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$59+ Cheap flights from Ontario (ONT) to Phoenix

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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Aug 10 — Aug 171
Mon 8/10
Mon 8/17
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Phoenix are usually found in September or August, booked 73 days in advance, depart on a Wednesday or Tuesday and return on a Saturday

Cheap flight deals from Ontario to Phoenix

Cheapest flights from Ontario to Phoenix
Explore the most affordable flight options available from Ontario to Phoenix. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 11, 2026.

This Southwest deal was found by Cheapflights users on 7/10. 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 8/85:50 am
ONT
-
PHX
Nonstop1h 15m
Southwest
Sat 8/1510:00 am
PHX
-
ONT
Nonstop1h 15m
Southwest
Deal found 7/10$117
This American Airlines deal was found by Cheapflights users on 7/10. 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 9/301:04 pm
ONT
-
PHX
Nonstop1h 21m
American Airlines
Thu 10/19:26 pm
PHX
-
ONT
Nonstop1h 17m
American Airlines
Deal found 7/10$119
This American Airlines deal was found by Cheapflights users on 7/7. 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 8/126:15 am
ONT
-
PHX
Nonstop1h 23m
American Airlines
Sat 8/1510:45 am
PHX
-
ONT
Nonstop1h 18m
American Airlines
Deal found 7/7$129
This Southwest deal was found by Cheapflights users on 7/8. 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 8/62:40 pm
ONT
-
PHX
Nonstop1h 20m
Southwest
Mon 8/108:05 am
PHX
-
ONT
Nonstop1h 15m
Southwest
Deal found 7/8$131
This Southwest deal was found by Cheapflights users on 7/10. 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 8/262:10 pm
ONT
-
PHX
1 stop3h 25m
Southwest
Mon 8/317:05 am
PHX
-
ONT
1 stop4h 20m
Southwest
Deal found 7/10$137
This Southwest deal was found by Cheapflights users on 7/7. 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 9/196:55 am
ONT
-
PHX
1 stop6h 25m
Southwest
Mon 9/218:05 am
PHX
-
ONT
Nonstop1h 15m
Southwest
Deal found 7/7$139
This Southwest deal was found by Cheapflights users on 7/10. 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 8/75:15 am
ONT
-
PHX
Nonstop1h 15m
Southwest
Tue 8/117:45 pm
PHX
-
ONT
Nonstop1h 10m
Southwest
Deal found 7/10$140

Find flight deals from Ontario to Phoenix

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Phoenix (PH1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 11, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$117
(Southwest)

One-way from

$59
(Southwest)

Popular in

July

Cheapest in

September

Average price

$344
Provider with most accurate pricing for Los Angeles-Phoenix flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Phoenix flights.
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From Ontario to Phoenix
Search Deals
One-way flight from Ontario to Phoenix
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Phoenix 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 11, 2026.
Use the filters below to find and compare flights from Ontario to Phoenix that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 8/8

2:55 pm-6:10 pm

1 stop3h 15m

Phoenix Sky Harbor Intl

Sat 8/15

10:00 am-11:15 am

Nonstop1h 15m

$127

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 8/12

6:40 am-8:05 am

Nonstop1h 25m

Phoenix Sky Harbor Intl

Sat 8/15

9:20 am-4:25 pm

1 stop7h 05m

$141

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 10/9

3:55 pm-8:10 pm

1 stop4h 15m

Phoenix Sky Harbor Intl

Wed 10/14

6:45 am-1:25 pm

2 stops6h 40m

$172

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 8/7

12:00 pm-4:15 pm

1 stop4h 15m

Phoenix Sky Harbor Intl

Fri 8/14

6:50 am-12:10 pm

1 stop5h 20m

$183

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 8/5

6:40 am-8:05 am

Nonstop1h 25m

Phoenix Sky Harbor Intl

Sat 8/8

12:55 pm-6:20 pm

1 stop5h 25m

$204

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 8/20

12:00 pm-4:15 pm

1 stop4h 15m

Phoenix Sky Harbor Intl

Sat 8/22

1:25 pm-8:05 pm

2 stops6h 40m

$222

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 8/28

4:50 pm-6:10 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Sun 8/30

5:05 pm-10:00 pm

1 stop4h 55m

$266
Quickest round-trip

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 9/27

2:30 pm-3:45 pm

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sun 10/11

8:45 pm-10:00 pm

Nonstop1h 15m

$349

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 8/13

6:08 am-10:26 am

1 stop4h 18m

Phoenix Sky Harbor Intl

Thu 8/13

3:19 pm-8:53 pm

1 stop5h 34m

$384

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 7/31

5:15 pm-6:35 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Sun 8/2

5:10 pm-11:15 pm

1 stop6h 05m

$391

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Ontario to Phoenix

Have a flexible travel schedule? Discover the best time to fly to Phoenix 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 Phoenix

What is the cheapest month to book a flight from Ontario to Phoenix?

Currently, January is the cheapest month in which you can book a flight from Ontario to Phoenix (average of $29). Flying from Ontario to Phoenix in December is currently the most expensive (average of $149). 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 PHX?

Find hourly flight availability from Ontario to Phoenix. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 11, 2026.

It’s optimal to fly from Ontario to Phoenix at noon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the evening.

Weekly flight availability from Ontario to Phoenix

Explore weekly flight availability from Ontario to Phoenix. 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 11, 2026.

The most flights from ONT to PH1 are scheduled on a Tuesday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

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

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

The best time to book flights from Ontario to Phoenix is 40 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to Phoenix. Price data was last updated on July 11, 2026.

Travelers seeking maximum savings on their Ontario to Phoenix 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.

Reviews of airlines servicing Phoenix

Get insights into the airlines that provide service to Phoenix. 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 Phoenix. Reviews last updated July 11, 2026.
Read reviews from past customers who have flown Southwest,American Airlines, andJetBlue from Ontario to Phoenix. 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
7.9
Good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Southwest
7.9
Good
4,248 reviews
Southwest
7.9
Good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
American Airlines
7.1
Good
11,807 reviews
Southwest
7.9
Good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
JetBlue
7.1
Good
3,016 reviews
Southwest
7.9
Good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Frontier
5.6
Fair
2,833 reviews
Southwest
7.9
Good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Phoenix. 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 Phoenix?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Phoenix from Ontario. Booking flights from Ontario (ONT) to Phoenix should be relatively easy as there are 7 daily outbound flights to Phoenix from 4 different airlines.

  • How long is the flight from Ontario to Phoenix?

    For as low as $127, Southwest can have you in Phoenix from Ontario in 3h 15m. There are 324 mi between Ontario and Phoenix.

  • What are the cheapest airlines flying from Ontario to Phoenix round-trip?

    Frontier, at $72, was found to be the cheapest airline from Ontario to Phoenix.Alternate airlines to your destination round-trip include Southwest and American Airlines. Frontier is 73% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Ontario to Phoenix 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 American Airlines and Frontier, as they are both options that can get you from Ontario to Phoenix for a low price.

  • What are the most reliable airlines from Ontario to Phoenix?

    Before booking your flight to Phoenix from Ontario, check out the most reliable airlines to get you to your destination on time: Porter Airlines (95%), American Airlines (91%), Envoy Air( 89%).

  • What are the cheapest flights from Ontario to Phoenix?

    Looking at all options, your cheapest flight can be booked for $90. While the most popular route (Ontario - Phoenix Sky Harbor Intl) can be booked for $117 on average, our data indicates $515 when flying from Ontario to Phoenix.

  • Can I find deals for flights from Ontario to Phoenix that include hotel bookings?

    Yes. In addition to deals on Ontario to Phoenix flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Phoenix?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Phoenix.

  • Can I find deals for business class flights from Ontario to Phoenix?

    Yes. Cheapflights offers flight deals from Ontario to Phoenix 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 Phoenix?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Phoenix (average of $29). Flying from Ontario to Phoenix in December is currently the most expensive (average of $149). 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 4 airlines flying from Ontario to Phoenix

Discover the top 4 airlines that operate flights from Ontario to Phoenix. 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 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$163FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$114Average$267FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$125Average$302FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$228Average$308FlexibilityNo cancel feeOn-time62%

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