HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sky Harbor Intl

$47+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Ontario to Phoenix Sky Harbor Intl are usually found in July or August, booked 75 days in advance, depart on a Friday or Wednesday and return on a Saturday

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 June 12, 2025.

Round-trip from

$175
(Frontier)

One-way from

$47
(Southwest)

Popular in

December

Cheapest in

July

Average price

$198

Good round-trip deal

$336 or less

Good one-way deal

$168 or less
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. 14% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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

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 June 12, 2025.

This Frontier deal was found by Cheapflights users on 6/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/85:15 pmONT - PHX
1 stop4h 04mFrontier
Tue 7/157:00 amPHX - ONT
1 stop9h 20mFrontier
Deal found 6/11$175
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/224:00 pmONT - PHX
2 stops6h 05mSouthwest
Mon 8/253:20 pmPHX - ONT
Nonstop1h 10mSouthwest
Deal found 6/10$176
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Fri 8/86:17 amONT - PHX
Nonstop1h 16mAmerican Airlines
Mon 8/114:39 pmPHX - ONT
Nonstop1h 13mAmerican Airlines
Deal found 6/12$178

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 June 12, 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

Tue 7/8

5:15 pm-9:19 pm

1 stop4h 04m

Phoenix Sky Harbor Intl

Tue 7/15

7:00 am-4:20 pm

1 stop9h 20m

$175

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 8/22

4:00 pm-10:05 pm

2 stops6h 05m

Phoenix Sky Harbor Intl

Mon 8/25

3:20 pm-4:30 pm

Nonstop1h 10m

$176

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 8/8

12:22 pm-1:39 pm

Nonstop1h 17m

Phoenix Sky Harbor Intl

Mon 8/11

4:39 pm-5:52 pm

Nonstop1h 13m

$178

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 8/4

12:55 pm-2:15 pm

Nonstop1h 20m

$48

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 8/12

4:54 pm-6:23 pm

Nonstop1h 29m

$49

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 8/29

5:09 pm-11:24 pm

1 stop6h 15m

$88

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 8/12

2:21 pm-11:54 pm

1 stop9h 33m

$132

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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
Airlines
Frontier

Frontier's UpFront Plus seats guarantee an empty middle seat for extra comfort.


Frontier offers no in-flight entertainment or Wi-Fi; bring your own entertainment.

Read more about Frontierby Marisa Garcia
Southwest

Southwest offers two free checked bags, including oversized items like skis or golf clubs.


Enjoy free in-flight entertainment with early-release movies and live TV on Southwest flights.

Read more about Southwestby Marisa Garcia
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
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 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 June 9, 2025.

Booking 75 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 June 12, 2025.

It’s optimal to fly from Ontario to Phoenix Sky Harbor Intl Airport in the evening. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight in the morning.

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 June 8, 2025.

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

Weekly flight availability from Ontario to Phoenix Sky Harbor Intl Airport

Explore weekly flight availability from Ontario to Sky Harbor Intl. 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 June 12, 2025.

The most flights from ONT to PHX are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Sky Harbor Intl by month

Plan your trip to Sky Harbor Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Phoenix Sky Harbor Intl Airport ranges from 0.0 - 1.1 inches per month. July is typically the wettest month, when rainfall can reach 1.1 in. June is typically the driest time to visit Phoenix Sky Harbor Intl Airport when rainfall is around 0.0 in.

Temperature in Sky Harbor Intl by month

Plan your trip to Sky Harbor Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Phoenix Sky Harbor Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 95.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 55.4 F).

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 June 12, 2025.
To help decide which airline to fly from Ontario to Phoenix, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

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

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

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

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Frontier
6.0
Okay
3,295 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

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 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 3 different airlines.

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

    Currently priced at $175, 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 $176 and $178, respectively. Frontier is 23% 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?

    $47 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 $49 and $88, 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: American Airlines (85%), Southwest (82%), Envoy Air (79%).

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

    On average you can expect to pay $892 for a flight from Ontario to Phoenix Sky Harbor Intl Airport. The cheapest flight overall is $99 while the most popular route, (Ontario - Phoenix Sky Harbor Intl) is currently priced at $97.

  • 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 Ontario?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Sky Harbor Intl

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Sky Harbor Intl flights
San Francisco to Sky Harbor Intl flights
San Jose to Sky Harbor Intl flights
Santa Ana to Sky Harbor Intl flights
San Diego to Sky Harbor Intl flights
Burbank to Sky Harbor Intl flights
Sacramento to Sky Harbor Intl flights
Los Angeles to Phoenix-Mesa Gateway flights
Fresno to Sky Harbor Intl flights
Las Vegas to Sky Harbor Intl flights
Oakland to Sky Harbor Intl flights
Palm Springs to Sky Harbor Intl flights
Reno to Sky Harbor Intl flights
Long Beach to Sky Harbor Intl flights
Santa Rosa to Sky Harbor Intl flights
San Luis Obispo to Sky Harbor Intl flights
Bakersfield to Sky Harbor Intl flights
Santa Barbara to Sky Harbor Intl flights
Oakland to Phoenix-Mesa Gateway flights
Medford to Sky Harbor Intl flights
Monterey to Sky Harbor Intl flights
Las Vegas to Phoenix-Mesa Gateway flights
Tijuana to Sky Harbor Intl flights
Yuma to Sky Harbor Intl flights
San Francisco to Phoenix-Mesa Gateway flights
Arcata to Sky Harbor Intl flights
Bullhead City to Sky Harbor Intl flights

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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$39Average$119FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$112Average$259FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$129Average$281FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.