Flights from San Francisco to Allentown

Cheapest flights from San Francisco

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.

Mon, Aug 18 - Tue, Aug 19

OAK

Oakland Intl.

PHL

Philadelphia Intl.

$195 Roundtrip, found 2 days ago

$195

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Mon, Aug 18 from Oakland Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $195 found 2 days ago

Fri, Aug 15 - Tue, Aug 19

OAK

Oakland Intl.

PHL

Philadelphia Intl.

$219 Roundtrip, found 2 days ago

$219

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Fri, Aug 15 from Oakland Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $219 found 2 days ago

Mon, Aug 18 - Thu, Aug 21

OAK

Oakland Intl.

PHL

Philadelphia Intl.

$225 Roundtrip, found 2 days ago

$225

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Mon, Aug 18 from Oakland Intl. to Philadelphia Intl., returning Thu, Aug 21, priced at $225 found 2 days ago

Tue, Aug 12 - Tue, Aug 19

OAK

Oakland Intl.

PHL

Philadelphia Intl.

$233 Roundtrip, found 2 days ago

$233

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Tue, Aug 12 from Oakland Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $233 found 2 days ago

Tue, Aug 12 - Wed, Aug 20

SFO

San Francisco Intl.

PHL

Philadelphia Intl.

$244 Roundtrip, found 3 days ago

$244

Roundtrip

found 3 days ago

Select JetBlue Airways flight, departing Tue, Aug 12 from San Francisco Intl. to Philadelphia Intl., returning Wed, Aug 20, priced at $244 found 3 days ago

Wed, Sep 10 - Tue, Sep 16

SFO

San Francisco Intl.

PHL

Philadelphia Intl.

$247 Roundtrip, found 2 days ago

$247

Roundtrip

found 2 days ago

Select JetBlue Airways flight, departing Wed, Sep 10 from San Francisco Intl. to Philadelphia Intl., returning Tue, Sep 16, priced at $247 found 2 days ago

Fri, Aug 15 - Thu, Aug 21

OAK

Oakland Intl.

PHL

Philadelphia Intl.

$249 Roundtrip, found 2 days ago

$249

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Fri, Aug 15 from Oakland Intl. to Philadelphia Intl., returning Thu, Aug 21, priced at $249 found 2 days ago

Thu, Aug 14 - Mon, Aug 18

OAK

Oakland Intl.

PHL

Philadelphia Intl.

$258 Roundtrip, found 2 days ago

$258

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Thu, Aug 14 from Oakland Intl. to Philadelphia Intl., returning Mon, Aug 18, priced at $258 found 2 days ago

Tue, Aug 12 - Thu, Aug 21

OAK

Oakland Intl.

PHL

Philadelphia Intl.

$263 Roundtrip, found 2 days ago

$263

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Tue, Aug 12 from Oakland Intl. to Philadelphia Intl., returning Thu, Aug 21, priced at $263 found 2 days ago

Thu, Aug 14 - Sun, Aug 17

OAK

Oakland Intl.

PHL

Philadelphia Intl.

$265 Roundtrip, found 2 days ago

$265

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Thu, Aug 14 from Oakland Intl. to Philadelphia Intl., returning Sun, Aug 17, priced at $265 found 2 days ago

Sun, Sep 14 - Tue, Sep 16

SFO

San Francisco Intl.

PHL

Philadelphia Intl.

$267 Roundtrip, found 2 days ago

$267

Roundtrip

found 2 days ago

Select JetBlue Airways flight, departing Sun, Sep 14 from San Francisco Intl. to Philadelphia Intl., returning Tue, Sep 16, priced at $267 found 2 days ago

Thu, Aug 7 - Sun, Aug 10

SFO

San Francisco Intl.

PHL

Philadelphia Intl.

$268 Roundtrip, found 4 days ago

$268

Roundtrip

found 4 days ago

Select American Airlines flight, departing Thu, Aug 7 from San Francisco Intl. to Philadelphia Intl., returning Sun, Aug 10, priced at $268 found 4 days ago

Sat, Sep 13 - Sun, Sep 21

SFO

San Francisco Intl.

PHL

Philadelphia Intl.

$277 Roundtrip, found 2 days ago

$277

Roundtrip

found 2 days ago

Select Delta flight, departing Sat, Sep 13 from San Francisco Intl. to Philadelphia Intl., returning Sun, Sep 21, priced at $277 found 2 days ago

Tue, Aug 12 - Wed, Aug 20

SFO

San Francisco Intl.

PHL

Philadelphia Intl.

$289 Roundtrip, found 3 days ago

$289

Roundtrip

found 3 days ago

Select United flight, departing Tue, Aug 12 from San Francisco Intl. to Philadelphia Intl., returning Wed, Aug 20, priced at $289 found 3 days ago

Tue, Aug 12 - Wed, Aug 20

SFO

San Francisco Intl.

PHL

Philadelphia Intl.

$289 Roundtrip, found 3 days ago

$289

Roundtrip

found 3 days ago

Select American Airlines flight, departing Tue, Aug 12 from San Francisco Intl. to Philadelphia Intl., returning Wed, Aug 20, priced at $289 found 3 days ago

Sat, Oct 4 - Wed, Oct 22

SFO

San Francisco Intl.

ABE

Lehigh Valley Intl.

$309 Roundtrip, found 16 hours ago

$309

Roundtrip

found 16 hours ago

Select Delta flight, departing Sat, Oct 4 from San Francisco Intl. to Lehigh Valley Intl., returning Wed, Oct 22, priced at $309 found 16 hours ago

Tue, Jul 29 - Wed, Aug 6

SFO

San Francisco Intl.

PHL

Philadelphia Intl.

$318 Roundtrip, found 2 days ago

$318

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Jul 29 from San Francisco Intl. to Philadelphia Intl., returning Wed, Aug 6, priced at $318 found 2 days ago

Thu, Dec 25 - Thu, Jan 1

SJC

Norman Y. Mineta San Jose Intl.

PHL

Philadelphia Intl.

$358 Roundtrip, found 5 days ago

$358

Roundtrip

found 5 days ago

Select Delta flight, departing Thu, Dec 25 from Norman Y. Mineta San Jose Intl. to Philadelphia Intl., returning Thu, Jan 1, priced at $358 found 5 days ago

Thu, Jul 31 - Mon, Aug 4

SFO

San Francisco Intl.

TTN

Mercer

$379 Roundtrip, found 2 days ago

$379

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Jul 31 from San Francisco Intl. to Mercer, returning Mon, Aug 4, priced at $379 found 2 days ago

Thu, Aug 7 - Sun, Aug 10

SFO

San Francisco Intl.

PHL

Philadelphia Intl.

$528 Roundtrip, found 4 days ago

$528

Roundtrip

found 4 days ago

Select Sun Country Airlines flight, departing Thu, Aug 7 from San Francisco Intl. to Philadelphia Intl., returning Sun, Aug 10, priced at $528 found 4 days ago