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San Juan

$113+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SJU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Buffalo to San Juan are usually found in September or November, booked 42 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 September 11, 2025.

Round-trip from

$225
(United Airlines)

One-way from

$113
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$300
From Buffalo to San Juan
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One-way flight from Buffalo to San Juan
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High demand for flights, 0% potential price rise
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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 September 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 September 11, 2025.

This Delta deal was found by Cheapflights users on 9/11. 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 10/206:20 amBUF - SJU
1 stop6h 52mDelta
Sat 10/257:00 amSJU - BUF
1 stop8h 10mDelta
Deal found 9/11$225
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/216:07 amBUF - SJU
2 stops9h 48mAmerican Airlines
Tue 10/281:50 pmSJU - BUF
2 stops9h 52mAmerican Airlines
Deal found 9/10$235
This Delta deal was found by Cheapflights users on 9/10. 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.
Tue 10/213:57 pmBUF - SJU
1 stop7h 59mDelta
Thu 10/237:15 amSJU - BUF
1 stop11h 10mDelta
Deal found 9/10$240
This Delta deal was found by Cheapflights users on 9/9. 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 10/27:00 amBUF - SJU
1 stop9h 17mDelta
Thu 10/91:06 pmSJU - BUF
1 stop10h 50mDelta
Deal found 9/9$253
This Delta deal was found by Cheapflights users on 9/11. 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.
Fri 9/267:00 amBUF - SJU
1 stop9h 20mDelta
Wed 10/17:20 amSJU - BUF
1 stop7h 48mDelta
Deal found 9/11$255
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:14 pmBUF - SJU
1 stop8h 56mAmerican Airlines
Wed 11/55:59 pmSJU - BUF
1 stop6h 27mAmerican Airlines
Deal found 9/11$258
This Southwest deal was found by Cheapflights users on 9/10. 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.
Sat 10/41:05 pmBUF - SJU
1 stop10h 40mSouthwest
Mon 10/65:30 pmSJU - BUF
1 stop6h 20mSouthwest
Deal found 9/10$261
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/98:00 amBUF - SJU
1 stop15h 59mAmerican Airlines
Thu 10/165:30 amSJU - BUF
1 stop12h 48mAmerican Airlines
Deal found 9/9$263
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/21:23 pmBUF - SJU
1 stop25h 59mFrontier
Sun 10/129:19 pmSJU - BUF
1 stop22h 59mFrontier
Deal found 9/10$264
This JetBlue deal was found by Cheapflights users on 9/10. 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.
Fri 10/316:32 pmBUF - SJU
1 stop8h 16mJetBlue
Wed 11/54:00 pmSJU - BUF
1 stop7h 27mJetBlue
Deal found 9/10$279
This Frontier deal was found by Cheapflights users on 9/10. 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 9/207:11 pmBUF - SJU
1 stop7h 23mFrontier
Sat 9/279:26 pmSJU - BUF
2 stops19h 56mFrontier
Deal found 9/10$280

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 September 11, 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

Fri 10/3

5:45 pm-12:45 am

1 stop7h 00m

San Juan Luis Munoz Marin Intl

Sun 10/5

5:45 am-3:50 pm

1 stop10h 05m

$225

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 10/25

3:57 pm-11:56 pm

1 stop7h 59m

San Juan Luis Munoz Marin Intl

Thu 10/30

7:00 am-3:10 pm

1 stop8h 10m

$225

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 10/22

3:57 pm-11:56 pm

1 stop7h 59m

San Juan Luis Munoz Marin Intl

Tue 10/28

7:00 am-3:10 pm

1 stop8h 10m

$225

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Thu 10/23

4:15 pm-12:45 am

1 stop8h 30m

San Juan Luis Munoz Marin Intl

Sun 10/26

5:45 am-3:50 pm

1 stop10h 05m

$225

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 10/20

6:20 am-1:12 pm

1 stop6h 52m

San Juan Luis Munoz Marin Intl

Thu 10/23

7:15 am-6:25 pm

1 stop11h 10m

$225

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 10/29

12:06 pm-9:59 pm

1 stop9h 53m

San Juan Luis Munoz Marin Intl

Tue 11/4

7:00 am-3:10 pm

1 stop9h 10m

$225

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Mon 10/20

6:20 am-1:12 pm

1 stop6h 52m

San Juan Luis Munoz Marin Intl

Sat 10/25

7:00 am-3:10 pm

1 stop8h 10m

$225

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Thu 10/23

3:57 pm-11:56 pm

1 stop7h 59m

San Juan Luis Munoz Marin Intl

Wed 10/29

7:00 am-3:10 pm

1 stop8h 10m

$225

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Fri 9/26

7:00 am-4:20 pm

1 stop9h 20m

San Juan Luis Munoz Marin Intl

Thu 10/2

1:32 pm-12:21 am

1 stop10h 49m

$240

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 10/21

3:57 pm-11:56 pm

1 stop7h 59m

San Juan Luis Munoz Marin Intl

Sat 10/25

7:00 am-3:10 pm

1 stop8h 10m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 22 results
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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 August 29, 2025.

To ensure you get the cheapest price possible for a flight from Buffalo to San Juan, you should look to book at least 42 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, September is the cheapest month in which you can book a flight from Buffalo to San Juan (average of $254). Flying from Buffalo to San Juan in June is currently the most expensive (average of $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.

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 September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Buffalo to San Juan in the evening. If you’re flexible enough to do this you can expect to save up to 31% on your trip compared to booking a flight at noon.

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 September 11, 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
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

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
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

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
8.0
Very good
7,960 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

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
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

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
2,913 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

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
3,177 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

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 $225, Southwest can have you in San Juan from Buffalo in 7h. 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 $135, 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 66% 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), United Airlines ($113), and American Airlines ($118).

  • 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 $76 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, September is the cheapest month in which you can book a flight from Buffalo to San Juan (average of $254). Flying from Buffalo to San Juan in June is currently the most expensive (average of $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

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$135Average$266FlexibilityNo cancel feeOn-time62%
DeltaCheapest$167Average$326FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$244Average$499FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$261Average$447FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$265Average$411FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$290Average$496FlexibilityNo cancel feeOn-time69%

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