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

Return flights

20 Oct - 25 Oct	Spirit Airlines
18 Oct - 25 Oct	Spirit Airlines
20 Oct - 04 Nov	Spirit Airlines
18 Oct - 04 Nov	Spirit Airlines
20 Oct - 21 Oct	Spirit Airlines
18 Oct - 21 Oct	Spirit Airlines
31 Oct - 04 Nov	Spirit Airlines
05 Oct - 21 Oct	Spirit Airlines
23 Oct - 25 Oct	Spirit Airlines
23 Oct - 04 Nov	Spirit Airlines
05 Oct - 25 Oct	Spirit Airlines
30 Oct - 04 Nov	Spirit Airlines
18 Oct - 20 Oct	Spirit Airlines
08 Oct - 20 Oct	Spirit Airlines
08 Oct - 25 Oct	Spirit Airlines

Also check the deals for one-way flights from Philadelphia to Rio Negro 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 Philadelphia to Rio Negro in October from 228€

Return flights