Cheap flights from Seattle to Philadelphia for only $154 roundtrip with United Airlines.

Also works in reverse.

 

DEPART:
Seattle, USA

 

ARRIVE:
Philadelphia, USA

 

RETURN:
Seattle, USA

 

DATES:
Availability from September to October 2021

Example dates:

 

Seattle – Philadelphia
29th Sep – 6th Oct
30th Sep – 5th Oct
1st-5th Oct
1st-6th Oct
2nd-5th Oct
2nd-6th Oct
4th-6th Oct
5th-10th Oct
5th-12th Oct
6th-10th Oct
6th-13th Oct
19th-22nd Oct
19th-23rd Oct
19th-26th Oct
20th-22nd Oct
20th-23rd Oct
20th-25th Oct
20th-27th Oct
23rd-25th Oct
23rd-26th Oct
23rd-27th Oct
23rd-30th Oct
26th-29th Oct
26th-30th Oct
27th-29th Oct
27th-30th Oct
28th-30th Oct

 

Philadelphia – Seattle
29th Sep – 6th Oct
30th Sep – 5th Oct
1st-5th Oct
1st-6th Oct
2nd-5th Oct
2nd-6th Oct
4th-6th Oct
5th-12th Oct
6th-13th Oct
19th-22nd Oct
19th-23rd Oct
19th-26th Oct
20th-22nd Oct
20th-23rd Oct
20th-25th Oct
20th-27th Oct
23rd-25th Oct
23rd-26th Oct
23rd-27th Oct
23rd-30th Oct
26th-29th Oct
26th-30th Oct
27th-29th Oct
27th-30th Oct
28th-30th Oct

and more…

 

STOPS:
Chicago

 

AIRLINES:
United Airlines

 

 

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