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Cheap flights Ontario — Philadelphia

Ontario (ONT, US) Philadelphia (PHL, US)
from $141 3 792 km ~4h 58m 3 flights found 3 airlines cheapest on Sunday
Reverse route
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
Choose your departure date
Cheapest: $141 on 20.12.2026
Prices shown are from searches by other travellers over the last 24 hours. Missing a date? Click any day — we'll find tickets anyway.
November 2026
Mo
Tu
We
Th
Fr
Sa
Su
December 2026
Mo
Tu
We
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Fr
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Su
January 2027
Mo
Tu
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Th
Fr
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Prices found for 3 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
20 Dec 2026, Sun
Frontier Airlines F9 1406
06:10
ONT Ontario International Airport
12:33
PHL Philadelphia International Airport
6h 23m 1 stop
Flightnetwork
$141
View this ticket
06 Jan 2027, Wed
United Airlines UA 1263
00:42
ONT Ontario International Airport
06:38
PHL Philadelphia International Airport
5h 56m 1 stop
Trip.com
$246
View this ticket
18 Nov 2026, Wed
Alaska Airlines AS 571
03:09
ONT Ontario International Airport
11:00
PHL Philadelphia International Airport
7h 51m 1 stop
Wowtickets
$255
View this ticket
Route characteristics
Distance
3 792 km
Flight time
4h 58m
Time difference
+3h
Minimum price
from $141 (20.12.2026)
Average price
$214
Maximum price
$255
Cheapest day
Sunday
Departure airports (1)
ONT Ontario International Airport
Arrival airports (1)
PHL Philadelphia International Airport
Airlines (3)
F9 Frontier Airlines UA United Airlines AS Alaska Airlines
Agencies (3)
Flightnetwork Trip.com Wowtickets
Prices by day of week
Wednesday
$246
avg $251
Sunday
$141
avg $141
Cheapest
Price trend by month
November 2026
from $255
avg $255
1 flights
December 2026
from $141
avg $141
1 flights
January 2027
from $246
avg $246
1 flights
Airlines — cheapest prices 3
Frontier Airlines
Frontier Airlines
Low-cost 1 flights · 1 days
$141
United Airlines
United Airlines
1 flights · 1 days
$246
Alaska Airlines
Alaska Airlines
1 flights · 1 days
$255
Where to buy tickets 3
Flightnetwork
1 tickets · 1 days
from $141
Trip.com
1 tickets · 1 days
from $246
Wowtickets
1 tickets · 1 days
from $255
Airports

From — Ontario (1)

  • ONT Ontario International Airport

To — Philadelphia (1)

  • PHL Philadelphia International Airport
Other destinations from Ontario
Albuquerque
US
Accra
GH
Nantucket
US
Adelaide
AU
San Andres Island
CO
Malaga
ES · Hub
Auckland
NZ
Almaty
KZ
Alicante
ES
Ahmedabad
IN
Amsterdam
NL · Hub
Anchorage
US
Frequently asked questions about the route Ontario — Philadelphia
How long is the flight from Ontario to Philadelphia?
Approximate flight time — 4h 58m. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from Ontario to Philadelphia?
The straight-line distance — 3 792 km.
How much do flights from Ontario to Philadelphia cost?
The minimum price over 3 months — from $141 on 20.12.2026.
What is the average ticket price?
The average price — $214. Range: $141 — $255.
What is the time difference between Ontario and Philadelphia?
The difference — +3h.
From which airports does Ontario operate flights?
From Ontario: ONT (Ontario International Airport).
To which airports in Philadelphia do flights arrive?
To Philadelphia: PHL (Philadelphia International Airport).
Which airlines fly this route?
This route is served by 3 airlines: Frontier Airlines, United Airlines, Alaska Airlines.
Which day of the week is cheapest?
The cheapest day of the week — Sunday.
When is the best time to buy tickets?
Optimal — 1–3 months before departure. Check the calendar above — it shows the best dates.
How do I book flights?
Click "View this ticket" on any flight card — you'll be redirected to the booking page with this specific ticket pre-selected.
About the route Ontario — Philadelphia

Flights Ontario — Philadelphia is a popular route. The straight-line distance is 3 792 km. Flight time 4h 58m. Time difference +3h.

From Ontario (ONT) flights depart from 1 airport: ONT. To Philadelphia (PHL) — 1 arrival airport: PHL.

3 airlines operate on this route: Frontier Airlines, United Airlines, Alaska Airlines.

The minimum price for the next 3 months — from $141 (20.12.2026). The cheapest dates are highlighted in the calendar above.

The average ticket price — $214, ranging from $141 to $255. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Sunday.

Other destinations in United States from Ontario
Phoenix
US
Oklahoma City
US
Omaha
US
Orlando
US
Everett
US
West Palm Beach
US
Portland
US
Providence
US

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