Question 1

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

Accepted Answer

Frontier, at $59, was found to be the cheapest airline from Ontario to Phoenix.Alternate airlines to your destination round-trip include Southwest and American Airlines. Frontier is 80% cheaper than the average price of flights available within the next 90 days to this destination.

Question 2

What are the cheapest airlines to fly from Ontario to Phoenix one-way?

Accepted Answer

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $60. However, be on the lookout for offers from Southwest and American Airlines, as they are both options that can get you from Ontario to Phoenix for a low price.

Question 3

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

Accepted Answer

The best time to book flights from Ontario to Phoenix is 59 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.

Question 4

What is the cheapest month to book a flight from Ontario to Phoenix?

Accepted Answer

Currently, April is the cheapest month in which you can book a flight from Ontario to Phoenix (average of $253). Flying from Ontario to Phoenix in July is currently the most expensive (average of $446). 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.

Question 5

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

Accepted Answer

Travelers seeking maximum savings on their Ontario to Phoenix flight should consider departing on Thursday afternoons 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.

Question 6

Weekly flight availability from Ontario to Phoenix

Accepted Answer

The most flights from ONT to PH1 are scheduled on a Thursday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Question 7

E

Accepted Answer

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.

Question 8

E

Accepted Answer

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).

Question 9

What are the cheapest flights from Ontario to Phoenix?

Accepted Answer

Looking at all options, your cheapest flight can be booked for $58. While the most popular route (Ontario - Phoenix Sky Harbor Intl) can be booked for $117 on average, our data indicates $935 when flying from Ontario to Phoenix.

Question 10

What are the most reliable airlines from Ontario to Phoenix?

Accepted Answer

Before booking your flight to Phoenix from Ontario, check out the most reliable airlines to get you to your destination on time: Porter Airlines (89%), Southwest (78%), British Airways( 78%).

Question 11

What are the most popular airlines that fly from Ontario to Phoenix?

Accepted Answer

Before booking your flight from Ontario to Phoenix check out the most popular airlines for this route: American Airlines, Southwest or Frontier.

Question 12

What is the cheapest time of day to fly from ONT to PHX?

Accepted Answer

It’s optimal to fly from Ontario to Phoenix in the afternoon. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight in the evening.

Question 13

What airport do you fly from for flights from Ontario to Phoenix?

Accepted Answer

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 7 daily outbound flights to Phoenix from 4 different airlines.

Question 14

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

Accepted Answer

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

Question 15

How can I find direct flights from Ontario to Phoenix?

Accepted Answer

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

Question 16

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

Accepted Answer

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.

Most accurate provider	Expedia 1 star
Most trusted provider	Expedia 3 stars
Popular in	July
Cheapest in	April
Average price	$271

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$59	Average$169	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$117	Average$286	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$147	Average$316	FlexibilityNo cancel fee	On-time71%
JetBlue	Cheapest$228	Average$308	FlexibilityNo cancel fee	On-time62%

Cheap flights from Ontario (ONT) to Phoenix

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Best time to book a flight from Ontario to Phoenix

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Cheapflights Insights

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

The best time to book flights from Ontario to Phoenix is 59 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?

What is the cheapest time of day to fly from ONT to PHX?

It’s optimal to fly from Ontario to Phoenix in the afternoon. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight in the evening.

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

Travelers seeking maximum savings on their Ontario to Phoenix flight should consider departing on Thursday afternoons 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

The most flights from ONT to PH1 are scheduled on a Thursday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Phoenix

Read reviews from past customers who have flown Southwest,JetBlue, andAmerican Airlines from Ontario to Phoenix. 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.

Related info for your journey

What airport do you fly from for flights from Ontario to Phoenix?

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

What are the cheapest airlines to fly from Ontario to Phoenix one-way?

What are the most reliable airlines from Ontario to Phoenix?

What are the cheapest flights from Ontario to Phoenix?

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

How can I find direct flights from Ontario to Phoenix?

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

What is the cheapest month to book a flight from Ontario to Phoenix?

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Alternative routes for Ontario to Phoenix

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Complete your trip

Complete your trip to Phoenix by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Ontario to Phoenix by cabin class

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Ontario and Phoenix flights

Browse other Ontario and Phoenix flight options. Last updated on September 25, 2026.

Other flights from Ontario

Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on September 25, 2026.

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