonstop1h 10m

Ontario

Mon 9/7

8:00 am-9:15 am

Nonstop1h 15m

$152

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 10/30

11:45 am-5:35 pm

2 stops5h 50m

Ontario

Sat 10/31

5:40 am-10:50 am

1 stop5h 10m

$189

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 8/15

12:15 pm-6:00 pm

1 stop5h 45m

Ontario

Thu 8/20

8:40 pm-9:55 pm

Nonstop1h 15m

$191

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 8/10

6:50 am-12:10 pm

1 stop5h 20m

Ontario

Mon 8/10

4:10 pm-9:50 pm

1 stop5h 40m

$201

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 8/15

7:20 am-2:15 pm

2 stops6h 55m

Ontario

Sat 8/22

8:35 am-12:40 pm

1 stop4h 05m

$206

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 10/14

6:45 am-1:25 pm

2 stops6h 40m

Ontario

Wed 11/11

1:30 pm-8:55 pm

1 stop6h 25m

$206

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 9/1

2:15 pm-8:05 pm

2 stops5h 50m

Ontario

Sat 9/5

4:00 pm-8:20 pm

1 stop4h 20m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $213). Flying from Arizona to Ontario in July is currently the most expensive (average of $394). 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 July 24, 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 31% on flights from Arizona to Ontario by exploring options for tickets at noon.

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 July 24, 2026.

The most flights from USAZ to ONT are scheduled on a Tuesday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from Arizona to Ontario?

Airfare is below average for this route at the moment.
Arizona to Ontario flights typically cost between $188 and $380 in August.
The cheapest round-trip price found within the last 5 days was $97 on Southwest (Aug 13-Aug 17).

How far ahead should I book a flight from Arizona to Ontario?

Booking 36 days in advance of your planned departure date is, on average, the best time to get cheap flights from Arizona to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Use this chart to determine the cheapest time to fly round-trip from Arizona to Ontario. Price data was last updated on July 18, 2026.

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

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.

  • How long is the flight from Arizona to Ontario?

    For as low as $107, Southwest can have you in Ontario from Arizona in 1h 10m. Arizona and Ontario are separated by a distance of 324 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 American Airlines ($48), Southwest ($48), and Frontier ($65).

  • 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 (83%), Envoy Air (80%), Porter Airlines (77%).

  • What are the cheapest flights from Arizona to Ontario?

    Looking at all options, your cheapest flight can be booked for $54. While the most popular route (Las Vegas Harry Reid Intl - Ontario) can be booked for $127 on average, our data indicates $419 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 $213). Flying from Arizona to Ontario in July is currently the most expensive (average of $394). 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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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 July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$81Average$175FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$97Average$323FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$318FlexibilityNo cancel feeOn-time63%

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