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

Return flights

28 Dec - 28 Jan	British Airways
27 Dec - 28 Jan	British Airways
26 Dec - 28 Jan	British Airways
26 Dec - 30 Jan	British Airways
25 Dec - 28 Jan	Lufthansa
23 Dec - 28 Jan	Lufthansa
23 Dec - 25 Jan	Lufthansa
11 Dec - 18 Dec	Air Canada
07 Dec - 12 Dec	Air Canada
22 Dec - 28 Jan	British Airways
10 Dec - 24 Jan	Spirit Airlines
09 Dec - 15 Jan	Air Canada
08 Dec - 29 Dec	Alaska Airlines
15 Dec - 30 Dec	Lufthansa
13 Dec - 31 Dec	Spirit Airlines
08 Dec - 31 Dec	Spirit Airlines
11 Dec - 31 Dec	Spirit Airlines

Also check the deals for one-way flights from Austin 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 Austin to Mumbai in December from $917

Return flights