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Sky Harbor Intl

$64+ 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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
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

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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

Cheap 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 December 28, 2025.

This Super.com deal was found by Cheapflights users on 12/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:45 amONT - PHX
1 stop6h 48mFrontier
Mon 1/59:58 amPHX - ONT
1 stop12h 19mFrontier
Deal found 12/26$317
This Super.com deal was found by Cheapflights users on 12/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:45 amONT - PHX
1 stop6h 48mFrontier
Mon 1/59:58 amPHX - ONT
1 stop12h 19mFrontier
Deal found 12/26$320
This Frontier deal was found by Cheapflights users on 12/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:45 amONT - PHX
1 stop6h 48mFrontier
Wed 1/74:41 pmPHX - ONT
1 stop7h 33mFrontier
Deal found 12/26$323
This Frontier deal was found by Cheapflights users on 12/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:14 amONT - PHX
1 stop10h 43mFrontier
Fri 1/96:30 amPHX - ONT
1 stop8h 09mFrontier
Deal found 12/26$337
This Travelocity deal was found by Cheapflights users on 12/26. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:45 amONT - PHX
1 stop6h 48mFrontier
Fri 1/210:26 pmPHX - ONT
1 stop19h 05mFrontier
Deal found 12/26$363
This CheapOair deal was found by Cheapflights users on 12/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:45 amONT - PHX
1 stop6h 48mFrontier
Fri 1/27:00 amPHX - ONT
1 stop17h 59mFrontier
Deal found 12/26$364
This Expedia deal was found by Cheapflights users on 12/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:00 pmONT - PHX
1 stop13h 48mFrontier
Fri 1/29:31 amPHX - ONT
1 stop15h 28mFrontier
Deal found 12/26$369
This CheapOair deal was found by Cheapflights users on 12/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:45 amONT - PHX
1 stop24h 36mFrontier
Sun 1/410:31 pmPHX - ONT
1 stop26h 28mFrontier
Deal found 12/26$370
This Frontier deal was found by Cheapflights users on 12/25. 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.
Sun 12/284:41 pmONT - PHX
1 stop6h 56mFrontier
Thu 1/19:58 amPHX - ONT
1 stop8h 24mFrontier
Deal found 12/25$372
This Super.com deal was found by Cheapflights users on 12/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:45 amONT - PHX
1 stop6h 48mFrontier
Sun 1/49:58 amPHX - ONT
1 stop8h 44mFrontier
Deal found 12/26$380
This Mytrip deal was found by Cheapflights users on 12/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/273:27 pmONT - PHX
1 stop8h 10mFrontier
Fri 1/27:00 amPHX - ONT
1 stop17h 59mFrontier
Deal found 12/26$383

Find 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 December 28, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$128
(Frontier)

One-way from

$64
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$361

Good round-trip deal

$344 or less

Good one-way deal

$171 or less
Provider with most accurate pricing for Ontario-Phoenix Sky Harbor Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Phoenix Sky Harbor Intl flights.
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From Ontario to Phoenix Sky Harbor Intl
Search Deals
One-way flight from Ontario to Phoenix Sky Harbor Intl
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ontario to Phoenix Sky Harbor Intl.
Search Deals
Price to beat on a one-way flight from Ontario to Phoenix Sky Harbor Intl.
Search Deals

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 December 28, 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

Fri 2/27

6:00 am-8:12 am

1 stop25h 12m

Phoenix Sky Harbor Intl

Sun 3/1

10:32 pm-1:11 pm

1 stop15h 39m

$148

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 1/17

9:10 pm-8:20 am

1 stop10h 10m

Phoenix Sky Harbor Intl

Tue 1/20

8:30 am-3:07 pm

1 stop7h 37m

$162

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 1/10

7:00 am-1:06 pm

1 stop5h 06m

Phoenix Sky Harbor Intl

Mon 1/12

6:30 am-1:39 pm

1 stop8h 09m

$163

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 2/21

8:21 am-4:32 pm

1 stop7h 11m

Phoenix Sky Harbor Intl

Sun 2/22

8:15 am-1:13 pm

1 stop5h 58m

$181

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 1/31

5:50 am-8:05 am

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sat 1/31

11:05 am-11:25 am

Nonstop1h 20m

$191

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 1/31

6:00 am-11:20 am

1 stop4h 20m

Phoenix Sky Harbor Intl

Sat 1/31

4:36 pm-10:53 pm

1 stop7h 17m

$191

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 2/4

7:15 am-1:40 pm

1 stop5h 25m

Phoenix Sky Harbor Intl

Sun 2/8

9:30 am-1:53 pm

1 stop5h 23m

$197

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 3/13

9:06 am-12:43 am

1 stop15h 37m

Phoenix Sky Harbor Intl

Tue 3/17

12:54 pm-12:01 am

1 stop11h 07m

$199

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 2/18

7:50 pm-10:12 pm

Nonstop1h 22m

Phoenix Sky Harbor Intl

Tue 2/24

4:10 pm-4:26 pm

Nonstop1h 16m

$211

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 1/21

5:45 pm-8:00 pm

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sat 1/24

11:05 am-11:25 am

Nonstop1h 20m

$211

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 20 results
1
2

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
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 CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Ontario-Phoenix Sky Harbor Intl Airport flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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.

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 December 26, 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 $38). Flying from Ontario to Phoenix Sky Harbor Intl Airport in July is currently the most expensive (average of $85). 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 December 28, 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 13% 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 December 20, 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.

How much does it cost to fly round-trip from Ontario to Phoenix Sky Harbor Intl Airport?

The best insider tips for Ontario to Phoenix Sky Harbor Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
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

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 December 28, 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
4,250 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,071 reviews
Southwest
8.0
Very good
4,250 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Frontier
5.8
Fair
3,064 reviews
Southwest
8.0
Very good
4,250 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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 10 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 1h 15m. Ontario and Phoenix Sky Harbor Intl Airport are separated by a distance of 324 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Currently priced at $49, 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 $122, respectively. Frontier is 80% 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 Sky Harbor Intl Airport one-way?

    $48 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Frontier and American Airlines, with prices starting from $49 and $58, respectively.

  • 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: Porter Airlines (90%), British Airways (81%), American Airlines (79%).

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

    On average you can expect to pay $1,138 for a flight from Ontario to Phoenix Sky Harbor Intl Airport. The cheapest flight overall is $109 while the most popular route, (Ontario - Phoenix Sky Harbor Intl) is currently priced at $129.

  • 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 $38). Flying from Ontario to Phoenix Sky Harbor Intl Airport in July is currently the most expensive (average of $85). 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
Goodyear
Paradise Valley
Glendale
Casa Grande
Chandler
Globe
Peoria
Payson
Camp Verde
Buckeye
Surprise
Avondale
Guadalupe

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Alternative routes for Ontario to Sky Harbor Intl

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 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$67Average$157FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$97Average$260FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$122Average$300FlexibilityNo cancel feeOn-time71%

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