HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Phoenix

$69+ Cheap flights from Ontario (ONT) to Phoenix

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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Phoenix 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 are usually found in June or July, booked 75 days in advance, depart on a Friday or Saturday and return on a Wednesday

Cheap flight deals from Ontario to Phoenix

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Phoenix (PH1). 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 26, 2025.

Round-trip from

$137
(Southwest)

One-way from

$69
(American Airlines)

Popular in

December

Cheapest in

June

Average price

$197
From Ontario to Phoenix
Search Deals
One-way flight from Ontario to Phoenix
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Ontario to Phoenix

Cheapest flights from Ontario to Phoenix
Explore the most affordable flight options available from Ontario to Phoenix. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 26, 2025.

This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/285:20 amONT - PHX
Nonstop1h 10mSouthwest
Mon 4/287:55 amPHX - ONT
Nonstop1h 15mSouthwest
Deal found 3/25$137
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/257:25 pmONT - PHX
Nonstop1h 15mAmerican Airlines
Tue 4/298:43 pmPHX - ONT
Nonstop1h 15mAmerican Airlines
Deal found 3/24$152
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/12:43 pmONT - PHX
1 stop6h 55mFrontier
Wed 4/25:09 pmPHX - ONT
1 stop6h 50mFrontier
Deal found 3/25$180
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.
Thu 4/1712:59 amONT - PHX
1 stop6h 25mMultiple Airlines
Tue 4/227:00 amPHX - ONT
2 stops8h 32mMultiple Airlines
Deal found 3/25$291
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/157:00 amONT - PHX
1 stop9h 37mAlaska Airlines
Tue 4/159:08 pmPHX - ONT
1 stop12h 20mAlaska Airlines
Deal found 3/24$343
This Bravofly 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1711:33 amONT - PHX
1 stop9h 27mHawaiian Airlines
Sun 4/201:22 pmPHX - ONT
1 stop10h 37mHawaiian Airlines
Deal found 3/25$510
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/226:00 amONT - PHX
1 stop12h 43mUnited Airlines
Mon 4/2812:45 amPHX - ONT
2 stops19h 57mUnited Airlines
Deal found 3/25$523

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Phoenix 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 26, 2025.
Use the filters below to find and compare flights from Ontario to Phoenix that are best for you.

Fly from

Ontario

Fly to

Phoenix

Route

Depart

Return

Price

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 4/28

5:20 am-6:30 am

Nonstop1h 10m

Phoenix Sky Harbor Intl

Mon 4/28

7:55 am-9:10 am

Nonstop1h 15m

$137

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 4/24

12:50 pm-2:08 pm

Nonstop1h 18m

Phoenix Sky Harbor Intl

Sat 4/26

8:43 pm-9:58 pm

Nonstop1h 15m

$152

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 4/8

3:17 pm-11:57 pm

1 stop8h 40m

Phoenix Sky Harbor Intl

Tue 4/15

6:00 am-2:27 pm

1 stop8h 27m

$180

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 5/4

12:59 am-8:24 am

1 stop7h 25m

Phoenix Sky Harbor Intl

Tue 5/6

9:00 am-8:29 pm

2 stops11h 29m

$281

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 4/15

7:00 am-4:37 pm

1 stop9h 37m

Phoenix Sky Harbor Intl

Tue 4/15

9:08 pm-9:28 am

1 stop12h 20m

$343

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 4/17

11:33 am-9:00 pm

1 stop9h 27m

Phoenix Sky Harbor Intl

Sun 4/20

1:22 pm-11:59 pm

1 stop10h 37m

$510

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 4/22

6:00 am-6:43 pm

1 stop12h 43m

Phoenix Sky Harbor Intl

Mon 4/28

12:45 am-8:42 pm

2 stops19h 57m

$523

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 5/29

7:25 pm-8:40 pm

Nonstop1h 15m

$69

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 5/29

5:45 am-9:15 am

1 stop3h 30m

$79

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 4/23

12:10 pm-6:40 pm

1 stop6h 30m

$90

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 14 results
1
2

Best time to book a flight from Ontario to Phoenix

Have a flexible travel schedule? Discover the best time to fly to Phoenix 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

How far ahead should I book a flight from Ontario to Phoenix?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Phoenix. Price data was last updated on March 21, 2025.

The best time to book flights from Ontario to Phoenix is 75 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 Ontario to Phoenix?

Currently, January is the cheapest month in which you can book a flight from Ontario to Phoenix (average of $258). Flying from Ontario to Phoenix 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 Phoenix. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 26, 2025.

It’s optimal to fly from Ontario to Phoenix in the evening. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Ontario to Phoenix?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Phoenix. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Phoenix 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

Explore weekly flight availability from Ontario to Phoenix. 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 March 26, 2025.

The most flights from ONT to PH1 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 (1 on average).

Rainfall in Phoenix by month

Plan your trip to Phoenix by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Phoenix 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 when rainfall is around 0.0 in.

Temperature in Phoenix by month

Plan your trip to Phoenix by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Phoenix, 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 Phoenix

Get insights into the airlines that provide service to Phoenix. 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 Phoenix. Reviews last updated March 26, 2025.
Read through reviews of airlines operating flights from Ontario to Phoenix, such as Southwest, Alaska Airlines and Hawaiian Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,789 reviews
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,330 reviews
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,608 reviews
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Phoenix. 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?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Phoenix from Ontario. Booking flights from Ontario (ONT) to Phoenix should be relatively easy as there are 6 daily outbound flights to Phoenix from 3 different airlines.

  • What are the cheapest airlines flying from Ontario to Phoenix round-trip?

    Southwest, at $137, was found to be the cheapest airline from Ontario to Phoenix.Alternate airlines to your destination round-trip include American Airlines and Frontier. Southwest is 29% 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 one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $69. However, be on the lookout for offers from Southwest and Frontier, as they are both options that can get you from Ontario to Phoenix for a low price.

  • What are the most reliable airlines from Ontario to Phoenix?

    Before booking your flight to Phoenix from Ontario, check out the most reliable airlines to get you to your destination on time: British Airways (93%), SkyWest Airlines (93%), American Airlines( 88%).

  • What are the cheapest flights from Ontario to Phoenix?

    Looking at all options, your cheapest flight can be booked for $93. While the most popular route (Ontario - Phoenix Sky Harbor Intl) can be booked for $137 on average our data indicates $1,013 when flying from Ontario to Phoenix.

  • Can I find deals for flights from Ontario to Phoenix that include hotel bookings?

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

  • How can I find direct flights from Ontario to Phoenix?

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

  • Can I find deals for business class flights from Ontario to Phoenix?

    Yes. Cheapflights offers flight deals from Ontario to Phoenix 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?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Phoenix (average of $258). Flying from Ontario to Phoenix 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

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 Phoenix

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

Top 3 airlines flying from Ontario to Phoenix

Discover the top 3 airlines that operate flights from Ontario to Phoenix. 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 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$38Average$92FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$111Average$252FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$129Average$272FlexibilityNo 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.