Flights from Allentown to San Francisco

Cheapest flights from Allentown

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, May 10 - Tue, May 13

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$210 Roundtrip, found 1 day ago

$210

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, May 10 from Philadelphia Intl. to San Francisco Intl., returning Tue, May 13, priced at $210 found 1 day ago

Mon, May 12 - Tue, May 13

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$220 Roundtrip, found 1 day ago

$220

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, May 12 from Philadelphia Intl. to San Francisco Intl., returning Tue, May 13, priced at $220 found 1 day ago

Mon, May 12 - Mon, May 19

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$230 Roundtrip, found 1 day ago

$230

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, May 12 from Philadelphia Intl. to San Francisco Intl., returning Mon, May 19, priced at $230 found 1 day ago

Sat, May 10 - Sun, May 18

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$238 Roundtrip, found 1 day ago

$238

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, May 10 from Philadelphia Intl. to San Francisco Intl., returning Sun, May 18, priced at $238 found 1 day ago

Sat, May 10 - Wed, May 14

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$240 Roundtrip, found 1 day ago

$240

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, May 10 from Philadelphia Intl. to San Francisco Intl., returning Wed, May 14, priced at $240 found 1 day ago

Mon, May 12 - Sun, May 18

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$248 Roundtrip, found 1 day ago

$248

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, May 12 from Philadelphia Intl. to San Francisco Intl., returning Sun, May 18, priced at $248 found 1 day ago

Fri, May 9 - Sat, May 10

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$250 Roundtrip, found 1 day ago

$250

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, May 9 from Philadelphia Intl. to San Francisco Intl., returning Sat, May 10, priced at $250 found 1 day ago

Mon, May 12 - Mon, May 12

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$260 Roundtrip, found 1 day ago

$260

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, May 12 from Philadelphia Intl. to San Francisco Intl., returning Mon, May 12, priced at $260 found 1 day ago

Fri, May 9 - Sat, May 10

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$280 Roundtrip, found 1 day ago

$280

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, May 9 from Philadelphia Intl. to San Francisco Intl., returning Sat, May 10, priced at $280 found 1 day ago

Thu, Aug 7 - Thu, Aug 14

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$289 Roundtrip, found 5 days ago

$289

Roundtrip

found 5 days ago

Select American Airlines flight, departing Thu, Aug 7 from Philadelphia Intl. to San Francisco Intl., returning Thu, Aug 14, priced at $289 found 5 days ago

Fri, May 9 - Sat, May 10

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$291 Roundtrip, found 1 day ago

$291

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, May 9 from Philadelphia Intl. to San Francisco Intl., returning Sat, May 10, priced at $291 found 1 day ago

Thu, Aug 7 - Thu, Aug 14

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$299 Roundtrip, found 5 days ago

$299

Roundtrip

found 5 days ago

Select United flight, departing Thu, Aug 7 from Philadelphia Intl. to San Francisco Intl., returning Thu, Aug 14, priced at $299 found 5 days ago

Mon, May 12 - Thu, May 15

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$301 Roundtrip, found 1 day ago

$301

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, May 12 from Philadelphia Intl. to San Francisco Intl., returning Thu, May 15, priced at $301 found 1 day ago

Tue, Aug 5 - Tue, Sep 9

ABE

Lehigh Valley Intl.

SJC

Norman Y. Mineta San Jose Intl.

$307 Roundtrip, found 1 day ago

$307

Roundtrip

found 1 day ago

Select American Airlines flight, departing Tue, Aug 5 from Lehigh Valley Intl. to Norman Y. Mineta San Jose Intl., returning Tue, Sep 9, priced at $307 found 1 day ago

Tue, Aug 5 - Wed, Aug 13

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$307 Roundtrip, found 5 days ago

$307

Roundtrip

found 5 days ago

Select Delta flight, departing Tue, Aug 5 from Philadelphia Intl. to San Francisco Intl., returning Wed, Aug 13, priced at $307 found 5 days ago

Tue, Aug 5 - Mon, Aug 11

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$308 Roundtrip, found 5 days ago

$308

Roundtrip

found 5 days ago

Select Delta flight, departing Tue, Aug 5 from Philadelphia Intl. to San Francisco Intl., returning Mon, Aug 11, priced at $308 found 5 days ago

Sun, Aug 10 - Fri, Aug 15

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$366 Roundtrip, found 5 days ago

$366

Roundtrip

found 5 days ago

Select JetBlue Airways flight, departing Sun, Aug 10 from Philadelphia Intl. to San Francisco Intl., returning Fri, Aug 15, priced at $366 found 5 days ago

Thu, Aug 7 - Thu, Aug 14

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$403 Roundtrip, found 5 days ago

$403

Roundtrip

found 5 days ago

Select Sun Country Airlines flight, departing Thu, Aug 7 from Philadelphia Intl. to San Francisco Intl., returning Thu, Aug 14, priced at $403 found 5 days ago

Wed, Jun 11 - Wed, Jun 18

ABE

Lehigh Valley Intl.

SFO

San Francisco Intl.

$417 Roundtrip, found 3 hours ago

$417

Roundtrip

found 3 hours ago

Select United flight, departing Wed, Jun 11 from Lehigh Valley Intl. to San Francisco Intl., returning Wed, Jun 18, priced at $417 found 3 hours ago

Sat, May 10 - Sat, May 10

PHL

Philadelphia Intl.

SFO

San Francisco Intl.

$428 Roundtrip, found 1 day ago

$428

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Sat, May 10 from Philadelphia Intl. to San Francisco Intl., returning Sat, May 10, priced at $428 found 1 day ago