AirHint found the following cheapest return flights from San Francisco (SFO) to Bangalore (BLR) in September 2025 (see full year).

Return flights

29 Sep - 23 Oct	Singapore Airlines
30 Sep - 08 Oct	Singapore Airlines
09 Sep - 24 Oct	Air India
16 Sep - 24 Sep	Air India
01 Sep - 24 Sep	Air India
01 Sep - 25 Sep	Air India
02 Sep - 24 Sep	Air India
01 Sep - 22 Sep	Delta
15 Sep - 05 Oct	Delta
03 Sep - 16 Sep	Delta
03 Sep - 29 Sep	Delta
01 Sep - 23 Sep	Delta
10 Sep - 17 Sep	Delta
22 Sep - 27 Oct	Delta
10 Sep - 23 Sep	Virgin Atlantic
29 Sep - 23 Oct	Air India	direct
30 Sep - 08 Oct	Air India	direct

Also check the deals for one-way flights from San Francisco to Bangalore in September.

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 San Francisco to Bangalore in September from 583€

Return flights