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Cheap flights from Ontario to Phoenix from $58

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 3/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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.
American Airlines Logo
7:59 pm - 9:20 pm
ONT
-
PHX
1h 21mnonstop
American Airlines Logo
5:47 pm - 7:09 pm
PHX
-
ONT
1h 22mnonstop
$144American Airlines
Mon, Mar 23 - Tue, Mar 24
Frontier Logo
9:40 pm - 11:54 am
ONT
-
PHX
14h 14m
2 stops
Frontier Logo
11:33 am - 9:03 pm
PHX
-
ONT
9h 30m
1 stop
$147Frontier
Mon, Mar 9 - Wed, Mar 11
Frontier Logo
11:17 am - 6:05 pm
ONT
-
PHX
6h 48m
1 stop
Frontier Logo
6:50 am - 11:59 pm
PHX
-
ONT
17h 09m
1 stop
$149Frontier
Mon, Mar 23 - Tue, Mar 24
Southwest Logo
4:35 pm - 10:35 pm
ONT
-
PHX
6h 00m
1 stop
Southwest Logo
4:30 pm - 10:15 pm
PHX
-
ONT
5h 45m
1 stop
$150Southwest
Sat, Mar 14 - Wed, Mar 18
Frontier Logo
8:59 pm - 12:55 pm
ONT
-
PHX
15h 56m
1 stop
Frontier Logo
6:50 am - 11:55 pm
PHX
-
ONT
17h 05m
1 stop
$151Frontier
Mon, Apr 20 - Thu, Apr 23
Southwest Logo
4:35 pm - 10:35 pm
ONT
-
PHX
6h 00m
1 stop
Southwest Logo
8:45 am - 10:05 am
PHX
-
ONT
1h 20mnonstop
$153Southwest
Sat, Mar 14 - Sat, Mar 28
Southwest Logo
3:05 pm - 4:25 pm
ONT
-
PHX
1h 20mnonstop
Southwest Logo
7:40 am - 12:00 pm
PHX
-
ONT
4h 20m
1 stop
$154Southwest
Mon, Mar 23 - Wed, Mar 25
Frontier Logo
2:23 pm - 8:18 pm
ONT
-
PHX
5h 55m
1 stop
Frontier Logo
7:15 am - 4:15 pm
PHX
-
ONT
9h 00m
1 stop
$155Frontier
Tue, Mar 17 - Wed, Mar 18
Frontier Logo
10:03 pm - 10:33 am
ONT
-
PHX
12h 30m
1 stop
Frontier Logo
7:57 pm - 3:57 pm
PHX
-
ONT
44h 00m
2 stops
$157Frontier
Wed, Mar 25 - Mon, Mar 30
Frontier Logo
3:30 pm - 3:18 pm
ONT
-
PHX
23h 48m
1 stop
Frontier Logo
7:57 pm - 3:57 pm
PHX
-
ONT
44h 00m
2 stops
$158Frontier
Mon, Mar 23 - Mon, Mar 30

American Airlines flights from Ontario to Phoenix

Our best American Airlines deals on Ontario to Phoenix flight tickets
American Airlines
Mar 23
ONT7:59 pmOntario
1h 21m
PHX9:20 pmPhoenix Sky Harbor Intl
Mar 24
PHX5:47 pmPhoenix Sky Harbor Intl
1h 22m
ONT7:09 pmOntario
$144
American Airlines
Mar 25
ONT7:59 pmOntario
1h 21m
PHX9:20 pmPhoenix Sky Harbor Intl
Mar 30
PHX7:27 amPhoenix Sky Harbor Intl
1h 24m
ONT8:51 amOntario
$186

Southwest flights from Ontario to Phoenix

Our best Southwest deals on Ontario to Phoenix flight tickets
Southwest
Mar 14
ONT4:35 pmOntario
6h 00m
1 stop
PHX10:35 pmPhoenix Sky Harbor Intl
Mar 18
PHX4:30 pmPhoenix Sky Harbor Intl
5h 45m
1 stop
ONT10:15 pmOntario
$150
Southwest
Mar 14
ONT4:35 pmOntario
6h 00m
1 stop
PHX10:35 pmPhoenix Sky Harbor Intl
Mar 28
PHX8:45 amPhoenix Sky Harbor Intl
1h 20m
ONT10:05 amOntario
$153
Southwest
Mar 23
ONT3:05 pmOntario
1h 20m
PHX4:25 pmPhoenix Sky Harbor Intl
Mar 25
PHX7:40 amPhoenix Sky Harbor Intl
4h 20m
1 stop
ONT12:00 pmOntario
$154

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 February 22, 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

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 3/23

7:59 pm-9:20 pm

Nonstop1h 21m

Phoenix Sky Harbor Intl

Tue 3/24

5:47 pm-7:09 pm

Nonstop1h 22m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 3/9

9:40 pm-11:54 am

2 stops14h 14m

Phoenix Sky Harbor Intl

Wed 3/11

11:33 am-9:03 pm

1 stop9h 30m

$147

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 3/23

11:17 am-6:05 pm

1 stop6h 48m

Phoenix Sky Harbor Intl

Tue 3/24

6:50 am-11:59 pm

1 stop17h 09m

$149

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 3/14

4:35 pm-10:35 pm

1 stop6h 00m

Phoenix Sky Harbor Intl

Wed 3/18

4:30 pm-10:15 pm

1 stop5h 45m

$150

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 4/20

8:59 pm-12:55 pm

1 stop15h 56m

Phoenix Sky Harbor Intl

Thu 4/23

6:50 am-11:55 pm

1 stop17h 05m

$151

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 3/14

4:35 pm-10:35 pm

1 stop6h 00m

Phoenix Sky Harbor Intl

Sat 3/28

8:45 am-10:05 am

Nonstop1h 20m

$153

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 3/23

3:05 pm-4:25 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Wed 3/25

7:40 am-12:00 pm

1 stop4h 20m

$154

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 3/17

2:23 pm-8:18 pm

1 stop5h 55m

Phoenix Sky Harbor Intl

Wed 3/18

7:15 am-4:15 pm

1 stop9h 00m

$155

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 3/25

10:03 pm-10:33 am

1 stop12h 30m

Phoenix Sky Harbor Intl

Mon 3/30

7:57 pm-3:57 pm

2 stops44h 00m

$157

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 3/23

3:30 pm-3:18 pm

1 stop23h 48m

Phoenix Sky Harbor Intl

Mon 3/30

7:57 pm-3:57 pm

2 stops44h 00m

$158

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 $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 $206. 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 $181. In the morning is when there is more demand to fly to Phoenix, so prices are often more expensive at around $273 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 $255 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 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

  • 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
3,045 reviews
Search Frontier flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,299 reviews
Search Southwest flights
American AirlinesPriceFrom $122Free CancellationRating
7.2
11,338 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