Cheapest return flights from Seattle to Split in September from 620€

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

Return flights

09 Sep - 14 Sep Lufthansa
21 Sep - 24 Sep Frontier Airlines
09 Sep - 12 Sep Icelandair
09 Sep - 13 Sep Icelandair
19 Sep - 27 Sep Lufthansa

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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