AirHint found the following cheapest return flights from Philadelphia (PHL) to Mumbai (BOM) in December 2025 (see full year).

Return flights

01 Dec - 16 Dec	Frontier Airlines
09 Dec - 16 Dec	Lufthansa
04 Dec - 28 Dec	Frontier Airlines
12 Dec - 19 Dec	Frontier Airlines
04 Dec - 29 Dec	Frontier Airlines
06 Dec - 19 Jan	Lufthansa
05 Dec - 19 Jan	Spirit Airlines
07 Dec - 29 Dec	Aer Lingus
08 Dec - 29 Dec	Frontier Airlines
05 Dec - 29 Dec	Frontier Airlines
06 Dec - 29 Dec	Frontier Airlines
08 Dec - 31 Dec	Frontier Airlines
30 Dec - 06 Jan	Frontier Airlines
08 Dec - 01 Jan	Frontier Airlines
17 Dec - 08 Jan	Aer Lingus
08 Dec - 04 Jan	Frontier Airlines
13 Dec - 05 Jan	Aer Lingus
08 Dec - 03 Jan	Frontier Airlines
14 Dec - 05 Jan	Aer Lingus
08 Dec - 02 Jan	Aer Lingus

Also check the deals for one-way flights from Philadelphia to Mumbai in December.

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 Mumbai in December from 954€

Return flights