AirHint found the following cheapest return flights from Philadelphia (PHL) to Istanbul (IST) in October 2025 (see full year).
Return flights
| 29 Oct - 05 Nov | Air Canada | ||
| 29 Oct - 22 Nov | British Airways | ||
| 29 Oct - 08 Nov | British Airways | ||
| 29 Oct - 09 Nov | British Airways | ||
| 30 Oct - 22 Nov | Spirit Airlines | ||
| 30 Oct - 07 Nov | Aer Lingus |
Also check the deals for one-way flights from Philadelphia to Istanbul in October.
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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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