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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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Apr 27 — May 41
Mon 4/27
Mon 5/4
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 Saturday

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 March 28, 2026.

This Frontier deal was found by Cheapflights users on 3/28. 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.
Tue 5/51:50 pm
ONT
-
PHX
1 stop9h 34m
Frontier
Thu 5/74:17 pm
PHX
-
ONT
1 stop7h 32m
Frontier
Deal found 3/28$140
This Booking.com deal was found by Cheapflights users on 3/27. 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.
Wed 4/2211:44 am
ONT
-
PHX
1 stop6h 13m
Frontier
Sun 4/268:07 pm
PHX
-
ONT
1 stop12h 17m
Frontier
Deal found 3/27$141
This CheapOair deal was found by Cheapflights users on 3/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:47 am
ONT
-
PHX
1 stop4h 17m
Frontier
Sun 4/268:07 pm
PHX
-
ONT
1 stop12h 17m
Frontier
Deal found 3/25$146
This Booking.com deal was found by Cheapflights users on 3/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2912:59 am
ONT
-
PHX
1 stop6h 37m
Frontier
Sun 5/37:20 pm
PHX
-
ONT
1 stop12h 44m
Frontier
Deal found 3/25$147
This Expedia deal was found by Cheapflights users on 3/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:59 am
ONT
-
PHX
1 stop6h 37m
Frontier
Sun 4/195:08 am
PHX
-
ONT
1 stop11h 09m
Frontier
Deal found 3/25$150
This CheapOair deal was found by Cheapflights users on 3/27. 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 4/245:33 pm
ONT
-
PHX
1 stop18h 12m
Frontier
Mon 4/279:15 am
PHX
-
ONT
1 stop7h 23m
Frontier
Deal found 3/27$151
This Booking.com deal was found by Cheapflights users on 3/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:59 pm
ONT
-
PHX
1 stop13h 51m
Frontier
Thu 4/309:24 pm
PHX
-
ONT
1 stop10h 07m
Frontier
Deal found 3/26$152
This Trip.com deal was found by Cheapflights users on 3/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2211:44 am
ONT
-
PHX
1 stop6h 13m
Frontier
Fri 4/249:24 pm
PHX
-
ONT
1 stop26h 31m
Frontier
Deal found 3/25$156
This Frontier deal was found by Cheapflights users on 3/26. 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 5/66:00 am
ONT
-
PHX
1 stop9h 23m
Frontier
Sat 5/96:43 pm
PHX
-
ONT
1 stop5h 06m
Frontier
Deal found 3/26$160
This Frontier deal was found by Cheapflights users on 3/24. 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.
Fri 4/106:20 am
ONT
-
PHX
1 stop11h 27m
Frontier
Wed 5/64:29 pm
PHX
-
ONT
1 stop7h 20m
Frontier
Deal found 3/24$161
This Booking.com deal was found by Cheapflights users on 3/24. 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.
Mon 4/1311:10 am
ONT
-
PHX
1 stop3h 35m
Frontier
Tue 4/142:05 pm
PHX
-
ONT
1 stop4h 44m
Frontier
Deal found 3/24$162

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 March 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$140
(Frontier)

One-way from

$64
(iWofly)

Popular in

March

Cheapest in

September

Average price

$328

Good round-trip deal

$349 or less

Good one-way deal

$207 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.
Search Deals
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. 13% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 28, 2026.
Use the filters below to find and compare flights from Ontario to Phoenix Sky Harbor Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 5/5

4:30 pm-10:25 pm

1 stop5h 55m

Phoenix Sky Harbor Intl

Thu 5/14

7:30 am-8:45 am

Nonstop1h 15m

$187

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 4/21

10:30 am-11:45 am

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sat 4/25

1:55 pm-5:40 pm

1 stop3h 45m

$187

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 4/22

12:40 pm-2:00 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Wed 4/29

8:30 am-11:35 am

1 stop3h 05m

$197

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 5/12

3:45 pm-9:10 pm

2 stops5h 25m

Phoenix Sky Harbor Intl

Tue 5/19

2:50 pm-8:50 pm

2 stops6h 00m

$262
Quickest round-trip

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 6/8

5:15 pm-6:35 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Sun 6/14

10:55 pm-12:05 am

Nonstop1h 10m

$301

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 4/16

3:55 pm-9:15 pm

2 stops5h 20m

Phoenix Sky Harbor Intl

Sat 4/18

10:05 am-4:45 pm

1 stop6h 40m

$320

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 6/17

10:10 am-11:25 am

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sat 6/20

5:10 pm-9:55 pm

1 stop4h 45m

$329

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 4/25

10:30 am-4:10 pm

2 stops5h 40m

Phoenix Sky Harbor Intl

Mon 4/27

8:45 am-3:00 pm

2 stops6h 15m

$335

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 8/8

5:50 am-7:05 am

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sun 8/9

5:00 pm-6:15 pm

Nonstop1h 15m

$339

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 5/22

6:50 pm-10:55 pm

1 stop4h 05m

Phoenix Sky Harbor Intl

Mon 5/25

7:30 am-8:45 am

Nonstop1h 15m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 21 resultsSorted by cheapest first
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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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.

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 March 13, 2026.

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 $48). 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 March 28, 2026.

It’s optimal to fly from Ontario to Phoenix Sky Harbor Intl Airport at noon. By choosing this option you can save up to 17% 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 March 28, 2026.

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
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on PHX

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 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 March 28, 2026.
Read through reviews of airlines operating flights from Ontario to Phoenix Sky Harbor Intl Airport, such as Southwest,JetBlue, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,333 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

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
4,333 reviews
Southwest
8.0
Very good
4,333 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

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.
JetBlue
7.2
Good
2,909 reviews
Southwest
8.0
Very good
4,333 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

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
7.1
Good
11,520 reviews
Southwest
8.0
Very good
4,333 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

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
5.7
Fair
3,013 reviews
Southwest
8.0
Very good
4,333 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

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 8 daily outbound flights to Phoenix Sky Harbor Intl from 4 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 5h 55m. 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 $79, 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 $124, respectively. Frontier is 69% 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 American Airlines and Frontier, with prices starting from $58 and $69, 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 (93%), Southwest (87%), American Airlines (84%).

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

    On average you can expect to pay $820 for a flight from Ontario to Phoenix Sky Harbor Intl Airport. The cheapest flight overall is $138 while the most popular route, (Ontario - Phoenix Sky Harbor Intl) is currently priced at $141.

  • 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 $48). 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
Glendale
Paradise Valley
Casa Grande
Payson
Peoria
Camp Verde
Chandler
Globe
Surprise
Buckeye
Guadalupe

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Top 4 airlines flying from Ontario to Sky Harbor Intl

Discover the top 4 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 March 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$79Average$168FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$97Average$267FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$124Average$302FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$228Average$308FlexibilityNo cancel feeOn-time62%

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