Question 1

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

Accepted Answer

Frontier, at $99, was found to be the cheapest airline from Phoenix to Ontario.Alternate airlines to your destination round-trip include Southwest and American Airlines. Frontier is 63% 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 Phoenix to Ontario one-way?

Accepted Answer

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $58. Users have also found prices from $58 and $58 on American Airlines and Southwest, respectively.

Question 3

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

Accepted Answer

The price you pay for your flight from Phoenix to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 36 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Question 4

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

Accepted Answer

Currently, February is the cheapest month in which you can book a flight from Phoenix to Ontario (average of $218). Flying from Phoenix to Ontario in June is currently the most expensive (average of $330). 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 Phoenix to Ontario?

Accepted Answer

Travelers seeking maximum savings on their Phoenix to Ontario flight should consider departing on Tuesday at noon 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.

Question 6

Weekly flight availability from Phoenix to Ontario

Accepted Answer

The most flights from PH1 to ONT are scheduled on a Monday (8 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (1 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Question 9

What are the cheapest flights from Phoenix to Ontario?

Accepted Answer

While on average a flight from Phoenix to Ontario is generally $278, our data shows the cheapest flight currently is $58. When looking at the most popular route, (Phoenix Sky Harbor Intl - Ontario), you can expect to pay $117 for that flight.

Question 10

What are the most reliable airlines from Phoenix to Ontario?

Accepted Answer

The top 3 most reliable airlines when flying from Phoenix to Ontario are American Airlines (75%), Southwest (74%) and British Airways (73%).

Question 11

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

Accepted Answer

Southwest, American Airlines and Frontier are the most popular airlines when flying from Phoenix to Ontario.

Question 12

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

Accepted Answer

When flying from Phoenix to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 30% versus a flight in the evening.

Question 13

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

Accepted Answer

Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from Phoenix to Ontario. 4 airlines have flights to Ontario from Phoenix on a regular basis. Booking flights from Phoenix to Ontario should not be difficult; the airport handles an average of 5 inbound flights from Phoenix per day.

Question 14

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

Accepted Answer

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

Question 15

How can I find direct flights from Phoenix to Ontario?

Accepted Answer

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

Question 16

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

Accepted Answer

Yes. Cheapflights offers flight deals from Phoenix 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.

Popular in	June
Cheapest in	February
Average price	$265

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$99	Average$182	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$117	Average$266	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$134	Average$307	FlexibilityNo cancel fee	On-time71%
JetBlue	Cheapest$192	Average$452	FlexibilityNo cancel fee	On-time62%

Cheap flights from Phoenix to Ontario (ONT)

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Cheapflights Insights

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

The price you pay for your flight from Phoenix to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 36 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

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

When flying from Phoenix to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 30% versus a flight in the evening.

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

Travelers seeking maximum savings on their Phoenix to Ontario flight should consider departing on Tuesday at noon 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.

Weekly flight availability from Phoenix to Ontario

The most flights from PH1 to ONT are scheduled on a Monday (8 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (1 on average).

Reviews of airlines servicing Ontario

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

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

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

What are the most reliable airlines from Phoenix to Ontario?

What are the cheapest flights from Phoenix to Ontario?

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

How can I find direct flights from Phoenix to Ontario?

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

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

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Alternative routes for Phoenix to Ontario

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Complete your trip

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Other flights to Ontario

Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 23, 2026.

Phoenix and Ontario flights

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