Southwest AirlinesDepart17:40
Fri, Dec 18BUF → SJU
6h 55m · 2 stops
$141one way, per person
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- Cheapest fare
- $141
- Cheapest month
- December
- Direct flights
- Not recently
- Quickest trip
- 6h 55m
Southwest Airlines · Fri, Dec 18
from $141
Usually 1+ stop
2,970 km
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Cheapest month to fly from Buffalo to San Juan
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in December 2026
The lowest fares we've seen for each day, cheapest first.
Southwest AirlinesPlan the rest of your trip to San Juan
Where to stay, what to do and getting around, from our travel partners.
About flights from Buffalo to San Juan
Buffalo (BUF) and San Juan (SJU) are about 2,970 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 6h 55m. Over the next few months, one-way fares start from $141, and December 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Buffalo to San Juan?
The cheapest one-way fare we've seen recently is $141 with Southwest Airlines, departing Friday, December 18, 2026.
What is the cheapest month to fly from Buffalo to San Juan?
December 2026 currently has the lowest fares, from $141 one way.
Are there direct flights from Buffalo to San Juan?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Buffalo to San Juan?
The quickest journey we've seen takes about 6h 55m. Buffalo and San Juan are around 2,970 km apart.
Which airlines fly from Buffalo to San Juan?
Recent fares on this route were with Southwest Airlines.
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