Cheapest one-way flights from Boston to Philadelphia in January from 50€

AirHint found the following cheapest one-way flights from Boston (BOS) to Philadelphia (PHL) in January 2026 (see full year).

One-Way flights

15 Jan Frontier Airlines
21 Jan Frontier Airlines
22 Jan Frontier Airlines
12 Jan Frontier Airlines
14 Jan Frontier Airlines
27 Jan Frontier Airlines
28 Jan Frontier Airlines
26 Jan Frontier Airlines
20 Jan Delta direct
21 Jan Delta direct

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

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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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