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$55+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Jun 11 — Jun 181
Thu 6/11
Thu 6/18
1 adult, Economy
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Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Ontario are usually found in September or August, booked 85 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

Cheap 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 May 12, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Wed 6/102:03 pm
PHX
-
ONT
1 stop5h 48m
Frontier
Wed 6/243:34 pm
ONT
-
PHX
1 stop7h 26m
Frontier
Deal found 5/11$113
This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Wed 7/82:00 pm
PHX
-
ONT
1 stop5h 53m
Frontier
Tue 7/211:28 pm
ONT
-
PHX
1 stop9h 29m
Frontier
Deal found 5/11$115
This Southwest deal was found by Cheapflights users on 5/11. 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.
Tue 6/98:00 am
PHX
-
ONT
Nonstop1h 15m
Southwest
Tue 6/167:20 pm
ONT
-
PHX
Nonstop1h 15m
Southwest
Deal found 5/11$117
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Tue 6/27:40 am
PHX
-
ONT
1 stop8h 04m
Frontier
Thu 6/43:30 pm
ONT
-
PHX
1 stop7h 54m
Frontier
Deal found 5/9$118
This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Mon 6/17:40 am
PHX
-
ONT
1 stop7h 29m
Frontier
Wed 6/173:34 pm
ONT
-
PHX
1 stop7h 26m
Frontier
Deal found 5/11$121
This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Mon 6/17:40 am
PHX
-
ONT
1 stop7h 29m
Frontier
Wed 6/103:34 pm
ONT
-
PHX
1 stop7h 26m
Frontier
Deal found 5/11$123
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/292:14 pm
PHX
-
ONT
1 stop20h 52m
Frontier
Wed 6/34:39 pm
ONT
-
PHX
1 stop6h 45m
Frontier
Deal found 5/7$126
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:40 am
PHX
-
ONT
1 stop7h 29m
Frontier
Sat 6/63:30 pm
ONT
-
PHX
1 stop7h 54m
Frontier
Deal found 5/10$128
This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Tue 6/92:20 pm
PHX
-
ONT
2 stops22h 28m
Frontier
Tue 6/163:34 pm
ONT
-
PHX
1 stop7h 26m
Frontier
Deal found 5/11$142
This Southwest deal was found by Cheapflights users on 5/11. 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 6/18:05 pm
PHX
-
ONT
Nonstop1h 10m
Southwest
Wed 6/107:20 pm
ONT
-
PHX
Nonstop1h 15m
Southwest
Deal found 5/11$147

Find 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 May 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$113
(Kiwi.com)

One-way from

$55
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$258

Good round-trip deal

$226 or less

Good one-way deal

$120 or less
Provider with most accurate pricing for Phoenix Sky Harbor Intl-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Phoenix Sky Harbor Intl-Ontario flights.
Search Deals
From Phoenix Sky Harbor Intl to Ontario
Search Deals
One-way flight from Phoenix Sky Harbor Intl to Ontario
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($8 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 May 2026
Search Deals
Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Ontario.
Search Deals
Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Ontario.
Search Deals

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 May 12, 2026.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 7/11

7:55 am-12:45 pm

1 stop4h 50m

Ontario

Tue 7/21

8:30 am-12:40 pm

1 stop4h 10m

$177

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 5/30

2:25 pm-3:35 pm

Nonstop1h 10m

Ontario

Mon 6/1

5:05 pm-10:10 pm

1 stop5h 05m

$187

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 6/22

9:00 pm-10:10 pm

Nonstop1h 10m

Ontario

Wed 6/24

6:35 pm-9:40 pm

1 stop3h 05m

$207

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 6/25

9:00 pm-10:10 pm

Nonstop1h 10m

Ontario

Mon 6/29

4:00 pm-9:15 pm

2 stops5h 15m

$212

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 7/11

7:55 am-12:45 pm

1 stop4h 50m

Ontario

Thu 7/16

4:40 pm-8:50 pm

1 stop4h 10m

$217

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 6/26

6:40 pm-11:30 pm

1 stop4h 50m

Ontario

Mon 6/29

12:40 pm-6:10 pm

1 stop5h 30m

$217

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 6/10

5:50 am-9:05 am

1 stop3h 15m

Ontario

Thu 6/11

6:00 am-12:25 pm

2 stops6h 25m

$253

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 7/16

7:50 am-9:05 am

Nonstop1h 15m

Ontario

Sun 7/19

8:40 pm-9:55 pm

Nonstop1h 15m

$268
Quickest round-trip

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sun 5/31

7:00 pm-8:10 pm

Nonstop1h 10m

Ontario

Mon 6/1

6:00 pm-7:15 pm

Nonstop1h 15m

$274

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 7/2

7:45 am-12:10 pm

1 stop4h 25m

Ontario

Sun 7/5

5:30 am-9:00 am

1 stop3h 30m

$288

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/10

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Sky Harbor Intl to Ontario

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 Sky Harbor Intl to Ontario in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy2 starsTrust Score*3 stars
Super.comPrice Accuracy-Trust Score*3 stars
CheapTicketsDealPrice Accuracy1 starTrust 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 Phoenix Sky Harbor Intl Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Phoenix Sky Harbor Intl Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Phoenix Sky Harbor Intl Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Phoenix Sky Harbor Intl Airport-Ontario 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 Phoenix Sky Harbor Intl Airport-Ontario 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 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?

The best time to book flights from Phoenix Sky Harbor Intl Airport to Ontario is 84 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, September is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Ontario (average of $158). Flying from Phoenix Sky Harbor Intl Airport to Ontario in July is currently the most expensive (average of $299). 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 May 12, 2026.

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 17% versus a flight in the evening.

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 May 9, 2026.

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. Saturday evenings 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 Phoenix Sky Harbor Intl Airport to Ontario?

The best insider tips for Phoenix Sky Harbor Intl Airport to Ontario 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 Phoenix Sky Harbor Intl Airport to Ontario 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 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 May 12, 2026.
Read through reviews of airlines operating flights from Phoenix Sky Harbor Intl Airport to Ontario, such as Southwest,American Airlines, andFrontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,295 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,295 reviews
Southwest
8.0
Very good
4,295 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,661 reviews
Southwest
8.0
Very good
4,295 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.6
Fair
2,952 reviews
Southwest
8.0
Very good
4,295 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 9 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 $177, Southwest can have you in Ontario from Phoenix Sky Harbor Intl Airport in 4h 50m. Phoenix Sky Harbor Intl Airport and Ontario are separated by a distance of 324 mi.

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

    Currently priced at $84, 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 $97, respectively. Frontier is priced at 65% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Phoenix Sky Harbor Intl Airport to Ontario one-way?

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $48. Users have also found prices from $48 and $67 on American Airlines and Frontier, respectively.

  • 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: Envoy Air (100%), British Airways (89%), American Airlines( 80%).

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

    On average you can expect to pay $284 for a flight from Phoenix Sky Harbor Intl Airport to Ontario. The cheapest flight overall is $24 while the most popular route, (Phoenix Sky Harbor Intl - Ontario) is currently priced at $117.

  • 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, September is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Ontario (average of $158). Flying from Phoenix Sky Harbor Intl Airport to Ontario in July is currently the most expensive (average of $299). 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 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 May 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$84Average$175FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$97Average$280FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$268FlexibilityNo cancel feeOn-time63%

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