Fly from San Juan to Brussels for $472 round-trip on Skyteam partners Delta/Air France/KLM.
Searching Air France, we found seats departing San Juan SJU on Wednesday, August 22, returning from Brussels BRU on Wednesday, August 29. Flights connect via Atlanta ATL. Other dates are also available for travel through mid-May and from mid-August onward.
This is part of a Nationwide Sale to Europe on Delta/Skyteam partners that we noticed on Friday and is back today. American has matched with lower fares from some cities.