Cheapest return flights from Boston to Philadelphia in September from 119€

AirHint found the following cheapest return flights from Boston (BOS) to Philadelphia (PHL) in September 2025 (see full year).

Return flights

02 Sep - 09 Sep jetBlue direct
19 Sep - 21 Sep Spirit Airlines
11 Sep - 14 Sep Frontier Airlines direct
18 Sep - 23 Sep Delta direct
19 Sep - 25 Sep Spirit Airlines
19 Sep - 27 Sep Spirit Airlines
19 Sep - 28 Sep Spirit Airlines
19 Sep - 23 Sep Spirit Airlines
19 Sep - 20 Sep Spirit Airlines
19 Sep - 22 Sep Spirit Airlines
19 Sep - 02 Oct Spirit Airlines
19 Sep - 03 Oct Spirit Airlines
24 Sep - 02 Oct Spirit Airlines
24 Sep - 03 Oct Spirit Airlines
12 Sep - 02 Oct Spirit Airlines
12 Sep - 03 Oct Spirit Airlines
15 Sep - 02 Oct Spirit Airlines
15 Sep - 03 Oct Spirit Airlines
22 Sep - 02 Oct Spirit Airlines
22 Sep - 03 Oct Spirit Airlines

Also check the deals for one-way flights from Boston to Philadelphia in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Philadelphia

Cheap car rent in Philadelphia

Feel free to contact us with any feedback or request another flight research.