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$46+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Jul 14 — Jul 211
Mon 7/14
Mon 7/21
1 adult, Economy
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Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Ontario are usually found in July or October, booked 70 days in advance, depart on a Saturday or Wednesday and return on a Friday

Cheap flight deals from Sky Harbor Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Sky Harbor Intl (PHX) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 9, 2025.

Round-trip from

$91
(American Airlines)

One-way from

$46
(Southwest)

Popular in

December

Cheapest in

July

Average price

$116

Good round-trip deal

$229 or less

Good one-way deal

$129 or less
From Phoenix Sky Harbor Intl to Ontario
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One-way flight from Phoenix Sky Harbor Intl to Ontario
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Highest demand for flights based on searches. 15% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Ontario.
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Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Ontario.
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Find flight deals from Sky Harbor Intl to Ontario

Cheapest flights from Sky Harbor Intl to Ontario
Explore the most affordable flight options available from Sky Harbor Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 9, 2025.

This American Airlines deal was found by Cheapflights users on 7/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1610:10 amPHX - ONT
Nonstop1h 22mAmerican Airlines
Sat 8/164:54 pmONT - PHX
Nonstop1h 29mAmerican Airlines
Deal found 7/7$91
This Southwest deal was found by Cheapflights users on 7/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:50 pmPHX - ONT
Nonstop1h 10mSouthwest
Mon 8/1112:55 pmONT - PHX
Nonstop1h 20mSouthwest
Deal found 7/7$97
This Frontier deal was found by Cheapflights users on 7/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:00 amPHX - ONT
1 stop5h 53mFrontier
Mon 8/116:00 amONT - PHX
1 stop5h 52mFrontier
Deal found 7/9$134

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 July 9, 2025.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Ontario that are best for you.

Fly from

Sky Harbor Intl

Fly to

Ontario

Route

Depart

Return

Price

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 8/16

10:10 am-11:32 am

Nonstop1h 22m

Ontario

Sat 8/16

4:54 pm-6:23 pm

Nonstop1h 29m

$91

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 8/4

6:50 pm-8:00 pm

Nonstop1h 10m

Ontario

Mon 8/11

12:55 pm-2:15 pm

Nonstop1h 20m

$97

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 8/4

6:00 am-11:53 am

1 stop5h 53m

Ontario

Mon 8/11

6:00 am-11:52 am

1 stop5h 52m

$134

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 9/4

8:00 am-9:10 am

Nonstop1h 10m

$46

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 10/6

7:41 am-8:56 am

Nonstop1h 15m

$47

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 7/14

6:00 am-11:53 am

1 stop5h 53m

$72

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 9/8

7:59 pm-10:44 am

2 stops14h 45m

$120

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

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

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

Frontier offers extra comfort seats with 32” separation for a fee, enhancing short-haul comfort.


For early morning flights, Frontier has fewer delays, ensuring timely arrivals.

Read more about Frontierby Marisa Garcia
Southwest

Southwest offers free messaging and in-flight entertainment on personal devices, ideal for short flights.


Southwest allows two free checked bags, including oversized items, enhancing travel convenience.

Read more about Southwestby Marisa Garcia
Airports
PHX

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

Read more about PHXby Brandon Schultz
ONT

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

Read more about ONTby Bill Fink
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier and Southwest

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Brandon Schultz

Brandon Schultz

Expert on PHX

Brandon Schultz

Brandon Schultz

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

Read more
Bill Fink

Bill Fink

Expert on ONT

Bill Fink

Bill Fink

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

Read more

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

Have a flexible travel schedule? Discover the best time to fly to Ontario from Sky Harbor Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Phoenix Sky Harbor Intl Airport to Ontario

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

Use this chart to determine the optimal time to book a round-trip flight from Sky Harbor Intl to Ontario. Price data was last updated on June 27, 2025.

The best time to book flights from Phoenix Sky Harbor Intl Airport to Ontario is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Ontario (average of $246). Flying from Phoenix Sky Harbor Intl Airport to Ontario in March is currently the most expensive (average of $328). 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 July 9, 2025.

When flying from Phoenix Sky Harbor Intl Airport to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 29% versus a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Sky Harbor Intl to Ontario. Price data was last updated on July 6, 2025.

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

Weekly flight availability from Phoenix Sky Harbor Intl Airport to Ontario

Explore weekly flight availability from Sky Harbor Intl to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 9, 2025.

The most flights from PHX to ONT are scheduled on a Monday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

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 July 9, 2025.
Read through reviews of airlines operating flights from Phoenix Sky Harbor Intl Airport to Ontario, such as Alaska Airlines, Southwest, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,252 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Frontier
5.9
Fair
3,271 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

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

    Currently priced at $91, American Airlines will fly you from Phoenix Sky Harbor Intl Airport to Ontario and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and Frontier - these airlines can fly you to your destination from $97 and $134, respectively. American Airlines is priced at 58% 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 $46. Users have also found prices from $47 and $72 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%), American Airlines (85%), SkyWest Airlines( 78%).

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

    On average you can expect to pay $236 for a flight from Phoenix Sky Harbor Intl Airport to Ontario. The cheapest flight overall is $99 while the most popular route, (Phoenix Sky Harbor Intl - Ontario) is currently priced at $97.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Sky Harbor Intl to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Ontario (average of $246). Flying from Phoenix Sky Harbor Intl Airport to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Sky Harbor Intl to Ontario

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Top 3 airlines flying from Sky Harbor Intl to Ontario

Discover the top 3 airlines that operate flights from Sky Harbor Intl to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$43Average$123FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$123Average$275FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$130Average$267FlexibilityNo cancel feeOn-time63%

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