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Cheap flights from Ontario to Phoenix from $63

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 1/20. 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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Find the cheapest flights from Ontario to Phoenix

Cheap round-trip flights

Southwest Logo
7:15 pm - 8:35 pmONT-PHX
1h 20mnonstop
Southwest Logo
8:35 am - 9:55 amPHX-ONT
1h 20mnonstop
$131Southwest
Find Deal
Tue, Oct 7 - Tue, Oct 14
Frontier Logo
8:59 pm - 7:32 amONT-PHX
10h 33m1 stop
Frontier Logo
4:14 pm - 11:50 pmPHX-ONT
7h 36m1 stop
$137Frontier
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Wed, Oct 1 - Wed, Oct 8
Frontier Logo
6:53 am - 3:04 pmONT-PHX
8h 11m1 stop
Frontier Logo
7:30 pm - 11:50 pmPHX-ONT
28h 20m1 stop
$139Frontier
Find Deal
Wed, Oct 8 - Wed, Oct 15
Southwest Logo
4:35 pm - 10:05 pmONT-PHX
5h 30m1 stop
Southwest Logo
11:05 am - 12:20 pmPHX-ONT
1h 15mnonstop
$141Southwest
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Tue, Oct 7 - Tue, Oct 14
Frontier Logo
6:00 am - 9:17 amONT-PHX
3h 17m1 stop
Frontier Logo
10:17 am - 12:51 pmPHX-ONT
3h 34m1 stop
$142Frontier
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Thu, Oct 30 - Mon, Nov 3
Frontier Logo
7:30 pm - 10:42 pmONT-PHX
3h 12m1 stop
Frontier Logo
7:40 am - 3:24 pmPHX-ONT
7h 44m1 stop
$143Frontier
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Sun, Sep 28 - Sun, Oct 5
Frontier Logo
4:08 pm - 11:57 pmONT-PHX
7h 49m1 stop
Frontier Logo
7:40 am - 3:24 pmPHX-ONT
7h 44m1 stop
$144Frontier
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Fri, Sep 26 - Sun, Sep 28
Frontier Logo
6:54 pm - 11:41 pmONT-PHX
4h 47m1 stop
Frontier Logo
5:45 am - 11:54 amPHX-ONT
6h 09m1 stop
$145Frontier
Find Deal
Thu, Oct 9 - Sun, Oct 12
American Airlines Logo
1:00 pm - 2:19 pmONT-PHX
1h 19mnonstop
American Airlines Logo
8:03 am - 9:19 amPHX-ONT
1h 16mnonstop
$155American Airlines
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Tue, Oct 14 - Wed, Oct 22
American Airlines Logo
7:27 pm - 8:47 pmONT-PHX
1h 20mnonstop
American Airlines Logo
8:03 am - 9:19 amPHX-ONT
1h 16mnonstop
$157American Airlines
Find Deal
Thu, Oct 9 - Thu, Oct 16

American Airlines flights from Ontario to Phoenix Sky Harbor Intl Airport

Our best American Airlines deals on Ontario to Phoenix Sky Harbor Intl Airport flight tickets
American Airlines
Oct 14
ONT1:00 pmOntario
1h 19m
PHX2:19 pmPhoenix Sky Harbor Intl
Oct 22
PHX8:03 amPhoenix Sky Harbor Intl
1h 16m
ONT9:19 amOntario
$155
Find similar
American Airlines
Oct 9
ONT7:27 pmOntario
1h 20m
PHX8:47 pmPhoenix Sky Harbor Intl
Oct 16
PHX8:03 amPhoenix Sky Harbor Intl
1h 16m
ONT9:19 amOntario
$157
Find similar
American Airlines
Oct 2
ONT7:16 pmOntario
1h 19m
PHX8:35 pmPhoenix Sky Harbor Intl
Oct 6
PHX7:41 amPhoenix Sky Harbor Intl
1h 15m
ONT8:56 amOntario
$158
Find similar

Frontier flights from Ontario to Phoenix Sky Harbor Intl Airport

Our best Frontier deals on Ontario to Phoenix Sky Harbor Intl Airport flight tickets
Frontier
Oct 1
ONT8:59 pmOntario
10h 33m
1 stop
PHX7:32 amPhoenix Sky Harbor Intl
Oct 8
PHX4:14 pmPhoenix Sky Harbor Intl
7h 36m
1 stop
ONT11:50 pmOntario
$137
Find similar
Frontier
Oct 8
ONT6:53 amOntario
8h 11m
1 stop
PHX3:04 pmPhoenix Sky Harbor Intl
Oct 15
PHX7:30 pmPhoenix Sky Harbor Intl
28h 20m
1 stop
ONT11:50 pmOntario
$139
Find similar
Frontier
Oct 30
ONT6:00 amOntario
3h 17m
1 stop
PHX9:17 amPhoenix Sky Harbor Intl
Nov 3
PHX10:17 amPhoenix Sky Harbor Intl
3h 34m
1 stop
ONT12:51 pmOntario
$142
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Phoenix Sky Harbor Intl Airport 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 September 11, 2025.
Use the filters below to find and compare flights from Ontario to Phoenix Sky Harbor Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 10/7

7:15 pm-8:35 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Tue 10/14

8:35 am-9:55 am

Nonstop1h 20m

$131

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 10/1

8:59 pm-7:32 am

1 stop10h 33m

Phoenix Sky Harbor Intl

Wed 10/8

4:14 pm-11:50 pm

1 stop7h 36m

$137

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 10/8

6:53 am-3:04 pm

1 stop8h 11m

Phoenix Sky Harbor Intl

Wed 10/15

7:30 pm-11:50 pm

1 stop28h 20m

$139

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 10/7

4:35 pm-10:05 pm

1 stop5h 30m

Phoenix Sky Harbor Intl

Tue 10/14

11:05 am-12:20 pm

Nonstop1h 15m

$141

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 10/30

6:00 am-9:17 am

1 stop3h 17m

Phoenix Sky Harbor Intl

Mon 11/3

10:17 am-12:51 pm

1 stop3h 34m

$142

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 9/28

7:30 pm-10:42 pm

1 stop3h 12m

Phoenix Sky Harbor Intl

Sun 10/5

7:40 am-3:24 pm

1 stop7h 44m

$143

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 9/26

4:08 pm-11:57 pm

1 stop7h 49m

Phoenix Sky Harbor Intl

Sun 9/28

7:40 am-3:24 pm

1 stop7h 44m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 10/9

6:54 pm-11:41 pm

1 stop4h 47m

Phoenix Sky Harbor Intl

Sun 10/12

5:45 am-11:54 am

1 stop6h 09m

$145

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 10/14

1:00 pm-2:19 pm

Nonstop1h 19m

Phoenix Sky Harbor Intl

Wed 10/22

8:03 am-9:19 am

Nonstop1h 16m

$155

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 10/9

7:27 pm-8:47 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Thu 10/16

8:03 am-9:19 am

Nonstop1h 16m

$157

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 Sky Harbor Intl Airport

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 Sky Harbor Intl Airport?

In general, August is the cheapest month to fly from Ontario to Phoenix Sky Harbor Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $201. If you are unable to visit Phoenix Sky Harbor Intl Airport during the month of August, then departing from Ontario during the month September is also very affordable. Most momondo users find prices during this month for around $208.

What is the cheapest day to depart on your flight to Phoenix Sky Harbor Intl Airport?

On average, the least expensive day to fly to Phoenix Sky Harbor Intl Airport from Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as $200. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $294. These prices are subject to change though, so be sure to set up a Price Alert for flights to Phoenix Sky Harbor Intl Airport.

What is the cheapest time of day to depart on your flight to Phoenix Sky Harbor Intl Airport?

At noon is the cheapest time of day to fly from Ontario to Phoenix Sky Harbor Intl Airport when you can find flight prices for as low as $167. Flying to Phoenix Sky Harbor Intl Airport at noon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $284. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ontario to Phoenix Sky Harbor Intl flight route?

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

How far in advance should I book a flight to Phoenix Sky Harbor Intl Airport?

You are more likely to see cheaper flights to Phoenix Sky Harbor Intl Airport from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Phoenix Sky Harbor Intl Airport 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 Sky Harbor Intl Airport from Ontario for as low as $164 on momondo.

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

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

Can stopping save me money on Ontario to Phoenix Sky Harbor Intl Airport flights?

You could potentially save up to 21% on your flight if you consider stops on a Ontario to Phoenix Sky Harbor Intl Airport flight.

How have Ontario to Phoenix Sky Harbor Intl Airport flight prices changed over time?

As of September 2025, prices for Ontario to Phoenix Sky Harbor Intl Airport flights are approximately 32% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to Phoenix Sky Harbor Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Phoenix Sky Harbor Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Phoenix Sky Harbor Intl Airport (ONT to PHX) flight deals and tips

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

Best Price Found

$149

Fastest flight time

1h 10m

Direct flights

Every day
The best one-way flight to Phoenix Sky Harbor Intl Airport from Ontario in the past 72 hours is $149. The best round-trip flight deal from Ontario to Phoenix Sky Harbor Intl Airport found on momondo in the last 72 hours is $267.
The fastest flight from Ontario to Phoenix Sky Harbor Intl Airport takes 1h 10m
Direct flights go from Ontario to Phoenix Sky Harbor Intl Airport every day.
Search flight deals

  • How far is Ontario to Phoenix Sky Harbor Intl by plane?

    The straight-line distance from Ontario to Phoenix Sky Harbor Intl is 327.4 mi. A reasonable flight in good conditions will take 1h 15m.

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

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

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

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

    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 Sky Harbor Intl Airport.

  • What documentation or ID do you need to fly to Phoenix Sky Harbor Intl Airport?

    The travel and health documents you'll need for your trip to Phoenix Sky Harbor Intl Airport 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 Sky Harbor Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Ontario to Phoenix Sky Harbor Intl Airport?

  • What is the most popular airline from Ontario to Phoenix Sky Harbor Intl Airport?

Best airlines flying from Ontario to Phoenix Sky Harbor Intl Airport

Compare and see reviews for airlines that fly from Ontario to Phoenix Sky Harbor Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $63Free CancellationRating
5.8
3,177 reviews
Search Frontier flights
SouthwestPriceFrom $107Free CancellationRating
8.0
4,248 reviews
Search Southwest flights
American AirlinesPriceFrom $127Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

  • Southwest Flights From Ontario to Phoenix Sky Harbor Intl Airport

    Southwest operates around 23 flights from Ontario to Phoenix Sky Harbor Intl Airport every week. The average price of these flights found in the last 72 hours has been $261, but momondo users have found Southwest deals from Ontario to Phoenix Sky Harbor Intl Airport from as low as $107 round-trip. Southwest has been scored 8.0/10 in 4,248 reviews.

  • American Airlines Flights From Ontario to Phoenix Sky Harbor Intl Airport

    American Airlines (7.2/10 from 10,000 reviews) operates around 21 flights from Ontario to Phoenix Sky Harbor Intl Airport in any given week. The average American Airlines airfare for this route is around $290, with deals from around $127 rare but found on momondo. Referenced prices are for round-trip Ontario to Phoenix Sky Harbor Intl Airport flight searches in the last 72 hours.

Traveling to a place near Phoenix?

Book flights to Phoenix if you plan to visit one of these locations
Scottsdale
Mesa
Tempe
Glendale
Chandler
Gilbert
Peoria
Surprise
Casa Grande
Buckeye
Goodyear
Apache Junction
Payson
Wickenburg
Paradise Valley
Avondale
Camp Verde
Fountain Hills
Litchfield Park
Cave Creek

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?

All flight searches from Ontario to Phoenix on momondo can be filtered to show those which offer flexible booking policies.

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

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

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

Yes momondo offers price alerts on flights to Phoenix from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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