AirHint found the following cheapest return flights from Seattle (SEA) to Istanbul (IST) in January 2026 (see full year).

Return flights

07 Jan - 21 Jan	British Airways
07 Jan - 31 Jan	British Airways
04 Jan - 18 Jan	British Airways
07 Jan - 21 Jan	Turkish Airlines	direct
20 Jan - 01 Feb	Air Canada
20 Jan - 01 Feb	Turkish Airlines	direct
07 Jan - 31 Jan	Turkish Airlines	direct
04 Jan - 18 Jan	Turkish Airlines	direct
01 Jan - 04 Jan	Air France
01 Jan - 04 Jan	Turkish Airlines	direct

Also check the deals for one-way flights from Seattle to Istanbul in January.

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 Seattle to Istanbul in January from $726

Return flights