AirHint found the following cheapest return flights from San Juan (SJU) to Frankfurt (FRA) in October 2025 (see full year).

Return flights

29 Oct - 05 Nov	United
07 Oct - 14 Oct	United
15 Oct - 22 Oct	Lufthansa
21 Oct - 28 Oct	United
09 Oct - 16 Oct	United
24 Oct - 31 Oct	Lufthansa
12 Oct - 19 Oct	United
03 Oct - 10 Oct	Lufthansa
06 Oct - 13 Oct	United

Also check the deals for one-way flights from San Juan to Frankfurt in October.

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 San Juan to Frankfurt in October from 557€

Return flights