AirHint found the following cheapest return flights from San Diego (SAN) to Istanbul (IST) in April 2026 (see full year).
Return flights
| 19 Apr - 03 May | British Airways | ||
| 16 Apr - 25 Apr | KLM | ||
| 03 Apr - 10 Apr | Lufthansa | ||
| 29 Apr - 10 May | Delta |
Also check the deals for one-way flights from San Diego to Istanbul in April.
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