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$35+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Round-trip from

$71
(Cheapflightsfares)

One-way from

$37
(Cheapflightsfares)

Popular in

June

Cheapest in

September

Average price

$141

Good round-trip deal

$325 or less

Good one-way deal

$172 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. 10% potential increase in price ($16 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 May 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 May 1, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/92:28 pmONT - LAS
Nonstop1h 11mFrontier
Tue 5/1311:00 amLAS - ONT
Nonstop1h 08mFrontier
Deal found 4/30$71
This Frontier deal was found by Cheapflights users on 4/29. 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.
Mon 5/1212:59 amONT - PHX
1 stop11h 08mFrontier
Tue 5/201:17 pmPHX - ONT
1 stop10h 42mFrontier
Deal found 4/29$170
This Frontier deal was found by Cheapflights users on 4/29. 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.
Wed 5/712:08 amONT - TUS
1 stop11h 09mFrontier
Sun 5/1112:06 pmTUS - ONT
1 stop11h 53mFrontier
Deal found 4/29$200
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 5/146:01 amONT - LAS
1 stop2h 57mAmerican Airlines
Sat 5/175:03 pmLAS - ONT
1 stop4h 54mAmerican Airlines
Deal found 4/30$209
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/186:23 amONT - PHX
Nonstop1h 16mAmerican Airlines
Sat 6/218:25 pmPHX - ONT
Nonstop1h 13mAmerican Airlines
Deal found 4/29$224
This Southwest deal was found by Cheapflights users on 4/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/3011:50 amONT - PHX
Nonstop1h 15mSouthwest
Sat 5/3110:05 amPHX - ONT
1 stop7h 20mSouthwest
Deal found 4/30$225
This Southwest deal was found by Cheapflights users on 4/29. 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.
Fri 8/296:20 pmONT - LAS
1 stop4h 55mSouthwest
Sun 8/319:15 pmLAS - ONT
Nonstop1h 00mSouthwest
Deal found 4/29$226
This Orbitz deal was found by Cheapflights users on 4/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/36:00 amONT - LAS
1 stop6h 57mMultiple Airlines
Thu 6/512:59 amLAS - ONT
1 stop8h 13mMultiple Airlines
Deal found 4/30$227
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/286:00 amONT - TUS
1 stop4h 38mDelta
Fri 5/305:50 amTUS - ONT
1 stop6h 25mDelta
Deal found 4/29$237
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/211:14 pmONT - TUS
1 stop5h 34mAmerican Airlines
Sat 5/245:30 amTUS - ONT
1 stop3h 31mAmerican Airlines
Deal found 4/29$244
This Southwest deal was found by Cheapflights users on 4/29. 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.
Sat 8/91:55 pmONT - TUS
2 stops6h 50mSouthwest
Tue 8/125:40 amTUS - ONT
1 stop4h 30mSouthwest
Deal found 4/29$256
This Expedia deal was found by Cheapflights users on 4/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1812:59 amONT - PHX
1 stop7h 25mMultiple Airlines
Wed 5/217:00 amPHX - ONT
2 stops11h 25mMultiple Airlines
Deal found 4/29$262

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 May 1, 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

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Fri 5/23

6:00 am-7:16 am

Nonstop1h 16m

Las Vegas Harry Reid Intl

Fri 5/23

10:35 am-11:43 am

Nonstop1h 08m

$71

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 5/13

12:59 am-12:07 pm

1 stop11h 08m

Phoenix Sky Harbor Intl

Wed 5/21

1:17 pm-11:08 pm

1 stop9h 51m

$170

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 5/28

7:55 am-9:00 am

Nonstop1h 05m

Las Vegas Harry Reid Intl

Wed 6/4

10:40 am-3:35 pm

2 stops4h 55m

$172

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 5/24

10:00 am-11:19 am

Nonstop1h 19m

Phoenix Sky Harbor Intl

Sun 5/25

10:31 am-11:50 am

Nonstop1h 19m

$199

OntarioTucson

ONT - TUS

ONTTUS

Ontario

Wed 5/7

12:08 am-11:17 am

1 stop11h 09m

Tucson

Sun 5/11

12:06 pm-11:59 pm

1 stop11h 53m

$200

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 5/22

1:14 pm-4:23 pm

1 stop3h 09m

Las Vegas Harry Reid Intl

Sun 5/25

9:55 am-3:49 pm

1 stop5h 54m

$219

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 5/30

11:50 am-1:05 pm

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sat 5/31

10:05 am-5:25 pm

1 stop7h 20m

$225

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 6/3

6:00 am-12:57 pm

1 stop6h 57m

Las Vegas Harry Reid Intl

Thu 6/5

12:59 am-9:12 am

1 stop8h 13m

$227

OntarioTucson

ONT - TUS

ONTTUS

Ontario

Wed 5/28

6:00 am-10:38 am

1 stop4h 38m

Tucson

Thu 5/29

4:55 pm-11:42 pm

1 stop6h 47m

$237

OntarioTucson

ONT - TUS

ONTTUS

Ontario

Wed 5/21

1:14 pm-6:48 pm

1 stop5h 34m

Tucson

Sat 5/24

5:30 am-9:01 am

1 stop3h 31m

$244

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 40 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, January is the cheapest month in which you can book a flight from Ontario to Arizona (average of $258). Flying from Ontario to Arizona in March is currently the most expensive (average of $337). 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 May 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Arizona as you normally would.

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 May 1, 2025.

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

Rainfall in Arizona by month

Plan your trip to Arizona by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Arizona ranges from 0.0 - 1.1 inches per month. July is typically the wettest month, when rainfall can reach 1.1 in. June is typically the driest time to visit Arizona when rainfall is around 0.0 in.

Temperature in Arizona by month

Plan your trip to Arizona by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Arizona, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 95.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 55.4 F).

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 May 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Ontario to Arizona. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

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
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

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
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

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
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,408 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

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 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.

  • 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 $37. However, be on the lookout for offers from Southwest 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 Envoy Air (94%), Southwest (89%) and American Airlines (89%).

  • What are the cheapest flights from Ontario to Arizona?

    Looking at all options, your cheapest flight can be booked for $99. While the most popular route (Ontario - Las Vegas Harry Reid Intl) can be booked for $55 on average our data indicates $820 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, January is the cheapest month in which you can book a flight from Ontario to Arizona (average of $258). Flying from Ontario to Arizona in March is currently the most expensive (average of $337). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$39Average$94FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$111Average$306FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$126Average$398FlexibilityNo cancel feeOn-time71%

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