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Cheap flights from Buffalo to San Juan from C$ 145

BUF — SJU
22 Sep — 29 Sep1
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

Thu 17/911:25 a.m. -
1 stop11h 30m
Sat 19/95:55 a.m. -
1 stop6h 10m
Deal found 20/8C$ 289
Sat 3/105:00 p.m. -
2 stops16h 24m
Tue 6/1012:59 p.m. -
1 stop8h 45m
Deal found 23/8C$ 290
Wed 30/96:30 a.m. -
1 stop7h 15m
Sat 3/101:25 p.m. -
1 stop9h 46m
Deal found 22/8C$ 301
Wed 9/126:00 a.m. -
2 stops14h 00m
Wed 16/122:35 p.m. -
1 stop7h 09m
Deal found 22/8C$ 310
Tue 15/97:00 a.m. -
2 stops13h 38m
Tue 22/97:00 a.m. -
2 stops14h 07m
Deal found 18/8C$ 325
Sat 12/97:00 a.m. -
2 stops13h 38m
Fri 18/91:00 a.m. -
2 stops12h 16m
Deal found 19/8C$ 347
Wed 9/97:00 a.m. -
2 stops13h 38m
Fri 11/91:00 a.m. -
2 stops12h 16m
Deal found 18/8C$ 355
Sun 11/107:00 a.m. -
1 stop7h 44m
Wed 14/104:55 p.m. -
1 stop6h 55m
Deal found 19/8C$ 374
Tue 29/97:00 a.m. -
2 stops13h 38m
Sat 3/107:00 a.m. -
2 stops13h 47m
Deal found 18/8C$ 381
Tue 29/96:05 a.m. -
1 stop10h 44m
Sat 3/102:30 p.m. -
1 stop8h 05m
Deal found 22/8C$ 391

Find flight deals from Buffalo to San Juan

Round-trip from

C$ 289

One-way from

C$ 145

Popular in

December

Cheapest in

March

Average price

C$ 498
Southwest
  • Southwest
  • 17/9-19/9
  • 2 total stops
  • 17h 40m total
  • Buffalo to San Juan
Search Deals
United Airlines
  • United Airlines
  • 19/9
  • 2 total stops
  • 13h 38m total
  • Buffalo to San Juan
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 35 potential savings vs. average RT price).
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Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
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 Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Wed 18/11

6:00 a.m.-2:40 p.m.

1 stop7h 40m

San Juan Luis Munoz Marin Intl

Mon 23/11

2:35 p.m.-10:59 p.m.

1 stop9h 24m

C$ 402
Quickest round-trip

BuffaloSan Juan

BUF Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Sat 3/10

7:00 a.m.-2:44 p.m.

1 stop7h 44m

San Juan Luis Munoz Marin Intl

Tue 6/10

4:55 p.m.-11:50 p.m.

1 stop6h 55m

C$ 416

BuffaloSan Juan

BUF Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Tue 29/9

7:15 a.m.-3:27 p.m.

1 stop8h 12m

San Juan Luis Munoz Marin Intl

Wed 30/9

11:15 a.m.-8:19 p.m.

1 stop9h 04m

C$ 484

BuffaloSan Juan

BUF Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Sat 5/9

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

1 stop7h 45m

San Juan Luis Munoz Marin Intl

Fri 11/9

1:00 a.m.-1:16 p.m.

2 stops12h 16m

C$ 494

BuffaloSan Juan

BUF Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Sun 6/9

6:12 a.m.-12:54 p.m.

1 stop6h 42m

San Juan Luis Munoz Marin Intl

Fri 11/9

1:00 a.m.-1:16 p.m.

2 stops12h 16m

C$ 512

BuffaloSan Juan

BUF Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Thu 17/9

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

2 stops14h 38m

San Juan Luis Munoz Marin Intl

Wed 23/9

1:00 a.m.-9:35 a.m.

2 stops8h 35m

C$ 530

BuffaloSan Juan

BUF Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Fri 29/1

8:40 a.m.-10:00 p.m.

1 stop12h 20m

San Juan Luis Munoz Marin Intl

Sat 13/2

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

1 stop6h 45m

C$ 531

BuffaloSan Juan

BUF Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Tue 29/9

7:00 a.m.-2:44 p.m.

1 stop7h 44m

San Juan Luis Munoz Marin Intl

Tue 29/9

1:00 a.m.-1:11 p.m.

2 stops12h 11m

C$ 563

BuffaloSan Juan

BUF Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Tue 3/11

6:00 a.m.-9:00 p.m.

2 stops14h 00m

San Juan Luis Munoz Marin Intl

Sat 7/11

7:40 a.m.-11:49 p.m.

2 stops17h 09m

C$ 595
Cheapest one-way

BuffaloSan Juan

BUF Buffalo - SJU San Juan Luis Munoz Marin Intl

BUFSJU

Buffalo

Tue 17/11

10:51 a.m.-10:22 p.m.

2 stops10h 31m

C$ 145

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/8

Showing 1-10 of 19 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

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, October is the cheapest month in which you can book a flight from Buffalo to San Juan (average of C$ 461). Flying from Buffalo to San Juan in December is currently the most expensive (average of C$ 797). 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?

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?

Airfare is below average for this route at the moment.
Buffalo to San Juan flights typically cost between C$ 410 and C$ 587 in September.
The cheapest round-trip price found within the last 5 days was C$ 289 on Southwest (17 Sep-19 Sep).

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

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
8.0
Very good
4,214 reviews
Check prices

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

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
8.0
Very good
4,214 reviews
Southwest
8.0
Very good
4,214 reviews
Check prices

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

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
11,981 reviews
Southwest
8.0
Very good
4,214 reviews
Check prices

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

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
3,037 reviews
Southwest
8.0
Very good
4,214 reviews
Check prices

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

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
2,656 reviews
Southwest
8.0
Very good
4,214 reviews
Check prices

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

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

  • 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 Southwest, United Airlines, and JetBlue fly from Buffalo to San Juan in about 6h 30m. The time it takes to get you to your destination can typically vary by up to 7h 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$ 200, 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$ 236 and C$ 293, respectively. American Airlines is currently priced 62% 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$ 545, our data indicates the cheapest price to be C$ 417. The most popular route (Buffalo - San Juan Luis Munoz Marin Intl), is priced around C$ 402.

  • 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, October is the cheapest month in which you can book a flight from Buffalo to San Juan (average of C$ 461). Flying from Buffalo to San Juan in December is currently the most expensive (average of C$ 797). 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

Alternative routes for Buffalo to San Juan

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 4 airlines flying from Buffalo to San Juan

AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 200AverageC$ 486FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FrontierCheapestC$ 236AverageC$ 511FlexibilityNo cancel feeOn-time62%
Search Frontier flights
JetBlueCheapestC$ 293AverageC$ 492FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
SouthwestCheapestC$ 299AverageC$ 617FlexibilityNo cancel feeOn-time63%
Search Southwest flights

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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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