AirHint found the following cheapest return flights from Austin (AUS) to Keflavik (KEF) in May 2026 (see full year).

Return flights

11 May - 19 May	KLM
12 May - 20 May	KLM
09 May - 17 May	Air France
10 May - 18 May	Air France
04 May - 12 May	Lufthansa
01 May - 09 May	Lufthansa
05 May - 13 May	British Airways
08 May - 16 May	KLM
18 May - 26 May	KLM
19 May - 27 May	KLM
26 May - 02 Jun	United
28 May - 04 Jun	United
25 May - 02 Jun	United
26 May - 03 Jun	United
28 May - 05 Jun	United
27 May - 04 Jun	United
27 May - 03 Jun	United
30 May - 06 Jun	United
25 May - 01 Jun	United
24 May - 01 Jun	United

Also check the deals for one-way flights from Austin to Keflavik in May.

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 Austin to Keflavik in May from $607

Return flights