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Cheap Flights from Ontario International to Philadelphia International

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Compare Ontario International to Philadelphia International flight deals

Find the cheapest month or even day of the year to fly to Philadelphia International

Book the best Philadelphia International fare with no extra fees

Flight deals from Ontario International to Philadelphia International

Looking for a cheap last-minute deal or the best return flight from Ontario International to Philadelphia International? Find the lowest prices on one-way and return tickets right here.
Philadelphia.SAR 266 per passenger.Departing Tue, 29 Apr.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Tue, 29 Apr, arriving in Philadelphia International.Price includes taxes and charges.From SAR 266, select.
Philadelphia.SAR 266 per passenger.Departing Mon, 12 May.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Mon, 12 May, arriving in Philadelphia International.Price includes taxes and charges.From SAR 266, select.
Philadelphia.SAR 329 per passenger.Departing Tue, 11 Mar.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Tue, 11 Mar, arriving in Philadelphia International.Price includes taxes and charges.From SAR 329, select.
Philadelphia.SAR 365 per passenger.Departing Thu, 27 Feb.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Thu, 27 Feb, arriving in Philadelphia International.Price includes taxes and charges.From SAR 365, select.
Philadelphia.SAR 781 per passenger.Departing Thu, 18 Sep.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Thu, 18 Sep, arriving in Philadelphia International.Price includes taxes and charges.From SAR 781, select.
Philadelphia.SAR 782 per passenger.Departing Thu, 14 Aug.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Thu, 14 Aug, arriving in Philadelphia International.Price includes taxes and charges.From SAR 782, select.
Philadelphia.SAR 784 per passenger.Departing Thu, 6 Nov.One-way flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Thu, 6 Nov, arriving in Philadelphia International.Price includes taxes and charges.From SAR 784, select.
Philadelphia.SAR 784 per passenger.Departing Thu, 2 Oct.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Ontario International on Thu, 2 Oct, arriving in Philadelphia International.Price includes taxes and charges.From SAR 784, select.

Find the cheapest month to fly from Ontario International to Philadelphia International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Philadelphia International flights are currently cheapest in April.
Feb
from SAR 365
Mar
from SAR 329
Apr
from SAR 266
May
from SAR 266
Jun
from SAR 784
Jul
from SAR 805
Aug
from SAR 782
Sep
from SAR 781
Oct
from SAR 784
Nov
from SAR 784
Dec
Find prices
Jan
Find prices

Ontario International to Philadelphia International: Alternative routes

Compare routes from Ontario International to Philadelphia below. You may find an airport to fly into that's cheaper, faster, or easier than Philadelphia International.

Ontario to Philadelphia: Flight information

The things to know before you go.
Cheapest flight foundSAR 266
Cheapest month to flyApril

Finding cheap flights from Ontario International to Philadelphia International: Frequently asked questions

The best price we found for a return flight from Ontario International to Philadelphia International is SAR 489. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Ontario International to Philadelphia International. But we found flights with one or more stops from SAR 489.
As of February 2025, there are no flights flying from Ontario International to Philadelphia International.
The cheapest month to fly from Ontario International to Philadelphia International is usually February 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Philadelphia International Airport on Wednesday, 7 May 2025.
No airlines currently offer direct flights between Ontario International Airport and Philadelphia International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Philadelphia International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Philadelphia is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Philadelphia International.

How to find cheap flights to Philadelphia International

Looking for cheap flights to Philadelphia International? Here are a few tips on how to secure the best price and make your flight journey as smooth as possible.

  • Simply hit 'search'. We've compared hundreds of online travel agents along with all major airlines flying to Philadelphia International to find the cheapest plane tickets. And with us there are no hidden fees - what you see is what you pay.
  • Compare flight deals to Philadelphia International from over 1,000 providers. Then choose the cheapest or fastest plane tickets.
  • Flex your dates to score the best fares for your Philadelphia International flight. If your travel dates are flexible, use Skyscanner's 'Whole month' tool to find the cheapest month, and even day to fly to Philadelphia International.
  • Set up a Price Alert. You can easily track the price of your cheap flights to Philadelphia International by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible Philadelphia International flight deal.
  • Fly without stops. Only interested in direct flights? Make sure to tick 'Direct flights only' when performing a search. If there are direct flights to Philadelphia International available, these will appear in the results.
  • Find the cheapest Business class flights to Philadelphia International. We scour the internet for the best Business, Premium Economy and First Class flight fares to Philadelphia International, too. Check the difference in price as you search – you might just chance upon a last-minute low fare.
  • Include nearby airports in your search. Widen your search for Philadelphia International flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.

    • Combine your flight to Philadelphia International with hotels and car hire

    Once you've secured your cheap ticket to Philadelphia International, discover the best prices and exclusive rates for hotels in Philadelphia International. You can also compare hundreds of car hire companies in one go so that you get the best car rental price for your trip.

    Compare Philadelphia International flight tickets with other destinations using the everywhere search

    Not entirely set on flying to Philadelphia International yet? You can easily browse other destinations by searching flights to 'Everywhere' - this will allow you to find the cheapest place to travel from your departure point.


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Plan the rest of your trip from Ontario to Philadelphia

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.