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

Return flights

22 Sep - 29 Sep	Air France
30 Sep - 07 Oct	KLM
23 Sep - 30 Sep	KLM
24 Sep - 01 Oct	KLM
29 Sep - 06 Oct	KLM
25 Sep - 11 Oct	Delta
25 Sep - 02 Oct	Delta
17 Sep - 23 Sep	KLM
17 Sep - 24 Sep	KLM
04 Sep - 11 Sep	Air India
17 Sep - 05 Oct	KLM
09 Sep - 16 Sep	Air India
06 Sep - 13 Sep	Air India
07 Sep - 14 Sep	Air India
16 Sep - 23 Sep	Air France
15 Sep - 22 Sep	SWISS
17 Sep - 13 Oct	KLM
25 Sep - 16 Oct	Lufthansa
28 Sep - 05 Oct	Virgin Atlantic
19 Sep - 11 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 590€

Return flights