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Cheap flights from Ontario to Phoenix from $64

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Phoenix departing on 2/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Phoenix

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:15 am - 7:19 pm
ONT
-
PHX
11h 04m1 stop
Frontier Logo
1:00 pm - 11:24 pm
PHX
-
ONT
11h 24m1 stop
$128Frontier
Sat, Jan 31 - Sat, Feb 7
Frontier Logo
7:15 am - 1:40 pm
ONT
-
PHX
5h 25m1 stop
Frontier Logo
3:55 pm - 11:24 pm
PHX
-
ONT
8h 29m1 stop
$129Frontier
Wed, Jan 21 - Sat, Jan 24
Frontier Logo
2:34 pm - 9:30 pm
ONT
-
PHX
5h 56m1 stop
Frontier Logo
2:34 pm - 5:54 pm
PHX
-
ONT
4h 20m1 stop
$130Frontier
Mon, Jan 12 - Tue, Jan 13
Frontier Logo
7:15 am - 3:15 pm
ONT
-
PHX
7h 00m1 stop
Frontier Logo
8:30 am - 3:07 pm
PHX
-
ONT
7h 37m1 stop
$131Frontier
Wed, Jan 14 - Tue, Jan 20
Frontier Logo
11:04 am - 7:26 pm
ONT
-
PHX
7h 22m1 stop
Frontier Logo
3:55 pm - 11:24 pm
PHX
-
ONT
8h 29m1 stop
$132Frontier
Thu, Jan 22 - Sat, Jan 24
Frontier Logo
7:15 am - 3:15 pm
ONT
-
PHX
7h 00m1 stop
Frontier Logo
8:30 am - 3:07 pm
PHX
-
ONT
7h 37m1 stop
$133Frontier
Wed, Jan 14 - Tue, Jan 20
Frontier Logo
9:10 pm - 8:20 am
ONT
-
PHX
10h 10m1 stop
Frontier Logo
10:16 pm - 1:37 pm
PHX
-
ONT
16h 21m1 stop
$134Frontier
Sat, Jan 17 - Mon, Jan 19
Frontier Logo
10:18 pm - 12:25 pm
ONT
-
PHX
13h 07m1 stop
Frontier Logo
6:42 pm - 2:12 pm
PHX
-
ONT
20h 30m1 stop
$135Frontier
Fri, Jan 16 - Tue, Jan 20
Frontier Logo
8:21 am - 4:32 pm
ONT
-
PHX
7h 11m1 stop
Frontier Logo
10:32 pm - 5:48 pm
PHX
-
ONT
20h 16m1 stop
$139Frontier
Sat, Feb 21 - Sun, Feb 22
Frontier Logo
3:04 pm - 10:30 pm
ONT
-
PHX
6h 26m1 stop
Frontier Logo
9:30 am - 12:10 pm
PHX
-
ONT
3h 40m1 stop
$145Frontier
Sat, Feb 7 - Mon, Feb 9

Frontier flights from Ontario to Phoenix

Our best Frontier deals on Ontario to Phoenix flight tickets
Frontier
Jan 31
ONT7:15 amOntario
11h 04m
1 stop
PHX7:19 pmPhoenix Sky Harbor Intl
Feb 7
PHX1:00 pmPhoenix Sky Harbor Intl
11h 24m
1 stop
ONT11:24 pmOntario
$128
Find similar
Frontier
Jan 21
ONT7:15 amOntario
5h 25m
1 stop
PHX1:40 pmPhoenix Sky Harbor Intl
Jan 24
PHX3:55 pmPhoenix Sky Harbor Intl
8h 29m
1 stop
ONT11:24 pmOntario
$129
Find similar
Frontier
Jan 12
ONT2:34 pmOntario
5h 56m
1 stop
PHX9:30 pmPhoenix Sky Harbor Intl
Jan 13
PHX2:34 pmPhoenix Sky Harbor Intl
4h 20m
1 stop
ONT5:54 pmOntario
$130
Find similar

Southwest flights from Ontario to Phoenix

Our best Southwest deals on Ontario to Phoenix flight tickets
Southwest
Jan 31
ONT5:50 amOntario
1h 15m
PHX8:05 amPhoenix Sky Harbor Intl
Jan 31
PHX11:05 amPhoenix Sky Harbor Intl
1h 20m
ONT11:25 amOntario
$191
Find similar
Southwest
Jan 10
ONT10:15 amOntario
1h 15m
PHX12:30 pmPhoenix Sky Harbor Intl
Jan 12
PHX9:00 amPhoenix Sky Harbor Intl
1h 20m
ONT9:20 amOntario
$357
Find similar
Southwest
Jan 10
ONT1:45 pmOntario
1h 15m
PHX4:00 pmPhoenix Sky Harbor Intl
Jan 12
PHX3:10 pmPhoenix Sky Harbor Intl
3h 00m
1 stop
ONT5:10 pmOntario
$362
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated December 28, 2025.
Use the filters below to find and compare flights from Ontario to Phoenix that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 1/31

7:15 am-7:19 pm

1 stop11h 04m

Phoenix Sky Harbor Intl

Sat 2/7

1:00 pm-11:24 pm

1 stop11h 24m

$128

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 1/21

7:15 am-1:40 pm

1 stop5h 25m

Phoenix Sky Harbor Intl

Sat 1/24

3:55 pm-11:24 pm

1 stop8h 29m

$129

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 1/12

2:34 pm-9:30 pm

1 stop5h 56m

Phoenix Sky Harbor Intl

Tue 1/13

2:34 pm-5:54 pm

1 stop4h 20m

$130

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 1/14

7:15 am-3:15 pm

1 stop7h 00m

Phoenix Sky Harbor Intl

Tue 1/20

8:30 am-3:07 pm

1 stop7h 37m

$131

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 1/22

11:04 am-7:26 pm

1 stop7h 22m

Phoenix Sky Harbor Intl

Sat 1/24

3:55 pm-11:24 pm

1 stop8h 29m

$132

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 1/14

7:15 am-3:15 pm

1 stop7h 00m

Phoenix Sky Harbor Intl

Tue 1/20

8:30 am-3:07 pm

1 stop7h 37m

$133

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 1/17

9:10 pm-8:20 am

1 stop10h 10m

Phoenix Sky Harbor Intl

Mon 1/19

10:16 pm-1:37 pm

1 stop16h 21m

$134

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 1/16

10:18 pm-12:25 pm

1 stop13h 07m

Phoenix Sky Harbor Intl

Tue 1/20

6:42 pm-2:12 pm

1 stop20h 30m

$135

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 2/21

8:21 am-4:32 pm

1 stop7h 11m

Phoenix Sky Harbor Intl

Sun 2/22

10:32 pm-5:48 pm

1 stop20h 16m

$139

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 2/7

3:04 pm-10:30 pm

1 stop6h 26m

Phoenix Sky Harbor Intl

Mon 2/9

9:30 am-12:10 pm

1 stop3h 40m

$145

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Phoenix from

How to get the cheapest flight ticket from Ontario to Phoenix

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 typical price of a round-trip flight between Ontario and Phoenix?

What is the cheapest month to fly to Phoenix?

If you are unable to visit Phoenix during the month of September, then departing from Ontario during the month August is also very affordable. Most momondo users find prices during this month for around $187.

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

On average, the least expensive day to fly to Phoenix from Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as $201. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $300.

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

The cheapest time of day to fly to Phoenix is at noon when flights can be purchased for as low as $179. In the morning is when there is more demand to fly to Phoenix, so prices are often more expensive at around $269 per ticket.

What is the cheapest Ontario to Phoenix flight route?

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

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

You are more likely to see cheaper flights to Phoenix from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Phoenix for around $254 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phoenix from Ontario for as low as $134 on momondo.

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

There are 4 cabin classes available to choose from on Ontario to Phoenix flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Ontario to Phoenix flight deals and tips

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

Fastest flight time

1h 10m

Direct flights

Every day

Airports in Phoenix

3 airports
The fastest flight from Ontario to Phoenix takes 1h 10m
Direct flights go from Ontario to Phoenix every day.
There are 3 airports in Phoenix. From Ontario there are direct flights to Phoenix Sky Harbor Intl (PHX).
Search flight deals

  • How far is Ontario to Phoenix by plane?

    The straight-line distance from Ontario to Phoenix is 322.9 mi. By plane, this route typically takes 1h 10m.

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Phoenix.

  • What documentation or ID do you need to fly to Phoenix?

    The travel and health documents you'll need for your trip to Phoenix may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Phoenix. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Phoenix

Compare and see reviews for airlines that fly from Ontario to Phoenix with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $67Free CancellationRating
5.8
3,070 reviews
Search Frontier flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,256 reviews
Search Southwest flights
American AirlinesPriceFrom $121Free CancellationRating
7.2
11,069 reviews
Search American Airlines flights

Why use momondo?

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

It is quick and easy to find Ontario to Phoenix flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Phoenix that suits you.

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

Flights from Ontario to Phoenix with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Ontario to Phoenix flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Ontario to Phoenix flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to the United States

Fly into one of these airports located in Phoenix

Airports listed have a maximum distance of 25.4 mi from Phoenix
Phoenix-Mesa Gateway Airport