Find flights
When to book
Airlines
FAQs

Cheap flights from Buffalo to San Juan from C$ 127

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 22/1. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SJU
24 Dec — 31 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 24 November 2025.

Round-trip from

C$ 333

One-way from

C$ 127

Popular in

December

Cheapest in

September

Average price

C$ 520
Frontier
  • Frontier
  • 25/1-29/1
  • 2 total stops
  • 25h 10m total
  • Buffalo to San Juan
Search Deals
Frontier
  • Frontier
  • 22/1
  • 1 total stop
  • 13h 25m total
  • Buffalo to San Juan
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find 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 24 November 2025.

Thu 27/1112:05 p.m.BUF - SJU
1 stop10h 08mDelta
Tue 2/127:00 a.m.SJU - BUF
1 stop11h 18mDelta
Deal found 23/11C$ 450
Thu 4/1210:30 a.m.BUF - SJU
2 stops13h 06mUnited Airlines
Tue 9/128:10 a.m.SJU - BUF
1 stop9h 43mUnited Airlines
Deal found 22/11C$ 482
Thu 25/122:07 p.m.BUF - SJU
1 stop11h 43mFrontier
Tue 30/126:00 a.m.SJU - BUF
1 stop7h 52mFrontier
Deal found 23/11C$ 541
Fri 12/1210:30 a.m.BUF - SJU
1 stop9h 30mUnited Airlines
Tue 16/122:05 a.m.SJU - BUF
2 stops12h 07mUnited Airlines
Deal found 21/11C$ 547
Fri 12/1212:45 p.m.BUF - SJU
2 stops10h 50mSouthwest
Wed 17/125:45 a.m.SJU - BUF
2 stops9h 35mSouthwest
Deal found 21/11C$ 553
Sun 14/123:00 p.m.BUF - SJU
1 stop6h 22mUnited Airlines
Mon 15/122:05 a.m.SJU - BUF
2 stops12h 07mUnited Airlines
Deal found 22/11C$ 568
Wed 26/1110:50 a.m.BUF - SJU
1 stop9h 10mUnited Airlines
Thu 27/112:05 a.m.SJU - BUF
2 stops15h 43mUnited Airlines
Deal found 22/11C$ 570
Wed 26/116:12 a.m.BUF - SJU
1 stop7h 03mDelta
Fri 28/112:10 p.m.SJU - BUF
1 stop10h 49mDelta
Deal found 22/11C$ 574
Wed 10/126:00 a.m.BUF - SJU
1 stop7h 40mUnited Airlines
Sun 14/122:05 a.m.SJU - BUF
2 stops15h 48mUnited Airlines
Deal found 23/11C$ 589

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 24 November 2025.
Use the filters below to find and compare flights from Buffalo to San Juan that are best for you.

Fly from

Buffalo

Fly to

San Juan

Route

Depart

Return

Price

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 15/4

7:26 p.m.-2:55 a.m.

1 stop7h 29m

San Juan Luis Munoz Marin Intl

Tue 21/4

1:59 a.m.-8:59 a.m.

1 stop7h 00m

C$ 347

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 13/1

10:45 a.m.-10:22 p.m.

2 stops10h 37m

San Juan Luis Munoz Marin Intl

Tue 20/1

2:05 a.m.-1:24 p.m.

2 stops12h 19m

C$ 355

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Thu 5/2

2:30 p.m.-12:05 a.m.

1 stop8h 35m

San Juan Luis Munoz Marin Intl

Mon 9/2

6:10 a.m.-11:55 a.m.

1 stop6h 45m

C$ 360

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Fri 20/2

5:20 p.m.-1:05 a.m.

1 stop6h 45m

San Juan Luis Munoz Marin Intl

Sat 28/2

5:35 a.m.-12:40 p.m.

1 stop8h 05m

C$ 391

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sun 25/1

2:49 p.m.-10:22 p.m.

1 stop6h 33m

San Juan Luis Munoz Marin Intl

Wed 28/1

2:05 a.m.-1:24 p.m.

2 stops12h 19m

C$ 400

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 23/2

12:35 p.m.-12:40 a.m.

2 stops11h 05m

San Juan Luis Munoz Marin Intl

Sat 28/2

5:35 a.m.-12:40 p.m.

1 stop8h 05m

C$ 410

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Thu 22/1

7:59 p.m.-10:24 a.m.

1 stop13h 25m

C$ 127

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 24/12

6:10 a.m.-3:01 p.m.

1 stop7h 51m

C$ 138

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 6/5

6:25 a.m.-12:50 p.m.

1 stop6h 25m

C$ 149

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 21/2

2:08 p.m.-11:58 p.m.

1 stop8h 50m

C$ 149

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/11

Showing 1-10 of 16 results
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 21 November 2025.

Booking 72 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, May is the cheapest month in which you can book a flight from Buffalo to San Juan (average of C$ 199). Flying from Buffalo to San Juan in June is currently the most expensive (average of C$ 358). 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 24 November 2025.

One of the essential ways to save on airfare from Buffalo to San Juan is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 17% on airfare.

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 24 November 2025.
See what other customers who have flown with Southwest,Delta, andUnited Airlines 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
4,252 reviews
Check prices

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,252 reviews
Southwest
8.0
Very good
4,252 reviews
Check prices

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,252 reviews
Check prices

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,041 reviews
Southwest
8.0
Very good
4,252 reviews
Check prices

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
JetBlue
7.2
Good
2,903 reviews
Southwest
8.0
Very good
4,252 reviews
Check prices

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,096 reviews
Southwest
8.0
Very good
4,252 reviews
Check prices

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 JetBlue, United Airlines, and Southwest fly from Buffalo to San Juan in about 7h 29m. The time it takes to get you to your destination can typically vary by up to 3h 08m. 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$ 169, 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 Frontier and JetBlue - these airlines can fly you to your destination from C$ 237 and C$ 395, respectively. Delta is currently priced 69% below the average price you’ll pay for this route.

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

    C$ 127 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on JetBlue and Delta, with prices starting from C$ 138 and C$ 149, respectively.

  • 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, May is the cheapest month in which you can book a flight from Buffalo to San Juan (average of C$ 199). Flying from Buffalo to San Juan in June is currently the most expensive (average of C$ 358). 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.

Alternative routes for Buffalo to San Juan

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Luis Munoz Marin Intl flights
Newark 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 24 November 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 169AverageC$ 639FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
FrontierCheapestC$ 237AverageC$ 391FlexibilityNo cancel feeOn-time62%
Search Frontier flights
JetBlueCheapestC$ 395AverageC$ 591FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
SouthwestCheapestC$ 400AverageC$ 709FlexibilityNo cancel feeOn-time63%
Search Southwest flights
United AirlinesCheapestC$ 531AverageC$ 872FlexibilityNo cancel feeOn-time69%
Search United Airlines 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.

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.