$91+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHL
Sep 17 — Sep 241
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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
Cheapest
Best
Last-minute
One-way
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 August 18, 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 August 18, 2026.
This Expedia deal was found by Cheapflights users on 8/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:40 pm -
1 stop11h 50m
Tue 9/82:00 pm -
1 stop23h 30m
Deal found 8/13![Frontier logo]()
$142
This FlightHub deal was found by Cheapflights users on 8/13. 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.
Wed 10/1411:52 am -
1 stop8h 59m
Wed 10/215:50 am -
1 stop7h 39m
Deal found 8/13![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 10/246:15 am -
1 stop16h 01m
Wed 10/287:10 am -
2 stops19h 45m
Deal found 8/15![Frontier logo]()
$188
This FlightHub deal was found by Cheapflights users on 8/13. 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.
Sat 10/176:15 am -
1 stop16h 01m
Thu 10/225:50 am -
1 stop7h 39m
Deal found 8/13![Frontier logo]()
$191
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/23:40 pm -
1 stop11h 50m
Tue 9/810:15 pm -
1 stop13h 54m
Deal found 8/13![Frontier logo]()
$194
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/313:40 pm -
1 stop11h 50m
Tue 9/82:00 pm -
1 stop12h 50m
Deal found 8/13![Frontier logo]()
$201
This CheapOair deal was found by Cheapflights users on 8/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:17 pm -
1 stop29h 13m
Sat 9/126:00 am -
1 stop13h 46m
Deal found 8/13![Frontier logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Thu 9/33:40 pm -
2 stops38h 11m
Sat 9/126:00 am -
1 stop13h 46m
Deal found 8/13![Frontier logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 10/72:30 pm -
2 stops18h 03m
Wed 10/145:50 am -
1 stop7h 39m
Deal found 8/13![Frontier logo]()
$241
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 August 18, 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 August 18, 2026.
This United Airlines deal was found by Cheapflights users on 8/13. 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 9/37:13 pm -
2 stops14h 10m
Sat 9/1210:05 am -
2 stops12h 56m
Deal found 8/13![United Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 8/17. 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.
Sat 9/1212:17 pm -
1 stop9h 23m
Tue 9/155:20 am -
1 stop8h 45m
Deal found 8/17![Delta logo]()
$371
This Southwest deal was found by Cheapflights users on 8/16. 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.
Fri 10/21:05 pm -
2 stops8h 55m
Mon 10/55:10 pm -
2 stops9h 35m
Deal found 8/16![Southwest logo]()
$390
This Alaska Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:02 am -
1 stop20h 39m
Wed 10/147:02 am -
2 stops13h 03m
Deal found 8/17![Alaska Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 8/17. 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.
Fri 12/256:00 am -
1 stop8h 40m
Fri 1/16:35 am -
1 stop7h 52m
Deal found 8/17![Delta logo]()
$380
This Southwest deal was found by Cheapflights users on 8/16. 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 10/1512:00 pm -
2 stops10h 00m
Mon 10/193:20 pm -
2 stops9h 55m
Deal found 8/16![Southwest logo]()
$415
This Delta deal was found by Cheapflights users on 8/15. 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 9/176:00 pm -
1 stop8h 50m
Fri 9/186:52 pm -
1 stop7h 55m
Deal found 8/15![Delta logo]()
$380
This United Airlines deal was found by Cheapflights users on 8/17. 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 11/131:29 pm -
1 stop7h 10m
Sat 11/141:16 pm -
1 stop8h 31m
Deal found 8/17![United Airlines logo]()
$479
This Alaska Airlines deal was found by Cheapflights users on 8/16. 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 9/223:14 pm -
1 stop23h 42m
Wed 9/307:00 am -
1 stop10h 16m
Deal found 8/16![Alaska Airlines logo]()
$482
This Delta deal was found by Cheapflights users on 8/16. 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 9/212:00 pm -
1 stop8h 42m
Sun 9/66:00 am -
1 stop7h 42m
Deal found 8/16![Delta logo]()
$401
This Delta deal was found by Cheapflights users on 8/15. 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 9/1410:00 pm -
1 stop8h 27m
Sun 9/205:20 am -
1 stop8h 49m
Deal found 8/15![Delta logo]()
$424
This Delta deal was found by Cheapflights users on 8/15. 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 9/176:00 pm -
1 stop8h 50m
Sun 9/205:20 am -
1 stop8h 49m
Deal found 8/15![Delta logo]()
$435
Last-minute flights from Ontario to PhiladelphiaDiscover last-minute flight deals from Ontario to Philadelphia. Data last updated August 18, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Philadelphia. Data last updated August 18, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/313:40 pm -
1 stop11h 50m
Tue 9/82:00 pm -
1 stop12h 50m
Deal found 8/13![Frontier logo]()
$201
This Booking.com deal was found by Cheapflights users on 8/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:00 am -
1 stop20h 39m
Tue 9/18:00 am -
1 stop10h 49m
Deal found 8/14![Frontier logo]()
$249
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:40 pm -
1 stop11h 50m
Wed 9/28:00 am -
1 stop10h 49m
Deal found 8/14![Frontier logo]()
$245
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/23:40 pm -
1 stop11h 50m
Tue 9/810:15 pm -
1 stop13h 54m
Deal found 8/13![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Thu 9/33:40 pm -
2 stops38h 11m
Sat 9/126:00 am -
1 stop13h 46m
Deal found 8/13![Frontier logo]()
$221
This CheapOair deal was found by Cheapflights users on 8/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:17 pm -
1 stop29h 13m
Sat 9/126:00 am -
1 stop13h 46m
Deal found 8/13![Frontier logo]()
$216
This Expedia deal was found by Cheapflights users on 8/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:40 pm -
1 stop11h 50m
Tue 9/82:00 pm -
1 stop23h 30m
Deal found 8/13![Frontier logo]()
$142
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1212:17 pm -
1 stop9h 23m
Sat 9/196:00 am -
1 stop8h 05m
Deal found 8/13![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Mon 9/216:08 am -
1 stop8h 22m
Thu 9/246:00 am -
1 stop9h 18m
Deal found 8/13![United Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2211:45 am -
2 stops16h 31m
Tue 9/296:00 am -
1 stop13h 46m
Deal found 8/15![Frontier logo]()
$269
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 August 18, 2026.
Search for one-way flight options from Ontario to Philadelphia. Find affordable one-way fares based on user searches. Data last updated August 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Mon 10/1211:52 am -
1 stop10h 24m
Deal found 8/13![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 8/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:17 pm -
1 stop29h 13m
Deal found 8/14![Frontier logo]()
$107
This Super.com deal was found by Cheapflights users on 8/13. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am -
1 stop20h 39m
Deal found 8/13![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 10/611:45 am -
2 stops32h 33m
Deal found 8/16![Frontier logo]()
$121
This Super.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:35 pm -
1 stop7h 43m
Deal found 8/17![Frontier logo]()
$123
This Frontier deal was found by Cheapflights users on 8/17. 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 10/98:35 pm -
1 stop7h 43m
Deal found 8/17![Frontier logo]()
$125
This Super.com deal was found by Cheapflights users on 8/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:52 am -
1 stop10h 24m
Deal found 8/14![Frontier logo]()
$129
This Frontier deal was found by Cheapflights users on 8/17. 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 10/1511:52 am -
1 stop10h 24m
Deal found 8/17![Frontier logo]()
$131
This FlightHub deal was found by Cheapflights users on 8/18. 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.
Thu 10/86:15 am -
1 stop16h 01m
Deal found 8/18![Frontier logo]()
$134
This Trip.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:15 am -
2 stops13h 27m
Deal found 8/17![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Thu 9/106:15 am -
2 stops13h 27m
Deal found 8/17![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Thu 10/111:45 am -
2 stops49h 42m
Deal found 8/16![Frontier logo]()
$145
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 August 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $142 (Expedia) |
One-way from | $91 (Kiwi.com) |
Popular in | December |
Cheapest in | July |
Average price | $424 |
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 August 18, 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
Thu 9/3
7:13 pm-12:23 pm
2 stops14h 10m
Philadelphia
Sat 9/12
10:05 am-8:01 pm
2 stops12h 56m
$361
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Sat 9/12
12:17 pm-12:40 am
1 stop9h 23m
Philadelphia
Tue 9/15
5:20 am-11:05 am
1 stop8h 45m
$371
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Fri 12/25
6:00 am-5:40 pm
1 stop8h 40m
Philadelphia
Fri 1/1
6:35 am-11:27 am
1 stop7h 52m
$380
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Thu 9/17
6:00 pm-5:50 am
1 stop8h 50m
Philadelphia
Fri 9/18
6:52 pm-11:47 pm
1 stop7h 55m
$380
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Fri 10/2
1:05 pm-1:00 am
2 stops8h 55m
Philadelphia
Mon 10/5
5:10 pm-11:45 pm
2 stops9h 35m
$390
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Wed 9/2
12:00 pm-11:42 pm
1 stop8h 42m
Philadelphia
Sun 9/6
6:00 am-10:42 am
1 stop7h 42m
$401
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Thu 10/15
12:00 pm-1:00 am
2 stops10h 00m
Philadelphia
Mon 10/19
3:20 pm-10:15 pm
2 stops9h 55m
$415
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Mon 9/14
10:00 pm-9:27 am
1 stop8h 27m
Philadelphia
Sun 9/20
5:20 am-11:09 am
1 stop8h 49m
$424
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Thu 9/17
6:00 pm-5:50 am
1 stop8h 50m
Philadelphia
Sun 9/20
5:20 am-11:09 am
1 stop8h 49m
$435
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Wed 10/7
6:02 am-5:41 am
1 stop20h 39m
Philadelphia
Wed 10/14
7:02 am-5:05 pm
2 stops13h 03m
$459
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 August.
| 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 | |
| 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 18 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 $497). 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 $370 and $474 in October.The cheapest round-trip price found within the last 5 days was $153 on Frontier (Oct 14-Oct 21).
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 August 18, 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.
Overall
8.0
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
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
Wildwood Crest
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Pottstown
Ephrata
Milford
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Ontario
Philadelphia flight routes
Popular flights
Alternative routes for Ontario to Philadelphia
See prices for flight routes from nearby airports that may be better suited for you.
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 August 18, 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 August 18, 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 August 18, 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 August 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$274 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$282 | Average$428 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$305 | Average$438 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$312 | Average$462 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$346 | Average$456 | FlexibilityNo cancel fee | On-time63% |