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Cheap flights from Ontario to Philadelphia from $84

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 5/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Philadelphia.
Frontier Logo
1:15 pm - 6:52 amONT-PHL
14h 37m1 stop
Frontier Logo
6:54 pm - 7:24 amPHL-ONT
15h 30m1 stop
$179Frontier
Find Deal
Sat, May 3 - Sat, May 17
Frontier Logo
1:08 pm - 6:52 amONT-PHL
14h 44m1 stop
Frontier Logo
12:20 pm - 11:15 amPHL-ONT
25h 55m1 stop
$181Frontier
Find Deal
Wed, May 7 - Sat, May 10
American Airlines Logo
12:41 pm - 12:46 amONT-PHL
9h 05m2 stops
American Airlines Logo
3:38 pm - 9:05 pmPHL-ONT
8h 27m1 stop
$312American Airlines
Find Deal
Sat, May 24 - Tue, May 27
Delta Logo
7:05 am - 5:18 pmONT-PHL
7h 13m1 stop
Delta Logo
6:45 pm - 11:21 pmPHL-ONT
7h 36m1 stop
$325Delta
Find Deal
Tue, Jun 10 - Sat, Jun 21
American Airlines Logo
7:05 pm - 5:50 amONT-PHL
7h 45m1 stop
American Airlines Logo
5:25 pm - 9:38 pmPHL-ONT
7h 13m1 stop
$327American Airlines
Find Deal
Wed, Jul 2 - Tue, Jul 8
Delta Logo
9:44 am - 12:24 amONT-PHL
11h 40m2 stops
Delta Logo
6:45 pm - 11:21 pmPHL-ONT
7h 36m1 stop
$330Delta
Find Deal
Tue, Jun 10 - Sat, Jun 21
Southwest Logo
5:20 am - 5:55 pmONT-PHL
9h 35m2 stops
Southwest Logo
10:30 am - 4:45 pmPHL-ONT
9h 15m2 stops
$371Southwest
Find Deal
Mon, Sep 8 - Tue, Sep 16
United Airlines Logo
6:41 pm - 9:39 amONT-PHL
11h 58m2 stops
United Airlines Logo
5:11 pm - 10:11 pmPHL-ONT
8h 00m1 stop
$398United Airlines
Find Deal
Wed, Jun 18 - Sat, Jun 28
Southwest Logo
10:45 am - 11:30 pmONT-PHL
9h 45m2 stops
Southwest Logo
5:10 pm - 11:10 pmPHL-ONT
9h 00m2 stops
$399Southwest
Find Deal
Thu, Jun 5 - Mon, Jun 9
United Airlines Logo
6:38 pm - 5:37 amONT-PHL
7h 59m1 stop
United Airlines Logo
8:15 am - 5:25 pmPHL-ONT
12h 10m2 stops
$432United Airlines
Find Deal
Wed, Jul 2 - Tue, Jul 8

Frontier flights from Ontario to Philadelphia

Our best Frontier deals on Ontario to Philadelphia flight tickets
Frontier
May 3
ONT1:15 pmOntario
14h 37m
1 stop
PHL6:52 amPhiladelphia
May 17
PHL6:54 pmPhiladelphia
15h 30m
1 stop
ONT7:24 amOntario
Frontier
Apr 30
ONT10:44 amOntario
17h 03m
1 stop
PHL6:47 amPhiladelphia
May 3
PHL6:54 pmPhiladelphia
15h 30m
1 stop
ONT7:24 amOntario
Frontier
May 7
ONT1:08 pmOntario
14h 44m
1 stop
PHL6:52 amPhiladelphia
May 10
PHL12:20 pmPhiladelphia
25h 55m
1 stop
ONT11:15 amOntario

Alaska Airlines flights from Ontario to Philadelphia

Our best Alaska Airlines deals on Ontario to Philadelphia flight tickets
Alaska Airlines
May 6
ONT4:29 pmOntario
10h 15m
1 stop
PHL5:44 amPhiladelphia
May 13
PHL7:04 amPhiladelphia
11h 28m
1 stop
ONT3:32 pmOntario
Alaska Airlines
Sep 8
ONT11:39 amOntario
15h 06m
1 stop
PHL5:45 amPhiladelphia
Sep 16
PHL6:58 pmPhiladelphia
18h 47m
1 stop
ONT10:45 amOntario
Alaska Airlines
May 6
ONT4:29 pmOntario
10h 15m
1 stop
PHL5:44 amPhiladelphia
May 13
PHL7:04 amPhiladelphia
19h 54m
2 stops
ONT11:58 pmOntario

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 $423. 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 $351 on momondo.

How have Ontario to Philadelphia flight prices changed over time?

As of April 2025, prices for Ontario to Philadelphia flights are approximately 10% 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

$84

Fastest flight time

7h 00m

Direct flights

None

Airports in Philadelphia

1 airport
The best one-way flight to Philadelphia from Ontario in the past 72 hours is $84. The best round-trip flight deal from Ontario to Philadelphia found on momondo in the last 72 hours is $179.
The fastest flight from Ontario to Philadelphia takes 7h 00m
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 7h 00m.

  • 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
7,940 reviews
Search Spirit Airlines flights
FrontierPriceFrom $148Free CancellationRating
5.9
3,283 reviews
Search Frontier flights
DeltaPriceFrom $279Free CancellationRating
8.0
7,920 reviews
Search Delta flights
American AirlinesPriceFrom $287Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $357Free CancellationRating
7.4
8,684 reviews
Search United Airlines flights
SouthwestPriceFrom $366Free CancellationRating
8.0
4,287 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
Cherry Hill
North Wildwood
Dewey Beach
Lewes
Exton
Vineland
Essington
New Castle
Pottstown
Avalon
Stone Harbor

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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