AirHint found the following cheapest return flights from Dublin (DUB) to San Juan (SJU) in May 2026 (see full year).

Return flights

04 May - 11 May	WestJet
07 May - 11 May	Finnair
05 May - 20 May	WestJet
11 May - 17 May	WestJet
01 May - 16 May	WestJet
02 May - 09 May	WestJet
07 May - 15 May	Ryanair
06 May - 14 May	Finnair
01 May - 15 May	WestJet
08 May - 15 May	Ryanair
26 May - 05 Jun	Scandinavian Airlines
21 May - 04 Jun	WestJet
31 May - 08 Jun	Scandinavian Airlines
30 May - 06 Jun	Scandinavian Airlines
31 May - 07 Jun	KLM
30 May - 07 Jun	KLM
27 May - 10 Jun	British Airways
31 May - 14 Jun	Air Transat

Also check the deals for one-way flights from Dublin to San Juan 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 Dublin to San Juan in May from $650

Return flights