Cheapest one-way flights from Boston to Philadelphia in May from 49€

Best time to book flights for Boston (BOS) to Philadelphia (PHL) flights at AirHint

AirHint found the following cheapest one-way flights from Boston (BOS) to Philadelphia (PHL) in May 2025 (see full year).

One-Way flights

06 May Spirit Airlines
05 May Frontier Airlines
03 May Frontier Airlines
10 May Frontier Airlines
12 May Frontier Airlines
01 May Frontier Airlines
17 May Frontier Airlines
09 May Frontier Airlines
06 May jetBlue direct
19 May Frontier Airlines

Also check the deals for return flights from Boston to Philadelphia in May.

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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