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

Return flights

17 Sep - 23 Sep	KLM
17 Sep - 24 Sep	KLM
17 Sep - 30 Sep	KLM
25 Sep - 06 Oct	KLM
17 Sep - 13 Oct	KLM
16 Sep - 30 Sep	Air France
09 Sep - 01 Oct	Air France
10 Sep - 25 Oct	KLM
10 Sep - 17 Sep	KLM
18 Sep - 06 Oct	Air France
08 Sep - 29 Sep	KLM
04 Sep - 27 Sep	KLM
17 Sep - 25 Sep	KLM
26 Sep - 06 Oct	KLM
23 Sep - 28 Sep	KLM
17 Sep - 15 Oct	KLM
14 Sep - 25 Sep	Air France
10 Sep - 10 Oct	KLM
24 Sep - 05 Oct	KLM
18 Sep - 14 Oct	Delta

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 $771

Return flights