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$40+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$78
(Frontier)

One-way from

$40
(Frontier)

Popular in

June

Cheapest in

August

Average price

$153

Good round-trip deal

$138 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. 17% potential increase in price ($27 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This Frontier deal was found by Cheapflights users on 7/29. 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.
Fri 8/110:43 amLAS - ONT
Nonstop1h 10mFrontier
Tue 8/57:00 amONT - LAS
Nonstop1h 11mFrontier
Deal found 7/29$78
This American Airlines deal was found by Cheapflights users on 7/30. 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 8/263:04 pmPHX - ONT
Nonstop1h 20mAmerican Airlines
Wed 8/276:17 amONT - PHX
Nonstop1h 16mAmerican Airlines
Deal found 7/30$97
This Southwest deal was found by Cheapflights users on 7/31. 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 8/219:55 amLAS - ONT
Nonstop1h 10mSouthwest
Mon 8/255:05 pmONT - LAS
Nonstop1h 10mSouthwest
Deal found 7/31$97
This Southwest deal was found by Cheapflights users on 7/29. 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 8/261:00 pmPHX - ONT
1 stop4h 35mSouthwest
Wed 8/273:35 pmONT - PHX
Nonstop1h 20mSouthwest
Deal found 7/29$107
This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/47:25 pmPHX - ONT
1 stop5h 25mFrontier
Thu 11/67:35 pmONT - PHX
1 stop3h 53mFrontier
Deal found 7/29$156
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3112:45 pmTUS - ONT
1 stop3h 34mFrontier
Wed 8/67:22 pmONT - TUS
1 stop16h 28mFrontier
Deal found 7/29$195
This Delta deal was found by Cheapflights users on 7/30. 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.
Sat 8/235:50 amTUS - ONT
1 stop6h 24mDelta
Mon 8/254:50 pmONT - TUS
1 stop4h 37mDelta
Deal found 7/30$196
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 8/295:14 pmTUS - ONT
1 stop4h 25mAmerican Airlines
Mon 9/16:17 amONT - TUS
1 stop3h 12mAmerican Airlines
Deal found 7/30$232
This Southwest deal was found by Cheapflights users on 7/29. 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 8/205:40 amTUS - ONT
2 stops7h 30mSouthwest
Wed 8/202:10 pmONT - TUS
1 stop6h 10mSouthwest
Deal found 7/29$259
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/231:30 pmTUS - ONT
1 stop7h 13mUnited Airlines
Tue 8/265:10 amONT - TUS
1 stop7h 18mUnited Airlines
Deal found 7/29$287
This American Airlines deal was found by Cheapflights users on 7/31. 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 10/1410:21 amFLG - ONT
1 stop5h 03mAmerican Airlines
Wed 10/221:00 pmONT - FLG
1 stop4h 57mAmerican Airlines
Deal found 7/31$336
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 11/126:00 amTUS - ONT
1 stop10h 17mAlaska Airlines
Mon 11/174:11 pmONT - TUS
1 stop22h 28mAlaska Airlines
Deal found 7/29$342

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 31, 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

Mon 8/18

7:45 pm-8:52 pm

Nonstop1h 07m

Ontario

Wed 8/20

8:00 am-9:13 am

Nonstop1h 13m

$78

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 8/26

4:39 pm-5:52 pm

Nonstop1h 13m

Ontario

Tue 9/2

12:22 pm-1:39 pm

Nonstop1h 17m

$97

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Thu 8/21

9:55 am-11:05 am

Nonstop1h 10m

Ontario

Mon 8/25

5:05 pm-6:15 pm

Nonstop1h 10m

$97

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 8/26

1:00 pm-5:35 pm

1 stop4h 35m

Ontario

Wed 8/27

3:35 pm-4:55 pm

Nonstop1h 20m

$107

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 11/4

7:25 pm-11:50 pm

1 stop5h 25m

Ontario

Thu 11/6

7:35 pm-12:28 am

1 stop3h 53m

$156

TucsonOntario

TUS - ONT

TUSONT

Tucson

Sat 8/23

5:50 am-12:14 pm

1 stop6h 24m

Ontario

Mon 8/25

4:50 pm-9:27 pm

1 stop4h 37m

$195

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

$198

TucsonOntario

TUS - ONT

TUSONT

Tucson

Fri 8/29

5:14 pm-9:39 pm

1 stop4h 25m

Ontario

Mon 9/1

6:17 am-9:29 am

1 stop3h 12m

$232

TucsonOntario

TUS - ONT

TUSONT

Tucson

Wed 8/20

5:40 am-1:10 pm

2 stops7h 30m

Ontario

Wed 8/20

2:10 pm-8:20 pm

1 stop6h 10m

$259

TucsonOntario

TUS - ONT

TUSONT

Tucson

Sat 8/23

1:30 pm-8:43 pm

1 stop7h 13m

Ontario

Tue 8/26

5:10 am-12:28 pm

1 stop7h 18m

$287

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 25 results
1
2
3

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 July 31, 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 July 31, 2025.

The most flights from USAZ to ONT are scheduled on a Monday (11 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

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 July 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Arizona to Ontario have to say. 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

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

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

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

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
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

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
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

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
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

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 Frontier ($40), American Airlines ($49), and Southwest ($49).

  • 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: Envoy Air (100%), American Airlines (85%), SkyWest Airlines (84%).

  • What are the cheapest flights from Arizona to Ontario?

    Looking at all options, your cheapest flight can be booked for $85. While the most popular route (Las Vegas Harry Reid Intl - Ontario) can be booked for $46 on average our data indicates $292 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$52Average$152FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$122Average$341FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$124Average$265FlexibilityNo cancel feeOn-time63%

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