Cheap flights from Buffalo to San Juan from $121 BUF → SJU
Buffalo Niagara International Airport (BUF) → Luis Munoz Marin International Airport (SJU)
The cheapest return found recently is $246 with jetBlue, 12 Dec – 19 Dec, found yesterday. The cheapest one-way found recently is $121 with jetBlue, 12 Dec, found yesterday.
- Cheapest one-way found recently
- $121, found yesterday
- Cheapest return found recently
- $246, 12 Dec to 19 Dec
- Usual return price
- $328 to $407
- Cheapest month to fly
- December 2026, return fares from $246 found in the last 7 days
Return
The cheapest return fare on each of 4 departure dates is usually $328 to $407.
Cheapest return found recently
$246
12 Dec – 19 Dec · jetBlue
Buffalo Niagara International Airport (BUF) → Luis Munoz Marin International Airport (SJU)
Leaves 6:00 a.m. · Return leaves 3:58 a.m. · 25 h 39 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$246 12 Dec – 19 Decfound yesterdaySee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 32 days, 24 Sept to 12 Nov, the cheapest return we saw each day was $246 to $436.
At $246, the cheapest return found recently is at the low end of that range.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 12 Dec to 26 Jun 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 7-night return fares leaving within 3 days of 12 Dec to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 12 Dec – 19 Dec | $246 | jetBlue | Buffalo Niagara International Airport (BUF) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 27 Feb 2027 – 6 Mar 2027 | $392 | jetBlue | Buffalo Niagara International Airport (BUF) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 23 Mar 2027 – 31 Mar 2027 | $355 | United Airlines | Buffalo Niagara International Airport (BUF) → Luis Munoz Marin International Airport (SJU) | out 2 stops, back 2 stops | found yesterday | See prices for these dates |
| 26 Jun 2027 – 3 Jul 2027 | $453 | Southwest Airlines | Buffalo Niagara International Airport (BUF) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back nonstop | found 2 days ago | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $246.
Airlines on the cheapest dates: jetBlue, United Airlines, Southwest Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$121
12 Dec · jetBlue
Buffalo Niagara International Airport (BUF) → Luis Munoz Marin International Airport (SJU)
Leaves 6:00 a.m. · 7 h 54 min trip
1 stop
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$121 12 Decfound yesterdayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 17 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $118 to $293.
17 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 2 departure dates and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 12 Dec to compare.
Every date we hold
2 fares on 2 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 12 Dec | $121 | jetBlue | Buffalo Niagara International Airport (BUF) → Luis Munoz Marin International Airport (SJU) | 1 stop | found yesterday | Open this trip |
| 18 Dec | $153 | American Airlines | Buffalo Niagara International Airport (BUF) → Luis Munoz Marin International Airport (SJU) | 1 stop | found yesterday | Open this trip |
Airlines on the cheapest dates: jetBlue, American Airlines.
Premium cabin fares from Buffalo to San Juan
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 12 Dec – 19 Dec in another cabin: Premium economy · Business · First
Today's prices for 12 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Buffalo to San Juan?
Return
Not enough history yet: in 32 days of return prices, 24 Sept to 12 Nov, fewer than 3 booking ranges had prices on 7 days or more.
One-way
Not enough history yet: in 17 days of one-way prices, 24 Sept to 12 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Toronto → San Juan
95 km from Buffalo
C$493 (US$346)
C$143 (US$100) more than flying from Buffalo
25 Jan 2027 – 5 Feb 2027 · YYZ → SJU · out 1 stop, back 1 stop
found today
Rochester → San Juan
107 km from Buffalo
$975
$729 more than flying from Buffalo
23 Dec – 3 Jan 2027 · ROC → SJU · out 1 stop, back 2 stops
found yesterday
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Rochester → San Juan
107 km from Buffalo
$242
$121 more than flying from Buffalo
2 Jan 2027 · ROC → SJU · 1 stop
found yesterday
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 12 Dec – 19 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Buffalo to San Juan?
The cheapest return found recently is $246 with jetBlue, 12 Dec to 19 Dec, found yesterday. The cheapest return fare on each of 4 departure dates is usually $328 to $407.
How much is a one-way flight from Buffalo to San Juan?
The cheapest one-way found recently is $121 with jetBlue, 12 Dec, found yesterday.
What is the cheapest month to fly from Buffalo to San Juan?
December 2026 is the cheapest month for a return, from $246, 12 Dec to 19 Dec, found yesterday.
How long is the flight from Buffalo to San Juan?
The cheapest one-way found recently, with jetBlue on 12 Dec, takes 7 h 54 min with 1 stop.
Which airlines have the cheapest flights from Buffalo to San Juan?
Between 12 Dec and 26 Jun 2027, jetBlue has the cheapest return on 2 of the 4 departure dates we hold, United Airlines on 1 and Southwest Airlines on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work