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$49+ Cheap flights from Sky Harbor Intl (PHX) 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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Ontario are usually found in August or October, booked 74 days in advance, depart on a Saturday or Monday and return on a Wednesday

Cheap flight deals from Sky Harbor Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Sky Harbor Intl (PHX) to Ontario (ONT). 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 September 17, 2025.

Round-trip from

$97
(American Airlines)

One-way from

$49
(American Airlines)

Popular in

December

Cheapest in

August

Average price

$209

Good round-trip deal

$117 or less

Good one-way deal

$99 or less
From Phoenix Sky Harbor Intl to Ontario
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One-way flight from Phoenix Sky Harbor Intl to Ontario
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Highest demand for flights based on searches. 8% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Ontario.
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Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Ontario.
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Find flight deals from Sky Harbor Intl to Ontario

Cheapest flights from Sky Harbor Intl to Ontario
Explore the most affordable flight options available from Sky Harbor Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This American Airlines deal was found by Cheapflights users on 9/17. 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 10/238:03 amPHX - ONT
Nonstop1h 16mAmerican Airlines
Mon 10/2710:09 amONT - PHX
Nonstop1h 21mAmerican Airlines
Deal found 9/17$97
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/302:46 pmPHX - ONT
Nonstop1h 14mAmerican Airlines
Thu 11/612:55 pmONT - PHX
Nonstop1h 23mAmerican Airlines
Deal found 9/14$98
This American Airlines deal was found by Cheapflights users on 9/17. 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 10/98:34 pmPHX - ONT
Nonstop1h 15mAmerican Airlines
Mon 10/134:49 pmONT - PHX
Nonstop1h 18mAmerican Airlines
Deal found 9/17$99
This Southwest deal was found by Cheapflights users on 9/17. 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 10/237:40 amPHX - ONT
Nonstop1h 20mSouthwest
Mon 10/273:05 pmONT - PHX
1 stop6h 05mSouthwest
Deal found 9/17$107
This Southwest deal was found by Cheapflights users on 9/15. 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 10/136:25 amPHX - ONT
1 stop5h 45mSouthwest
Wed 10/153:50 pmONT - PHX
1 stop5h 25mSouthwest
Deal found 9/15$117
This Southwest deal was found by Cheapflights users on 9/16. 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 10/177:40 amPHX - ONT
Nonstop1h 20mSouthwest
Mon 10/205:20 amONT - PHX
Nonstop1h 10mSouthwest
Deal found 9/16$134
This Frontier deal was found by Cheapflights users on 9/16. 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.
Thu 10/235:45 amPHX - ONT
1 stop3h 25mFrontier
Thu 10/2312:32 pmONT - PHX
1 stop9h 55mFrontier
Deal found 9/16$139
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 10/38:15 amPHX - ONT
1 stop3h 28mFrontier
Fri 10/105:15 pmONT - PHX
1 stop3h 33mFrontier
Deal found 9/14$143
This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:00 amPHX - ONT
1 stop4h 37mFrontier
Sun 11/24:05 pmONT - PHX
1 stop18h 20mFrontier
Deal found 9/16$145

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sky Harbor Intl 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 September 17, 2025.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Ontario that are best for you.

Fly from

Sky Harbor Intl

Fly to

Ontario

Route

Depart

Return

Price

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 10/18

7:40 pm-8:50 pm

Nonstop1h 10m

Ontario

Mon 10/20

5:20 am-6:30 am

Nonstop1h 10m

$97

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 10/23

7:40 am-9:00 am

Nonstop1h 20m

Ontario

Mon 10/27

3:05 pm-9:10 pm

1 stop6h 05m

$107

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 11/4

9:00 am-1:15 pm

1 stop5h 15m

Ontario

Thu 11/6

8:25 pm-10:45 pm

Nonstop1h 20m

$107

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 10/30

6:25 am-12:10 pm

1 stop5h 45m

Ontario

Mon 11/3

5:55 am-8:10 am

Nonstop1h 15m

$107

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 10/9

4:05 pm-5:20 pm

Nonstop1h 15m

Ontario

Tue 10/14

12:55 pm-7:15 pm

2 stops6h 20m

$112

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 10/17

7:40 am-9:00 am

Nonstop1h 20m

Ontario

Mon 10/20

5:20 am-6:30 am

Nonstop1h 10m

$134

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 10/8

6:00 pm-9:25 pm

1 stop3h 25m

Ontario

Sat 10/11

1:50 pm-3:05 pm

Nonstop1h 15m

$144

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 12/15

9:00 am-9:15 am

Nonstop1h 15m

$49

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 1/15

9:05 pm-9:20 pm

Nonstop1h 15m

$49

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 2/3

9:15 am-2:45 pm

1 stop6h 30m

$59

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 16 results
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The best insider tips for Phoenix Sky Harbor Intl Airport to Ontario flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Phoenix Sky Harbor Intl Airport to Ontario trip
Airports
PHX

PHX offers short security lines; expect waits under 10 minutes, even without TSA PreCheck.

Read more about PHXby Brandon Schultz
ONT

ONT is a convenient alternative to LAX, especially for destinations like Pasadena and Palm Springs.

Read more about ONTby Bill Fink
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on PHX

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more
Bill Fink

Bill Fink

Expert on ONT

Bill Fink

Bill Fink

Bill is an award-winning travel writer with extensive credits covering airlines and the aviation industry for publications including AARP, AFAR, The Points Guy and Yahoo. Based in Portland, Oregon, Bill has traveled to more than 75 countries - and been late for his flight in most of them. He once achieved top-level frequent flier status for all of American, Delta and United Airlines during a single year.

Read more

Best time to book a flight from Sky Harbor Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Sky Harbor Intl 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 Phoenix Sky Harbor Intl Airport to Ontario

How far ahead should I book a flight from Phoenix Sky Harbor Intl Airport to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Sky Harbor Intl to Ontario. Price data was last updated on September 12, 2025.

The best time to book flights from Phoenix Sky Harbor Intl Airport to Ontario is 74 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 month to book a flight from Phoenix Sky Harbor Intl Airport to Ontario?

Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Ontario (average of $246). Flying from Phoenix Sky Harbor Intl Airport to Ontario in March is currently the most expensive (average of $327). 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 PHX to ONT?

Find hourly flight availability from Sky Harbor Intl 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 September 17, 2025.

When flying from Phoenix Sky Harbor Intl Airport to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 7% versus a flight in the morning.

What is the cheapest day to fly from Phoenix Sky Harbor Intl Airport to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Sky Harbor Intl to Ontario. Price data was last updated on September 14, 2025.

Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport to Ontario flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 17, 2025.
Read through reviews of airlines operating flights from Phoenix Sky Harbor Intl Airport to Ontario, such as Southwest, American Airlines, and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,173 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Sky Harbor Intl 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 Phoenix Sky Harbor Intl?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from Phoenix Sky Harbor Intl to Ontario. 3 airlines have flights to Ontario from Phoenix Sky Harbor Intl on a regular basis. Booking flights from Phoenix Sky Harbor Intl to Ontario should not be difficult; the airport handles an average of 7 inbound flights from Phoenix Sky Harbor Intl per day.

  • How long is the flight from Phoenix Sky Harbor Intl Airport to Ontario?

    For as low as $97, Southwest can have you in Ontario from Phoenix Sky Harbor Intl Airport in 1h 10m. Phoenix Sky Harbor Intl Airport and Ontario are separated by a distance of 324 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines flying from Phoenix Sky Harbor Intl Airport to Ontario round-trip?

    Currently priced at $56, Frontier will fly you from Phoenix Sky Harbor Intl Airport to Ontario and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Southwest - these airlines can fly you to your destination from $97 and $106, respectively. Frontier is priced at 76% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from Phoenix Sky Harbor Intl Airport to Ontario?

    Before booking your flight to Ontario from Phoenix Sky Harbor Intl Airport, check out the most reliable airlines to get you to your destination on time: SkyWest Airlines (96%), American Airlines (90%), British Airways( 77%).

  • What are the cheapest flights from Phoenix Sky Harbor Intl Airport to Ontario?

    On average you can expect to pay $192 for a flight from Phoenix Sky Harbor Intl Airport to Ontario. The cheapest flight overall is $48 while the most popular route, (Phoenix Sky Harbor Intl - Ontario) is currently priced at $97.

  • Can I find deals for flights from Sky Harbor Intl to Ontario that include hotel bookings?

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

  • How can I find direct flights from Sky Harbor Intl to Ontario?

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

  • Can I find deals for business class flights from Sky Harbor Intl to Ontario?

    Yes. Cheapflights offers flight deals from Sky Harbor Intl 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 Phoenix Sky Harbor Intl Airport to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Ontario (average of $246). Flying from Phoenix Sky Harbor Intl Airport to Ontario in March is currently the most expensive (average of $327). 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.

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Alternative routes for Sky Harbor Intl to Ontario

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Top 3 airlines flying from Sky Harbor Intl to Ontario

Discover the top 3 airlines that operate flights from Sky Harbor Intl 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$159FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$97Average$266FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$106Average$264FlexibilityNo cancel feeOn-time63%

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