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Cheap flights from Ontario to Phoenix 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 Ontario to Phoenix departing on 5/12. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Phoenix

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:04 pm - 11:24 pm
ONT
-
PHX
7h 20m
1 stop
Frontier Logo
6:43 pm - 11:49 pm
PHX
-
ONT
5h 06m
1 stop
$140Frontier
Thu, May 7 - Sat, May 9
Frontier Logo
6:00 am - 3:55 pm
ONT
-
PHX
9h 55m
1 stop
Frontier Logo
9:52 am - 7:32 pm
PHX
-
ONT
9h 40m
1 stop
$141Frontier
Sat, May 9 - Mon, May 11
Frontier Logo
4:04 pm - 8:47 am
ONT
-
PHX
16h 43m
1 stop
Frontier Logo
10:27 pm - 3:44 pm
PHX
-
ONT
17h 17m
1 stop
$142Frontier
Thu, May 7 - Mon, May 11
Frontier Logo
4:04 pm - 11:24 pm
ONT
-
PHX
7h 20m
1 stop
Frontier Logo
10:27 pm - 3:44 pm
PHX
-
ONT
17h 17m
1 stop
$143Frontier
Sat, May 16 - Mon, May 18
Frontier Logo
4:39 pm - 11:24 pm
ONT
-
PHX
6h 45m
1 stop
Frontier Logo
7:40 am - 3:09 pm
PHX
-
ONT
7h 29m
1 stop
$144Frontier
Tue, May 12 - Sat, May 16
Frontier Logo
8:17 pm - 8:59 pm
ONT
-
PHX
24h 42m
1 stop
Frontier Logo
12:05 pm - 7:11 pm
PHX
-
ONT
7h 06m
1 stop
$146Frontier
Fri, May 8 - Tue, May 12
Southwest Logo
6:00 pm - 7:15 pm
ONT
-
PHX
1h 15mnonstop
Southwest Logo
7:25 am - 1:45 pm
PHX
-
ONT
6h 20m
1 stop
$147Southwest
Mon, May 11 - Wed, May 20
Frontier Logo
6:00 am - 11:24 pm
ONT
-
PHX
17h 24m
2 stops
Frontier Logo
7:40 am - 3:09 pm
PHX
-
ONT
7h 29m
1 stop
$149Frontier
Tue, May 12 - Thu, May 14
Frontier Logo
4:04 pm - 8:47 am
ONT
-
PHX
16h 43m
1 stop
Frontier Logo
7:40 am - 7:32 pm
PHX
-
ONT
11h 52m
1 stop
$150Frontier
Sun, May 10 - Thu, May 14
Frontier Logo
8:44 am - 11:24 pm
ONT
-
PHX
14h 40m
1 stop
Frontier Logo
7:40 am - 3:09 pm
PHX
-
ONT
7h 29m
1 stop
$151Frontier
Fri, May 8 - Sun, May 10

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Frontier flights from Ontario to Phoenix

Our best Frontier deals on Ontario to Phoenix flight tickets
Frontier
May 7
ONT4:04 pmOntario
7h 20m
1 stop
PHX11:24 pmPhoenix Sky Harbor Intl
May 9
PHX6:43 pmPhoenix Sky Harbor Intl
5h 06m
1 stop
ONT11:49 pmOntario
$140
Frontier
May 9
ONT6:00 amOntario
9h 55m
1 stop
PHX3:55 pmPhoenix Sky Harbor Intl
May 11
PHX9:52 amPhoenix Sky Harbor Intl
9h 40m
1 stop
ONT7:32 pmOntario
$141
Frontier
May 7
ONT4:04 pmOntario
16h 43m
1 stop
PHX8:47 amPhoenix Sky Harbor Intl
May 11
PHX10:27 pmPhoenix Sky Harbor Intl
17h 17m
1 stop
ONT3:44 pmOntario
$142

American Airlines flights from Ontario to Phoenix

Our best American Airlines deals on Ontario to Phoenix flight tickets
American Airlines
May 7
ONT7:35 pmOntario
1h 24m
PHX8:59 pmPhoenix Sky Harbor Intl
May 11
PHX7:26 amPhoenix Sky Harbor Intl
1h 22m
ONT8:48 amOntario
$178
American Airlines
May 7
ONT7:35 pmOntario
1h 24m
PHX8:59 pmPhoenix Sky Harbor Intl
May 11
PHX7:26 amPhoenix Sky Harbor Intl
1h 22m
ONT8:48 amOntario
$179
American Airlines
May 21
ONT7:12 pmOntario
1h 23m
PHX8:35 pmPhoenix Sky Harbor Intl
May 27
PHX10:45 amPhoenix Sky Harbor Intl
1h 20m
ONT12:05 pmOntario
$192

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 April 17, 2026.
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

Cheapest round-trip

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 5/7

4:04 pm-11:24 pm

1 stop7h 20m

Phoenix Sky Harbor Intl

Sat 5/9

6:43 pm-11:49 pm

1 stop5h 06m

$140

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 5/9

6:00 am-3:55 pm

1 stop9h 55m

Phoenix Sky Harbor Intl

Mon 5/11

9:52 am-7:32 pm

1 stop9h 40m

$141

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 5/7

4:04 pm-8:47 am

1 stop16h 43m

Phoenix Sky Harbor Intl

Mon 5/11

10:27 pm-3:44 pm

1 stop17h 17m

$142

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 5/16

4:04 pm-11:24 pm

1 stop7h 20m

Phoenix Sky Harbor Intl

Mon 5/18

10:27 pm-3:44 pm

1 stop17h 17m

$143

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 5/12

4:39 pm-11:24 pm

1 stop6h 45m

Phoenix Sky Harbor Intl

Sat 5/16

7:40 am-3:09 pm

1 stop7h 29m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 5/8

8:17 pm-8:59 pm

1 stop24h 42m

Phoenix Sky Harbor Intl

Tue 5/12

12:05 pm-7:11 pm

1 stop7h 06m

$146
Quickest round-trip

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 5/11

6:00 pm-7:15 pm

Nonstop1h 15m

Phoenix Sky Harbor Intl

Wed 5/20

7:25 am-1:45 pm

1 stop6h 20m

$147

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 5/12

6:00 am-11:24 pm

2 stops17h 24m

Phoenix Sky Harbor Intl

Thu 5/14

7:40 am-3:09 pm

1 stop7h 29m

$149

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 5/10

4:04 pm-8:47 am

1 stop16h 43m

Phoenix Sky Harbor Intl

Thu 5/14

7:40 am-7:32 pm

1 stop11h 52m

$150

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 5/8

8:44 am-11:24 pm

1 stop14h 40m

Phoenix Sky Harbor Intl

Sun 5/10

7:40 am-3:09 pm

1 stop7h 29m

$151

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 $195.

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 $219. 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 $320.

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 $183. In the afternoon is when there is more demand to fly to Phoenix, so prices are often more expensive at around $286 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 $260 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

3 airports
The fastest flight from Ontario to Phoenix takes 1h 15m
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

Frequently asked questions about flying from Ontario to Phoenix

  • 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 15m.

  • 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 $78Free CancellationRating
5.7
2,986 reviews
Search Frontier flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,329 reviews
Search Southwest flights
American AirlinesPriceFrom $124Free CancellationRating
7.1
11,595 reviews
Search American Airlines flights
JetBluePriceFrom $228Free CancellationRating
7.2
2,939 reviews
Search JetBlue 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