San Juan

$120+ Cheap flights from Buffalo (BUF) to San Juan

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SJU
Jun 5 — Jun 121
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Buffalo to San Juan with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Buffalo to San Juan are usually found in September or May, booked 88 days in advance, depart on a Wednesday or Monday and return on a Monday

Cheap flight deals from Buffalo to San Juan

Cheapest flights from Buffalo to San Juan
Explore the most affordable flight options available from Buffalo to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 6, 2026.

This Expedia deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/99:02 pm
BUF
-
SJU
1 stop10h 55m
Frontier
Tue 7/148:00 am
SJU
-
BUF
1 stop12h 16m
Frontier
Deal found 4/30$256
This Frontier deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:52 pm
BUF
-
SJU
1 stop12h 17m
Frontier
Thu 8/278:00 am
SJU
-
BUF
1 stop12h 12m
Frontier
Deal found 5/3$258
This SmartFares deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/89:19 am
BUF
-
SJU
Nonstop3h 54m
JetBlue
Fri 5/157:00 pm
SJU
-
BUF
Nonstop4h 48m
JetBlue
Deal found 5/1$262
This Priceline deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/162:47 pm
BUF
-
SJU
1 stop7h 56m
Multiple Airlines
Sat 5/236:20 pm
SJU
-
BUF
Nonstop4h 49m
Multiple Airlines
Deal found 4/30$269
This Cheapflightsfares deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/99:19 am
BUF
-
SJU
Nonstop3h 54m
JetBlue
Fri 5/157:00 pm
SJU
-
BUF
Nonstop4h 48m
JetBlue
Deal found 4/30$270
This Priceline deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/87:16 am
BUF
-
SJU
Nonstop3h 55m
Multiple Airlines
Mon 6/159:24 am
SJU
-
BUF
1 stop9h 48m
Multiple Airlines
Deal found 4/30$271
This JetBlue deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/189:19 am
BUF
-
SJU
Nonstop3h 54m
JetBlue
Fri 5/226:20 pm
SJU
-
BUF
Nonstop4h 49m
JetBlue
Deal found 4/30$275
This Frontier deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:52 pm
BUF
-
SJU
1 stop12h 17m
Frontier
Mon 8/249:24 am
SJU
-
BUF
1 stop9h 43m
Frontier
Deal found 5/5$276
This Booking.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/149:02 pm
BUF
-
SJU
1 stop10h 53m
Frontier
Sun 6/219:24 am
SJU
-
BUF
1 stop9h 48m
Frontier
Deal found 5/2$278
This JetBlue deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/87:16 am
BUF
-
SJU
Nonstop3h 55m
JetBlue
Sat 6/136:20 pm
SJU
-
BUF
Nonstop4h 38m
JetBlue
Deal found 5/2$280
This Priceline deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/79:02 pm
BUF
-
SJU
1 stop29h 09m
Frontier
Mon 7/136:31 pm
SJU
-
BUF
1 stop24h 35m
Frontier
Deal found 5/2$284
This Priceline deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/162:47 pm
BUF
-
SJU
1 stop7h 56m
Frontier
Sat 5/238:59 am
SJU
-
BUF
1 stop10h 00m
Frontier
Deal found 4/30$289

Find flight deals from Buffalo to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 6, 2026.

Round-trip from

$256
(Expedia)

One-way from

$120
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$320
From Buffalo to San Juan
One-way flight from Buffalo to San Juan
Highest demand for flights based on searches. 11% potential increase in price ($50 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Average for round-trip flights in May 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Buffalo to San Juan that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 6, 2026.
Use the filters below to find and compare flights from Buffalo to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 5/18

9:19 am-1:13 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Fri 5/22

5:01 am-12:35 pm

1 stop7h 34m

$327

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 5/12

6:04 am-12:34 pm

1 stop6h 30m

San Juan Luis Munoz Marin Intl

Tue 5/19

7:40 am-4:54 pm

1 stop9h 14m

$347

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 5/9

5:00 pm-11:15 pm

1 stop6h 15m

San Juan Luis Munoz Marin Intl

Fri 5/15

4:25 pm-11:20 pm

1 stop6h 55m

$358

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 7/28

9:00 am-12:45 am

2 stops15h 45m

San Juan Luis Munoz Marin Intl

Wed 8/12

1:20 pm-9:45 pm

1 stop8h 25m

$378

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 5/30

7:45 am-4:20 pm

1 stop8h 35m

San Juan Luis Munoz Marin Intl

Tue 6/2

3:30 am-1:42 pm

1 stop10h 12m

$387

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 5/9

10:45 am-9:24 pm

2 stops10h 39m

San Juan Luis Munoz Marin Intl

Fri 5/15

7:40 am-4:54 pm

1 stop9h 14m

$392

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Fri 5/8

6:25 am-1:20 pm

1 stop6h 55m

San Juan Luis Munoz Marin Intl

Wed 5/13

1:14 pm-11:59 pm

1 stop10h 45m

$398

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sun 5/10

5:30 pm-11:45 pm

1 stop6h 15m

San Juan Luis Munoz Marin Intl

Sun 5/17

5:00 am-11:50 am

1 stop6h 50m

$418

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 5/30

3:53 pm-11:35 pm

1 stop7h 42m

San Juan Luis Munoz Marin Intl

Thu 6/18

1:10 pm-12:38 am

1 stop11h 28m

$419
Cheapest one-way

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Fri 5/29

7:16 am-11:11 am

Nonstop3h 55m

$133

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/1

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Best time to book a flight from Buffalo to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Buffalo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Buffalo to San Juan

How far ahead should I book a flight from Buffalo to San Juan?

To ensure you get the cheapest price possible for a flight from Buffalo to San Juan, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Buffalo to San Juan?

Currently, April is the cheapest month in which you can book a flight from Buffalo to San Juan (average of $93). Flying from Buffalo to San Juan in July is currently the most expensive (average of $200). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BUF to SJU?

Find hourly flight availability from Buffalo to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 6, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Buffalo to San Juan as you normally would.

How much does it cost to fly round-trip from Buffalo to San Juan?

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Juan. Reviews last updated May 6, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andAmerican Airlines from Buffalo to San Juan by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Comfort

8.0

Food

7.0

Overall

7.9

Crew

8.6

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Buffalo to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Buffalo to San Juan?

    Buffalo (BUF) is the airport you will fly out of if you book a flight from Buffalo to San Juan. You should not have trouble finding flights to San Juan from Buffalo; the airport handles an average of 0 outbound flights to San Juan per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Buffalo airport to San Juan. It is only a 8.3 mi journey to Buffalo (BUF) from Buffalo’s city center.

  • How long is the flight from Buffalo to San Juan?

    For as low as $327, JetBlue can have you in San Juan from Buffalo in 3h 54m. The distance from Buffalo to San Juan is about 1848 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Buffalo to San Juan round-trip?

    Delta, at $112, was found to be the cheapest airline from Buffalo to San Juan.Alternate airlines to your destination round-trip include Frontier and JetBlue. These flights start at 70% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Buffalo to San Juan one-way?

    The cheapest airlines for a one-way flight from Buffalo to San Juan are Frontier ($96), Southwest ($102), and Delta ($102).

  • What are the cheapest flights from Buffalo to San Juan?

    Looking at all options, your cheapest flight can be booked for $141. While the most popular route (Buffalo - San Juan Luis Munoz Marin Intl) can be booked for $245 on average, our data indicates $321 when flying from Buffalo to San Juan.

  • Where are the most common layover locations when flying from Buffalo to San Juan?

  • What are some popular things to do or see while on a layover in New York?

    New York travelers tend to visit Times Square, New York City Center, and Madison Square Garden more than anywhere else. Travelers on a layover in New York can visit Times Square, New York City Center, and Madison Square Garden, by traveling 13.6 mi, 13.6 mi, and 13.6 mi, respectively after landing at New York John F Kennedy Intl. Travelers can book a car rental at New York John F Kennedy Intl for about $67 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Buffalo to San Juan flights?

  • Can I find deals for flights from Buffalo to San Juan that include hotel bookings?

    Yes. In addition to deals on Buffalo to San Juan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to San Juan.

  • Can I find deals for business class flights from Buffalo to San Juan?

    Yes. Cheapflights offers flight deals from Buffalo to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Buffalo to San Juan?

    Currently, April is the cheapest month in which you can book a flight from Buffalo to San Juan (average of $93). Flying from Buffalo to San Juan in July is currently the most expensive (average of $200). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Buffalo to San Juan

Discover the top 6 airlines that operate flights from Buffalo to San Juan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$112Average$264FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$125Average$255FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$203Average$524FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$211Average$504FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$225Average$412FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$231Average$436FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.