PHL - ONT

$106 Find Cheap Flights from Philadelphia to Ontario - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$219
Typical prices: $356-$505
Frontier
Sat 11/3Sat 11/10
PHL - ONT • 2 stops
Cheapest one-way
$106
Typical prices: $156-$319
Frontier
Sat 11/3
PHL - ONT • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Philadelphia and Ontario. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
17 weeks
in advance
Our data shows that travelers who book at least 17 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
When to travel
January
Cheapest • 22% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Las Vegas Harry Reid Intl (LAS)
Cheapest • Avg $323 (round-trip)
Phoenix Sky Harbor Intl (PHX)
Shortest trip • 7h 35m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Philadelphia to Ontario (PHL-ONT)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Ontario

Tue, Nov 3 - Tue, Nov 10
Frontier Logo
12:36 pm - 11:51 pmPHL  Philadelphia-ONT Ontario
14h 15m2 stops Atlanta Hartsfield-Jackson Denver Intl
Frontier Logo
6:25 am - 7:21 amONT  Ontario-PHL Philadelphia
21h 56m2 stops Denver Intl Atlanta Hartsfield-Jackson
$219Frontier
Sat, Oct 24 - Mon, Oct 26
Frontier Logo
6:00 am - 4:48 pmPHL  Philadelphia-ONT Ontario
13h 48m1 stop Dallas/Fort Worth
Frontier Logo
8:35 pm - 7:18 amONT  Ontario-PHL Philadelphia
7h 43m1 stop Las Vegas Harry Reid Intl
$238Frontier
Sat, Oct 31 - Sat, Nov 7
Multiple Airlines Logo
6:00 am - 4:38 pmPHL  Philadelphia-ONT Ontario
13h 38m1 stop Dallas/Fort Worth
Multiple Airlines Logo
4:09 pm - 5:32 amONT  Ontario-PHL Philadelphia
10h 23m1 stop Seattle/Tacoma Intl
$293Multiple Airlines
Sat, Oct 31 - Sat, Nov 7
Multiple Airlines Logo
6:00 am - 4:38 pmPHL  Philadelphia-ONT Ontario
13h 38m1 stop Dallas/Fort Worth
Multiple Airlines Logo
4:09 pm - 5:32 amONT  Ontario-PHL Philadelphia
10h 23m1 stop Seattle/Tacoma Intl
$293Multiple Airlines
Sat, Oct 24 - Sat, Oct 31
Delta Logo
2:10 pm - 7:30 pmPHL  Philadelphia-ONT Ontario
8h 20m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:16 pm - 12:56 amONT  Ontario-PHL Philadelphia
9h 40m1 stop Atlanta Hartsfield-Jackson
$336Delta
Thu, Dec 31 - Tue, Feb 2
American Airlines Logo
6:00 am - 12:40 pmPHL  Philadelphia-ONT Ontario
9h 40m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
5:44 am - 5:52 pmONT  Ontario-PHL Philadelphia
9h 08m1 stop Dallas/Fort Worth
$337American Airlines
Thu, Jan 28 - Mon, Feb 1
American Airlines Logo
12:34 pm - 6:51 pmPHL  Philadelphia-ONT Ontario
9h 17m1 stop Dallas/Fort Worth
American Airlines Logo
1:24 pm - 10:59 pmONT  Ontario-PHL Philadelphia
6h 35m1 stop Phoenix Sky Harbor Intl
$337American Airlines
Sat, Jan 16 - Wed, Jan 20
Delta Logo
5:30 am - 11:27 amPHL  Philadelphia-ONT Ontario
8h 57m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:00 am - 5:15 pmONT  Ontario-PHL Philadelphia
7h 15m1 stop Atlanta Hartsfield-Jackson
$337Delta
Thu, Oct 29 - Mon, Nov 2
Southwest Logo
5:10 pm - 11:55 pmPHL  Philadelphia-ONT Ontario
9h 45m2 stops Dallas Love Field Las Vegas Harry Reid Intl
Southwest Logo
11:55 pm - 11:05 amONT  Ontario-PHL Philadelphia
8h 10m1 stop Chicago Midway
$342Southwest
Sat, Nov 14 - Mon, Nov 16
Southwest Logo
5:20 am - 12:25 pmPHL  Philadelphia-ONT Ontario
10h 05m2 stops Denver Intl Oakland
Southwest Logo
11:25 am - 10:10 pmONT  Ontario-PHL Philadelphia
7h 45m1 stop Nashville Intl
$349Southwest
Booking Insights

Price, demand and travel trends for Philadelphia to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Philadelphia to Ontario?

Round-trip flights from Philadelphia to Ontario typically range from $356 to $505. The lowest price found in the past 5 days was $219, on Frontier.

What's the cheapest day of the week to fly from Philadelphia to Ontario?

Based on deals KAYAK users found in the last 12 months, Saturday is the cheapest day of the week to fly from Philadelphia to Ontario. It’s 10% cheaper than the average day, while Sunday is the most expensive, with prices 24% higher.

What’s the cheapest month to fly from Philadelphia to Ontario?

•January is the cheapest month to fly from Philadelphia to Ontario at $322 round-trip.
•March ($483) and December ($478) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 50% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Philadelphia to Ontario the cheapest?

Flights from Philadelphia to Ontario are cheapest 17 weeks before departure. Booking in this window typically costs about 31% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Philadelphia to Ontario flights

Low season

February

Cheapest flight

$106
Beat the crowds with an average 36% drop in travelers.
The most popular month to fly with an average 84% increase in travelers.
One-way flight from Philadelphia to Ontario

When to book flights from Philadelphia to Ontario

Are your dates flexible? Find out the best times to travel from Philadelphia to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Philadelphia to Ontario flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Philadelphia to Ontario?

    Two cabin classes are available on flights from Philadelphia to Ontario:

    • Economy Class
    • First Class

  • How long is a flight from Philadelphia to Ontario?

    A nonstop flight from Philadelphia to Ontario takes 00m, covering 2,349 miles.

  • Do I need a passport to fly from Philadelphia to Ontario?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Philadelphia to Ontario flight?

    Round-trip flights from Philadelphia to Ontario range from $356 to $505, with an average of $415 over the past 12 months. Anything below $356 counts as a good deal.

  • How expensive are last-minute Philadelphia to Ontario flights?

    Last-minute fares on this route (booked within two weeks of departure) run 16% above the $415 route average. Book 17 weeks before departure for the lowest fares.

  • How are flight prices from Philadelphia to Ontario looking right now?

    One-way fares from Philadelphia to Ontario are currently lower than usual. Average one-way flight prices are about $160, which is 26% below the typical average for this route.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:

    • Fox
    • Thrifty
    • Europcar
    • Dollar
    • Alamo

  • Which airports can I use when flying from Philadelphia to Ontario?

    Flights from Philadelphia to Ontario usually depart from Philadelphia (PHL) and arrive at Ontario (ONT).

  • Which airports do connecting flights from Philadelphia to Ontario pass through?

    One-stop flights from Philadelphia to Ontario most commonly connect through:

    • Phoenix Sky Harbor Intl (PHX) - 40% of one-stop connections
    • Dallas/Fort Worth (DFW) - 22% of one-stop connections
    • Denver Intl (DEN) - 19% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 7% of one-stop connections

  • Can I save money by using flexible dates for flights from Philadelphia to Ontario?

    Yes. Flexible dates can save you up to 28% on flights from Philadelphia to Ontario. Saturday is the cheapest departure day at $374 round-trip on average, while Sunday is the most expensive at $516, a difference of $142.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • How much time can I save by choosing a different layover airport from Philadelphia to Ontario?

    Flying via Phoenix Sky Harbor Intl (PHX) gives the shortest average 1-stop total travel time at 7h 35m, compared with 7h 36m via Chicago Midway (MDW) and 7h 51m via Atlanta Hartsfield-Jackson (ATL).

  • What is the time difference between Philadelphia and Ontario?

    Ontario is 3 hours behind Philadelphia (Pacific Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

Your guide to booking Philadelphia to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Saturday departure and avoid flying on Sunday. On this route, Saturday flights average $374, about $142 less than Sunday fares (28% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 17 weeks before you fly. On this route, that window historically saves about 31% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Philadelphia to Ontario trip for January. Fares historically average $322 round-trip in that month - typically $161 less than the most expensive month, which is March (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.

    • Azure Hotel & Suites, Trademark Collection by Wyndham
    • La Quinta Inn & Suites by Wyndham Ontario Airport
    • Ontario Airport Inn

More options for your flight from Philadelphia to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario