AirHint found the following cheapest return flights from Seattle (SEA) to Dubrovnik (DBV) in September 2025 (see full year).

Return flights

09 Sep - 16 Sep	Icelandair
03 Sep - 10 Sep	Turkish Airlines
10 Sep - 17 Sep	Turkish Airlines
17 Sep - 24 Sep	Turkish Airlines
24 Sep - 01 Oct	Turkish Airlines
08 Sep - 15 Sep	Turkish Airlines
16 Sep - 23 Sep	Icelandair
02 Sep - 09 Sep	British Airways
01 Sep - 08 Sep	SWISS
15 Sep - 22 Sep	Icelandair
26 Sep - 03 Oct	Turkish Airlines
29 Sep - 06 Oct	Turkish Airlines
12 Sep - 19 Sep	Turkish Airlines
25 Sep - 02 Oct	Turkish Airlines
28 Sep - 05 Oct	Icelandair

Also check the deals for one-way flights from Seattle to Dubrovnik in September.

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 Dubrovnik in September from 523€

Return flights