Cheap Flights from Ontario, CA to Philadelphia, PA from $111

On Cheapflightsplus.com you will find 156 connecting flights from Ontario to Philadelphia. You can compare airfare deals from 4 airlines and multiple travel sites from $111, book and save on cheap plane tickets and last minute offers. Also check out ONT-PHL flight schedule to find best flight time, convenient departure and arrival airports.

Flight Information

Below we will explain in detail what the flights cost on the destination from Ontario to Philadelphia depends on and how to choose the most interesting flight option for you.

Distance between Ontario and Philadelphia is 3783 miles. Time difference between the cities is 3h. Airplanes depart 00:59 to 19:36 from 2 Ontario airports and arrive 00:59 to 19:36 to 4 Philadelphia airports. Average flight time is 15h 21m.

  • The fastest flight 6h 45m
  • Average flight time 15h 21m
  • The earliest flight 00:59
  • The latest flight 19:36
  • Distance 2351 ml

The cheapest months to travel to Philadelphia are july (from 111 $), august (from 113 $), february (from 215 $).

The most expensive months are november (from 599 $), december (from 260 $), september (from 236 $).

What is the lowest airfare Ontario to Philadelphia?

The cheapest plane ticket found by our users is $111. This airfare is for economy class on one-way F91358 flight by Frontier Airlines for July 6, 2025 which leaves Ontario Int. in Ontario at 17:14 am and arrives at Philadelphia Philadelphia Int. at 05:49.

Economy class
$111
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Business class
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First class
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Flight Schedule Ontario (California) to Philadelphia (Pennsylvania)

00:59 — 05:09+1day
25h 10m flight time
Find flight
from$119
00:59 — 04:19 Ontario — Denver
F91500 Frontier Airlines
19h 11m stop
23:30 — 05:09 Denver — Philadelphia
F93340 Frontier Airlines
00:59 — 22:09
18h 10m flight time
Find flight
from$149
00:59 — 04:19 Ontario — Denver
F91500 Frontier Airlines
12h 6m stop
16:25 — 22:09 Denver — Philadelphia
F93266 Frontier Airlines
05:05 — 15:35
7h 30m flight time
Find flight
from$232
05:05 — 08:23 Ontario — Denver
UA1575 United Airlines
1h 33m stop
10:25 — 16:04 Denver — Philadelphia
UA2679 United Airlines
06:10 — 17:22
8h 12m flight time
Find flight
from$232
06:10 — 07:37 Ontario — San Francisco
UA277 United Airlines
1h 18m stop
08:55 — 17:22 San Francisco — Philadelphia
UA706 United Airlines
07:00 — 05:49+1day
19h 49m flight time
Find flight
from$133
06:00 — 07:13 Ontario — Las Vegas
F92232 Frontier Airlines
13h 43m stop
21:54 — 05:49 Las Vegas — Philadelphia
F91602 Frontier Airlines
07:00 — 17:36
7h 36m flight time
Find flight
from$232
07:00 — 13:03 Ontario — Chicago
UA356 United Airlines
1h 17m stop
14:20 — 17:36 Chicago — Philadelphia
UA1617 United Airlines
07:02 — 17:35
7h 33m flight time
Find flight
from$228
07:00 — 13:03 Ontario — Chicago
UA2226 United Airlines
1h 10m stop
14:15 — 17:35 Chicago — Philadelphia
UA1617 United Airlines
13:15 — 23:06
6h 51m flight time
Find flight
from$228
13:15 — 16:32 Ontario — Denver
UA1417 United Airlines
1h stop
17:31 — 23:06 Denver — Philadelphia
UA360 United Airlines
13:19 — 23:30
7h 11m flight time
Find flight
from$231
13:15 — 16:32 Ontario — Denver
UA1697 United Airlines
1h 13m stop
17:49 — 23:30 Denver — Philadelphia
UA360 United Airlines
17:14 — 05:49+1day
9h 35m flight time
Find flight
from$111
12:28 — 13:49 Ontario — Las Vegas
F91358 Frontier Airlines
3h 26m stop
22:46 — 06:49 Las Vegas — Philadelphia
F91602 Frontier Airlines
17:21 — 05:09+1day
8h 48m flight time
Find flight
from$113
17:21 — 20:44 Ontario — Denver
F92908 Frontier Airlines
2h 46m stop
23:30 — 05:09 Denver — Philadelphia
F93340 Frontier Airlines
17:21 — 22:09+1day
25h 48m flight time
Find flight
from$163
17:21 — 20:44 Ontario — Denver
F92908 Frontier Airlines
19h 41m stop
16:25 — 22:09 Denver — Philadelphia
F93266 Frontier Airlines
18:36 — 05:26+1day
7h 50m flight time
Find flight
from$228
18:30 — 19:49 Ontario — San Francisco
UA393 United Airlines
1h 9m stop
21:05 — 05:26 San Francisco — Philadelphia
UA2110 United Airlines
18:38 — 05:35+1day
7h 57m flight time
Find flight
from$231
18:31 — 21:50 Ontario — Denver
UA368 United Airlines
2h 4m stop
23:59 — 05:37 Denver — Philadelphia
UA1218 United Airlines
19:36 — 05:49+1day
7h 13m flight time
Find flight
from$143
19:22 — 20:35 Ontario — Las Vegas
F94758 Frontier Airlines
1h 12m stop
21:54 — 05:49 Las Vegas — Philadelphia
F91602 Frontier Airlines
Full flight schedule will help you in detecting at what time planes fly from Ontario to Philadelphia. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
*Departure and arrival times - local. Updated on October 16, 2025.

Popular Airlines on the Route

The flight Ontario — Philadelphia is served by 4 regular airlines and 1 low-cost airline. Most of the flights on this route are operated by Alaska Airlines - 47 departures per week at the price of from $ 244 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 801.

Direct flights

There’re no direct flights on this route. Try flights with stops.

Connecting Flights

There are 156 flights with layovers on the route. The fastest connecting flight is UA1942 by United Airlines takes 6h 45m and the cheapest is F91358 by Frontier Airlines for $111.

  • AS - Alaska Airlines
    from $244
    Find
  • F9 - Frontier Airlines
    from $111
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  • HA - Hawaiian Airlines
    from $235
    Find
  • UA - United Airlines
    from $228
    Find
See more connecting flights

Airports

You can fly from Ontario to Philadelphia from 2 airports (Ontario Int., International Heliport).

Ontario airports

  • Ontario Int.-ONT
    from $111
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  • International Heliport-JIO
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Philadelphia airports

  • Philadelphia Int.-PHL
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  • North Philadelphia-PNE
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  • Mustin Alf-MUV
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  • Philadelphia Sea Plane Base-PSQ
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How to book a plane ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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