Cheapest return flights from San Juan to Keflavik in January from 817€

AirHint found the following cheapest return flights from San Juan (SJU) to Keflavik (KEF) in January 2026 (see full year).

Return flights

16 Jan - 24 Jan Icelandair
21 Jan - 24 Jan Frontier Airlines

Also check the deals for one-way flights from San Juan to Keflavik in January.

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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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