$118+ Cheap flights from Ontario to Philadelphia (ONT - PHL)
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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHL
jul. 10 — jul. 171
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Philadelphia with Cheapflights
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Cheapest flights from Ontario to PhiladelphiaExplore the most affordable flight options available from Ontario to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 10, 2026.
Explore the most affordable flight options available from Ontario to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 10, 2026.
This Delta deal was found by Cheapflights users on 6/9. 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.
sáb. 9/2611:59 am
ONT
- PHL
1 stop7h 15m
Delta
mié. 9/305:20 am
PHL
- ONT
1 stop8h 27m
Delta
Deal found 6/9![Delta logo]()
$271
This Delta deal was found by Cheapflights users on 6/9. 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.
jue. 9/2411:59 am
ONT
- PHL
1 stop7h 15m
Delta
mié. 9/306:20 am
PHL
- ONT
1 stop7h 27m
Delta
Deal found 6/9![Delta logo]()
$272
This Trip.com deal was found by Cheapflights users on 6/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/305:43 pm
ONT
- PHL
1 stop18h 24m
Frontier
sáb. 7/1111:06 am
PHL
- ONT
1 stop23h 57m
Frontier
Deal found 6/7![Frontier logo]()
$284
This United Airlines deal was found by Cheapflights users on 6/8. 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.
mar. 8/189:15 am
ONT
- PHL
1 stop10h 16m
United Airlines
mar. 8/255:01 pm
PHL
- ONT
1 stop8h 34m
United Airlines
Deal found 6/8![United Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 6/10. 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.
mié. 9/161:50 pm
ONT
- PHL
1 stop7h 00m
Southwest
vie. 9/185:25 am
PHL
- ONT
1 stop7h 55m
Southwest
Deal found 6/10![Southwest logo]()
$286
This Delta deal was found by Cheapflights users on 6/9. 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.
lun. 8/1710:00 pm
ONT
- PHL
1 stop8h 38m
Delta
jue. 8/275:16 pm
PHL
- ONT
1 stop7h 36m
Delta
Deal found 6/9![Delta logo]()
$287
This Jettzy deal was found by Cheapflights users on 6/9. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/115:08 pm
ONT
- PHL
1 stop9h 52m
Multiple Airlines
mar. 8/257:02 am
PHL
- ONT
1 stop10h 07m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$288
This Southwest deal was found by Cheapflights users on 6/8. 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.
lun. 8/1710:00 am
ONT
- PHL
1 stop9h 00m
Southwest
jue. 8/2710:20 am
PHL
- ONT
1 stop8h 50m
Southwest
Deal found 6/8![Southwest logo]()
$289
This Southwest deal was found by Cheapflights users on 6/9. 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.
mar. 9/19:40 am
ONT
- PHL
2 stops9h 05m
Southwest
vie. 9/410:20 am
PHL
- ONT
1 stop8h 50m
Southwest
Deal found 6/9![Southwest logo]()
$293
This Frontier deal was found by Cheapflights users on 6/6. 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.
mié. 8/121:38 pm
ONT
- PHL
1 stop13h 22m
Frontier
mié. 8/1910:46 am
PHL
- ONT
1 stop7h 23m
Frontier
Deal found 6/6![Frontier logo]()
$294
This Orbitz deal was found by Cheapflights users on 6/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/181:27 pm
ONT
- PHL
1 stop13h 53m
Frontier
mar. 8/2512:42 pm
PHL
- ONT
1 stop14h 07m
Frontier
Deal found 6/6![Frontier logo]()
$295
This Frontier deal was found by Cheapflights users on 6/5. 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.
mié. 7/16:47 pm
ONT
- PHL
1 stop12h 43m
Frontier
sáb. 7/411:35 am
PHL
- ONT
1 stop8h 13m
Frontier
Deal found 6/5![Frontier logo]()
$297
Best flights from Ontario to PhiladelphiaDiscover carefully curated flight deals from Ontario to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated junio 10, 2026.
Discover carefully curated flight deals from Ontario to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated junio 10, 2026.
This Southwest deal was found by Cheapflights users on 6/10. 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.
mié. 9/161:50 pm
ONT
- PHL
1 stop7h 00m
Southwest
vie. 9/185:25 am
PHL
- ONT
1 stop7h 55m
Southwest
Deal found 6/10![Southwest logo]()
$286
This Delta deal was found by Cheapflights users on 6/9. 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.
jue. 9/36:00 am
ONT
- PHL
1 stop8h 47m
Delta
jue. 9/107:00 am
PHL
- ONT
1 stop8h 29m
Delta
Deal found 6/9![Delta logo]()
$323
This United Airlines deal was found by Cheapflights users on 6/9. 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.
mar. 8/189:15 am
ONT
- PHL
1 stop10h 16m
United Airlines
mié. 8/1911:03 am
PHL
- ONT
2 stops11h 58m
United Airlines
Deal found 6/9![United Airlines logo]()
$422
This Southwest deal was found by Cheapflights users on 6/9. 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.
sáb. 9/510:15 am
ONT
- PHL
2 stops9h 35m
Southwest
dom. 9/135:00 am
PHL
- ONT
1 stop8h 00m
Southwest
Deal found 6/9![Southwest logo]()
$334
This Delta deal was found by Cheapflights users on 6/8. 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.
jue. 7/166:01 pm
ONT
- PHL
1 stop8h 28m
Delta
mar. 7/286:25 am
PHL
- ONT
1 stop7h 13m
Delta
Deal found 6/8![Delta logo]()
$359
This Delta deal was found by Cheapflights users on 6/6. 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.
vie. 7/106:00 am
ONT
- PHL
1 stop8h 39m
Delta
mar. 7/146:25 am
PHL
- ONT
1 stop7h 13m
Delta
Deal found 6/6![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 6/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/232:15 pm
ONT
- PHL
1 stop6h 55m
Southwest
sáb. 8/298:05 am
PHL
- ONT
2 stops10h 10m
Southwest
Deal found 6/5![Southwest logo]()
$364
This Southwest deal was found by Cheapflights users on 6/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/187:00 am
ONT
- PHL
2 stops8h 00m
Southwest
mar. 8/253:00 pm
PHL
- ONT
2 stops8h 55m
Southwest
Deal found 6/5![Southwest logo]()
$369
This Delta deal was found by Cheapflights users on 6/9. 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.
dom. 8/236:00 am
ONT
- PHL
1 stop8h 47m
Delta
jue. 9/107:00 am
PHL
- ONT
1 stop8h 29m
Delta
Deal found 6/9![Delta logo]()
$373
This Southwest deal was found by Cheapflights users on 6/7. 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.
vie. 7/3112:45 pm
ONT
- PHL
2 stops8h 40m
Southwest
lun. 8/35:00 am
PHL
- ONT
2 stops9h 20m
Southwest
Deal found 6/7![Southwest logo]()
$416
This Southwest deal was found by Cheapflights users on 6/7. 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.
vie. 7/1012:40 pm
ONT
- PHL
2 stops9h 05m
Southwest
mar. 7/144:35 pm
PHL
- ONT
2 stops9h 15m
Southwest
Deal found 6/7![Southwest logo]()
$419
This Southwest deal was found by Cheapflights users on 6/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/99:20 pm
ONT
- PHL
2 stops15h 00m
Southwest
dom. 10/111:40 pm
PHL
- ONT
1 stop7h 15m
Southwest
Deal found 6/6![Southwest logo]()
$430
Last-minute flights from Ontario to PhiladelphiaDiscover last-minute flight deals from Ontario to Philadelphia. Data last updated junio 10, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Philadelphia. Data last updated junio 10, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/6. 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.
sáb. 6/206:47 pm
ONT
- PHL
1 stop12h 43m
Frontier
sáb. 6/2711:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Deal found 6/6![Frontier logo]()
$301
This Expedia deal was found by Cheapflights users on 6/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/223:34 pm
ONT
- PHL
1 stop11h 53m
Frontier
mié. 7/111:06 am
PHL
- ONT
1 stop11h 45m
Frontier
Deal found 6/8![Frontier logo]()
$305
This Frontier deal was found by Cheapflights users on 6/8. 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.
mié. 6/243:34 pm
ONT
- PHL
1 stop11h 53m
Frontier
sáb. 7/412:42 pm
PHL
- ONT
1 stop14h 07m
Frontier
Deal found 6/8![Frontier logo]()
$306
This Frontier deal was found by Cheapflights users on 6/9. 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.
jue. 6/256:47 pm
ONT
- PHL
1 stop12h 43m
Frontier
vie. 8/1411:06 am
PHL
- ONT
1 stop7h 48m
Frontier
Deal found 6/9![Frontier logo]()
$304
This Super.com deal was found by Cheapflights users on 6/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/265:43 pm
ONT
- PHL
1 stop18h 24m
Frontier
sáb. 7/411:35 am
PHL
- ONT
1 stop8h 13m
Frontier
Deal found 6/6![Frontier logo]()
$298
This Trip.com deal was found by Cheapflights users on 6/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/305:43 pm
ONT
- PHL
1 stop18h 24m
Frontier
jue. 7/912:44 pm
PHL
- ONT
1 stop14h 06m
Frontier
Deal found 6/7![Frontier logo]()
$271
This Trip.com deal was found by Cheapflights users on 6/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/305:43 pm
ONT
- PHL
1 stop18h 24m
Frontier
sáb. 7/1111:06 am
PHL
- ONT
1 stop23h 57m
Frontier
Deal found 6/7![Frontier logo]()
$284
This Frontier deal was found by Cheapflights users on 6/9. 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.
mar. 6/301:33 pm
ONT
- PHL
1 stop13h 54m
Frontier
vie. 8/1411:06 am
PHL
- ONT
1 stop7h 48m
Frontier
Deal found 6/9![Frontier logo]()
$300
This Frontier deal was found by Cheapflights users on 6/5. 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.
mié. 7/16:47 pm
ONT
- PHL
1 stop12h 43m
Frontier
sáb. 7/411:35 am
PHL
- ONT
1 stop8h 13m
Frontier
Deal found 6/5![Frontier logo]()
$297
This Booking.com deal was found by Cheapflights users on 6/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/26:47 pm
ONT
- PHL
1 stop12h 43m
Frontier
mié. 7/811:06 am
PHL
- ONT
1 stop23h 57m
Frontier
Deal found 6/6![Frontier logo]()
$303
This Frontier deal was found by Cheapflights users on 6/5. 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.
dom. 7/58:17 am
ONT
- PHL
1 stop13h 44m
Frontier
mar. 7/1412:44 pm
PHL
- ONT
1 stop14h 06m
Frontier
Deal found 6/5![Frontier logo]()
$295
This Booking.com deal was found by Cheapflights users on 6/7. 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.
vie. 7/176:00 am
ONT
- PHL
1 stop20h 39m
Frontier
mar. 7/2111:06 am
PHL
- ONT
1 stop23h 57m
Frontier
Deal found 6/7![Frontier logo]()
$302
One-way flights from Ontario to PhiladelphiaSearch for one-way flight options from Ontario to Philadelphia. Find affordable one-way fares based on user searches. Data last updated junio 10, 2026.
Search for one-way flight options from Ontario to Philadelphia. Find affordable one-way fares based on user searches. Data last updated junio 10, 2026.
This Super.com deal was found by Cheapflights users on 6/5. 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.
mar. 7/148:17 am
ONT
- PHL
1 stop8h 12m
Frontier
Deal found 6/5![Frontier logo]()
$118
This Super.com deal was found by Cheapflights users on 6/5. 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.
lun. 7/208:17 am
ONT
- PHL
1 stop8h 12m
Frontier
Deal found 6/5![Frontier logo]()
$119
This Frontier deal was found by Cheapflights users on 6/9. 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.
sáb. 7/118:17 am
ONT
- PHL
1 stop8h 12m
Frontier
Deal found 6/9![Frontier logo]()
$120
This Super.com deal was found by Cheapflights users on 6/7. 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.
vie. 8/78:17 am
ONT
- PHL
1 stop8h 12m
Frontier
Deal found 6/7![Frontier logo]()
$121
This Super.com deal was found by Cheapflights users on 6/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/88:17 am
ONT
- PHL
1 stop8h 12m
Frontier
Deal found 6/8![Frontier logo]()
$122
This Super.com deal was found by Cheapflights users on 6/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/38:17 am
ONT
- PHL
1 stop8h 12m
Frontier
Deal found 6/8![Frontier logo]()
$123
This Super.com deal was found by Cheapflights users on 6/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/108:17 am
ONT
- PHL
1 stop8h 12m
Frontier
Deal found 6/8![Frontier logo]()
$124
This Frontier deal was found by Cheapflights users on 6/9. 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.
vie. 7/318:17 am
ONT
- PHL
1 stop8h 12m
Frontier
Deal found 6/9![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 6/10. 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.
mar. 7/281:38 pm
ONT
- PHL
1 stop13h 22m
Frontier
Deal found 6/10![Frontier logo]()
$126
This Super.com deal was found by Cheapflights users on 6/10. 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.
mar. 6/305:43 pm
ONT
- PHL
1 stop18h 24m
Frontier
Deal found 6/10![Frontier logo]()
$127
This Frontier deal was found by Cheapflights users on 6/9. 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.
sáb. 7/253:40 pm
ONT
- PHL
1 stop11h 20m
Frontier
Deal found 6/9![Frontier logo]()
$129
Find flight deals from Ontario to Philadelphia
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Philadelphia (PHL). 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 junio 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $271 (Delta) |
One-way from | $118 (Super.com) |
Popular in | October |
Cheapest in | September |
Average price | $418 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Philadelphia 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 junio 10, 2026.
Use the filters below to find and compare flights from Ontario to Philadelphia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
mié. 9/16
1:50 pm-11:50 pm
1 stop7h 00m
Philadelphia
vie. 9/18
5:25 am-10:20 am
1 stop7h 55m
$286
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
jue. 9/3
6:00 am-5:47 pm
1 stop8h 47m
Philadelphia
jue. 9/10
7:00 am-12:29 pm
1 stop8h 29m
$323
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
sáb. 9/5
10:15 am-10:50 pm
2 stops9h 35m
Philadelphia
dom. 9/13
5:00 am-10:00 am
1 stop8h 00m
$334
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
jue. 7/16
6:01 pm-5:29 am
1 stop8h 28m
Philadelphia
mar. 7/28
6:25 am-10:38 am
1 stop7h 13m
$359
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
vie. 7/10
6:00 am-5:39 pm
1 stop8h 39m
Philadelphia
mar. 7/14
6:25 am-10:38 am
1 stop7h 13m
$359
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
dom. 8/23
2:15 pm-12:10 am
1 stop6h 55m
Philadelphia
sáb. 8/29
8:05 am-3:15 pm
2 stops10h 10m
$364
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
mar. 8/18
7:00 am-6:00 pm
2 stops8h 00m
Philadelphia
mar. 8/25
3:00 pm-8:55 pm
2 stops8h 55m
$369
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
dom. 8/23
6:00 am-5:47 pm
1 stop8h 47m
Philadelphia
jue. 9/10
7:00 am-12:29 pm
1 stop8h 29m
$373
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
vie. 7/31
12:45 pm-12:25 am
2 stops8h 40m
Philadelphia
lun. 8/3
5:00 am-11:20 am
2 stops9h 20m
$416
OntarioPhiladelphia
ONT - PHL
ONTPHL
Ontario
vie. 7/10
12:40 pm-12:45 am
2 stops9h 05m
Philadelphia
mar. 7/14
4:35 pm-10:50 pm
2 stops9h 15m
$419
Showing 1-10 of 24 resultsSorted by cheapest first
Compare providers for flights from Ontario to Philadelphia
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 Ontario to Philadelphia in June.
| 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 | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Philadelphia flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Philadelphia 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 Ontario-Philadelphia 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 Ontario to Philadelphia
Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Ontario with our price prediction graph.
ONT-PHL
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 Ontario to Philadelphia
How far ahead should I book a flight from Ontario to Philadelphia?
The best time to book flights from Ontario to Philadelphia is 57 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 Ontario to Philadelphia?
Currently, September is the cheapest month in which you can book a flight from Ontario to Philadelphia (average of $356). Flying from Ontario to Philadelphia in October is currently the most expensive (average of $494). 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 Ontario to Philadelphia?
Reviews of airlines servicing Philadelphia
Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated junio 10, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Ontario to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Ontario to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Philadelphia?
Book flights to Philadelphia if you plan to visit one of these locationsWildwood
King of Prussia
Reading
Camden
Ocean City
Cherry Hill
Lewes
Dewey Beach
Pottstown
Ephrata
Milford
Plymouth Meeting
Wildwood Crest
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Vineland
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Ontario to Philadelphia
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Complete your trip
Complete your trip to Philadelphia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Philadelphia by cabin class
Find flights from Ontario to Philadelphia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Philadelphia flights
Browse other Ontario and Philadelphia flight options. Last updated on junio 10, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on junio 10, 2026.
Other flights to Philadelphia
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on junio 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from Ontario to Philadelphia
Discover the top 5 airlines that operate flights from Ontario to Philadelphia. 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 junio 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$274 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$282 | Average$396 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$300 | Average$458 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$312 | Average$436 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$366 | Average$487 | FlexibilityNo cancel fee | On-time63% |