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

Return flights

16 Sep - 30 Sep	Air India
16 Sep - 30 Oct	Air India
16 Sep - 28 Oct	Air India
18 Sep - 03 Oct	Air India	direct
08 Sep - 25 Sep	Air India
18 Sep - 30 Sep	Air India
09 Sep - 24 Oct	Air India
01 Sep - 18 Sep	Delta
28 Sep - 07 Oct	Delta
28 Sep - 08 Oct	Delta
29 Sep - 08 Oct	Delta
30 Sep - 08 Oct	Delta
01 Sep - 15 Sep	Delta
08 Sep - 15 Sep	Delta
27 Sep - 04 Oct	Virgin Atlantic
27 Sep - 06 Oct	Virgin Atlantic
05 Sep - 26 Sep	Virgin Atlantic
09 Sep - 29 Sep	Virgin Atlantic
10 Sep - 24 Sep	Virgin Atlantic
05 Sep - 26 Sep	Air India	direct

Also check the deals for one-way flights from San Francisco to Delhi 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 Delhi in September from 561€

Return flights