$127+ Cheap flights from Philadelphia to Ontario (PHL - ONT)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
Aug 28 — Sep 41
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Philadelphia to OntarioExplore the most affordable flight options available from Philadelphia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.
Explore the most affordable flight options available from Philadelphia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:00 am
PHL
- ONT
1 stop10h 54m
Frontier
Sat 9/53:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$246
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:00 am
PHL
- ONT
1 stop12h 22m
Frontier
Tue 9/83:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$248
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 am
PHL
- ONT
1 stop12h 22m
Frontier
Tue 8/253:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$250
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 am
PHL
- ONT
1 stop12h 22m
Frontier
Mon 8/243:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/25![Frontier logo]()
$252
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:06 am
PHL
- ONT
1 stop7h 48m
Frontier
Thu 8/203:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$254
This CheapOair deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:44 pm
PHL
- ONT
1 stop16h 59m
Frontier
Wed 9/162:55 pm
ONT
- PHL
1 stop11h 41m
Frontier
Deal found 7/24![Frontier logo]()
$257
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:44 pm
PHL
- ONT
1 stop14h 06m
Frontier
Sat 8/293:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:44 pm
PHL
- ONT
1 stop30h 11m
Frontier
Tue 10/2011:38 am
ONT
- PHL
1 stop14h 58m
Frontier
Deal found 7/27![Frontier logo]()
$260
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:44 pm
PHL
- ONT
1 stop14h 06m
Frontier
Fri 8/283:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$261
This CheapOair deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:00 am
PHL
- ONT
1 stop16h 27m
Frontier
Mon 8/316:00 am
ONT
- PHL
1 stop20h 39m
Frontier
Deal found 7/28![Frontier logo]()
$262
Best flights from Philadelphia to OntarioDiscover carefully curated flight deals from Philadelphia to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2026.
Discover carefully curated flight deals from Philadelphia to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2026.
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:55 am
PHL
- ONT
1 stop8h 35m
Southwest
Sun 9/612:05 pm
ONT
- PHL
2 stops9h 00m
Southwest
Deal found 7/24![Southwest logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:00 am
PHL
- ONT
1 stop10h 16m
Alaska Airlines
Wed 9/163:14 pm
ONT
- PHL
1 stop11h 26m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$388
This Delta deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/176:48 pm
PHL
- ONT
1 stop8h 10m
Delta
Tue 12/2910:59 pm
ONT
- PHL
1 stop7h 28m
Delta
Deal found 7/27![Delta logo]()
$390
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:10 am
PHL
- ONT
1 stop9h 10m
United Airlines
Sat 12/126:53 pm
ONT
- PHL
1 stop9h 52m
United Airlines
Deal found 7/26![United Airlines logo]()
$416
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:25 am
PHL
- ONT
1 stop7h 55m
Southwest
Thu 9/242:00 pm
ONT
- PHL
1 stop6h 50m
Southwest
Deal found 7/26![Southwest logo]()
$329
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:00 am
PHL
- ONT
2 stops9h 00m
Southwest
Wed 8/199:40 am
ONT
- PHL
2 stops9h 10m
Southwest
Deal found 7/27![Southwest logo]()
$380
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Mon 9/219:01 am
ONT
- PHL
1 stop8h 54m
United Airlines
Deal found 7/28![United Airlines logo]()
$421
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:01 pm
PHL
- ONT
1 stop8h 58m
United Airlines
Sat 9/198:00 am
ONT
- PHL
1 stop8h 15m
United Airlines
Deal found 7/25![United Airlines logo]()
$421
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:50 pm
PHL
- ONT
2 stops10h 05m
Southwest
Mon 11/236:30 am
ONT
- PHL
2 stops8h 25m
Southwest
Deal found 7/28![Southwest logo]()
$394
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/246:10 am
PHL
- ONT
1 stop9h 10m
United Airlines
Thu 1/286:00 am
ONT
- PHL
1 stop7h 58m
United Airlines
Deal found 7/24![United Airlines logo]()
$445
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/229:10 am
PHL
- ONT
1 stop11h 46m
United Airlines
Thu 11/265:00 am
ONT
- PHL
1 stop7h 46m
United Airlines
Deal found 7/26![United Airlines logo]()
$450
Last-minute flights from Philadelphia to OntarioDiscover last-minute flight deals from Philadelphia to Ontario. Data last updated July 29, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Ontario. Data last updated July 29, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:44 pm
PHL
- ONT
1 stop14h 06m
Frontier
Sat 8/293:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$259
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:44 pm
PHL
- ONT
1 stop14h 06m
Frontier
Fri 8/283:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$261
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:44 pm
PHL
- ONT
1 stop14h 06m
Frontier
Mon 8/243:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$263
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:06 am
PHL
- ONT
1 stop7h 48m
Frontier
Thu 8/203:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$254
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 am
PHL
- ONT
1 stop12h 22m
Frontier
Mon 8/243:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/25![Frontier logo]()
$252
This CheapOair deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:00 am
PHL
- ONT
1 stop16h 27m
Frontier
Mon 8/316:00 am
ONT
- PHL
1 stop20h 39m
Frontier
Deal found 7/28![Frontier logo]()
$262
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/288:00 am
PHL
- ONT
1 stop11h 22m
Frontier
Sat 8/293:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$248
This Frontier deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/288:00 am
PHL
- ONT
1 stop11h 22m
Frontier
Sun 8/303:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/27![Frontier logo]()
$250
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:00 am
PHL
- ONT
1 stop10h 54m
Frontier
Sat 9/53:40 pm
ONT
- PHL
1 stop11h 50m
Frontier
Deal found 7/26![Frontier logo]()
$246
One-way flights from Philadelphia to OntarioSearch for one-way flight options from Philadelphia to Ontario. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
Search for one-way flight options from Philadelphia to Ontario. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
This Super.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:06 am
PHL
- ONT
1 stop7h 48m
Frontier
Deal found 7/27![Frontier logo]()
$127
This Super.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:00 am
PHL
- ONT
1 stop10h 54m
Frontier
Deal found 7/24![Frontier logo]()
$128
This CheapOair deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 am
PHL
- ONT
1 stop13h 46m
Frontier
Deal found 7/25![Frontier logo]()
$129
This Super.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/288:00 am
PHL
- ONT
1 stop11h 22m
Frontier
Deal found 7/24![Frontier logo]()
$130
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:00 am
PHL
- ONT
1 stop11h 22m
Frontier
Deal found 7/25![Frontier logo]()
$131
This Super.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:37 pm
PHL
- ONT
1 stop30h 13m
Frontier
Deal found 7/27![Frontier logo]()
$132
This Frontier deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:00 am
PHL
- ONT
1 stop10h 54m
Frontier
Deal found 7/28![Frontier logo]()
$134
This Trip.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:44 pm
PHL
- ONT
1 stop30h 11m
Frontier
Deal found 7/27![Frontier logo]()
$135
This Super.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1411:06 am
PHL
- ONT
1 stop7h 48m
Frontier
Deal found 7/24![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:32 pm
PHL
- ONT
2 stops33h 15m
Frontier
Deal found 7/26![Frontier logo]()
$140
Find flight deals from Philadelphia to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $246 (Frontier) |
One-way from | $127 (Super.com) |
Popular in | March |
Cheapest in | September |
Average price | $386 |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to Ontario 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, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2026.
Use the filters below to find and compare flights from Philadelphia to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sat 9/5
8:55 am-2:30 pm
1 stop8h 35m
Ontario
Sun 9/6
12:05 pm-12:05 am
2 stops9h 00m
$321
Quickest round-trip
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Thu 9/24
5:25 am-10:20 am
1 stop7h 55m
Ontario
Thu 9/24
2:00 pm-11:50 pm
1 stop6h 50m
$329
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Mon 8/17
8:00 am-2:00 pm
2 stops9h 00m
Ontario
Wed 8/19
9:40 am-9:50 pm
2 stops9h 10m
$380
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Wed 9/9
7:00 am-2:16 pm
1 stop10h 16m
Ontario
Wed 9/16
3:14 pm-5:40 am
1 stop11h 26m
$388
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Thu 12/17
6:48 pm-11:58 pm
1 stop8h 10m
Ontario
Tue 12/29
10:59 pm-9:27 am
1 stop7h 28m
$390
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Wed 11/11
2:50 pm-9:55 pm
2 stops10h 05m
Ontario
Mon 11/23
6:30 am-5:55 pm
2 stops8h 25m
$394
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Wed 12/9
6:10 am-12:20 pm
1 stop9h 10m
Ontario
Sat 12/12
6:53 pm-7:45 am
1 stop9h 52m
$416
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Fri 9/11
6:00 am-12:12 pm
1 stop9h 12m
Ontario
Mon 9/21
9:01 am-8:55 pm
1 stop8h 54m
$421
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Tue 9/15
5:01 pm-10:59 pm
1 stop8h 58m
Ontario
Sat 9/19
8:00 am-7:15 pm
1 stop8h 15m
$421
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sun 1/24
6:10 am-12:20 pm
1 stop9h 10m
Ontario
Thu 1/28
6:00 am-4:58 pm
1 stop7h 58m
$445
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Philadelphia to Ontario
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Ontario in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Philadelphia-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Philadelphia-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Philadelphia to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Philadelphia with our price prediction graph.
PHL-ONT
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Philadelphia to Ontario
Prices
Airlines
How far ahead should I book a flight from Philadelphia to Ontario?
The best time to book flights from Philadelphia to Ontario is 59 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Philadelphia to Ontario?
Currently, September is the cheapest month in which you can book a flight from Philadelphia to Ontario (average of $358). Flying from Philadelphia to Ontario in March is currently the most expensive (average of $492). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Philadelphia to Ontario?
Airfare is below average for this route at the moment.
Philadelphia to Ontario flights typically cost between $298 and $416 in August.The cheapest round-trip price found within the last 5 days was $246 on Frontier (Aug 29-Sep 5).
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated July 29, 2026.
Read through reviews of airlines operating flights from Philadelphia to Ontario, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Philadelphia to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Philadelphia to Ontario by cabin class
Find flights from Philadelphia to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 29, 2026.
Philadelphia and Ontario flights
Browse other Philadelphia and Ontario flight options. Last updated on July 29, 2026.
Other flights from Philadelphia
Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on July 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from Philadelphia to Ontario
Discover the top 5 airlines that operate flights from Philadelphia to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$215 | Average$373 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$256 | Average$358 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$290 | Average$486 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$305 | Average$456 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$323 | Average$495 | FlexibilityNo cancel fee | On-time63% |