What is the cheapest airline that flies from Phoenix to Ontario?

Southwest, Frontier, and American Airlines are the most popular carriers operating from Phoenix to Ontario

What airlines fly to Ontario?

Frontier, Southwest and American Airlines are the top three most popular airlines that fly to Ontario from Phoenix according to our data. Frontier is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 7 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

How many flights depart from Phoenix to Ontario on average per week?

As of September 2025, there are 54 flights per week flying from Phoenix to Ontario. The most common day of the week flights depart is Thu, with 20% of flights taking off on this day.

How many flights depart from Phoenix to Ontario on average per day?

7 flights are operational daily from Phoenix to Ontario as of September 2025. The most popular departure time for this route is 4:00PM, with 42% of flights per day taking off in the afternoon.

When did momondo last update prices for flights from Phoenix to Ontario Airport?

Prices for flights from Phoenix to Ontario Airport are updated daily.

How many operators does momondo search for flights from Phoenix to Ontario Airport?

As of September 2025, there are 3 operators available to choose from for flights from Phoenix to Ontario Airport.

How old do you have to be to fly from Phoenix to Ontario Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Phoenix to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$49 Cheap Flights from Phoenix to Ontario in 2025

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7:40 pm - 8:50 pmPHX-ONT

1h 10mnonstop

2:20 pm - 3:40 pmONT-PHX

1h 20mnonstop

$97Southwest

Find Deal

Sat, Oct 11 - Wed, Oct 15

7:41 am - 8:56 amPHX-ONT

1h 15mnonstop

6:15 am - 7:33 amONT-PHX

1h 18mnonstop

$98American Airlines

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Thu, Oct 9 - Mon, Oct 13

7:40 pm - 8:50 pmPHX-ONT

1h 10mnonstop

5:45 pm - 9:15 pmONT-PHX

3h 30m1 stop

$107Southwest

Find Deal

Sat, Oct 11 - Wed, Oct 15

7:40 pm - 8:50 pmPHX-ONT

1h 10mnonstop

12:55 pm - 7:15 pmONT-PHX

6h 20m2 stops

$112Southwest

Find Deal

Sat, Oct 11 - Wed, Oct 15

6:00 am - 11:38 amPHX-ONT

5h 38m1 stop

5:15 pm - 11:41 pmONT-PHX

6h 26m1 stop

$119Frontier

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Thu, Sep 25 - Mon, Oct 27

5:50 am - 12:45 pmPHX-ONT

6h 55m2 stops

5:10 pm - 9:50 pmONT-PHX

4h 40m1 stop

$122Southwest

Find Deal

Sat, Oct 18 - Mon, Oct 20

2:10 pm - 3:24 pmPHX-ONT

1h 14mnonstop

7:27 pm - 8:47 pmONT-PHX

1h 20mnonstop

$127American Airlines

Find Deal

Tue, Oct 14 - Fri, Oct 17

8:03 am - 9:19 amPHX-ONT

1h 16mnonstop

1:00 pm - 2:19 pmONT-PHX

1h 19mnonstop

$134American Airlines

Find Deal

Fri, Oct 10 - Sat, Oct 11

9:58 pm - 12:37 pmPHX-ONT

14h 39m1 stop

10:47 pm - 12:06 pmONT-PHX

13h 19m1 stop

$135Frontier

Find Deal

Fri, Oct 10 - Mon, Oct 13

8:00 am - 12:43 pmPHX-ONT

4h 43m1 stop

10:28 pm - 7:34 pmONT-PHX

21h 06m1 stop

$138Frontier

Find Deal

Sat, Sep 27 - Sun, Oct 5

Southwest flights from Phoenix to Ontario

Our best Southwest deals on Phoenix to Ontario flight tickets

Southwest

Oct 11

PHX7:40 pmPhoenix Sky Harbor Intl

1h 10m

ONT8:50 pmOntario

Oct 15

ONT2:20 pmOntario

1h 20m

PHX3:40 pmPhoenix Sky Harbor Intl

$97

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Southwest

Oct 11

PHX7:40 pmPhoenix Sky Harbor Intl

1h 10m

ONT8:50 pmOntario

Oct 15

ONT5:45 pmOntario

3h 30m

1 stop

PHX9:15 pmPhoenix Sky Harbor Intl

$107

Find similar

Southwest

Oct 11

PHX7:40 pmPhoenix Sky Harbor Intl

1h 10m

ONT8:50 pmOntario

Oct 15

ONT12:55 pmOntario

6h 20m

2 stops

PHX7:15 pmPhoenix Sky Harbor Intl

$112

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Frontier flights from Phoenix to Ontario

Our best Frontier deals on Phoenix to Ontario flight tickets

Frontier

Sep 25

PHX6:00 amPhoenix Sky Harbor Intl

5h 38m

1 stop

ONT11:38 amOntario

Oct 27

ONT5:15 pmOntario

6h 26m

1 stop

PHX11:41 pmPhoenix Sky Harbor Intl

$119

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Frontier

Oct 10

PHX9:58 pmPhoenix Sky Harbor Intl

14h 39m

1 stop

ONT12:37 pmOntario

Oct 13

ONT10:47 pmOntario

13h 19m

1 stop

PHX12:06 pmPhoenix Sky Harbor Intl

$135

Find similar

Frontier

Sep 27

PHX8:00 amPhoenix Sky Harbor Intl

4h 43m

1 stop

ONT12:43 pmOntario

Oct 5

ONT10:28 pmOntario

21h 06m

1 stop

PHX7:34 pmPhoenix Sky Harbor Intl

$138

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 10/11

7:40 pm-8:50 pm

Nonstop1h 10m

Ontario

Wed 10/15

2:20 pm-3:40 pm

Nonstop1h 20m

$97

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 10/9

7:41 am-8:56 am

Nonstop1h 15m

Ontario

Mon 10/13

6:15 am-7:33 am

Nonstop1h 18m

$98

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 10/11

7:40 pm-8:50 pm

Nonstop1h 10m

Ontario

Wed 10/15

5:45 pm-9:15 pm

1 stop3h 30m

$107

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 10/11

7:40 pm-8:50 pm

Nonstop1h 10m

Ontario

Wed 10/15

12:55 pm-7:15 pm

2 stops6h 20m

$112

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 9/25

6:00 am-11:38 am

1 stop5h 38m

Ontario

Mon 10/27

5:15 pm-11:41 pm

1 stop6h 26m

$119

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 10/18

5:50 am-12:45 pm

2 stops6h 55m

Ontario

Mon 10/20

5:10 pm-9:50 pm

1 stop4h 40m

$122

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 10/14

2:10 pm-3:24 pm

Nonstop1h 14m

Ontario

Fri 10/17

7:27 pm-8:47 pm

Nonstop1h 20m

$127

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 10/10

8:03 am-9:19 am

Nonstop1h 16m

Ontario

Sat 10/11

1:00 pm-2:19 pm

Nonstop1h 19m

$134

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 10/10

9:58 pm-12:37 pm

1 stop14h 39m

Ontario

Mon 10/13

10:47 pm-12:06 pm

1 stop13h 19m

$135

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 9/27

8:00 am-12:43 pm

1 stop4h 43m

Ontario

Sun 10/5

10:28 pm-7:34 pm

1 stop21h 06m

$138

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How to get the cheapest flight ticket from Phoenix to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Ontario?

In general, August is the cheapest month to fly from Phoenix to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $175. If you aren’t able to travel during the month of August, then book flights to Ontario from Phoenix during October instead. Flights to Ontario in October, while not as cheap as those in August, still average around $182.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $244. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Phoenix to Ontario for around $284.

What is the cheapest time of day to depart on your flight to Ontario?

At noon is the cheapest time of day to fly from Phoenix to Ontario when you can find flight prices for as low as $249. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $266 on average. Flights to Ontario from Phoenix in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Phoenix to Ontario flight route?

Fly from Phoenix Sky Harbor Intl to Ontario for the best Phoenix - Ontario flight prices

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from Phoenix when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $236 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Phoenix for as low as $97 on momondo.

What cabin class options are available on Phoenix to Ontario flights?

There are 3 cabin classes available to choose from on Phoenix to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Phoenix to Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Phoenix to Ontario

Fastest flight time	1h 10m
Direct flights	Every day
Airports in Ontario	1 airport

The fastest flight from Phoenix to Ontario takes 1h 10m

Direct flights go from Phoenix to Ontario every day.

There is 1 airport near Ontario: Ontario (ONT)

Search flight deals

How far is Phoenix to Ontario by plane?
The distance between Phoenix and Ontario is about 322.9 mi. 1h 10m is a normal flight duration for this route.
When did momondo last update prices for flights from Phoenix to Ontario Airport?
Prices for flights from Phoenix to Ontario Airport are updated daily.
How many operators does momondo search for flights from Phoenix to Ontario Airport?
As of September 2025, there are 3 operators available to choose from for flights from Phoenix to Ontario Airport.
How old do you have to be to fly from Phoenix to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Phoenix to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Phoenix to Ontario

Compare and see reviews for airlines that fly from Phoenix to Ontario with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $56	Free Cancellation	Rating 5.8 3,173 reviews	Search Frontier flights
American Airlines	PriceFrom $97	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $105	Free Cancellation	Rating 8.0 4,245 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Phoenix to Ontario?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Phoenix to Ontario. momondo saves you time and could save you money on your trip.

Can I find flights from Phoenix to Ontario with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ontario from Phoenix with this policy.

How can momondo help me find flights from Phoenix to Ontario?

momondo provides multiple filters to help you find the best flight to Ontario from Phoenix. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Phoenix to Ontario right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from Phoenix and alert you when they change.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from Phoenix to Los Angeles from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Phoenix to Los Angeles departing on 11/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Phoenix to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Ontario?

What is the cheapest day to depart on your flight to Ontario?

What is the cheapest time of day to depart on your flight to Ontario?

What is the cheapest Phoenix to Ontario flight route?

Fly from Phoenix Sky Harbor Intl to Ontario for the best Phoenix - Ontario flight prices

How far in advance should I book a flight to Ontario?

What cabin class options are available on Phoenix to Ontario flights?

There are 3 cabin classes available to choose from on Phoenix to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

What is the cheapest airline that flies from Phoenix to Ontario?

Southwest, Frontier, and American Airlines are the most popular carriers operating from Phoenix to Ontario

What airlines fly to Ontario?

How many flights depart from Phoenix to Ontario on average per day?

7 flights are operational daily from Phoenix to Ontario as of September 2025. The most popular departure time for this route is 4:00PM, with 42% of flights per day taking off in the afternoon.

How many flights depart from Phoenix to Ontario on average per week?

As of September 2025, there are 54 flights per week flying from Phoenix to Ontario. The most common day of the week flights depart is Thu, with 20% of flights taking off on this day.

Cheap Phoenix to Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Phoenix to Ontario

Fastest flight time

Direct flights

Airports in Ontario

How far is Phoenix to Ontario by plane?

When did momondo last update prices for flights from Phoenix to Ontario Airport?

How many operators does momondo search for flights from Phoenix to Ontario Airport?

How old do you have to be to fly from Phoenix to Ontario Airport?

What documentation or ID do you need to fly to Ontario Airport?

Best airlines flying from Phoenix to Ontario

Compare and see reviews for airlines that fly from Phoenix to Ontario with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Phoenix to Ontario?

Can I find flights from Phoenix to Ontario with flexible booking policies on momondo?

How can momondo help me find flights from Phoenix to Ontario?

I’m not ready to book a flight from Phoenix to Ontario right now. Can momondo alert me if prices change?

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California