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Cheap flights from Buffalo Niagara to San Juan Luis Munoz Marin

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Compare Buffalo Niagara to San Juan Luis Munoz Marin flight deals

Find the cheapest month or even day of the year to fly to San Juan Luis Munoz Marin

Book the best San Juan Luis Munoz Marin fare with no extra fees

Flight deals from Buffalo Niagara to San Juan Luis Munoz Marin

Looking for a cheap last-minute deal or the best round-trip flight from Buffalo Niagara to San Juan Luis Munoz Marin? Find the lowest prices on one-way and round-trip tickets right here.
San Juan.C$321 per passenger.Departing Fri, Aug 29, returning Sun, Aug 31.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Buffalo Niagara on Fri, Aug 29, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departing from San Juan Luis Munoz Marin on Sun, Aug 31, arriving in Buffalo Niagara.Price includes taxes and charges.From C$321, select.
San Juan.C$321 per passenger.Departing Thu, Sep 4, returning Mon, Sep 8.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Buffalo Niagara on Thu, Sep 4, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departing from San Juan Luis Munoz Marin on Mon, Sep 8, arriving in Buffalo Niagara.Price includes taxes and charges.From C$321, select.
San Juan.C$321 per passenger.Departing Fri, Oct 3, returning Mon, Oct 6.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Buffalo Niagara on Fri, Oct 3, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departing from San Juan Luis Munoz Marin on Mon, Oct 6, arriving in Buffalo Niagara.Price includes taxes and charges.From C$321, select.
San Juan.C$329 per passenger.Departing Sat, Jun 7, returning Sat, Jun 14.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Buffalo Niagara on Sat, Jun 7, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departing from San Juan Luis Munoz Marin on Sat, Jun 14, arriving in Buffalo Niagara.Price includes taxes and charges.From C$329, select.
San Juan.C$330 per passenger.Departing Sat, May 31, returning Sat, Jun 14.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Buffalo Niagara on Sat, May 31, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departing from San Juan Luis Munoz Marin on Sat, Jun 14, arriving in Buffalo Niagara.Price includes taxes and charges.From C$330, select.
San Juan.C$355 per passenger.Departing Sat, Jul 12, returning Sun, Jul 27.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Buffalo Niagara on Sat, Jul 12, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departing from San Juan Luis Munoz Marin on Sun, Jul 27, arriving in Buffalo Niagara.Price includes taxes and charges.From C$355, select.
San Juan.C$373 per passenger.Departing Sat, Nov 8, returning Sat, Nov 15.Round-trip flight with United.Outbound indirect flight with United, departing from Buffalo Niagara on Sat, Nov 8, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with United, departing from San Juan Luis Munoz Marin on Sat, Nov 15, arriving in Buffalo Niagara.Price includes taxes and charges.From C$373, select.
San Juan.C$378 per passenger.Departing Sat, Jun 28, returning Thu, Jul 3.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Buffalo Niagara on Sat, Jun 28, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departing from San Juan Luis Munoz Marin on Thu, Jul 3, arriving in Buffalo Niagara.Price includes taxes and charges.From C$378, select.

Find the cheapest month to fly from Buffalo Niagara to San Juan Luis Munoz Marin

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 Luis Munoz Marin flights are currently cheapest in August.
May
Find prices
Jun
from C$329
Jul
from C$355
Aug
from C$321
Sep
from C$321
Oct
from C$321
Nov
from C$373
Dec
from C$636
Jan
from C$539
Feb
from C$469
Mar
from C$834
Apr
Find prices

Buffalo Niagara to San Juan Luis Munoz Marin: Alternative routes

Compare routes from Buffalo Niagara to San Juan below. You may find an airport to fly into that's cheaper, faster, or easier than San Juan Luis Munoz Marin.

Buffalo to San Juan: Flight information

The things to know before you go.
Cheapest flight foundC$321
Cheapest month to flySeptember

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

The best price we found for a round-trip flight from Buffalo Niagara to San Juan Luis Munoz Marin is C$321. 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.
Currently, there are no airlines that fly direct from Buffalo Niagara to San Juan Luis Munoz Marin. But we found flights with one or more stops from C$321.
There are no flights flying from Buffalo Niagara to San Juan Luis Munoz Marin, as of May 2025.
The cheapest month to fly from Buffalo Niagara to San Juan Luis Munoz Marin is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Buffalo Niagara Airport to San Juan Luis Munoz Marin Airport on Thursday, September 4, 2025.
No airlines currently offer direct flights between Buffalo Niagara Airport and San Juan Luis Munoz Marin Airport. Most routes have one or more stops.
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 Luis Munoz Marin 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.
Currently, Frontier Airlines offers the cheapest flight tickets to San Juan Luis Munoz Marin.

Flying from Buffalo Niagara International Airport (BUF) to Luis Munoz Marin International Airport (SJU): what you need to know

  • Buffalo and San Juan share the UTC-4 timezone. This means you won't have to adjust your watch after you land.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Be at the airport on time to board your BUF to SJU flight.

  • You can expect bigger queues in popular months such as August. Arriving up to four hours in advance for international flights and two hours for a domestic departure will help ensure a smooth travel experience.

  • We make it a piece of cake to book a flight with a stopover. To see all your options for tickets from Buffalo Niagara International Airport to Luis Munoz Marin International Airport, deselect 'Direct flights only.' Then, choose a flight that has a stop long enough to tour your chosen city. Popular stopovers between BUF and SJU include:

    • John F. Kennedy International Airport

    • Baltimore/Wash International Thurgood Marshall Airport

    • Hartsfield-Jackson Atlanta International Airport

How to find the cheapest flights from Buffalo Niagara International Airport (BUF) to Luis Munoz Marin International Airport (SJU)

  • The cheapest price we've seen for a one-way Buffalo Niagara International Airport to Luis Munoz Marin International Airport flight is C$163. A return plane ticket right now is C$321. Depending on the availability and when you book, these fares could change.

  • It's usually smart to book early if you're looking for cheap tickets from BUF to SJU. That's because airlines adjust prices based on demand, which tends to increase closer to the date of departure.

  • Finding cheap flights from Buffalo Niagara International Airport to Luis Munoz Marin International Airport is easy if you can be flexible with your travel plans. Use the 'Whole month' tool to see the lowest fares across every month and land a great deal.

  • Never miss a deal on cheap flights from BUF to SJU by setting up a Price Alert. You'll get an email or notification on the app when a lower fare becomes available.

  • Select your ideal arrival and departure times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Buffalo Niagara International Airport to Luis Munoz Marin International Airport.

Handy information about Buffalo Niagara International Airport (BUF)

  • BUF is located at Genesee Street.

  • 75.46% of flights taking off from Buffalo Niagara International Airport make it to their destination on time.

  • Buffalo Niagara International Airport is about 18 kilometres from central Buffalo. If you're ride-sharing, catching a cab or driving from the centre, it'll take you 20 minutes or so to get there, depending on the traffic.

  • Expect a trip time of about 1 hour 15 minutes when using public transport.

  • Booked an early flight from Buffalo Niagara International Airport to Luis Munoz Marin International Airport? Avoid the last-minute rush to the terminal (and sneak in some extra snooze time) by choosing one of these stays near BUF:

Arriving at Luis Munoz Marin International Airport (SJU)

Getting from Luis Munoz Marin International Airport (SJU) to central San Juan

  • Luis Munoz Marin International Airport to central San Juan has a drive time of around 10 minutes. It's approximately 8 kilometres away.

  • Getting there by public transport will take you around 55 minutes.

When to fly to Luis Munoz Marin International Airport (SJU)

  • July is the most popular month for flights from Buffalo Niagara International Airport to Luis Munoz Marin International Airport. For smaller crowds, go to San Juan in May.

  • Before locking in your flight from Buffalo Niagara International Airport to Luis Munoz Marin International Airport, consider the type of weather you like. September is the warmest month in San Juan, with the temperature ranging from 23ºC (73ºF) to 33ºC (91ºF).

  • Look for cheap tickets from BUF to SJU in February if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between 20ºC (68ºF) and 28ºC (82ºF) on average.

Explore more of Puerto Rico

  • Bayamon is just one of the many cities in Puerto Rico waiting to be explored after you've experienced San Juan. Around 10 kilometres away to the west, its top attractions include Plazoleta Ignacio Zorrilla, La Plaza de la Bomba Puertorriqueña, Monumento a los Trovadores and Parque Palm Court.

  • Carolina is another favourite destination in Puerto Rico and is around 11 kilometres east of San Juan. No journey is complete without seeing Isla Verde Beach, Parque de Doble A Roberto Clemente Walker and Drone Zone Track.

Plan the rest of your trip from Buffalo to San Juan

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