Cheap flights from Louisville to San Juan
Cheapest current fares: $147 in September 2026 on connecting flights.
Cheapest month-by-month fares
Lowest available fare per calendar month from Louisville (SDF) to San Juan (SJU). Refreshed daily.
Louisville (SDF) → San Juan (SJU)
- September 2026 $147
Frequently asked questions
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What is the cheapest month to fly from Louisville to San Juan?
Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Louisville (SDF) to San Juan (SJU), with fares starting from $147.
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What is the lowest current fare from SDF to SJU?
The lowest currently-listed fare from Louisville (SDF) to San Juan (SJU) is $147 on 2026-09-09.
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Is there a direct flight from Louisville to San Juan?
There is currently no non-stop service from SDF to SJU. Most travellers connect through a hub airport. See our route page for current stopover options.
Related guides for this route
Sibling pages — full route detail, airport overviews, visa context, per-airline routes.