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Cheap flights from Ontario to Philadelphia from $99

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 5/16. 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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0 bags

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Find the cheapest flights from Ontario to Philadelphia

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Philadelphia.
10:53 am - 6:47 amONT-PHL
16h 54m1 stop
6:45 pm - 7:24 amPHL-ONT
15h 39m1 stop
$232Frontier
Find Deal
Mon, Apr 28 - Wed, Apr 30
2:28 pm - 6:52 amONT-PHL
13h 24m1 stop
6:42 pm - 11:59 pmPHL-ONT
8h 17m1 stop
$238Frontier
Find Deal
Sun, May 4 - Fri, May 9
10:00 am - 7:46 pmONT-PHL
6h 46m1 stop
1:26 pm - 5:32 pmPHL-ONT
7h 06m1 stop
$327American Airlines
Find Deal
Wed, May 14 - Sat, Aug 23
10:15 pm - 9:20 amONT-PHL
8h 05m1 stop
6:48 pm - 11:42 pmPHL-ONT
7h 54m1 stop
$345Delta
Find Deal
Sat, May 3 - Mon, May 12
1:14 pm - 11:54 pmONT-PHL
7h 40m1 stop
5:28 pm - 9:35 pmPHL-ONT
7h 07m1 stop
$347American Airlines
Find Deal
Sat, May 17 - Sat, Aug 23
7:05 pm - 11:00 amONT-PHL
12h 55m2 stops
7:05 am - 12:15 pmPHL-ONT
8h 10m1 stop
$350Delta
Find Deal
Wed, May 7 - Sat, May 10
9:35 pm - 9:25 amONT-PHL
8h 50m2 stops
5:35 pm - 11:10 pmPHL-ONT
8h 35m1 stop
$352Southwest
Find Deal
Wed, Jun 18 - Wed, Jun 25
9:35 pm - 9:15 amONT-PHL
8h 40m2 stops
4:45 pm - 10:40 pmPHL-ONT
8h 55m2 stops
$355Southwest
Find Deal
Tue, Jun 10 - Tue, Jun 24
5:05 am - 9:35 pmONT-PHL
13h 30m2 stops
6:30 am - 12:32 pmPHL-ONT
9h 02m2 stops
$357United Airlines
Find Deal
Fri, Jul 4 - Tue, Jul 15
5:45 am - 3:36 pmONT-PHL
6h 51m1 stop
6:30 am - 12:13 pmPHL-ONT
8h 43m1 stop
$375United Airlines
Find Deal
Wed, Sep 17 - Sun, Sep 21

Frontier flights from Ontario to Philadelphia

Our best Frontier deals on Ontario to Philadelphia flight tickets
Frontier
Apr 28
ONT10:53 amOntario
16h 54m
1 stop
PHL6:47 amPhiladelphia
Apr 30
PHL6:45 pmPhiladelphia
15h 39m
1 stop
ONT7:24 amOntario
Frontier
May 4
ONT2:28 pmOntario
13h 24m
1 stop
PHL6:52 amPhiladelphia
May 9
PHL6:42 pmPhiladelphia
8h 17m
1 stop
ONT11:59 pmOntario
Frontier
May 8
ONT12:16 pmOntario
26h 21m
1 stop
PHL5:37 pmPhiladelphia
May 11
PHL6:54 pmPhiladelphia
23h 45m
1 stop
ONT3:39 pmOntario

American Airlines flights from Ontario to Philadelphia

Our best American Airlines deals on Ontario to Philadelphia flight tickets
American Airlines
May 14
ONT10:00 amOntario
6h 46m
1 stop
PHL7:46 pmPhiladelphia
Aug 23
PHL1:26 pmPhiladelphia
7h 06m
1 stop
ONT5:32 pmOntario
American Airlines
May 17
ONT1:14 pmOntario
7h 40m
1 stop
PHL11:54 pmPhiladelphia
Aug 23
PHL5:28 pmPhiladelphia
7h 07m
1 stop
ONT9:35 pmOntario
American Airlines
Apr 26
ONT11:59 pmOntario
8h 56m
1 stop
PHL11:55 amPhiladelphia
May 3
PHL5:00 amPhiladelphia
9h 46m
1 stop
ONT11:46 amOntario

See travel insights to Philadelphia from

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 $317, 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 $336.

What is the cheapest day to depart on your flight to Philadelphia?

The cheapest day to depart from Ontario to Philadelphia is on a Tuesday. Travelers who choose to depart for Philadelphia on a Tuesday will often find tickets for as low as $432. 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 $594.

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 at noon. momondo users have found flights departing from Ontario to Philadelphia at noon for as low as $425. 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 $500.

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 6 weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $400 when searching 6 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 $345 on momondo.

How have Ontario to Philadelphia flight prices changed over time?

As of April 2025, prices for Ontario to Philadelphia flights are approximately 26% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Philadelphia

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Philadelphia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

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

Best Price Found

$99

Fastest flight time

6h 30m

Direct flights

None

Airports in Philadelphia

1 airport
The best one-way flight to Philadelphia from Ontario in the past 72 hours is $99. The best round-trip flight deal from Ontario to Philadelphia found on momondo in the last 72 hours is $232.
The fastest flight from Ontario to Philadelphia takes 6h 30m
There are no direct flights from Ontario to Philadelphia. Popular non-direct route for this connection is Ontario Airport - Philadelphia Airport.
There is 1 airport near Philadelphia: Philadelphia (PHL)

  • 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 30m.

  • 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?

  • 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?


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
Spirit AirlinesPriceFrom $110Free CancellationRating
6.3
7,885 reviews
Search Spirit Airlines flights
FrontierPriceFrom $125Free CancellationRating
6.0
3,276 reviews
Search Frontier flights
DeltaPriceFrom $279Free CancellationRating
8.0
7,898 reviews
Search Delta flights
American AirlinesPriceFrom $280Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $357Free CancellationRating
7.4
8,615 reviews
Search United Airlines flights
SouthwestPriceFrom $366Free CancellationRating
8.0
4,277 reviews
Search Southwest flights

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
Rehoboth Beach
Cape May
Ocean City
Wildwood Crest
Reading
King of Prussia
Newark
Dover
North Wildwood
Cherry Hill
Dewey Beach
Lewes
Exton
Vineland
Essington
Pottstown
New Castle
Avalon
West Chester

Why use momondo?

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.


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