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Cheap flights from Buffalo to San Juan from C$ 203

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 15/8. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SJU
5 Aug — 12 Aug1
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 6 July 2026.

Tue 22/96:29 p.m.
BUF
-
SJU
1 stop18h 47m
Frontier
Fri 2/104:39 p.m.
SJU
-
BUF
2 stops19h 42m
Frontier
Deal found 2/7C$ 430
Tue 29/96:29 p.m.
BUF
-
SJU
1 stop7h 21m
Frontier
Mon 5/109:05 p.m.
SJU
-
BUF
2 stops15h 16m
Frontier
Deal found 2/7C$ 432
Mon 17/86:00 a.m.
BUF
-
SJU
Nonstop4h 38m
JetBlue
Mon 31/86:27 p.m.
SJU
-
BUF
Nonstop4h 38m
JetBlue
Deal found 1/7C$ 433
Sat 29/87:00 a.m.
BUF
-
SJU
Nonstop4h 40m
JetBlue
Wed 2/96:19 p.m.
SJU
-
BUF
Nonstop4h 38m
JetBlue
Deal found 5/7C$ 434
Tue 22/96:29 p.m.
BUF
-
SJU
1 stop18h 47m
Frontier
Wed 30/94:39 p.m.
SJU
-
BUF
2 stops19h 42m
Frontier
Deal found 2/7C$ 441
Wed 26/810:30 a.m.
BUF
-
SJU
2 stops13h 20m
United Airlines
Sat 29/84:55 p.m.
SJU
-
BUF
1 stop6h 49m
United Airlines
Deal found 1/7C$ 446
Wed 9/96:05 a.m.
BUF
-
SJU
1 stop10h 44m
Delta
Sun 13/97:30 a.m.
SJU
-
BUF
1 stop7h 35m
Delta
Deal found 6/7C$ 449
Sat 29/812:16 p.m.
BUF
-
SJU
1 stop10h 13m
Delta
Wed 2/97:30 a.m.
SJU
-
BUF
1 stop7h 43m
Delta
Deal found 5/7C$ 450
Thu 13/83:55 p.m.
BUF
-
SJU
1 stop6h 55m
Southwest
Wed 19/86:00 a.m.
SJU
-
BUF
1 stop8h 20m
Southwest
Deal found 3/7C$ 451
Tue 6/104:25 p.m.
BUF
-
SJU
1 stop6h 40m
Southwest
Wed 14/105:05 a.m.
SJU
-
BUF
2 stops10h 10m
Southwest
Deal found 1/7C$ 457
Mon 10/86:00 a.m.
BUF
-
SJU
Nonstop4h 38m
JetBlue
Mon 17/86:27 p.m.
SJU
-
BUF
Nonstop4h 38m
JetBlue
Deal found 5/7C$ 458
Mon 31/86:00 a.m.
BUF
-
SJU
Nonstop4h 32m
JetBlue
Wed 2/96:19 p.m.
SJU
-
BUF
Nonstop4h 38m
JetBlue
Deal found 1/7C$ 461

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 6 July 2026.

Round-trip from

C$ 430

One-way from

C$ 203

Popular in

December

Cheapest in

October

Average price

C$ 595
Frontier
  • Frontier
  • 22/9-2/10
  • 3 total stops
  • 38h 29m total
  • Buffalo to San Juan
Search Deals
Frontier
  • Frontier
  • 15/8
  • 2 total stops
  • 12h 13m total
  • Buffalo to San Juan
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 6 July 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 3/11

1:15 p.m.-12:56 a.m.

1 stop10h 41m

San Juan Luis Munoz Marin Intl

Sat 14/11

7:15 a.m.-3:36 p.m.

1 stop9h 21m

C$ 449

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 22/9

12:17 p.m.-10:19 p.m.

1 stop10h 02m

San Juan Luis Munoz Marin Intl

Wed 30/9

7:00 a.m.-2:53 p.m.

1 stop7h 53m

C$ 449

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sun 6/9

6:05 a.m.-1:42 p.m.

1 stop7h 37m

San Juan Luis Munoz Marin Intl

Sat 12/9

1:21 p.m.-12:12 a.m.

1 stop10h 51m

C$ 449

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 29/8

12:16 p.m.-10:29 p.m.

1 stop10h 13m

San Juan Luis Munoz Marin Intl

Wed 2/9

7:30 a.m.-3:13 p.m.

1 stop7h 43m

C$ 450

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 31/8

6:00 a.m.-10:32 a.m.

Nonstop4h 32m

San Juan Luis Munoz Marin Intl

Wed 2/9

5:01 a.m.-2:59 p.m.

1 stop9h 58m

C$ 484
Quickest round-trip

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 4/11

7:55 a.m.-1:28 p.m.

Nonstop4h 33m

San Juan Luis Munoz Marin Intl

Fri 13/11

7:15 p.m.-10:53 p.m.

Nonstop4h 38m

C$ 504

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 17/8

6:00 a.m.-10:38 a.m.

Nonstop4h 38m

San Juan Luis Munoz Marin Intl

Tue 1/9

11:00 a.m.-7:25 p.m.

1 stop8h 25m

C$ 507

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Fri 14/8

3:55 p.m.-10:50 p.m.

1 stop6h 55m

San Juan Luis Munoz Marin Intl

Mon 24/8

5:00 a.m.-11:50 a.m.

1 stop6h 50m

C$ 510

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 14/11

9:55 a.m.-5:20 p.m.

1 stop6h 25m

San Juan Luis Munoz Marin Intl

Sun 22/11

7:15 a.m.-3:36 p.m.

1 stop9h 21m

C$ 511

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 2/11

7:40 a.m.-4:20 p.m.

1 stop7h 40m

San Juan Luis Munoz Marin Intl

Fri 13/11

7:15 p.m.-10:53 p.m.

Nonstop4h 38m

C$ 534

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Showing 1-10 of 23 resultsSorted by cheapest first
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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

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 C$ 132). Flying from Buffalo to San Juan in July is currently the most expensive (average of C$ 341). 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 6 July 2026.

When flying from Buffalo to San Juan, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

Booking 87 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.

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 6 July 2026.
See what other customers who have flown with Southwest,American Airlines, 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
7.9
Good
4,251 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Southwest
7.9
Good
4,251 reviews
Southwest
7.9
Good
4,251 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
American Airlines
7.1
Good
11,783 reviews
Southwest
7.9
Good
4,251 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
JetBlue
7.1
Good
3,008 reviews
Southwest
7.9
Good
4,251 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Frontier
5.6
Fair
2,845 reviews
Southwest
7.9
Good
4,251 reviews
Check prices

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

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. 4 airlines have flights to San Juan from Buffalo on a regular basis.

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

    Airlines like Delta and JetBlue fly from Buffalo to San Juan in about 4h 32m. The time it takes to get you to your destination can typically vary by up to 6h 09m. 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$ 207, American Airlines will fly you from Buffalo to San Juan and back. In addition to American Airlines, 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$ 244 and C$ 302, respectively. American Airlines is currently priced 61% 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, April is the cheapest month in which you can book a flight from Buffalo to San Juan (average of C$ 132). Flying from Buffalo to San Juan in July is currently the most expensive (average of C$ 341). 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.
Buffalo to Luis Munoz Marin Intl flights
Newark to Luis Munoz Marin Intl flights
John F Kennedy Intl to Luis Munoz Marin Intl flights

Top 4 airlines flying from Buffalo to San Juan

Discover the top 4 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 6 July 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 207AverageC$ 563FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FrontierCheapestC$ 244AverageC$ 531FlexibilityNo cancel feeOn-time62%
Search Frontier flights
JetBlueCheapestC$ 302AverageC$ 515FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
SouthwestCheapestC$ 319AverageC$ 636FlexibilityNo 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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