Best Flights starting from $278
from$278economy
Seattle (Any)
Mon, Sep 7
Roundtrip
Philadelphia (PHL)
Sat, Sep 12
from$307economy
Seattle (Any)
Wed, Sep 9
Roundtrip
Philadelphia (PHL)
Mon, Sep 14
from$307economy
Seattle (Any)
Thu, Sep 10
Roundtrip
Philadelphia (PHL)
Tue, Sep 15
from$312economy
Seattle (Any)
Fri, Sep 11
Roundtrip
Philadelphia (PHL)
Wed, Sep 16
from$322economy
Seattle (Any)
Sat, Sep 12
Roundtrip
Philadelphia (PHL)
Thu, Sep 17
from$339economy
Seattle (Any)
Tue, Sep 8
Roundtrip
Philadelphia (PHL)
Sun, Sep 13
from$339economy
Seattle (Any)
Sun, Sep 13
Roundtrip
Philadelphia (PHL)
Fri, Sep 18
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Other Destinations
Seattle (Any) to Las Vegas (Any) in September from $49
From $49
Seattle (Any) to San Jose (SJC) in September from $79
From $79
Seattle (Any) to Charleston (CHS) in September from $119
From $119
Seattle (Any) to New York (Any) in September from $150
From $150
Seattle (Any) to New York (JFK) in September from $159
From $159
Seattle (Any) to Guadalajara (GDL) in September from $166
From $166
Flights from Other Cities
Chicago (ORD) to Philadelphia (PHL) in September from $64
From $64
Atlanta (ATL) to Philadelphia (PHL) in September from $98
From $98
Tampa (TPA) to Philadelphia (PHL) in September from $99
From $99
Nashville (BNA) to Philadelphia (PHL) in September from $106
From $106
Denver (DEN) to Philadelphia (PHL) in September from $124
From $124
Dallas (DFW) to Philadelphia (PHL) in September from $146
From $146