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Cheap flights from Buffalo to San Juan from C$ 136

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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SJU
27 Apr — 4 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Buffalo to San Juan

Enter your travel dates to find the best prices.

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 28 March 2026.

Sat 11/47:10 a.m.
BUF
-
SJU
Nonstop3h 55m
JetBlue
Sat 18/46:30 p.m.
SJU
-
BUF
Nonstop4h 49m
JetBlue
Deal found 28/3C$ 369
Tue 5/56:05 a.m.
BUF
-
SJU
1 stop6h 47m
Delta
Wed 6/512:55 p.m.
SJU
-
BUF
1 stop10h 42m
Delta
Deal found 27/3C$ 379
Tue 28/46:05 a.m.
BUF
-
SJU
1 stop6h 47m
Delta
Fri 1/56:15 a.m.
SJU
-
BUF
1 stop9h 24m
Delta
Deal found 27/3C$ 380
Mon 4/56:10 a.m.
BUF
-
SJU
1 stop6h 24m
United Airlines
Wed 6/51:00 a.m.
SJU
-
BUF
2 stops8h 53m
United Airlines
Deal found 26/3C$ 385
Tue 8/97:00 a.m.
BUF
-
SJU
1 stop9h 31m
Delta
Wed 16/97:00 a.m.
SJU
-
BUF
1 stop7h 39m
Delta
Deal found 28/3C$ 391
Mon 4/56:10 a.m.
BUF
-
SJU
1 stop6h 24m
United Airlines
Thu 7/51:00 a.m.
SJU
-
BUF
2 stops8h 53m
United Airlines
Deal found 26/3C$ 401
Wed 15/47:20 a.m.
BUF
-
SJU
Nonstop3h 54m
JetBlue
Sat 18/46:30 p.m.
SJU
-
BUF
Nonstop4h 49m
JetBlue
Deal found 27/3C$ 409
Tue 13/106:00 a.m.
BUF
-
SJU
1 stop6h 34m
United Airlines
Tue 20/104:55 p.m.
SJU
-
BUF
1 stop6h 31m
United Airlines
Deal found 28/3C$ 419
Mon 4/55:20 p.m.
BUF
-
SJU
1 stop6h 20m
Southwest
Tue 12/55:35 a.m.
SJU
-
BUF
2 stops9h 00m
Southwest
Deal found 27/3C$ 420
Tue 5/56:05 a.m.
BUF
-
SJU
1 stop6h 47m
Delta
Thu 7/52:48 p.m.
SJU
-
BUF
1 stop9h 11m
Delta
Deal found 27/3C$ 422

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 28 March 2026.

Round-trip from

C$ 379

One-way from

C$ 136

Popular in

December

Cheapest in

September

Average price

C$ 469
Delta
  • Delta
  • 5/5-6/5
  • 2 total stops
  • 17h 29m total
  • Buffalo to San Juan
Search Deals
Frontier
  • Frontier
  • 11/5
  • 1 total stop
  • 6h 37m total
  • Buffalo to San Juan
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 629,999 searches. Data last updated 28 March 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

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 5/5

11:02 a.m.-8:34 p.m.

1 stop9h 32m

San Juan Luis Munoz Marin Intl

Tue 5/5

1:00 a.m.-9:53 a.m.

2 stops8h 53m

C$ 448
Quickest round-trip

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 5/5

2:28 p.m.-9:42 p.m.

1 stop7h 14m

San Juan Luis Munoz Marin Intl

Wed 6/5

7:00 p.m.-11:48 p.m.

Nonstop4h 48m

C$ 451

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 14/9

11:25 a.m.-10:50 p.m.

1 stop11h 25m

San Juan Luis Munoz Marin Intl

Wed 23/9

5:15 a.m.-3:15 p.m.

2 stops10h 00m

C$ 483

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sun 3/5

11:02 a.m.-8:34 p.m.

1 stop9h 32m

San Juan Luis Munoz Marin Intl

Wed 6/5

1:00 a.m.-9:53 a.m.

2 stops8h 53m

C$ 514

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Fri 8/5

11:02 a.m.-9:24 p.m.

2 stops10h 22m

San Juan Luis Munoz Marin Intl

Tue 12/5

1:00 a.m.-9:53 a.m.

2 stops8h 53m

C$ 514
Cheapest one-way

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 12/5

4:00 p.m.-10:40 p.m.

1 stop6h 40m

C$ 159

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 21/4

6:00 a.m.-1:45 p.m.

1 stop7h 45m

C$ 159

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 25/4

10:50 a.m.-11:50 p.m.

2 stops13h 00m

C$ 159

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 18/4

6:00 a.m.-8:38 p.m.

2 stops14h 38m

C$ 159

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 28/4

12:09 p.m.-8:24 p.m.

1 stop8h 15m

C$ 190

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/3

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?

Use this chart to determine the optimal time to book a round-trip flight from Buffalo to San Juan. Price data was last updated on 13 March 2026.

Booking 88 days in advance of your planned departure date is, on average, the best time to get cheap flights from Buffalo to San Juan. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Buffalo to San Juan (average of C$ 179). Flying from Buffalo to San Juan in December is currently the most expensive (average of C$ 356). 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.

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 28 March 2026.
See what other customers who have flown with Southwest,Delta, andJetBlue from Buffalo to San Juan have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,333 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

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.
Southwest
8.0
Very good
4,333 reviews
Southwest
8.0
Very good
4,333 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

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.
Delta
7.9
Good
8,357 reviews
Southwest
8.0
Very good
4,333 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

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.
JetBlue
7.2
Good
2,909 reviews
Southwest
8.0
Very good
4,333 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

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.
American Airlines
7.1
Good
11,520 reviews
Southwest
8.0
Very good
4,333 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

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.
Frontier
5.7
Fair
3,013 reviews
Southwest
8.0
Very good
4,333 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Comfort

8.0

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?

    For a flight from Buffalo to San Juan, you will be flying from Buffalo. Buffalo (BUF) is just 13.4 km from the centre of the city. Buffalo is the only Buffalo airport and it handles 0 outbound flights to San Juan per day. 5 airlines have flights to San Juan from Buffalo on a regular basis.

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

    Airlines like United Airlines and JetBlue fly from Buffalo to San Juan in about 7h 14m. The time it takes to get you to your destination can typically vary by up to 2h 18m. Buffalo and San Juan are separated by a distance of 2974 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    Currently priced at C$ 174, Delta will fly you from Buffalo to San Juan and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Frontier - these airlines can fly you to your destination from C$ 202 and C$ 238, respectively. Delta is currently priced 66% below the average price you’ll pay for this route.

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

    Looking for the cheapest flight from Buffalo to San Juan? While on average our users pay C$ 630, our data indicates the cheapest price to be C$ 128. The most popular route (Buffalo - San Juan Luis Munoz Marin Intl), is priced around C$ 918.

  • 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, August is the cheapest month in which you can book a flight from Buffalo to San Juan (average of C$ 179). Flying from Buffalo to San Juan in December is currently the most expensive (average of C$ 356). 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

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Alternative routes for Buffalo to San Juan

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Luis Munoz Marin Intl flights
John F Kennedy Intl to Luis Munoz Marin Intl flights
Buffalo to Luis Munoz Marin Intl flights

Top 5 airlines flying from Buffalo to San Juan

Discover the top 5 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 629,999 searches. Data last updated 28 March 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 174AverageC$ 427FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 202AverageC$ 505FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FrontierCheapestC$ 238AverageC$ 515FlexibilityNo cancel feeOn-time62%
Search Frontier flights
JetBlueCheapestC$ 295AverageC$ 500FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
SouthwestCheapestC$ 312AverageC$ 631FlexibilityNo cancel feeOn-time63%
Search Southwest flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Buffalo to San Juan?

Cheapflights makes it easy to find Buffalo to San Juan flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Buffalo to San Juan?

Millions of users choose and trust Cheapflights to book the best flight deals from Buffalo to San Juan for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Buffalo to San Juan with no change fees?

Need flexible booking options for your flight to San Juan from Buffalo? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Buffalo to San Juan become cheaper?

Yes! Start tracking prices for Buffalo to San Juan flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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