174 € Cheap Flights from Buffalo Niagara to San Juan

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Flight deals from Buffalo Niagara to San Juan

Looking for a cheap last-minute deal or the best return flight from Buffalo Niagara Airport to San Juan? If you want to travel next month, return fares start from 181 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Buffalo Niagara to San Juan

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Buffalo Niagara to San Juan flights are currently cheapest in May.

Direct flights from Buffalo Niagara to San Juan

Buffalo to San Juan: Flight information

The things to know before you go.
Cheapest flight found174 €
Cheapest month to flyMay
Average flight time4 hrs, 12 mins
Most popular airlinejetBlue
Average flights per week6

Finding cheap flights from Buffalo Niagara to San Juan: Frequently asked questions

There are 6 airports in San Juan: San Juan Isla Grande, San Juan Luis Munoz Marin, Roosevelt Roads, Ponce, Vieques, and Culebra.
The best price we found for a return flight from Buffalo Niagara to San Juan is 174 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
4 hours and 12 minutes is the average flight time from Buffalo Niagara to San Juan.
jetBlue flies direct from Buffalo Niagara to San Juan.
As of May 2026, there are 6 flights per week flying from Buffalo Niagara to San Juan.
The cheapest month to fly from Buffalo Niagara to San Juan is usually May.
If you're flying from Buffalo Niagara Airport, the cheapest airport near San Juan is San Juan Luis Munoz Marin – which is 11.3 km away from the centre of San Juan. We've found flights into this airport from 174 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Buffalo Niagara Airport to San Juan on Saturday, 23 May 2026.
Yes – the average flight time is 4 hours and 12 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Juan but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Juan is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 27°C. August is typically the warmest month in San Juan, when it usually averages around 29°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging 23°C. The rainiest month is September.
Currently, Frontier Airlines and jetBlue offer the cheapest flight tickets to San Juan.

Flying from Buffalo Niagara International Airport (BUF) to San Juan: what you need to know

  • Book a direct flight from Buffalo Niagara International Airport to San Juan and you'll be in the air for an average of 4 hours 25 minutes.

  • San Juan is one hour ahead of Buffalo, where Buffalo Niagara International Airport is located. San Juan observes the UTC-4 timezone.

  • Buffalo Niagara International Airport (BUF) to Luis Munoz Marin International Airport (SJU) is the busiest route. When looking for your flight, you can choose from two services a week between BUF and SJU.

  • For stress-free travel, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to board your BUF to San Juan flight.

  • You can expect longer lines during popular months like August. Arriving up to four hours in advance for an international flight and two hours for domestic departures will give you plenty of time for security and boarding.

  • You can book a direct Buffalo Niagara International Airport to San Juan ticket. Begin your trip at BUF and touch down at Luis Munoz Marin International Airport (SJU).

  • Keep an eye out for deals with JetBlue Airways. This airline has direct flights from Buffalo Niagara International Airport to San Juan.

  • A stopover is the perfect opportunity to break up your trip and possibly even visit a new city. When searching for plane tickets from BUF to San Juan, uncheck the 'Direct flights only' box to see where you can stop along the way. Top options include:

    • Atlanta Hartsfield-Jackson International Airport (ATL)

    • New York John F. Kennedy International Airport (JFK)

    • Baltimore Washington International Airport (BWI)

  • BUF is around 13 kilometres from central Buffalo. If you're ride-sharing, catching a taxi or driving from the centre, it'll take you 20 minutes or so to get there, depending on the traffic. If you're using public transport, expect the journey time to be around 40 minutes.

  • Looking for a hotel close to BUF? If you're boarding an early flight from Buffalo Niagara International Airport to San Juan, these stays set you up for a seamless send-off:

  • Of the departures from Buffalo Niagara International Airport, 74% arrive on time at their destination.

  • BUF is located at Genesee Street.

How to find the cheapest flights from Buffalo Niagara International Airport (BUF) to San Juan

  • 83 € is the lowest price we've found for a one-way Buffalo Niagara International Airport to San Juan flight. A return plane ticket right now is 174 €. Depending on the availability and when you book, these fares may change.

  • Don't leave everything to the last minute. You're more likely to pick up cheap flights from BUF to San Juan if you book early. Airlines often offer some excellent early bird discounts.

  • The 'Whole month' search tool will show you the cheapest tickets from Buffalo Niagara International Airport to San Juan across every month. It's a great way to snap up a bargain if your dates are flexible.

  • Spend less time searching for cheap flights from BUF to San Juan by creating a Price Alert. We'll send you an email or notification through the app when a lower fare pops up.

  • Tailor your trip with filters. Pick your ideal departure and arrival times, airlines and total journey duration. You can also sort your results by 'Fastest,' 'Best' or 'Cheapest' flights from Buffalo Niagara International Airport to San Juan.

Airports in San Juan

Luis Munoz Marin International Airport (SJU)

  • Luis Munoz Marin International Airport (SJU) is around 11 kilometres from the centre of San Juan. If you're opting for a ride-share or a taxi, the drive takes roughly 20 minutes.

  • If you're using public transport, expect a journey time of around 1 hour.

  • Think about booking a hotel close to SJU if you're coming in on a late flight from Buffalo Niagara International Airport to San Juan. Select one of these options and make arrival day easier:

  • Reserving your vehicle from Luis Munoz Marin International Airport about two weeks ahead of your flight from BUF to San Juan can help you secure the lowest rate.

Best time to go to San Juan

  • March is the most popular month for flights from Buffalo Niagara International Airport to San Juan. To avoid the crowds, plan your trip to San Juan in December.

  • Book a Buffalo Niagara International Airport to San Juan plane ticket with a departure in August if you're eager to visit the city during its warmest month. Expect temperatures to range from 24ºC (75ºF) to 32ºC (90ºF).

  • For cooler conditions, search for a cheap ticket from BUF to San Juan in February when temperatures average between 21ºC (70ºF) and 28ºC (82ºF).

More about San Juan

  • Start your San Juan trip right by choosing the ideal place to stay. As soon as you've booked your flight from Buffalo Niagara International Airport to San Juan, browse our range of hotels including:

  • There are so many things to do and see in this city it can be tricky to work out where to start. Esperanza Beach, Balneario El Escambron and Escambron Green are top attractions which should be on every San Juan itinerary.

Explore more of Puerto Rico

  • San Juan will leave a lasting impression, but there are so many other corners of Puerto Rico waiting to be discovered. Around 113 kilometres west of San Juan, a visit to Aguadilla will keep you on the move. Start with leading sights like Silla Aguadilla, Bridges Surf Beach and Playa Rompe Olas.

  • Isabela is another must-experience destination in Puerto Rico and is around 105 kilometres west of San Juan. No trip is complete without visiting Playa montones, Shore Island Beach and Guajataca Forest Reserve.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.