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Cheap flights from Buffalo to San Juan from C$ 145

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Buffalo to San Juan departing on 3/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from Buffalo to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:00 a.m. - 1:25 p.m.
BUF
-
SJU
7h 25m
1 stop
Delta Logo
1:25 p.m. - 12:50 a.m.
SJU
-
BUF
11h 25m
1 stop
C$ 318Delta
Tue, 14 Apr - Thu, 30 Apr
United Airlines Logo
11:02 a.m. - 9:24 p.m.
BUF
-
SJU
10h 22m
2 stops
United Airlines Logo
1:00 a.m. - 9:50 a.m.
SJU
-
BUF
8h 50m
1 stop
C$ 368United Airlines
Sat, 2 May - Wed, 6 May
United Airlines Logo
10:50 a.m. - 8:34 p.m.
BUF
-
SJU
9h 44m
1 stop
United Airlines Logo
1:00 a.m. - 10:00 a.m.
SJU
-
BUF
9h 00m
2 stops
C$ 387United Airlines
Sun, 12 Apr - Wed, 15 Apr
Delta Logo
2:34 p.m. - 11:59 p.m.
BUF
-
SJU
9h 25m
1 stop
Delta Logo
5:42 p.m. - 12:50 a.m.
SJU
-
BUF
7h 08m
1 stop
C$ 395Delta
Tue, 14 Apr - Fri, 1 May
United Airlines Logo
6:09 a.m. - 12:34 p.m.
BUF
-
SJU
6h 25m
1 stop
United Airlines Logo
1:00 a.m. - 1:13 p.m.
SJU
-
BUF
12h 13m
2 stops
C$ 406United Airlines
Sun, 12 Apr - Wed, 15 Apr
Southwest Logo
4:00 p.m. - 11:40 p.m.
BUF
-
SJU
7h 40m
1 stop
Southwest Logo
5:35 a.m. - 4:40 p.m.
SJU
-
BUF
11h 05m
1 stop
C$ 408Southwest
Fri, 24 Apr - Thu, 30 Apr
United Airlines Logo
11:02 a.m. - 9:24 p.m.
BUF
-
SJU
10h 22m
2 stops
United Airlines Logo
7:20 a.m. - 2:10 p.m.
SJU
-
BUF
6h 50m
1 stop
C$ 416United Airlines
Thu, 30 Apr - Tue, 5 May
Southwest Logo
5:00 p.m. - 11:15 p.m.
BUF
-
SJU
6h 15m
1 stop
Southwest Logo
5:35 a.m. - 3:20 p.m.
SJU
-
BUF
9h 45m
2 stops
C$ 421Southwest
Sat, 2 May - Wed, 6 May
Delta Logo
12:09 p.m. - 11:13 p.m.
BUF
-
SJU
11h 04m
1 stop
Delta Logo
2:35 p.m. - 10:54 p.m.
SJU
-
BUF
8h 19m
1 stop
C$ 429Delta
Tue, 5 May - Sat, 9 May
JetBlue Logo
7:20 a.m. - 11:14 a.m.
BUF
-
SJU
3h 54mdirect
JetBlue Logo
6:15 p.m. - 11:04 p.m.
SJU
-
BUF
4h 49mdirect
C$ 432JetBlue
Wed, 29 Apr - Wed, 20 May

Southwest flights from Buffalo to San Juan Luis Munoz Marin Intl Airport

Our best Southwest deals on Buffalo to San Juan Luis Munoz Marin Intl Airport flight tickets
Southwest
24 Apr
BUF4:00 p.m.Buffalo
7h 40m
1 stop
SJU11:40 p.m.San Juan Luis Munoz Marin Intl
30 Apr
SJU5:35 a.m.San Juan Luis Munoz Marin Intl
11h 05m
1 stop
BUF4:40 p.m.Buffalo
C$ 408
Southwest
2 May
BUF5:00 p.m.Buffalo
6h 15m
1 stop
SJU11:15 p.m.San Juan Luis Munoz Marin Intl
6 May
SJU5:35 a.m.San Juan Luis Munoz Marin Intl
9h 45m
2 stops
BUF3:20 p.m.Buffalo
C$ 421
Southwest
7 Sep
BUF11:25 a.m.Buffalo
10h 50m
2 stops
SJU10:15 p.m.San Juan Luis Munoz Marin Intl
11 Sep
SJU2:35 p.m.San Juan Luis Munoz Marin Intl
8h 05m
1 stop
BUF10:40 p.m.Buffalo
C$ 478

United Airlines flights from Buffalo to San Juan Luis Munoz Marin Intl Airport

Our best United Airlines deals on Buffalo to San Juan Luis Munoz Marin Intl Airport flight tickets
United Airlines
2 May
BUF11:02 a.m.Buffalo
10h 22m
2 stops
SJU9:24 p.m.San Juan Luis Munoz Marin Intl
6 May
SJU1:00 a.m.San Juan Luis Munoz Marin Intl
8h 50m
1 stop
BUF9:50 a.m.Buffalo
C$ 368
United Airlines
12 Apr
BUF10:50 a.m.Buffalo
9h 44m
1 stop
SJU8:34 p.m.San Juan Luis Munoz Marin Intl
15 Apr
SJU1:00 a.m.San Juan Luis Munoz Marin Intl
9h 00m
2 stops
BUF10:00 a.m.Buffalo
C$ 387
United Airlines
12 Apr
BUF6:09 a.m.Buffalo
6h 25m
1 stop
SJU12:34 p.m.San Juan Luis Munoz Marin Intl
15 Apr
SJU1:00 a.m.San Juan Luis Munoz Marin Intl
12h 13m
2 stops
BUF1:13 p.m.Buffalo
C$ 406

momondo Fare Finder

 
Customize your flight search to find flights from Buffalo to San Juan Luis Munoz Marin Intl Airport 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, momondo users made 96,600 searches. Data last updated 23 March 2026.
Use the filters below to find and compare flights from Buffalo to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 14/4

6:00 a.m.-1:25 p.m.

1 stop7h 25m

San Juan Luis Munoz Marin Intl

Thu 30/4

1:25 p.m.-12:50 a.m.

1 stop11h 25m

C$ 318

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 2/5

11:02 a.m.-9:24 p.m.

2 stops10h 22m

San Juan Luis Munoz Marin Intl

Wed 6/5

1:00 a.m.-9:50 a.m.

1 stop8h 50m

C$ 368

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sun 12/4

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

1 stop9h 44m

San Juan Luis Munoz Marin Intl

Wed 15/4

1:00 a.m.-10:00 a.m.

2 stops9h 00m

C$ 387

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 14/4

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

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Fri 1/5

5:42 p.m.-12:50 a.m.

1 stop7h 08m

C$ 395

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sun 12/4

6:09 a.m.-12:34 p.m.

1 stop6h 25m

San Juan Luis Munoz Marin Intl

Wed 15/4

1:00 a.m.-1:13 p.m.

2 stops12h 13m

C$ 406

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Fri 24/4

4:00 p.m.-11:40 p.m.

1 stop7h 40m

San Juan Luis Munoz Marin Intl

Thu 30/4

5:35 a.m.-4:40 p.m.

1 stop11h 05m

C$ 408

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Thu 30/4

11:02 a.m.-9:24 p.m.

2 stops10h 22m

San Juan Luis Munoz Marin Intl

Tue 5/5

7:20 a.m.-2:10 p.m.

1 stop6h 50m

C$ 416

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Sat 2/5

5:00 p.m.-11:15 p.m.

1 stop6h 15m

San Juan Luis Munoz Marin Intl

Wed 6/5

5:35 a.m.-3:20 p.m.

2 stops9h 45m

C$ 421

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Tue 5/5

12:09 p.m.-11:13 p.m.

1 stop11h 04m

San Juan Luis Munoz Marin Intl

Sat 9/5

2:35 p.m.-10:54 p.m.

1 stop8h 19m

C$ 429
Quickest round-trip

BuffaloSan Juan

BUF - SJU

BUFSJU

Buffalo

Wed 29/4

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

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Wed 20/5

6:15 p.m.-11:04 p.m.

Nonstop4h 49m

C$ 432

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Buffalo to San Juan Luis Munoz Marin Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

The month of September is, on average, the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport from Buffalo, with most prices found around C$ 375. If you don’t want to visit San Juan Luis Munoz Marin Intl Airport in September, then you should wait until May to fly from Buffalo, when ticket prices are also cheap, with an average price of C$ 399.

What is the cheapest day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

The cheapest day to depart on your flight to San Juan Luis Munoz Marin Intl Airport is on a Wednesday when prices can be found for as low as C$ 475. This is often the case because there is less demand to fly during this day of the week. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Buffalo to San Juan Luis Munoz Marin Intl Airport for around C$ 586.

What is the cheapest Buffalo to San Juan Luis Munoz Marin Intl flight route?

Fly from Buffalo to San Juan Luis Munoz Marin Intl for the best Buffalo - San Juan Luis Munoz Marin Intl flight prices

How far in advance should I book a flight to San Juan Luis Munoz Marin Intl Airport?

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from Buffalo when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around C$ 519 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan Luis Munoz Marin Intl Airport from Buffalo for as low as C$ 395 on momondo.

What cabin class options are available on Buffalo to San Juan Luis Munoz Marin Intl flights?

There is only 1 cabin class available to choose from on Buffalo to San Juan Luis Munoz Marin Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Buffalo to San Juan Luis Munoz Marin Intl Airport flights?

You could potentially save up to 20% on your flight if you consider stops on a Buffalo to San Juan Luis Munoz Marin Intl Airport flight.

How have Buffalo to San Juan Luis Munoz Marin Intl Airport flight prices changed over time?

As of March 2026, prices for Buffalo to San Juan Luis Munoz Marin Intl Airport flights are approximately 11% cheaper when compared to flights at the same time last year.

When to book flights from Buffalo to San Juan Luis Munoz Marin Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Buffalo to San Juan Luis Munoz Marin Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Buffalo to San Juan Luis Munoz Marin Intl Airport (BUF to SJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Buffalo to San Juan Luis Munoz Marin Intl Airport

Best price found

C$ 405

Fastest flight time

3h 55m

Direct flights

Tue, Thu, Sat and Sun
The best flight deal from Buffalo to San Juan Luis Munoz Marin Intl Airport found on momondo in the last 72 hours is C$ 405
The fastest flight from Buffalo to San Juan Luis Munoz Marin Intl Airport takes 3h 55m
Direct flights go from Buffalo to San Juan Luis Munoz Marin Intl Airport on Tuesday, Thursday, Saturday and Sunday. There are no airlines offering direct flights.
Search flight deals

  • How far is Buffalo to San Juan Luis Munoz Marin Intl by plane?

    San Juan Luis Munoz Marin Intl is 2974.1 km away from Buffalo. Typically, this will take 3h 55m by plane in normal conditions.

  • When did momondo last update prices for flights from Buffalo Airport to San Juan Luis Munoz Marin Intl Airport?

    Prices for flights from Buffalo Airport to San Juan Luis Munoz Marin Intl Airport were last updated today.

  • How many operators does momondo search for flights from Buffalo Airport to San Juan Luis Munoz Marin Intl Airport?

  • How old do you have to be to fly from Buffalo Airport to San Juan Luis Munoz Marin Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Buffalo Airport to San Juan Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

    The travel and health documents you'll need for your trip to San Juan Luis Munoz Marin Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Juan Luis Munoz Marin Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Buffalo to San Juan Luis Munoz Marin Intl Airport?

  • What is the most popular airline from Buffalo to San Juan Luis Munoz Marin Intl Airport?

Best airlines flying from Buffalo to San Juan Luis Munoz Marin Intl Airport

Compare and see reviews for airlines that fly from Buffalo to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom C$ 172Free CancellationRating
7.9
8,318 reviews
Search Delta flights
American AirlinesPriceFrom C$ 200Free CancellationRating
7.1
11,486 reviews
Search American Airlines flights
FrontierPriceFrom C$ 236Free CancellationRating
5.7
3,020 reviews
Search Frontier flights
JetBluePriceFrom C$ 292Free CancellationRating
7.2
2,908 reviews
Search JetBlue flights
SouthwestPriceFrom C$ 309Free CancellationRating
8.0
4,324 reviews
Search Southwest flights

Travelling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Carolina
Rio Grande
Humacao
Dorado

Why use momondo?

Why should I use momondo to find a flight deal from Buffalo to San Juan?

Finding the right flight to San Juan from Buffalo is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Juan quick and easy, saving you time and money.

Can I find flights from Buffalo to San Juan with flexible booking policies on momondo?

momondo does allow users to show only those flights to San Juan from Buffalo which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Buffalo to San Juan?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Juan from Buffalo.

I’m not ready to book a flight from Buffalo to San Juan right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Buffalo to San Juan flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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