$156 Cheap Frontier Airlines flights Ontario Intl. Airport (ONT) to Philadelphia (PHL)

$156 Cheap Frontier Airlines flights Ontario Intl. Airport (ONT) to Philadelphia (PHL)

Prices were available within the past 7 days and start at $156 for one-way flights and $267 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 29 - Sat, Sep 12

ONT

Ontario

PHL

Philadelphia

$267 Roundtrip, found 6 days ago

$267

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Aug 29 from Ontario to Philadelphia, returning Sat, Sep 12, priced at $267 found 6 days ago

Sat, Aug 29 - Sat, Sep 12

ONT

Ontario

PHL

Philadelphia

$287 Roundtrip, found 6 days ago

$287

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Aug 29 from Ontario to Philadelphia, returning Sat, Sep 12, priced at $287 found 6 days ago

Tue, Jun 23 - Wed, Jul 1

ONT

Ontario

PHL

Philadelphia

$320 Roundtrip, found 18 hours ago

$320

Roundtrip

found 18 hours ago

Select Frontier Airlines flight, departing Tue, Jun 23 from Ontario to Philadelphia, returning Wed, Jul 1, priced at $320 found 18 hours ago

Sat, Aug 29 - Sat, Sep 12

ONT

Ontario

PHL

Philadelphia

$321 Roundtrip, found 6 days ago

$321

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Aug 29 from Ontario to Philadelphia, returning Sat, Sep 12, priced at $321 found 6 days ago

Tue, Jun 23 - Thu, Jul 2

ONT

Ontario

PHL

Philadelphia

$340 Roundtrip, found 18 hours ago

$340

Roundtrip

found 18 hours ago

Select Frontier Airlines flight, departing Tue, Jun 23 from Ontario to Philadelphia, returning Thu, Jul 2, priced at $340 found 18 hours ago

Sat, Aug 29 - Sat, Sep 12

ONT

Ontario

PHL

Philadelphia

$341 Roundtrip, found 6 days ago

$341

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Aug 29 from Ontario to Philadelphia, returning Sat, Sep 12, priced at $341 found 6 days ago