Cheapest return flights from Boston to Philadelphia in August from 111€

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

Return flights

17 Aug - 18 Aug Frontier Airlines
12 Aug - 18 Aug Frontier Airlines
17 Aug - 17 Aug Frontier Airlines
24 Aug - 26 Aug Frontier Airlines
24 Aug - 24 Aug Frontier Airlines
14 Aug - 17 Aug Frontier Airlines direct
20 Aug - 23 Aug Delta direct
15 Aug - 17 Aug Spirit Airlines
05 Aug - 07 Aug Frontier Airlines direct
07 Aug - 17 Aug Spirit Airlines
29 Aug - 02 Sep Delta direct
12 Aug - 01 Sep Spirit Airlines
15 Aug - 05 Sep Spirit Airlines
15 Aug - 03 Sep Spirit Airlines
15 Aug - 04 Sep Spirit Airlines
15 Aug - 01 Sep Spirit Airlines
14 Aug - 03 Sep Spirit Airlines
14 Aug - 04 Sep Spirit Airlines
14 Aug - 01 Sep Spirit Airlines
20 Aug - 05 Sep Spirit Airlines

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

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.

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