Cheapest return flights from Seattle to Split in September from $632

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

Return flights

09 Sep - 16 Sep Aer Lingus
27 Sep - 03 Oct Icelandair
01 Sep - 08 Sep SWISS
26 Sep - 01 Oct Icelandair
08 Sep - 15 Sep SWISS
30 Sep - 07 Oct Icelandair
23 Sep - 30 Sep Icelandair
15 Sep - 22 Sep KLM
05 Sep - 12 Sep Icelandair
12 Sep - 19 Sep Icelandair
02 Sep - 09 Sep Icelandair
10 Sep - 17 Sep Hawaiian Airlines
24 Sep - 01 Oct Icelandair
14 Sep - 21 Sep Lufthansa
26 Sep - 03 Oct Aer Lingus

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

Skyscanner

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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