jetBlueDepart18:20
Tue, Dec 15BOS → SJU
6h 23m · 1 stop
$132one way, per person
View deal
- Cheapest fare
- $132
- Cheapest month
- December
- Direct flights
- Yes
- Flight time
- 4h 05m
jetBlue · Tue, Dec 15
from $132
jetBlue
2,700 km
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Cheapest month to fly from Boston 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.
jetBluejetBlueDepart20:32
Sat, Dec 19BOS → SJU
6h 22m · 1 stop
$259one way, per person
View deal
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About flights from Boston to San Juan
Boston (BOS) and San Juan (SJU) are about 2,700 km apart. Direct flights take around 4h 05m, and recent direct fares were with jetBlue. Over the next few months, one-way fares start from $132, 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 Boston to San Juan?
The cheapest one-way fare we've seen recently is $132 with jetBlue, departing Tuesday, December 15, 2026. Over the coming months, the lowest fare in each month ranges from $132 to $148.
What is the cheapest month to fly from Boston to San Juan?
December 2026 currently has the lowest fares, from $132 one way.
Are there direct flights from Boston to San Juan?
Yes. Recent direct fares were with jetBlue.
How long is the flight from Boston to San Juan?
A direct flight takes about 4h 05m. Boston and San Juan are around 2,700 km apart.
Which airlines fly from Boston to San Juan?
Recent fares on this route were with jetBlue.
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