Cheapest one-way flights from Philadelphia to Boston in January from $61

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

One-Way flights

20 Jan Frontier Airlines
07 Jan Spirit Airlines
11 Jan jetBlue direct
15 Jan Delta direct
20 Jan Delta direct
09 Jan jetBlue direct
07 Jan American Airlines direct
08 Jan Spirit Airlines
05 Jan jetBlue direct
03 Jan American Airlines direct

Also check the deals for return flights from Philadelphia to Boston 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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