$115+ Cheap flights from Philadelphia to Ontario (PHL - ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
Oct 9 — Oct 161
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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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Philadelphia to Ontario
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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 September 9, 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 September 9, 2026.
This Trip.com deal was found by Cheapflights users on 9/4. 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.
Wed 10/712:40 pm -
2 stops14h 07m
Fri 10/168:35 pm -
1 stop7h 43m
Deal found 9/4![Frontier logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Sat 10/312:40 pm -
2 stops14h 07m
Sat 10/106:15 am -
1 stop16h 01m
Deal found 9/3![Frontier logo]()
$256
This Frontier deal was found by Cheapflights users on 9/3. 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.
Tue 9/296:00 am -
1 stop13h 46m
Tue 10/135:25 pm -
1 stop10h 53m
Deal found 9/3![Frontier logo]()
$258
This Trip.com deal was found by Cheapflights users on 9/8. 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.
Wed 10/712:40 pm -
2 stops14h 07m
Wed 10/1411:52 am -
1 stop8h 58m
Deal found 9/8![Frontier logo]()
$263
This Frontier deal was found by Cheapflights users on 9/4. 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 10/145:50 am -
1 stop7h 39m
Wed 10/145:25 pm -
1 stop10h 53m
Deal found 9/4![Frontier logo]()
$270
This Frontier deal was found by Cheapflights users on 9/4. 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 10/108:44 pm -
1 stop17h 32m
Sat 10/175:25 pm -
1 stop10h 53m
Deal found 9/4![Frontier logo]()
$271
This Frontier deal was found by Cheapflights users on 9/5. 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 10/36:00 am -
1 stop13h 46m
Sat 10/175:25 pm -
1 stop10h 53m
Deal found 9/5![Frontier logo]()
$272
This CheapOair deal was found by Cheapflights users on 9/3. 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 -
1 stop15h 25m
Sat 10/175:25 pm -
1 stop10h 53m
Deal found 9/3![Frontier logo]()
$274
This Booking.com deal was found by Cheapflights users on 9/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:44 pm -
1 stop16h 47m
Fri 10/168:35 pm -
1 stop7h 43m
Deal found 9/7![Frontier logo]()
$276
This Booking.com deal was found by Cheapflights users on 9/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:44 pm -
1 stop16h 47m
Mon 10/268:35 pm -
1 stop7h 43m
Deal found 9/4![Frontier logo]()
$277
This FlightHub deal was found by Cheapflights users on 9/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:44 pm -
1 stop16h 47m
Wed 10/1411:52 am -
1 stop8h 58m
Deal found 9/5![Frontier logo]()
$279
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 September 9, 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 September 9, 2026.
This Delta deal was found by Cheapflights users on 9/8. 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.
Tue 11/107:15 am -
1 stop8h 02m
Tue 11/176:00 am -
1 stop8h 38m
Deal found 9/8![Delta logo]()
$369
This Southwest deal was found by Cheapflights users on 9/8. 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.
Sun 11/155:00 am -
1 stop7h 55m
Sun 11/1511:55 pm -
1 stop8h 10m
Deal found 9/8![Southwest logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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.
Thu 10/84:17 pm -
1 stop10h 37m
Mon 10/126:02 am -
1 stop20h 39m
Deal found 9/6![Alaska Airlines logo]()
$411
This United Airlines deal was found by Cheapflights users on 9/4. 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 11/136:00 am -
1 stop9h 29m
Sun 11/159:25 am -
1 stop10h 24m
Deal found 9/4![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 9/8. 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.
Mon 11/97:15 am -
1 stop8h 02m
Sat 11/146:00 am -
1 stop8h 38m
Deal found 9/8![Delta logo]()
$369
This Southwest deal was found by Cheapflights users on 9/7. 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.
Tue 11/175:00 am -
2 stops10h 10m
Tue 11/171:55 pm -
1 stop6h 30m
Deal found 9/7![Southwest logo]()
$374
This Delta deal was found by Cheapflights users on 9/5. 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.
Wed 10/77:20 am -
1 stop8h 16m
Mon 10/1911:08 pm -
1 stop7h 21m
Deal found 9/5![Delta logo]()
$389
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Sun 11/87:02 am -
1 stop11h 11m
Wed 11/184:09 pm -
1 stop10h 23m
Deal found 9/8![Alaska Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Thu 10/299:45 am -
2 stops13h 30m
Sun 11/19:25 am -
1 stop10h 24m
Deal found 9/8![United Airlines logo]()
$494
This Southwest deal was found by Cheapflights users on 9/7. 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 9/1912:10 pm -
2 stops10h 55m
Tue 9/298:35 am -
2 stops9h 05m
Deal found 9/7![Southwest logo]()
$481
This Alaska Airlines deal was found by Cheapflights users on 9/4. 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.
Tue 11/37:02 am -
1 stop11h 11m
Tue 11/106:00 am -
1 stop31h 45m
Deal found 9/4![Alaska Airlines logo]()
$492
This Delta deal was found by Cheapflights users on 9/6. 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 10/16:52 pm -
1 stop7h 55m
Sun 10/410:00 pm -
1 stop10h 00m
Deal found 9/6![Delta logo]()
$475
Last-minute flights from Philadelphia to OntarioDiscover last-minute flight deals from Philadelphia to Ontario. Data last updated September 9, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Ontario. Data last updated September 9, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 9/5. 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 10/36:00 am -
1 stop13h 46m
Fri 10/2311:52 am -
1 stop10h 24m
Deal found 9/5![Frontier logo]()
$272
This Trip.com deal was found by Cheapflights users on 9/4. 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.
Wed 10/712:40 pm -
2 stops14h 07m
Fri 10/168:35 pm -
1 stop7h 43m
Deal found 9/4![Frontier logo]()
$248
This Trip.com deal was found by Cheapflights users on 9/8. 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.
Wed 10/712:40 pm -
2 stops14h 07m
Wed 10/1411:52 am -
1 stop8h 58m
Deal found 9/8![Frontier logo]()
$263
This Frontier deal was found by Cheapflights users on 9/4. 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 10/108:44 pm -
1 stop17h 32m
Sat 10/175:25 pm -
1 stop10h 53m
Deal found 9/4![Frontier logo]()
$271
This FlightHub deal was found by Cheapflights users on 9/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:44 pm -
1 stop16h 47m
Wed 10/1411:52 am -
1 stop8h 58m
Deal found 9/5![Frontier logo]()
$279
This Frontier deal was found by Cheapflights users on 9/4. 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 10/146:00 am -
1 stop13h 48m
Fri 10/168:35 pm -
1 stop7h 43m
Deal found 9/4![Frontier logo]()
$270
This Mytrip deal was found by Cheapflights users on 9/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:44 pm -
1 stop22h 46m
Thu 10/228:35 pm -
1 stop7h 43m
Deal found 9/8![Frontier logo]()
$276
This Booking.com deal was found by Cheapflights users on 9/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:44 pm -
1 stop16h 47m
Mon 10/268:35 pm -
1 stop7h 43m
Deal found 9/4![Frontier logo]()
$277
This Frontier deal was found by Cheapflights users on 9/8. 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.
Tue 10/2012:35 pm -
2 stops14h 15m
Tue 10/2711:52 am -
2 stops16h 29m
Deal found 9/8![Frontier logo]()
$293
This Frontier deal was found by Cheapflights users on 9/8. 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 10/2412:35 pm -
2 stops14h 15m
Wed 10/286:25 am -
2 stops13h 51m
Deal found 9/8![Frontier logo]()
$298
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 September 9, 2026.
Search for one-way flight options from Philadelphia to Ontario. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 11/312:36 pm -
2 stops24h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Wed 11/412:36 pm -
2 stops14h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 9/7. 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 10/175:50 am -
1 stop7h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Frontier logo]()
$133
This Frontier deal was found by Cheapflights users on 9/4. 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 10/235:50 am -
1 stop7h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$135
This Flightnetwork deal was found by Cheapflights users on 9/7. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:50 am -
1 stop7h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Frontier logo]()
$136
This Super.com deal was found by Cheapflights users on 9/5. 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 10/108:44 pm -
1 stop17h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$137
This Super.com deal was found by Cheapflights users on 9/4. 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 10/198:44 pm -
1 stop22h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$139
This Frontier deal was found by Cheapflights users on 9/4. 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 10/118:59 pm -
1 stop13h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$141
This Frontier deal was found by Cheapflights users on 9/6. 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.
Tue 9/296:00 am -
1 stop13h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$143
This FlightHub deal was found by Cheapflights users on 9/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/98:44 pm -
1 stop15h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$144
This CheapOair deal was found by Cheapflights users on 9/8. 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 11/209:41 pm -
1 stop18h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Sat 10/315:20 pm -
2 stops21h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$149
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 September 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $248 (Trip.com) |
One-way from | $115 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $343 |
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 7,457,451 searches. Data last updated September 9, 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 Philadelphia - ONT Ontario
PHLONT
Philadelphia
Sat 10/17
6:00 am-11:06 am
1 stop8h 06m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$185
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Thu 10/15
6:49 pm-11:55 pm
1 stop8h 06m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$185
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Mon 10/19
7:20 am-12:36 pm
1 stop8h 16m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$195
Quickest round-trip
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Sun 1/3
5:15 am-10:00 am
1 stop7h 45m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$215
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Sun 11/1
6:00 am-11:06 am
1 stop8h 06m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$225
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Mon 10/5
6:00 am-12:18 pm
1 stop9h 18m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$235
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Sun 11/15
6:00 am-12:29 pm
1 stop9h 29m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$240
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Mon 10/19
6:00 am-12:18 pm
1 stop9h 18m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$245
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Fri 11/13
6:00 am-12:29 pm
1 stop9h 29m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$250
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Thu 10/1
6:00 am-12:18 pm
1 stop9h 18m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$257
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 September.
| 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
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 $343). Flying from Philadelphia to Ontario in December is currently the most expensive (average of $486). 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 $322 and $383 in October.The cheapest round-trip price found within the last 5 days was $248 on Frontier (Oct 7-Oct 16).
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 September 9, 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.
Overall
8.0
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
8.0
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
8.0
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
8.0
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
8.0
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
8.0
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
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 September 9, 2026.
Philadelphia and Ontario flights
Browse other Philadelphia and Ontario flight options. Last updated on September 9, 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 September 9, 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 7,457,451 searches. Data last updated September 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$184 | Average$358 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$215 | Average$374 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$290 | Average$466 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$316 | Average$469 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$347 | Average$487 | FlexibilityNo cancel fee | On-time63% |