$110+ Cheap flights from Ontario to Philadelphia (ONT - PHL)
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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHL
Nov 13 — Nov 201
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Philadelphia 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 Ontario to Philadelphia
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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 October 14, 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 October 14, 2026.
This Mytrip deal was found by Cheapflights users on 10/12. 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.
Wed 11/116:30 am -
2 stops21h 41m
Mon 11/165:14 pm -
2 stops20h 21m
Deal found 10/12![Frontier logo]()
$252
This Cheapflightsfares deal was found by Cheapflights users on 10/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/202:01 pm -
1 stop13h 00m
Mon 11/239:55 pm -
1 stop24h 41m
Deal found 10/9![Frontier logo]()
$266
This Mytrip deal was found by Cheapflights users on 10/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/311:52 am -
2 stops16h 29m
Tue 11/106:00 am -
1 stop13h 38m
Deal found 10/10![Frontier logo]()
$267
This Booking.com deal was found by Cheapflights users on 10/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:25 pm -
1 stop10h 53m
Tue 10/136:00 am -
1 stop13h 48m
Deal found 10/9![Frontier logo]()
$274
This Mytrip deal was found by Cheapflights users on 10/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:30 am -
2 stops21h 51m
Wed 11/1112:36 pm -
2 stops14h 15m
Deal found 10/9![Frontier logo]()
$279
This CheapOair deal was found by Cheapflights users on 10/12. 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.
Sat 11/2110:47 pm -
1 stop28h 14m
Thu 11/269:55 pm -
1 stop12h 25m
Deal found 10/12![Frontier logo]()
$280
This Mytrip deal was found by Cheapflights users on 10/13. 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.
Sat 11/2110:47 pm -
1 stop28h 14m
Fri 11/279:55 pm -
1 stop12h 25m
Deal found 10/13![Frontier logo]()
$282
This Cheapflightsfares deal was found by Cheapflights users on 10/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1810:05 am -
1 stop15h 58m
Sun 12/206:25 am -
1 stop14h 08m
Deal found 10/10![Frontier logo]()
$284
This Mytrip deal was found by Cheapflights users on 10/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:52 am -
2 stops16h 19m
Sat 11/1412:36 pm -
2 stops14h 15m
Deal found 10/10![Frontier logo]()
$286
This Mytrip deal was found by Cheapflights users on 10/11. 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.
Sat 11/146:30 am -
2 stops13h 54m
Tue 11/175:14 pm -
2 stops20h 21m
Deal found 10/11![Frontier logo]()
$288
This CheapOair deal was found by Cheapflights users on 10/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/226:45 am -
1 stop19h 40m
Sun 12/206:25 am -
1 stop14h 08m
Deal found 10/9![Frontier logo]()
$289
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 October 14, 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 October 14, 2026.
This Delta deal was found by Cheapflights users on 10/9. 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.
Thu 11/125:04 pm -
1 stop9h 51m
Sun 11/155:15 am -
1 stop8h 48m
Deal found 10/9![Delta logo]()
$368
This Southwest deal was found by Cheapflights users on 10/12. 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 11/21:20 pm -
1 stop7h 45m
Sat 11/711:30 am -
2 stops10h 20m
Deal found 10/12![Southwest logo]()
$374
This United Airlines deal was found by Cheapflights users on 10/13. 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 12/106:00 am -
1 stop8h 21m
Sun 12/136:19 am -
2 stops9h 15m
Deal found 10/13![United Airlines logo]()
$384
This Delta deal was found by Cheapflights users on 10/9. 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.
Wed 1/206:00 am -
1 stop8h 40m
Sun 1/246:35 am -
1 stop7h 52m
Deal found 10/9![Delta logo]()
$369
This Southwest deal was found by Cheapflights users on 10/9. 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.
Thu 11/1212:10 pm -
2 stops9h 00m
Sun 11/155:00 am -
1 stop7h 55m
Deal found 10/9![Southwest logo]()
$383
This Delta deal was found by Cheapflights users on 10/12. 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 11/267:05 am -
1 stop8h 52m
Thu 12/36:59 pm -
1 stop7h 58m
Deal found 10/12![Delta logo]()
$369
This Southwest deal was found by Cheapflights users on 10/13. 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 11/1811:25 am -
1 stop7h 45m
Thu 12/32:45 pm -
2 stops10h 20m
Deal found 10/13![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 10/11. 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 12/1210:30 am -
2 stops9h 20m
Tue 12/155:00 am -
2 stops9h 55m
Deal found 10/11![Southwest logo]()
$388
This United Airlines deal was found by Cheapflights users on 10/11. 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.
Sat 1/97:00 am -
1 stop7h 44m
Sat 1/169:00 am -
1 stop9h 18m
Deal found 10/11![United Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 10/11. 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 1/216:00 am -
1 stop7h 31m
Fri 1/2211:20 am -
1 stop10h 30m
Deal found 10/11![United Airlines logo]()
$499
This Delta deal was found by Cheapflights users on 10/9. 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.
Sun 11/226:00 am -
1 stop8h 38m
Thu 12/176:59 pm -
1 stop7h 58m
Deal found 10/9![Delta logo]()
$479
This United Airlines deal was found by Cheapflights users on 10/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/86:37 pm -
1 stop10h 08m
Sat 1/169:00 am -
1 stop9h 18m
Deal found 10/10![United Airlines logo]()
$499
Last-minute flights from Ontario to PhiladelphiaDiscover last-minute flight deals from Ontario to Philadelphia. Data last updated October 14, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Philadelphia. Data last updated October 14, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 10/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/311:52 am -
2 stops16h 29m
Tue 11/106:00 am -
1 stop13h 38m
Deal found 10/10![Frontier logo]()
$267
This Mytrip deal was found by Cheapflights users on 10/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:25 am -
2 stops13h 51m
Tue 11/175:14 pm -
2 stops20h 21m
Deal found 10/10![Frontier logo]()
$284
This Mytrip deal was found by Cheapflights users on 10/13. 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.
Tue 11/106:30 am -
2 stops21h 51m
Tue 11/175:14 pm -
2 stops20h 21m
Deal found 10/13![Frontier logo]()
$274
This Mytrip deal was found by Cheapflights users on 10/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:30 am -
2 stops21h 51m
Wed 11/1112:36 pm -
2 stops14h 15m
Deal found 10/9![Frontier logo]()
$279
This Mytrip deal was found by Cheapflights users on 10/12. 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.
Wed 11/116:30 am -
2 stops21h 41m
Mon 11/165:14 pm -
2 stops20h 21m
Deal found 10/12![Frontier logo]()
$252
This Mytrip deal was found by Cheapflights users on 10/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:52 am -
2 stops16h 19m
Sat 11/1412:36 pm -
2 stops14h 15m
Deal found 10/10![Frontier logo]()
$286
This Mytrip deal was found by Cheapflights users on 10/14. 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.
Thu 11/126:30 am -
2 stops21h 51m
Tue 11/175:14 pm -
2 stops20h 21m
Deal found 10/14![Frontier logo]()
$275
This Mytrip deal was found by Cheapflights users on 10/12. 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.
Fri 11/1311:52 am -
2 stops16h 29m
Tue 11/175:14 pm -
2 stops20h 21m
Deal found 10/12![Frontier logo]()
$282
This Cheapflightsfares deal was found by Cheapflights users on 10/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/202:01 pm -
1 stop13h 00m
Mon 11/239:55 pm -
1 stop24h 41m
Deal found 10/9![Frontier logo]()
$266
This Cheapflightsfares deal was found by Cheapflights users on 10/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/202:01 pm -
1 stop13h 00m
Fri 11/279:55 pm -
1 stop12h 25m
Deal found 10/14![Frontier logo]()
$276
This CheapOair deal was found by Cheapflights users on 10/12. 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.
Sat 11/2110:47 pm -
1 stop28h 14m
Thu 11/269:55 pm -
1 stop12h 25m
Deal found 10/12![Frontier logo]()
$280
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 October 14, 2026.
Search for one-way flight options from Ontario to Philadelphia. Find affordable one-way fares based on user searches. Data last updated October 14, 2026.
This Mytrip deal was found by Cheapflights users on 10/11. 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.
Tue 11/106:30 am -
2 stops13h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Frontier logo]()
$110
This Mytrip deal was found by Cheapflights users on 10/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/311:52 am -
2 stops16h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 11/1111:52 am -
2 stops16h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Frontier logo]()
$122
This Mytrip deal was found by Cheapflights users on 10/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:30 am -
2 stops13h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Frontier logo]()
$134
This Super.com deal was found by Cheapflights users on 10/11. 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.
Wed 11/2511:40 am -
1 stop14h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Frontier logo]()
$138
This Cheapflightsfares deal was found by Cheapflights users on 10/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/226:08 pm -
1 stop13h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Frontier logo]()
$139
This Frontier deal was found by Cheapflights users on 10/11. 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 11/262:01 pm -
1 stop13h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Frontier logo]()
$141
This FlightHub deal was found by Cheapflights users on 10/13. 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.
Mon 11/232:01 pm -
1 stop13h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Frontier logo]()
$144
This CheapOair deal was found by Cheapflights users on 10/12. 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.
Thu 12/1710:05 am -
1 stop15h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Frontier logo]()
$146
This Super.com deal was found by Cheapflights users on 10/12. 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.
Sun 12/209:59 pm -
1 stop28h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Frontier logo]()
$147
This Frontier deal was found by Cheapflights users on 10/11. 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 11/244:13 pm -
1 stop10h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Frontier logo]()
$150
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 October 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $252 (Mytrip) |
One-way from | $110 (Mytrip) |
Popular in | December |
Cheapest in | July |
Average price | $508 |
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 7,457,451 searches. Data last updated October 14, 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
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Wed 1/13
7:00 am-5:15 pm
1 stop7h 15m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Tue 11/10
6:00 am-5:38 pm
1 stop8h 38m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
Quickest round-trip
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Fri 12/11
12:20 pm-10:13 pm
1 stop6h 53m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Fri 1/15
12:00 pm-12:51 am
1 stop9h 51m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Thu 11/12
5:04 pm-5:55 am
1 stop9h 51m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Mon 4/12
10:59 pm-9:27 am
1 stop7h 28m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Mon 12/7
11:08 pm-9:29 am
1 stop7h 21m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Sat 1/16
6:00 am-5:40 pm
1 stop8h 40m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Thu 11/5
6:00 pm-5:44 am
1 stop8h 44m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Wed 12/9
12:20 pm-12:52 am
1 stop9h 32m
Philadelphia
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
Showing 1-10 of 22 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 October.
| 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 Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 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 38 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, July is the cheapest month in which you can book a flight from Ontario to Philadelphia (average of $358). Flying from Ontario to Philadelphia in December is currently the most expensive (average of $521). 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?
Airfare is below average for this route at the moment.
Ontario to Philadelphia flights typically cost between $379 and $556 in November.The cheapest round-trip price found within the last 5 days was $252 on Frontier (Nov 11-Nov 16).
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 October 14, 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.
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
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
Wildwood Crest
Dover
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Pottstown
Milford
Ephrata
Elkton
Essington
New Castle
Willow Grove
Glen Mills
Vineland
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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 October 14, 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 October 14, 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 October 14, 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 7,457,451 searches. Data last updated October 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$157 | Average$279 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$282 | Average$454 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$312 | Average$462 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$321 | Average$446 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$346 | Average$428 | FlexibilityNo cancel fee | On-time63% |