$123 Flight Deals from Philadelphia to Ontario International Airport

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Stops

Up to 1 stop

$314

Up to 2 stops

$406

Airlines

Alaska Airlines

$564

American Airlines

$398

Delta Air Lines

$314

Frontier Airlines

$367

Hawaiian Airlines

$587

United Airlines

$462

Cabin Class

Economy

$314

Departure Airports

Philadelphia International Airport

$314

Arrival Airports

Ontario International Airport

$314

Layover Airports

Charlotte Douglas International Airport

$446

Chicago O Hare Airport

$476

Dallas Fort Worth International Airport

$398

Denver International Airport

$367

Detroit Metropolitan Airport

$332

George Bush Intercontinental Houston Airport

$548

Hartsfield Jackson Atlanta International Airport

$351

Minneapolis-St Paul International/Wold-Chamberlain Airport

$314

Phoenix Sky Harbor International Airport

$442

Salt Lake City International Airport

$314

San Francisco International Airport

$487

Seattle Tacoma International Airport

$564

Best Price. GUARANTEED.

Exclusively for Priceline Members
Tired of searching? Book now!
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On average save $240 per traveler

Delta Air Lines

05/29/25

7:05am

PHL

5h 10m

SLC

05/29/25

12:15pm

ONT

Delta Air Lines

06/04/25

6:15am

ONT

11h 48m

MSP

06/04/25

6:03pm

PHL

^$314

Free cancellation within 83 hours of booking

Delta Air Lines

05/30/25

7:05am

PHL

5h 10m

SLC

05/30/25

12:15pm

ONT

Delta Air Lines

06/03/25

11:40pm

ONT

11h 20m

MSP

06/04/25

11:00am

PHL

^$316

Free cancellation within 83 hours of booking

Delta Air Lines

06/06/25

6:48pm

PHL

4h 54m

SLC

06/06/25

11:42pm

ONT

Delta Air Lines

06/11/25

5:30am

ONT

10h 25m

DTW

06/11/25

3:55pm

PHL

^$332

Free cancellation within 83 hours of booking

Delta Air Lines

06/26/25

6:45pm

PHL

4h 59m

SLC

06/26/25

11:44pm

ONT

Delta Air Lines

06/28/25

1:15pm

ONT

11h 38m

ATL

06/29/25

12:53am

PHL

^$351

Free cancellation within 83 hours of booking

Frontier Airlines

05/27/25

6:15am

PHL

4h 30m

DEN

05/27/25

10:45am

ONT

Frontier Airlines

06/03/25

6:42pm

ONT

10h 28m

DEN

06/04/25

5:10am

PHL

^$367

Free cancellation within 83 hours of booking

Delta Air Lines

06/13/25

5:20pm

PHL

5h 6m

ATL

06/13/25

10:26pm

ONT

Delta Air Lines

06/18/25

1:15pm

ONT

11h 42m

ATL

06/19/25

12:57am

PHL

^$372

Free cancellation within 83 hours of booking

Delta Air Lines

06/20/25

5:20pm

PHL

5h 6m

ATL

06/20/25

10:26pm

ONT

Delta Air Lines

06/24/25

6:15am

ONT

11h 49m

MSP

06/24/25

6:04pm

PHL

^$386

Free cancellation within 83 hours of booking

American Airlines

06/04/25

6:39am

PHL

5h 11m

DFW

06/04/25

11:50am

ONT

American Airlines

06/07/25

6:45am

ONT

8h 9m

Direct

06/07/25

2:54pm

PHL

^$398

Free cancellation within 83 hours of booking

Delta Air Lines

06/19/25

6:00am

PHL

6h 18m

DTW

SLC

06/19/25

12:18pm

ONT

Delta Air Lines

07/02/25

1:15pm

ONT

11h 42m

ATL

07/03/25

12:57am

PHL

^$406

Free cancellation within 83 hours of booking

American Airlines

06/21/25

8:45am

PHL

5h 5m

DFW

06/21/25

1:50pm

ONT

American Airlines

06/24/25

2:42pm

ONT

8h 12m

Direct

06/24/25

10:54pm

PHL

^$416

Free cancellation within 83 hours of booking

American Airlines

06/11/25

5:00am

PHL

5h 4m

DFW

06/11/25

10:04am

ONT

American Airlines

06/11/25

12:29pm

ONT

10h 16m

DFW

06/11/25

10:45pm

PHL

^$424

Free cancellation within 83 hours of booking

American Airlines

06/25/25

10:44am

PHL

5h 29m

PHX

06/25/25

4:13pm

ONT

American Airlines

07/02/25

7:05pm

ONT

10h 45m

PHX

07/03/25

5:50am

PHL

^$442

Free cancellation within 83 hours of booking

American Airlines

06/07/25

5:21pm

PHL

4h 17m

PHX

06/07/25

9:38pm

ONT

American Airlines

06/09/25

7:02pm

ONT

10h 48m

PHX

06/10/25

5:50am

PHL

^$444

Free cancellation within 83 hours of booking

American Airlines

06/14/25

1:40pm

PHL

7h 33m

CLT

06/14/25

9:13pm

ONT

American Airlines

06/21/25

7:05pm

ONT

12h 13m

PHX

06/22/25

7:18am

PHL

^$446

Free cancellation within 83 hours of booking

United Airlines

05/30/25

10:10am

PHL

7h 15m

DEN

05/30/25

5:25pm

ONT

United Airlines

06/06/25

6:32pm

ONT

10h 50m

DEN

06/07/25

5:22am

PHL

^$462

Free cancellation within 83 hours of booking

United Airlines

06/16/25

4:56pm

PHL

5h 30m

ORD

06/16/25

10:26pm

ONT

United Airlines

06/21/25

6:41pm

ONT

12h 42m

Direct

06/22/25

7:23am

PHL

^$476

Free cancellation within 83 hours of booking

Delta Air Lines

06/19/25

6:00am

PHL

6h 18m

DTW

SLC

06/19/25

12:18pm

ONT

Delta Air Lines

07/02/25

7:01am

ONT

15h 29m

SLC

ATL

07/02/25

10:30pm

PHL

^$487

Free cancellation within 83 hours of booking

United Airlines

05/27/25

6:30am

PHL

5h 44m

SFO

05/27/25

12:14pm

ONT

United Airlines

06/03/25

6:41pm

ONT

11h 16m

Direct

06/04/25

5:57am

PHL

^$487

Free cancellation within 83 hours of booking

American Airlines

05/27/25

1:44pm

PHL

7h 21m

CLT

05/27/25

9:05pm

ONT

American Airlines

06/03/25

10:51am

ONT

10h 33m

DFW

06/03/25

9:24pm

PHL

^$489

Free cancellation within 83 hours of booking

United Airlines

06/14/25

4:56pm

PHL

5h 30m

ORD

06/14/25

10:26pm

ONT

United Airlines

06/21/25

6:41pm

ONT

12h 42m

Direct

06/22/25

7:23am

PHL

^$491

Free cancellation within 83 hours of booking

Delta Air Lines

06/16/25

5:20pm

PHL

5h 6m

ATL

06/16/25

10:26pm

ONT

Delta Air Lines

06/26/25

9:40am

ONT

12h 50m

SLC

ATL

06/26/25

10:30pm

PHL

^$491

Free cancellation within 83 hours of booking

United Airlines

06/08/25

6:30am

PHL

5h 44m

SFO

06/08/25

12:14pm

ONT

United Airlines

06/12/25

6:41pm

ONT

11h 16m

Direct

06/13/25

5:57am

PHL

^$499

Free cancellation within 83 hours of booking

United Airlines

06/08/25

6:30am

PHL

5h 44m

SFO

06/08/25

12:14pm

ONT

United Airlines

06/12/25

6:38pm

ONT

10h 44m

DEN

06/13/25

5:22am

PHL

^$504

Free cancellation within 83 hours of booking

United Airlines

06/25/25

12:58pm

PHL

8h 12m

IAH

06/25/25

9:10pm

ONT

United Airlines

07/02/25

6:38pm

ONT

10h 59m

DEN

07/03/25

5:37am

PHL

^$548

Free cancellation within 83 hours of booking

Alaska Airlines

05/28/25

7:00am

PHL

8h 50m

SEA

05/28/25

3:50pm

ONT

Alaska Airlines

06/04/25

3:02pm

ONT

14h 38m

SEA

06/05/25

5:40am

PHL

^$564

Free cancellation within 83 hours of booking

Alaska Airlines

05/31/25

7:00am

PHL

8h 50m

SEA

05/31/25

3:50pm

ONT

Alaska Airlines

06/04/25

3:02pm

ONT

14h 38m

SEA

06/05/25

5:40am

PHL

^$586

Free cancellation within 83 hours of booking

Hawaiian Airlines

06/10/25

6:59pm

PHL

15h 58m

SEA

06/11/25

10:57am

ONT

Hawaiian Airlines

06/24/25

3:02pm

ONT

14h 23m

SEA

06/25/25

5:25am

PHL

^$587

Free cancellation within 83 hours of booking

Alaska Airlines

05/27/25

7:00am

PHL

8h 50m

SEA

05/27/25

3:50pm

ONT

Alaska Airlines

06/03/25

4:45pm

ONT

12h 55m

SEA

06/04/25

5:40am

PHL

^$589

Free cancellation within 83 hours of booking

Hawaiian Airlines

05/27/25

7:00am

PHL

8h 50m

SEA

05/27/25

3:50pm

ONT

Hawaiian Airlines

06/03/25

4:45pm

ONT

12h 55m

SEA

06/04/25

5:40am

PHL

^$617

Free cancellation within 83 hours of booking

Hawaiian Airlines

06/07/25

6:59pm

PHL

15h 58m

SEA

06/08/25

10:57am

ONT

Hawaiian Airlines

06/09/25

3:02pm

ONT

14h 38m

SEA

06/10/25

5:40am

PHL

^$676

Free cancellation within 83 hours of booking

Top Deals on flights from Philadelphia to Ontario International Airport

Philadelphia, US (PHL) - Los Angeles, US (LAX)

Frontier Airlines

May 16

6:42pm

PHL

5h 17m

DEN

May 16

11:59pm

ONT

as low as

$123

Philadelphia, US (PHL) - Los Angeles, US (LAX)

Frontier Airlines

May 1

6:54pm

PHL

12h 30m

LAS

May 2

7:24am

ONT

as low as

$124

Philadelphia, US (PHL) - Los Angeles, US (LAX)

Delta Air Lines

Apr 24

5:20am

PHL

5h 37m

ATL

Apr 24

10:57am

ONT

as low as

$171

Philadelphia, US (PHL) - Los Angeles, US (LAX)

Delta Air Lines

Apr 28

6:34pm

PHL

5h 7m

SLC

Apr 28

11:41pm

ONT

as low as

$171

Philadelphia, US (PHL) - Los Angeles, US (LAX)

Delta Air Lines

May 1

6:00am

PHL

6h 16m

MSP

SLC

May 1

12:16pm

ONT

as low as

$176

Philadelphia, US (PHL) - Los Angeles, US (LAX)

Delta Air Lines

May 17

9:55am

PHL

6h 22m

DTW

SLC

May 17

4:17pm

ONT

as low as

$178

Philadelphia, US (PHL) - Los Angeles, US (LAX)

Alaska Airlines

Apr 26

7:04am

PHL

8h 28m

SEA

Apr 26

3:32pm

ONT

as low as

$199

Philadelphia, US (PHL) - Los Angeles, US (LAX)

American Airlines

May 6

7:20am

PHL

4h 30m

PHX

May 6

11:50am

ONT

as low as

$203

Philadelphia, US (PHL) - Los Angeles, US (LAX)

American Airlines

May 14

1:44pm

PHL

7h 21m

CLT

May 14

9:05pm

ONT

as low as

$203

Philadelphia, US (PHL) - Los Angeles, US (LAX)

American Airlines

Apr 30

8:40am

PHL

5h 9m

DFW

Apr 30

1:49pm

ONT

as low as

$203

Philadelphia, US (PHL) - Los Angeles, US (LAX)

Hawaiian Airlines

Apr 24

7:04am

PHL

8h 28m

SEA

Apr 24

3:32pm

ONT

as low as

$213

Philadelphia, US (PHL) - Los Angeles, US (LAX)

United Airlines

May 8

9:45am

PHL

5h 24m

DEN

May 8

3:09pm

ONT

as low as

$221

Flights to Los Angeles

Return flights

Flights From Ontario International Airport To Philadelphia

Browse origins

Flights
North America
United States
Pennsylvania
Philadelphia

Browse destinations

Flights
North America
United States
California
Los Angeles
Ontario International Airport

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Flight Deals from Philadelphia to Ontario International Airport from $123

Stops

Airlines

Cabin Class

Departure Airports

Arrival Airports

Layover Airports

Best Price. GUARANTEED.

Top Deals on flights from Philadelphia to Ontario International Airport

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