AirHint found the following cheapest return flights from Jacksonville (JAX) to Philadelphia (PHL) in October 2025 (see full year).

Return flights

09 Oct - 12 Oct	Frontier Airlines
10 Oct - 12 Oct	Frontier Airlines	direct
11 Oct - 16 Oct	Frontier Airlines	direct
31 Oct - 07 Nov	Frontier Airlines	direct
13 Oct - 16 Oct	Frontier Airlines	direct
13 Oct - 17 Oct	Frontier Airlines	direct
09 Oct - 13 Oct	Frontier Airlines
30 Oct - 03 Nov	Frontier Airlines
30 Oct - 03 Nov	Frontier Airlines	direct
17 Oct - 20 Oct	Frontier Airlines	direct
12 Oct - 16 Oct	Frontier Airlines	direct
24 Oct - 26 Oct	Delta
29 Oct - 03 Nov	Delta
22 Oct - 25 Oct	Delta

Also check the deals for one-way flights from Jacksonville to Philadelphia in October.

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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Cheapest return flights from Jacksonville to Philadelphia in October from 105€

Return flights