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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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Round-trip from

$80
(Frontier)

One-way from

$41
(Frontier)

Popular in

March

Cheapest in

August

Average price

$157

Good round-trip deal

$147 or less

Good one-way deal

$119 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. 3% potential increase in price ($4 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 March 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 March 28, 2025.

This Frontier deal was found by Cheapflights users on 3/25. 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 4/11:53 pmLAS - ONT
Nonstop1h 11mFrontier
Tue 4/19:39 pmONT - LAS
Nonstop1h 14mFrontier
Deal found 3/25$80
This American Airlines deal was found by Cheapflights users on 3/27. 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 4/177:43 amPHX - ONT
Nonstop1h 16mAmerican Airlines
Mon 4/217:25 pmONT - PHX
Nonstop1h 15mAmerican Airlines
Deal found 3/27$137
This Southwest deal was found by Cheapflights users on 3/27. 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.
Mon 4/287:55 amPHX - ONT
Nonstop1h 15mSouthwest
Tue 4/292:35 pmONT - PHX
1 stop5h 45mSouthwest
Deal found 3/27$147
This Frontier deal was found by Cheapflights users on 3/28. 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 4/265:40 amPHX - ONT
1 stop5h 40mFrontier
Sat 4/262:27 pmONT - PHX
1 stop8h 53mFrontier
Deal found 3/28$153
This Booking.com deal was found by Cheapflights users on 3/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2412:17 pmTUS - ONT
1 stop23h 04mFrontier
Sat 4/2612:59 amONT - TUS
1 stop16h 22mFrontier
Deal found 3/27$168
This American Airlines deal was found by Cheapflights users on 3/26. 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 4/176:00 amLAS - ONT
1 stop5h 59mAmerican Airlines
Sun 4/207:20 pmONT - LAS
1 stop3h 18mAmerican Airlines
Deal found 3/26$199
This Southwest deal was found by Cheapflights users on 3/27. 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 5/97:15 amLAS - ONT
1 stop4h 50mSouthwest
Sun 5/1111:30 amONT - LAS
2 stops5h 25mSouthwest
Deal found 3/27$213
This Delta deal was found by Cheapflights users on 3/27. 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.
Wed 5/284:55 pmTUS - ONT
1 stop6h 47mDelta
Thu 6/56:00 amONT - TUS
1 stop4h 38mDelta
Deal found 3/27$217
This Southwest deal was found by Cheapflights users on 3/27. 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 5/303:35 pmTUS - ONT
1 stop7h 25mSouthwest
Sat 5/315:50 amONT - TUS
2 stops10h 00mSouthwest
Deal found 3/27$242
This United Airlines deal was found by Cheapflights users on 3/26. 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.
Wed 4/233:26 pmTUS - ONT
1 stop7h 29mUnited Airlines
Thu 4/245:00 amONT - TUS
1 stop7h 39mUnited Airlines
Deal found 3/26$277
This Orbitz deal was found by Cheapflights users on 3/27. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/267:00 amPHX - ONT
2 stops8h 32mMultiple Airlines
Sun 4/2712:59 amONT - PHX
1 stop7h 23mMultiple Airlines
Deal found 3/27$331
This Alaska Airlines deal was found by Cheapflights users on 3/27. 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.
Tue 5/69:00 amPHX - ONT
2 stops11h 29mAlaska Airlines
Tue 5/134:29 pmONT - PHX
1 stop7h 30mAlaska Airlines
Deal found 3/27$339

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 March 28, 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 4/1

1:53 pm-3:04 pm

Nonstop1h 11m

Ontario

Tue 4/1

9:39 pm-10:53 pm

Nonstop1h 14m

$80

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 4/17

7:43 am-8:59 am

Nonstop1h 16m

Ontario

Mon 4/21

7:25 pm-8:40 pm

Nonstop1h 15m

$137

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 4/28

7:55 am-9:10 am

Nonstop1h 15m

Ontario

Tue 4/29

2:35 pm-8:20 pm

1 stop5h 45m

$147

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 4/26

5:40 am-11:20 am

1 stop5h 40m

Ontario

Sat 4/26

2:27 pm-11:20 pm

1 stop8h 53m

$153

TucsonOntario

TUS - ONT

TUSONT

Tucson

Thu 4/24

12:17 pm-11:21 am

1 stop23h 04m

Ontario

Sat 4/26

12:59 am-5:21 pm

1 stop16h 22m

$168

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Thu 4/17

6:00 am-11:59 am

1 stop5h 59m

Ontario

Sun 4/20

7:20 pm-10:38 pm

1 stop3h 18m

$199

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Fri 5/9

7:15 am-12:05 pm

1 stop4h 50m

Ontario

Sun 5/11

11:30 am-4:55 pm

2 stops5h 25m

$213

TucsonOntario

TUS - ONT

TUSONT

Tucson

Wed 5/28

5:50 am-12:15 pm

1 stop6h 25m

Ontario

Wed 6/4

10:01 am-4:15 pm

1 stop6h 14m

$217

TucsonOntario

TUS - ONT

TUSONT

Tucson

Fri 5/30

3:35 pm-11:00 pm

1 stop7h 25m

Ontario

Sat 5/31

5:50 am-3:50 pm

2 stops10h 00m

$242

TucsonOntario

TUS - ONT

TUSONT

Tucson

Wed 4/23

3:26 pm-10:55 pm

1 stop7h 29m

Ontario

Thu 4/24

5:00 am-12:39 pm

1 stop7h 39m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 36 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 $326). 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 March 28, 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 March 28, 2025.

The most flights from USAZ to ONT are scheduled on a Thursday (11 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (3 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 March 28, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,897 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,336 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 ($41), Southwest ($59), and American Airlines ($84).

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

    The most popular flight routes from Arizona to Ontario are Phoenix Sky Harbor Intl - Ontario, Las Vegas Harry Reid 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: SkyWest Airlines (100%), Southwest (84%), British Airways (83%).

  • What are the cheapest flights from Arizona to Ontario?

    Looking at all options, your cheapest flight can be booked for $48. While the most popular route (Phoenix Sky Harbor Intl - Ontario) can be booked for $137 on average our data indicates $208 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 $326). 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$40Average$93FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$110Average$312FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$130Average$264FlexibilityNo cancel feeOn-time63%
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