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

Return flights

04 Sep - 22 Sep	Air India
04 Sep - 15 Sep	Air India
11 Sep - 22 Sep	Air India
04 Sep - 19 Sep	Air India
09 Sep - 17 Sep	Air India
03 Sep - 15 Sep	Air India
08 Sep - 19 Sep	Air India
18 Sep - 22 Sep	Air India
09 Sep - 21 Sep	Air India
03 Sep - 21 Sep	Air India
25 Sep - 06 Oct	Air India	direct
26 Sep - 06 Oct	Air India
10 Sep - 10 Oct	Air India
02 Sep - 02 Oct	Air India
26 Sep - 03 Oct	Air India
17 Sep - 13 Oct	KLM
10 Sep - 20 Oct	KLM
04 Sep - 03 Oct	Air India
19 Sep - 05 Oct	Air India
20 Sep - 03 Oct	Air India

Also check the deals for one-way flights from Bangalore to San Francisco 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 Bangalore to San Francisco in September from 510€

Return flights