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

Return flights

05 Dec - 14 Dec	Air Canada
28 Dec - 31 Jan	Delta
03 Dec - 13 Jan	Turkish Airlines
08 Dec - 17 Jan	Turkish Airlines
08 Dec - 10 Jan	Turkish Airlines
09 Dec - 11 Jan	Turkish Airlines
09 Dec - 20 Jan	Lufthansa
11 Dec - 30 Jan	Turkish Airlines
05 Dec - 02 Jan	Air Canada
12 Dec - 20 Jan	Singapore Airlines
22 Dec - 25 Jan	Air Canada
13 Dec - 27 Dec	SWISS

Also check the deals for one-way flights from Seattle 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 Seattle to Mumbai in December from $868

Return flights