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Sky Harbor Intl

$72+ Cheap flights from Ontario (ONT) to Sky Harbor Intl (PHX)

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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Oct 25 — Nov 11
Sat 10/25
Sat 11/1
1 adult, Economy
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Find cheap flights from Ontario to Sky Harbor Intl with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ontario to Phoenix Sky Harbor Intl are usually found in August or September, booked 71 days in advance, depart on a Wednesday or Friday and return on a Monday

Cheap flight deals from Ontario to Sky Harbor Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Sky Harbor Intl (PHX). 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 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$139
(Frontier)

One-way from

$72
(Gotogate)

Popular in

July

Cheapest in

August

Average price

$220

Good round-trip deal

$285 or less

Good one-way deal

$146 or less
Provider with most accurate pricing for Ontario-Phoenix Sky Harbor Intl flight deals.
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Provider most trusted by Cheapflights users for Ontario-Phoenix Sky Harbor Intl flights.
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From Ontario to Phoenix Sky Harbor Intl
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One-way flight from Ontario to Phoenix Sky Harbor Intl
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Highest demand for flights based on searches. 0% potential increase in price ($1 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% 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 Ontario to Phoenix Sky Harbor Intl.
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Price to beat on a one-way flight from Ontario to Phoenix Sky Harbor Intl.
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Find flight deals from Ontario to Sky Harbor Intl

Cheapest flights from Ontario to Sky Harbor Intl
Explore the most affordable flight options available from Ontario to Sky Harbor Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2025.

This Frontier deal was found by Cheapflights users on 9/23. 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 10/258:00 amONT - PHX
1 stop4h 23mFrontier
Sat 10/254:14 pmPHX - ONT
1 stop7h 36mFrontier
Deal found 9/23$139
This Frontier deal was found by Cheapflights users on 9/24. 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 10/188:00 amONT - PHX
1 stop4h 23mFrontier
Sat 10/184:14 pmPHX - ONT
1 stop7h 36mFrontier
Deal found 9/24$140
This Cheapflightsfares deal was found by Cheapflights users on 9/23. 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.
Thu 10/306:00 amONT - PHX
1 stop3h 17mFrontier
Sun 11/29:35 amPHX - ONT
1 stop4h 16mFrontier
Deal found 9/23$143
This Priceline deal was found by Cheapflights users on 9/23. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/64:08 pmONT - PHX
1 stop6h 46mFrontier
Fri 10/105:45 amPHX - ONT
1 stop6h 02mFrontier
Deal found 9/23$144
This Gotogate deal was found by Cheapflights users on 9/24. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:54 pmONT - PHX
1 stop4h 47mFrontier
Mon 10/204:55 pmPHX - ONT
1 stop7h 17mFrontier
Deal found 9/24$145
This Frontier deal was found by Cheapflights users on 9/24. 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 9/248:59 pmONT - PHX
1 stop10h 33mFrontier
Sun 9/288:40 pmPHX - ONT
1 stop10h 37mFrontier
Deal found 9/24$146
This CheapOair deal was found by Cheapflights users on 9/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2610:28 pmONT - PHX
1 stop18h 04mFrontier
Sun 9/287:40 amPHX - ONT
1 stop7h 44mFrontier
Deal found 9/23$150
This Booking.com deal was found by Cheapflights users on 9/24. 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 9/257:30 pmONT - PHX
1 stop3h 12mFrontier
Sun 9/286:00 amPHX - ONT
1 stop25h 53mFrontier
Deal found 9/24$151
This Orbitz deal was found by Cheapflights users on 9/24. 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.
Wed 9/248:59 pmONT - PHX
1 stop10h 33mFrontier
Fri 9/267:25 amPHX - ONT
1 stop11h 10mFrontier
Deal found 9/24$154
This Kiwi.com deal was found by Cheapflights users on 9/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:51 pmONT - PHX
1 stop14h 27mFrontier
Tue 12/99:11 pmPHX - ONT
1 stop24h 53mFrontier
Deal found 9/25$155
This CheapOair deal was found by Cheapflights users on 9/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/268:59 pmONT - PHX
1 stop24h 54mFrontier
Tue 9/308:00 amPHX - ONT
1 stop11h 54mFrontier
Deal found 9/23$156
This Booking.com deal was found by Cheapflights users on 9/23. 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.
Tue 9/238:59 pmONT - PHX
1 stop24h 54mFrontier
Sat 9/275:07 pmPHX - ONT
1 stop14h 16mFrontier
Deal found 9/23$157

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Sky Harbor Intl 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 25, 2025.
Use the filters below to find and compare flights from Ontario to Phoenix Sky Harbor Intl Airport that are best for you.

Fly from

Ontario

Fly to

Sky Harbor Intl

Route

Depart

Return

Price

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 10/16

4:17 pm-11:16 pm

1 stop6h 59m

Phoenix Sky Harbor Intl

Thu 10/23

5:45 am-9:10 am

1 stop3h 25m

$143

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 11/13

12:05 pm-7:33 pm

1 stop6h 28m

Phoenix Sky Harbor Intl

Fri 11/14

10:17 am-12:51 pm

1 stop3h 34m

$143

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 11/7

1:46 pm-11:03 pm

1 stop8h 17m

Phoenix Sky Harbor Intl

Sun 11/9

9:35 am-12:51 pm

1 stop4h 16m

$143

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 11/8

12:05 pm-8:47 pm

1 stop7h 42m

Phoenix Sky Harbor Intl

Mon 11/10

9:17 am-12:51 pm

1 stop4h 34m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 10/17

6:53 am-6:21 pm

1 stop11h 28m

Phoenix Sky Harbor Intl

Sun 10/19

9:59 pm-9:35 am

1 stop11h 36m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 10/8

6:53 am-6:21 pm

1 stop11h 28m

Phoenix Sky Harbor Intl

Sun 10/12

9:59 pm-9:35 am

1 stop11h 36m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 10/11

1:37 pm-11:41 pm

1 stop10h 04m

Phoenix Sky Harbor Intl

Thu 10/16

5:45 am-11:47 am

1 stop6h 02m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 10/22

6:53 am-3:04 pm

1 stop8h 11m

Phoenix Sky Harbor Intl

Sat 10/25

4:14 pm-11:50 pm

1 stop7h 36m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 10/23

4:17 pm-11:16 pm

1 stop6h 59m

Phoenix Sky Harbor Intl

Sun 10/26

8:03 pm-11:47 am

1 stop15h 44m

$150

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 10/24

5:15 pm-8:48 pm

1 stop3h 33m

Phoenix Sky Harbor Intl

Sun 10/26

8:03 pm-11:47 am

1 stop15h 44m

$150

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/25

Showing 1-10 of 23 results
1
2
3

Compare providers for flights from Ontario to Sky Harbor Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Sky Harbor Intl in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*3 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Phoenix Sky Harbor Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Phoenix Sky Harbor Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Phoenix Sky Harbor Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Phoenix Sky Harbor Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Phoenix Sky Harbor Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Ontario to Phoenix Sky Harbor Intl Airport 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 Ontario to Phoenix Sky Harbor Intl Airport trip
Airports
ONT

ONT offers quick security checks at both terminals, making it a convenient choice for domestic flights.

Read more about ONTby Bill Fink
PHX

For a quick commute to downtown Phoenix, take the free PHX Sky Train to 44th Street Station, then the light rail.

Read more about PHXby Brandon Schultz
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 Ontario to Sky Harbor Intl

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

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Sky Harbor Intl. Price data was last updated on September 19, 2025.

Booking 71 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Phoenix Sky Harbor Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario to Phoenix Sky Harbor Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Ontario to Phoenix Sky Harbor Intl Airport (average of $258). Flying from Ontario to Phoenix Sky Harbor Intl Airport 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 PHX?

Find hourly flight availability from Ontario to Sky Harbor Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 25, 2025.

It’s optimal to fly from Ontario to Phoenix Sky Harbor Intl Airport at noon. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to Sky Harbor Intl. Price data was last updated on September 21, 2025.

Travelers seeking maximum savings on their Ontario to Phoenix Sky Harbor Intl Airport 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 Sky Harbor Intl

Get insights into the airlines that provide service to Sky Harbor Intl. 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 Sky Harbor Intl. Reviews last updated September 25, 2025.
Read through reviews of airlines operating flights from Ontario to Phoenix Sky Harbor Intl Airport, 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
4,246 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

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
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

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
4,246 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

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
3,162 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

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 Ontario to Sky Harbor Intl. 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 Sky Harbor Intl?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Phoenix Sky Harbor Intl from Ontario. Booking flights from Ontario (ONT) to Phoenix Sky Harbor Intl should be relatively easy as there are 7 daily outbound flights to Phoenix Sky Harbor Intl from 3 different airlines.

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

    Departing from Ontario to Phoenix Sky Harbor Intl Airport will take you 6h 59m. Ontario and Phoenix Sky Harbor Intl Airport are separated by a distance of 324 mi.

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

    Currently priced at $64, Frontier will fly you from Ontario to Phoenix Sky Harbor Intl Airport and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and American Airlines - these airlines can fly you to your destination from $97 and $125, respectively. Frontier is 74% cheaper than the average price of flights available within the next 90 days to this destination.

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

    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 Ontario to Phoenix Sky Harbor Intl Airport on time: American Airlines (87%), SkyWest Airlines (87%), Southwest (86%).

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

    On average you can expect to pay $570 for a flight from Ontario to Phoenix Sky Harbor Intl Airport. The cheapest flight overall is $48 while the most popular route, (Ontario - Phoenix Sky Harbor Intl) is currently priced at $143.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Ontario to Phoenix Sky Harbor Intl Airport (average of $258). Flying from Ontario to Phoenix Sky Harbor Intl Airport 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

Traveling to a place near Phoenix Sky Harbor Intl Airport?

Book flights to Phoenix Sky Harbor Intl Airport if you plan to visit one of these locations
Payson
Chandler
Globe
Goodyear
Glendale
Casa Grande
Buckeye
Camp Verde
Peoria
Surprise
Paradise Valley
Avondale
Guadalupe

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Top 3 airlines flying from Ontario to Sky Harbor Intl

Discover the top 3 airlines that operate flights from Ontario to Sky Harbor Intl. 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 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$64Average$162FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$97Average$262FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$125Average$287FlexibilityNo cancel feeOn-time71%

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