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Cheap flights from Ontario to Phoenix from $55

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 11/19. 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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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
12:04 pm - 12:44 amONT-PHX
11h 40m1 stop
Frontier Logo
7:00 am - 3:06 pmPHX-ONT
9h 06m1 stop
$134Frontier
Find Deal
Thu, Dec 4 - Sun, Dec 7
Frontier Logo
6:15 am - 6:31 pmONT-PHX
11h 16m1 stop
Frontier Logo
7:43 pm - 2:04 pmPHX-ONT
19h 21m1 stop
$136Frontier
Find Deal
Tue, Dec 2 - Wed, Dec 3
Frontier Logo
3:20 pm - 12:44 amONT-PHX
8h 24m1 stop
Frontier Logo
7:00 am - 3:06 pmPHX-ONT
9h 06m1 stop
$138Frontier
Find Deal
Fri, Dec 5 - Sun, Dec 7
Frontier Logo
6:30 am - 8:19 amONT-PHX
24h 49m1 stop
Frontier Logo
10:43 pm - 9:06 pmPHX-ONT
23h 23m1 stop
$139Frontier
Find Deal
Thu, Nov 20 - Fri, Nov 21
Frontier Logo
5:18 pm - 6:31 pmONT-PHX
24h 13m1 stop
Frontier Logo
7:43 pm - 5:22 pmPHX-ONT
22h 39m1 stop
$140Frontier
Find Deal
Mon, Dec 15 - Wed, Dec 17
Frontier Logo
5:06 pm - 9:38 pmONT-PHX
3h 32m1 stop
Frontier Logo
7:00 am - 11:28 amPHX-ONT
5h 28m1 stop
$141Frontier
Find Deal
Fri, Nov 21 - Mon, Nov 24
Frontier Logo
2:05 pm - 12:40 amONT-PHX
9h 35m1 stop
Frontier Logo
7:00 am - 3:06 pmPHX-ONT
9h 06m1 stop
$142Frontier
Find Deal
Fri, Dec 12 - Sun, Dec 14
Frontier Logo
5:06 pm - 9:38 pmONT-PHX
3h 32m1 stop
Frontier Logo
10:20 am - 6:13 pmPHX-ONT
8h 53m1 stop
$144Frontier
Find Deal
Fri, Nov 21 - Sat, Nov 22
Frontier Logo
3:31 pm - 9:38 pmONT-PHX
5h 07m1 stop
Frontier Logo
7:00 am - 11:28 amPHX-ONT
5h 28m1 stop
$145Frontier
Find Deal
Thu, Nov 20 - Sun, Nov 23
Frontier Logo
12:58 am - 8:55 amONT-PHX
6h 57m1 stop
Frontier Logo
9:23 am - 2:26 pmPHX-ONT
6h 03m1 stop
$146Frontier
Find Deal
Wed, Nov 19 - Fri, Nov 21

Frontier flights from Ontario to Phoenix

Our best Frontier deals on Ontario to Phoenix flight tickets
Frontier
Dec 4
ONT12:04 pmOntario
11h 40m
1 stop
PHX12:44 amPhoenix Sky Harbor Intl
Dec 7
PHX7:00 amPhoenix Sky Harbor Intl
9h 06m
1 stop
ONT3:06 pmOntario
$134
Find similar
Frontier
Dec 2
ONT6:15 amOntario
11h 16m
1 stop
PHX6:31 pmPhoenix Sky Harbor Intl
Dec 3
PHX7:43 pmPhoenix Sky Harbor Intl
19h 21m
1 stop
ONT2:04 pmOntario
$136
Find similar
Frontier
Dec 5
ONT3:20 pmOntario
8h 24m
1 stop
PHX12:44 amPhoenix Sky Harbor Intl
Dec 7
PHX7:00 amPhoenix Sky Harbor Intl
9h 06m
1 stop
ONT3:06 pmOntario
$138
Find similar

Southwest flights from Ontario to Phoenix

Our best Southwest deals on Ontario to Phoenix flight tickets
Southwest
Nov 11
ONT6:30 pmOntario
1h 20m
PHX8:50 pmPhoenix Sky Harbor Intl
Nov 18
PHX8:45 pmPhoenix Sky Harbor Intl
1h 10m
ONT8:55 pmOntario
$394
Find similar
Southwest
Nov 11
ONT8:40 amOntario
3h 00m
1 stop
PHX12:40 pmPhoenix Sky Harbor Intl
Nov 18
PHX6:15 pmPhoenix Sky Harbor Intl
1h 15m
ONT6:30 pmOntario
$400
Find similar
Southwest
Nov 11
ONT7:55 amOntario
6h 05m
2 stops
PHX3:00 pmPhoenix Sky Harbor Intl
Nov 18
PHX12:40 pmPhoenix Sky Harbor Intl
5h 10m
2 stops
ONT4:50 pmOntario
$424
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 November 6, 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

Thu 12/4

12:04 pm-12:44 am

1 stop11h 40m

Phoenix Sky Harbor Intl

Sun 12/7

7:00 am-3:06 pm

1 stop9h 06m

$134

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 12/2

6:15 am-6:31 pm

1 stop11h 16m

Phoenix Sky Harbor Intl

Wed 12/3

7:43 pm-2:04 pm

1 stop19h 21m

$136

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 12/5

3:20 pm-12:44 am

1 stop8h 24m

Phoenix Sky Harbor Intl

Sun 12/7

7:00 am-3:06 pm

1 stop9h 06m

$138

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 11/20

6:30 am-8:19 am

1 stop24h 49m

Phoenix Sky Harbor Intl

Fri 11/21

10:43 pm-9:06 pm

1 stop23h 23m

$139

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 12/15

5:18 pm-6:31 pm

1 stop24h 13m

Phoenix Sky Harbor Intl

Wed 12/17

7:43 pm-5:22 pm

1 stop22h 39m

$140

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 11/21

5:06 pm-9:38 pm

1 stop3h 32m

Phoenix Sky Harbor Intl

Mon 11/24

7:00 am-11:28 am

1 stop5h 28m

$141

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 12/12

2:05 pm-12:40 am

1 stop9h 35m

Phoenix Sky Harbor Intl

Sun 12/14

7:00 am-3:06 pm

1 stop9h 06m

$142

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 11/21

5:06 pm-9:38 pm

1 stop3h 32m

Phoenix Sky Harbor Intl

Sat 11/22

10:20 am-6:13 pm

1 stop8h 53m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 11/20

3:31 pm-9:38 pm

1 stop5h 07m

Phoenix Sky Harbor Intl

Sun 11/23

7:00 am-11:28 am

1 stop5h 28m

$145

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 11/19

12:58 am-8:55 am

1 stop6h 57m

Phoenix Sky Harbor Intl

Fri 11/21

9:23 am-2:26 pm

1 stop6h 03m

$146

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 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 $185.

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 $199. 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 $301.

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 $180. In the morning is when there is more demand to fly to Phoenix, so prices are often more expensive at around $270 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 $251 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 $171 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 15m

Direct flights

Every day

Airports in Phoenix

1 airport
The fastest flight from Ontario to Phoenix takes 1h 15m
Direct flights go from Ontario to Phoenix every day.
There is 1 airport near Phoenix: 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 3h 32m.

  • 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 $60Free CancellationRating
5.8
3,116 reviews
Search Frontier flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,240 reviews
Search Southwest flights
American AirlinesPriceFrom $122Free CancellationRating
7.2
11,041 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