$129 Flight Deals from Ontario International Airport to Philadelphia

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Save an average of $240 per person when bundling your flight and hotel together with Priceline

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Stops

Nonstop

from $457

Up to 1 stop

$307

Up to 2 stops

$572

Airlines

Alaska Airlines

$566

American Airlines

$412

Delta Air Lines

$323

Frontier Airlines

$307

United Airlines

$405

Cabin Class

Economy

$307

Departure Airports

Ontario International Airport

$307

Arrival Airports

Philadelphia International Airport

$307

Layover Airports

Charlotte Douglas International Airport

$446

Chicago O Hare Airport

$431

Dallas Fort Worth International Airport

$412

Denver International Airport

$307

Detroit Metropolitan Airport

$363

General Edward Lawrence Logan International Airport

$567

George Bush Intercontinental Houston Airport

$483

Hartsfield Jackson Atlanta International Airport

$323

Minneapolis-St Paul International/Wold-Chamberlain Airport

$363

Phoenix Sky Harbor International Airport

$426

Reagan Washington National Airport

$572

Salt Lake City International Airport

$323

San Francisco International Airport

$415

Seattle Tacoma International Airport

$566

Washington Dulles Airport

$405

Best Price. GUARANTEED.

Exclusively for Priceline Members
Tired of searching? Book now!
We'll refund the difference if you find a lower price.

BUNDLE & SAVE

Book a flight & hotel together for extra savings.

On average save $240 per traveler

Frontier Airlines

05/30/25

5:21pm

ONT

11h 46m

DEN

05/31/25

5:07am

PHL

Frontier Airlines

06/03/25

6:15am

PHL

4h 28m

DEN

06/03/25

10:43am

ONT

^$307

Free cancellation within 83 hours of booking

Delta Air Lines

05/16/25

4:57pm

ONT

12h 53m

SLC

05/17/25

5:50am

PHL

Delta Air Lines

05/24/25

4:58pm

PHL

7h 35m

ATL

05/25/25

12:33am

ONT

^$323

Free cancellation within 83 hours of booking

Delta Air Lines

05/23/25

4:57pm

ONT

12h 53m

SLC

05/24/25

5:50am

PHL

Delta Air Lines

05/31/25

4:58pm

PHL

7h 47m

ATL

06/01/25

12:45am

ONT

^$342

Free cancellation within 83 hours of booking

Delta Air Lines

05/30/25

12:18pm

ONT

12h 39m

ATL

05/31/25

12:57am

PHL

Delta Air Lines

06/06/25

4:57pm

PHL

5h 18m

ATL

06/06/25

10:15pm

ONT

^$353

Free cancellation within 83 hours of booking

Delta Air Lines

05/21/25

6:00am

ONT

11h 38m

SLC

05/21/25

5:38pm

PHL

Delta Air Lines

05/28/25

10:04am

PHL

4h 38m

DTW

05/28/25

2:42pm

ONT

^$363

Free cancellation within 83 hours of booking

Delta Air Lines

05/15/25

4:57pm

ONT

12h 53m

SLC

05/16/25

5:50am

PHL

Delta Air Lines

05/20/25

6:00am

PHL

6h 58m

MSP

05/20/25

12:58pm

ONT

^$363

Free cancellation within 83 hours of booking

Delta Air Lines

05/25/25

6:00am

ONT

11h 38m

SLC

05/25/25

5:38pm

PHL

Delta Air Lines

06/08/25

6:00am

PHL

4h 41m

DTW

06/08/25

10:41am

ONT

^$382

Free cancellation within 83 hours of booking

United Airlines

05/29/25

6:41pm

ONT

11h 16m

Direct

05/30/25

5:57am

PHL

United Airlines

06/04/25

7:59pm

PHL

4h 35m

IAD

06/05/25

12:34am

ONT

^$405

Free cancellation within 83 hours of booking

American Airlines

06/05/25

2:40pm

ONT

10h 19m

DFW

06/06/25

12:59am

PHL

American Airlines

06/07/25

9:10pm

PHL

2h 49m

Direct

06/07/25

11:59pm

ONT

^$412

Free cancellation within 83 hours of booking

United Airlines

05/22/25

6:32pm

ONT

10h 50m

DEN

05/23/25

5:22am

PHL

United Airlines

05/25/25

6:30am

PHL

5h 43m

SFO

05/25/25

12:13pm

ONT

^$415

Free cancellation within 83 hours of booking

American Airlines

05/17/25

1:14pm

ONT

10h 40m

PHX

05/17/25

11:54pm

PHL

American Airlines

05/20/25

1:45pm

PHL

4h 38m

PHX

05/20/25

6:23pm

ONT

^$426

Free cancellation within 83 hours of booking

United Airlines

05/22/25

6:41pm

ONT

11h 39m

Direct

05/23/25

6:20am

PHL

United Airlines

05/31/25

4:56pm

PHL

5h 14m

ORD

05/31/25

10:10pm

ONT

^$431

Free cancellation within 83 hours of booking

United Airlines

06/03/25

6:41pm

ONT

11h 16m

Direct

06/04/25

5:57am

PHL

United Airlines

06/04/25

12:25pm

PHL

5h 41m

ORD

06/04/25

6:06pm

ONT

^$431

Free cancellation within 83 hours of booking

United Airlines

06/04/25

6:41pm

ONT

11h 16m

Direct

06/05/25

5:57am

PHL

United Airlines

06/11/25

6:25am

PHL

5h 20m

ORD

06/11/25

11:45am

ONT

^$439

Free cancellation within 83 hours of booking

United Airlines

05/29/25

6:32pm

ONT

10h 50m

DEN

05/30/25

5:22am

PHL

United Airlines

06/05/25

6:30am

PHL

5h 44m

SFO

06/05/25

12:14pm

ONT

^$442

Free cancellation within 83 hours of booking

American Airlines

06/03/25

1:14pm

ONT

10h 40m

PHX

06/03/25

11:54pm

PHL

American Airlines

06/04/25

1:45pm

PHL

4h 38m

PHX

06/04/25

6:23pm

ONT

^$442

Free cancellation within 83 hours of booking

American Airlines

05/24/25

10:40pm

ONT

11h 8m

CLT

05/25/25

9:48am

PHL

American Airlines

05/31/25

10:55am

PHL

7h 28m

PHX

05/31/25

6:23pm

ONT

^$446

Free cancellation within 83 hours of booking

American Airlines

05/31/25

7:25pm

ONT

10h 46m

PHX

06/01/25

6:11am

PHL

American Airlines

06/07/25

1:24pm

PHL

5h 37m

DFW

06/07/25

7:01pm

ONT

^$446

Free cancellation within 83 hours of booking

United Airlines

05/29/25

6:41pm

ONT

11h 16m

Direct

05/30/25

5:57am

PHL

United Airlines

06/04/25

10:10am

PHL

4h 48m

Direct

06/04/25

2:58pm

ONT

^$457

Free cancellation within 83 hours of booking

American Airlines

06/05/25

12:49pm

ONT

12h 10m

DFW

06/06/25

12:59am

PHL

American Airlines

06/12/25

5:00am

PHL

5h 4m

DFW

06/12/25

10:04am

ONT

^$460

Free cancellation within 83 hours of booking

United Airlines

06/11/25

6:41pm

ONT

11h 16m

Direct

06/12/25

5:57am

PHL

United Airlines

06/17/25

6:20am

PHL

5h 1m

IAH

06/17/25

11:21am

ONT

^$483

Free cancellation within 83 hours of booking

United Airlines

06/03/25

6:41pm

ONT

11h 16m

Direct

06/04/25

5:57am

PHL

United Airlines

06/06/25

10:10am

PHL

4h 48m

Direct

06/06/25

2:58pm

ONT

^$487

Free cancellation within 83 hours of booking

American Airlines

05/29/25

10:40pm

ONT

10h 17m

CLT

05/30/25

8:57am

PHL

American Airlines

06/05/25

6:45am

PHL

7h 5m

DFW

06/05/25

1:50pm

ONT

^$489

Free cancellation within 83 hours of booking

American Airlines

05/20/25

10:40pm

ONT

12h 56m

CLT

05/21/25

11:36am

PHL

American Airlines

05/27/25

5:45pm

PHL

4h 12m

PHX

05/27/25

9:57pm

ONT

^$489

Free cancellation within 83 hours of booking

United Airlines

05/24/25

6:00am

ONT

10h 57m

SFO

05/24/25

4:57pm

PHL

United Airlines

05/31/25

4:56pm

PHL

5h 30m

ORD

05/31/25

10:26pm

ONT

^$496

Free cancellation within 83 hours of booking

United Airlines

06/11/25

6:41pm

ONT

11h 16m

Direct

06/12/25

5:57am

PHL

United Airlines

06/14/25

10:10am

PHL

4h 48m

Direct

06/14/25

2:58pm

ONT

^$505

Free cancellation within 83 hours of booking

United Airlines

05/20/25

6:08am

ONT

10h 53m

IAH

05/20/25

5:01pm

PHL

United Airlines

05/27/25

6:30am

PHL

5h 44m

SFO

05/27/25

12:14pm

ONT

^$542

Free cancellation within 83 hours of booking

Alaska Airlines

05/17/25

4:45pm

ONT

12h 55m

SEA

05/18/25

5:40am

PHL

Alaska Airlines

05/28/25

7:00am

PHL

7h 12m

SEA

05/28/25

2:12pm

ONT

^$566

Free cancellation within 83 hours of booking

American Airlines

05/26/25

10:40pm

ONT

10h 17m

CLT

05/27/25

8:57am

PHL

American Airlines

05/28/25

7:00am

PHL

8h 29m

BOS

05/28/25

3:29pm

ONT

^$567

Free cancellation within 83 hours of booking

Alaska Airlines

05/17/25

4:45pm

ONT

12h 55m

SEA

05/18/25

5:40am

PHL

Alaska Airlines

05/28/25

6:00am

PHL

9h 50m

DCA

SEA

05/28/25

3:50pm

ONT

^$572

Free cancellation within 83 hours of booking

Top Deals on flights from Ontario International Airport to Philadelphia

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

Frontier Airlines

May 2

12:59am

ONT

16h 38m

DEN

May 2

5:37pm

PHL

as low as

$129

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

Delta Air Lines

May 5

10:15pm

ONT

11h 5m

ATL

May 6

9:20am

PHL

as low as

$171

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

Alaska Airlines

May 5

4:29pm

ONT

13h 15m

SEA

May 6

5:44am

PHL

as low as

$171

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

Delta Air Lines

May 1

5:15pm

ONT

12h 35m

SLC

May 2

5:50am

PHL

as low as

$171

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

Delta Air Lines

May 1

10:15pm

ONT

19h 45m

ATL

MSP

May 2

6:00pm

PHL

as low as

$176

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

Delta Air Lines

Apr 28

7:00am

ONT

12h 19m

ATL

DTW

Apr 28

7:19pm

PHL

as low as

$176

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

Hawaiian Airlines

May 5

4:29pm

ONT

13h 15m

SEA

May 6

5:44am

PHL

as low as

$185

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

United Airlines

May 7

5:05am

ONT

10h 39m

Direct

May 7

3:44pm

PHL

as low as

$198

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

American Airlines

May 7

1:14pm

ONT

10h 40m

PHX

May 7

11:54pm

PHL

as low as

$203

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

American Airlines

May 13

10:53am

ONT

10h 31m

DFW

May 13

9:24pm

PHL

as low as

$203

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

United Airlines

May 8

6:08am

ONT

10h 53m

IAH

May 8

5:01pm

PHL

as low as

$221

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

American Airlines

Apr 24

10:40pm

ONT

11h 4m

CLT

Apr 25

9:44am

PHL

as low as

$221

Flights to Philadelphia

Return flights

Flights From Philadelphia To Ontario International Airport

Browse origins

Flights
North America
United States
California
Los Angeles
Ontario International Airport

Browse destinations

Flights
North America
United States
Pennsylvania
Philadelphia

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Flight Deals from Ontario International Airport to Philadelphia from $129

Stops

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Cabin Class

Departure Airports

Arrival Airports

Layover Airports

Best Price. GUARANTEED.

Top Deals on flights from Ontario International Airport to Philadelphia

Flights to Philadelphia

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