AirHint found the following cheapest return flights from Kolkata (CCU) to San Francisco (SFO) in April 2026 (see full year).
Return flights
| 08 Apr - 15 Apr | Singapore Airlines | ||
| 08 Apr - 12 Apr | Singapore Airlines | ||
| 06 Apr - 20 Apr | Singapore Airlines |
Also check the deals for one-way flights from Kolkata to San Francisco in April.
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