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

Return flights

17 Sep - 13 Oct	KLM
17 Sep - 30 Sep	KLM
17 Sep - 27 Sep	KLM
04 Sep - 22 Sep	KLM
17 Sep - 03 Oct	KLM
19 Sep - 03 Oct	KLM
04 Sep - 21 Sep	KLM
17 Sep - 25 Sep	KLM
19 Sep - 26 Sep	Air France
19 Sep - 28 Sep	Delta
19 Sep - 05 Oct	Air France
25 Sep - 04 Oct	KLM
11 Sep - 21 Oct	Air France
08 Sep - 24 Sep	Air India
03 Sep - 09 Sep	Air India
11 Sep - 18 Sep	Air France
21 Sep - 07 Oct	Air France
11 Sep - 11 Oct	Air France
10 Sep - 08 Oct	Air France
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 660€

Return flights