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Cheap flights from Buffalo to San Juan from C$ 144

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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SJU
28 Feb — 7 Mar1
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 29 January 2026.

Sat 21/24:37 p.m.
BUF
-
SJU
1 stop9h 16m
Frontier
Sat 28/25:25 p.m.
SJU
-
BUF
1 stop17h 27m
Frontier
Deal found 27/1C$ 272
Sat 28/24:37 p.m.
BUF
-
SJU
1 stop7h 06m
Frontier
Fri 6/33:58 a.m.
SJU
-
BUF
1 stop7h 51m
Frontier
Deal found 26/1C$ 274
Sun 8/26:00 a.m.
BUF
-
SJU
1 stop7h 31m
Delta
Wed 11/27:30 a.m.
SJU
-
BUF
1 stop11h 24m
Delta
Deal found 27/1C$ 288
Tue 3/37:30 p.m.
BUF
-
SJU
1 stop7h 21m
JetBlue
Tue 10/310:59 p.m.
SJU
-
BUF
1 stop10h 36m
JetBlue
Deal found 27/1C$ 289
Sat 25/411:44 a.m.
BUF
-
SJU
1 stop14h 17m
Frontier
Fri 1/53:08 a.m.
SJU
-
BUF
1 stop7h 41m
Frontier
Deal found 26/1C$ 292
Sat 25/410:50 a.m.
BUF
-
SJU
1 stop9h 44m
United Airlines
Sat 2/57:20 a.m.
SJU
-
BUF
2 stops13h 41m
United Airlines
Deal found 27/1C$ 295
Mon 4/55:20 p.m.
BUF
-
SJU
1 stop6h 20m
Southwest
Fri 8/55:35 a.m.
SJU
-
BUF
1 stop11h 05m
Southwest
Deal found 28/1C$ 307
Fri 6/24:05 p.m.
BUF
-
SJU
1 stop7h 00m
Southwest
Tue 10/26:10 a.m.
SJU
-
BUF
1 stop7h 20m
Southwest
Deal found 28/1C$ 310
Wed 20/57:20 a.m.
BUF
-
SJU
Nonstop3h 54m
JetBlue
Mon 25/53:30 a.m.
SJU
-
BUF
1 stop7h 59m
JetBlue
Deal found 26/1C$ 324
Tue 10/1110:50 a.m.
BUF
-
SJU
1 stop9h 10m
United Airlines
Tue 17/118:30 a.m.
SJU
-
BUF
1 stop6h 16m
United Airlines
Deal found 27/1C$ 331
Mon 2/37:30 p.m.
BUF
-
SJU
1 stop7h 21m
JetBlue
Fri 6/311:59 p.m.
SJU
-
BUF
1 stop10h 36m
JetBlue
Deal found 27/1C$ 337

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 29 January 2026.

Round-trip from

C$ 272

One-way from

C$ 144

Popular in

December

Cheapest in

September

Average price

C$ 490
Frontier
  • Frontier
  • 21/2-28/2
  • 2 total stops
  • 26h 43m total
  • Buffalo to San Juan
Search Deals
Delta
  • Delta
  • 25/2
  • 1 total stop
  • 11h 04m total
  • Buffalo to San Juan
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 29 January 2026.
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

Mon 2/3

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

1 stop8h 35m

San Juan Luis Munoz Marin Intl

Fri 6/3

9:50 p.m.-9:10 a.m.

1 stop12h 20m

C$ 288

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sun 8/2

6:00 a.m.-2:31 p.m.

1 stop7h 31m

San Juan Luis Munoz Marin Intl

Wed 11/2

7:30 a.m.-5:54 p.m.

1 stop11h 24m

C$ 288

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 15/4

2:34 p.m.-11:59 p.m.

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Tue 21/4

1:25 p.m.-12:49 a.m.

1 stop11h 24m

C$ 288

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 25/4

10:50 a.m.-8:34 p.m.

1 stop9h 44m

San Juan Luis Munoz Marin Intl

Sat 2/5

7:20 a.m.-9:01 p.m.

2 stops13h 41m

C$ 295

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 20/5

7:20 a.m.-11:14 a.m.

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Mon 25/5

3:30 a.m.-11:29 a.m.

1 stop7h 59m

C$ 324

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 13/4

12:06 p.m.-11:12 p.m.

1 stop11h 06m

San Juan Luis Munoz Marin Intl

Fri 17/4

6:15 a.m.-3:39 p.m.

1 stop9h 24m

C$ 341

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 14/4

12:06 p.m.-11:12 p.m.

1 stop11h 06m

San Juan Luis Munoz Marin Intl

Mon 20/4

6:15 a.m.-3:53 p.m.

1 stop9h 38m

C$ 341

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 15/4

2:34 p.m.-11:59 p.m.

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Fri 17/4

6:15 a.m.-3:39 p.m.

1 stop9h 24m

C$ 341

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sun 1/3

12:05 p.m.-9:12 p.m.

1 stop8h 07m

San Juan Luis Munoz Marin Intl

Wed 4/3

7:00 a.m.-2:56 p.m.

1 stop8h 56m

C$ 342

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sun 1/3

7:35 p.m.-3:51 a.m.

1 stop7h 16m

San Juan Luis Munoz Marin Intl

Wed 4/3

6:10 a.m.-12:44 p.m.

1 stop7h 34m

C$ 357

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/1

Showing 1-10 of 20 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 23 January 2026.

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, February is the cheapest month in which you can book a flight from Buffalo to San Juan (average of C$ 187). Flying from Buffalo to San Juan in December is currently the most expensive (average of C$ 339). 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 29 January 2026.
See what other customers who have flown with Southwest,Delta, andAmerican 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
4,267 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,267 reviews
Southwest
8.0
Very good
4,267 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,128 reviews
Southwest
8.0
Very good
4,267 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,205 reviews
Southwest
8.0
Very good
4,267 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
JetBlue
7.2
Good
2,892 reviews
Southwest
8.0
Very good
4,267 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,056 reviews
Southwest
8.0
Very good
4,267 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 Southwest, Delta, and United Airlines fly from Buffalo to San Juan in about 7h 31m. The time it takes to get you to your destination can typically vary by up to 2h 13m. 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$ 162, 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$ 198 and C$ 231, respectively. Delta is currently priced 68% below the average price you’ll pay for this route.

  • 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, February is the cheapest month in which you can book a flight from Buffalo to San Juan (average of C$ 187). Flying from Buffalo to San Juan in December is currently the most expensive (average of C$ 339). 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

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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 29 January 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 162AverageC$ 418FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 198AverageC$ 495FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FrontierCheapestC$ 231AverageC$ 399FlexibilityNo cancel feeOn-time62%
Search Frontier flights
SouthwestCheapestC$ 305AverageC$ 657FlexibilityNo cancel feeOn-time63%
Search Southwest flights
JetBlueCheapestC$ 345AverageC$ 501FlexibilityNo cancel feeOn-time62%
Search JetBlue 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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