Cheap flights from Ontario to Philadelphia from $100
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Philadelphia departing on 6/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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American Airlines flights from Ontario to Philadelphia
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Frontier flights from Ontario to Philadelphia
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How to get the cheapest flight ticket from Ontario to Philadelphia
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Philadelphia?
The cheapest month to fly to Philadelphia from Ontario is in August. Flight prices, which tend to average around $342, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Philadelphia, with average flight prices from Ontario averaging around $353.
What is the cheapest day to depart on your flight to Philadelphia?
The cheapest day to depart from Ontario to Philadelphia is on a Wednesday. Travelers who choose to depart for Philadelphia on a Wednesday will often find tickets for as low as $422. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $584.
What is the cheapest time of day to depart on your flight to Philadelphia?
According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from Ontario to Philadelphia in the evening for as low as $398. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the morning when prices are around $497.
How far in advance should I book a flight to Philadelphia?
You are more likely to see cheaper flights to Philadelphia from Ontario when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $409 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Ontario for as low as $332 on momondo.
What is the cheapest airline that flies from Ontario to Philadelphia?
Frontier, Delta, and Hawaiian Airlines are the most popular carriers operating from Ontario to Philadelphia
What airlines fly to Philadelphia?
American Airlines, United Airlines and Spirit Airlines are the top three most popular airlines that fly to Philadelphia from Ontario according to our data. American Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 10 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.
When to book flights from Ontario to Philadelphia
Cheap Ontario to Philadelphia (ONT to PHL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Philadelphia
How far is Ontario to Philadelphia by plane?
The distance between Ontario and Philadelphia is about 2355.5 mi. In terms of flight time, this usually takes a little over 6h 45m.
When did momondo last update prices for flights from Ontario Airport to Philadelphia Airport?
Prices for flights from Ontario Airport to Philadelphia Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Philadelphia Airport?
As of June 2025, there are 6 operators available to choose from for flights from Ontario Airport to Philadelphia Airport.
How old do you have to be to fly from Ontario Airport to Philadelphia Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Philadelphia Airport.
What documentation or ID do you need to fly to Philadelphia Airport?
The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ontario to Philadelphia?
momondo data reveals that the most frequently booked airline on the route from Ontario to Philadelphia is American Airlines, representing 52% of all bookings. The subsequent popular airlines are Frontier at 21%, Delta at 12%, and Southwest at 9%.
Best airlines flying from Ontario to Philadelphia
Compare and see reviews for airlines that fly from Ontario to Philadelphia with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $88 | Free Cancellation | Rating 6.3 8,061 reviews | |||
| PriceFrom $140 | Free Cancellation | Rating 5.9 3,296 reviews | |||
| PriceFrom $319 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $319 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $342 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $361 | Free Cancellation | Rating 8.0 4,278 reviews |
United Airlines Flights From Ontario to Philadelphia
United Airlines flight deals from Ontario to Philadelphia start from $342 round-trip. Over the 7 United Airlines flights for this route in a normal week, average airfare is usually $472 round-trip - but some users have found much cheaper deals with momondo.
Traveling to a place near Philadelphia?
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Why should I use momondo to find a flight deal from Ontario to Philadelphia?
It is quick and easy to find Ontario to Philadelphia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Philadelphia that suits you.
Can I find flights from Ontario to Philadelphia with flexible booking policies on momondo?
All flight searches from Ontario to Philadelphia on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Ontario to Philadelphia?
momondo provides multiple filters to help you find the best flight to Philadelphia from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Ontario to Philadelphia right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Ontario to Philadelphia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.