AirHint found the following cheapest return flights from Kolkata (CCU) to San Francisco (SFO) in September 2025 (see full year).
Return flights
| 01 Sep - 14 Sep | Air India | ||
| 10 Sep - 01 Oct | Air India | ||
| 30 Sep - 05 Oct | Air India |
Also check the deals for one-way flights from Kolkata 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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