Cheapest return flights from Sydney to Keflavik in September from $1517

Best time to book flights for Sydney (SYD) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Sydney (SYD) to Keflavik (KEF) in September 2025 (see full year).

Return flights

08 Sep - 21 Sep Singapore Airlines
04 Sep - 13 Sep Singapore Airlines
13 Sep - 24 Sep Singapore Airlines
25 Sep - 05 Oct British Airways
11 Sep - 05 Oct Singapore Airlines
01 Sep - 19 Sep Singapore Airlines
27 Sep - 06 Oct Qatar Airways

Also check the deals for one-way flights from Sydney to Keflavik in September.

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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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