AirHint found the following cheapest return flights from Boston (BOS) to Istanbul (IST) in April 2026 (see full year).

Return flights

08 Apr - 28 Apr	Air Canada
07 Apr - 16 Apr	Air Canada
01 Apr - 15 Apr	Delta
07 Apr - 13 Apr	Air Canada
01 Apr - 28 Apr	Lufthansa
08 Apr - 02 May	Air Canada
03 Apr - 13 Apr	Air Canada
01 Apr - 25 Apr	Air Canada
01 Apr - 28 Apr	Turkish Airlines	direct
01 Apr - 25 Apr	Turkish Airlines	direct
08 Apr - 02 May	Turkish Airlines	direct
07 Apr - 16 Apr	Turkish Airlines	direct

Also check the deals for one-way flights from Boston to Istanbul in April.

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 Boston to Istanbul in April from $508

Return flights