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San Juan

$84+ Cheap flights from Buffalo (BUF) to San Juan

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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SJU
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Buffalo to San Juan are usually found in September or March, booked 44 days in advance, depart on a Tuesday or Monday and return on a Thursday

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 October 30, 2025.

Round-trip from

$246
(Frontier)

One-way from

$84
(Priceline)

Popular in

December

Cheapest in

September

Average price

$378
From Buffalo to San Juan
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One-way flight from Buffalo to San Juan
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Highest demand for flights based on searches. 2% potential increase in price ($11 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Buffalo to San Juan

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 October 30, 2025.

This Frontier deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2910:24 amBUF - SJU
1 stop13h 42mFrontier
Sun 12/77:00 amSJU - BUF
1 stop10h 00mFrontier
Deal found 10/30$246
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:00 amBUF - SJU
1 stop9h 20mDelta
Wed 11/197:15 amSJU - BUF
1 stop8h 50mDelta
Deal found 10/28$253
This Frontier deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:29 pmBUF - SJU
2 stops12h 03mFrontier
Thu 11/203:59 amSJU - BUF
1 stop11h 44mFrontier
Deal found 10/28$254
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:48 amBUF - SJU
2 stops9h 34mUnited Airlines
Tue 11/182:05 amSJU - BUF
2 stops12h 12mUnited Airlines
Deal found 10/29$257
This Trip.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amBUF - SJU
1 stop7h 22mJetBlue
Wed 11/198:05 amSJU - BUF
1 stop8h 34mJetBlue
Deal found 10/30$264
This Southwest deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:00 amBUF - SJU
1 stop13h 30mSouthwest
Wed 11/123:55 pmSJU - BUF
1 stop7h 30mSouthwest
Deal found 10/29$268
This Frontier deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:54 pmBUF - SJU
2 stops17h 25mFrontier
Thu 11/203:59 amSJU - BUF
1 stop11h 44mFrontier
Deal found 10/28$275
This Southwest deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:10 pmBUF - SJU
1 stop8h 55mSouthwest
Wed 11/196:40 amSJU - BUF
1 stop6h 25mSouthwest
Deal found 10/29$277
This JetBlue deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:00 amBUF - SJU
1 stop7h 22mJetBlue
Wed 11/191:59 amSJU - BUF
1 stop8h 00mJetBlue
Deal found 10/28$282
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:10 pmBUF - SJU
1 stop10h 10mDelta
Thu 12/183:32 pmSJU - BUF
1 stop9h 27mDelta
Deal found 10/30$284
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:00 amBUF - SJU
1 stop7h 40mUnited Airlines
Fri 11/147:45 amSJU - BUF
2 stops16h 37mUnited Airlines
Deal found 10/29$285
This Southwest deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/105:30 amBUF - SJU
1 stop13h 20mSouthwest
Thu 11/205:45 amSJU - BUF
2 stops9h 35mSouthwest
Deal found 10/29$290

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 2,558,603 searches. Data last updated October 30, 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 1/21

10:45 am-10:22 pm

2 stops10h 37m

San Juan Luis Munoz Marin Intl

Fri 1/23

8:10 am-8:29 pm

2 stops13h 19m

$250

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 11/10

7:00 am-5:20 pm

1 stop9h 20m

San Juan Luis Munoz Marin Intl

Thu 11/20

7:15 am-3:05 pm

1 stop8h 50m

$253

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 11/5

7:00 am-9:30 pm

1 stop13h 30m

San Juan Luis Munoz Marin Intl

Wed 11/12

3:55 pm-10:25 pm

1 stop7h 30m

$268

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 11/11

7:00 am-3:22 pm

1 stop7h 22m

San Juan Luis Munoz Marin Intl

Thu 11/20

5:23 am-10:51 am

1 stop6h 28m

$282

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Fri 11/14

10:08 am-6:20 pm

1 stop7h 12m

San Juan Luis Munoz Marin Intl

Wed 11/19

9:30 am-3:39 pm

1 stop7h 09m

$282

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Fri 11/14

10:08 am-6:20 pm

1 stop7h 12m

San Juan Luis Munoz Marin Intl

Thu 11/20

5:23 am-10:51 am

1 stop6h 28m

$282

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 11/8

7:28 pm-3:48 am

1 stop7h 20m

San Juan Luis Munoz Marin Intl

Mon 11/17

12:30 pm-8:34 pm

1 stop9h 04m

$282

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 11/10

7:00 am-3:40 pm

1 stop7h 40m

San Juan Luis Munoz Marin Intl

Fri 11/14

7:45 am-11:22 pm

2 stops16h 37m

$285

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 11/12

12:40 pm-12:35 am

2 stops10h 55m

San Juan Luis Munoz Marin Intl

Wed 11/19

6:40 am-12:05 pm

1 stop6h 25m

$299

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 11/11

6:12 am-2:10 pm

1 stop6h 58m

San Juan Luis Munoz Marin Intl

Wed 11/19

7:15 am-3:05 pm

1 stop8h 50m

$312

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 24 results
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2
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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

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 October 24, 2025.

To ensure you get the cheapest price possible for a flight from Buffalo to San Juan, you should look to book at least 44 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 $141). Flying from Buffalo to San Juan in June is currently the most expensive (average of $254). 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 October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Buffalo to San Juan in the afternoon. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Buffalo to San Juan?

Use this chart to determine the cheapest time to fly round-trip from Buffalo to San Juan. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Buffalo to San Juan flight should consider departing on Tuesday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 30, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and American Airlines from Buffalo to San Juan by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
4,243 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
American Airlines
7.2
Good
11,034 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
2,906 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
3,123 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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?

    Buffalo (BUF) is the airport you will fly out of if you book a flight from Buffalo to San Juan. You should not have trouble finding flights to San Juan from Buffalo; the airport handles an average of 0 outbound flights to San Juan per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Buffalo airport to San Juan. It is only a 8.3 mi journey to Buffalo (BUF) from Buffalo’s city center.

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

    For as low as $253, United Airlines can have you in San Juan from Buffalo in 9h 20m. The distance from Buffalo to San Juan is about 1848 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Frontier, at $130, was found to be the cheapest airline from Buffalo to San Juan.Alternate airlines to your destination round-trip include Delta and Southwest. These flights start at 67% lower than the current average price 3 months from now.

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

    The cheapest airlines for a one-way flight from Buffalo to San Juan are Delta ($113), American Airlines ($120), and Southwest ($128).

  • Where are the most common layover locations when flying from Buffalo to San Juan?

    Most of the time, Buffalo to San Juan flights that have layovers will stop in New York.

  • What are some popular things to do or see while on a layover in New York?

    New York travelers tend to visit Times Square, New York City Center, and Madison Square Garden more than anywhere else. Travelers on a layover in New York can visit Times Square, New York City Center, and Madison Square Garden, by traveling 13.6 mi, 13.6 mi, and 13.6 mi, respectively after landing at New York John F Kennedy Intl. Travelers can book a car rental at New York John F Kennedy Intl for about $62 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Buffalo to San Juan flights?

    Buffalo to San Juan flights that have layovers will least frequently stop in Orlando.

  • 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 $141). Flying from Buffalo to San Juan in June is currently the most expensive (average of $254). 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.
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Top 6 airlines flying from Buffalo to San Juan

Discover the top 6 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 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$269FlexibilityNo cancel feeOn-time62%
DeltaCheapest$161Average$312FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$225Average$494FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$264Average$394FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$276Average$416FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$284Average$416FlexibilityNo cancel feeOn-time69%

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