$144+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — SJU
Jul 23 — Jul 301
Round-trip
1 adult, Economy
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Find cheap flights from Buffalo to San Juan with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Buffalo to San Juan are usually found in September or March, booked 88 days in advance, depart on a Thursday or Wednesday and return on a Tuesday
Cheap flight deals from Buffalo to San Juan
Cheapest
Best
Last-minute
One-way
Cheapest flights from Buffalo to San JuanExplore 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 June 23, 2026.
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 June 23, 2026.
This American Airlines deal was found by Cheapflights users on 6/21. 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 9/110:26 am
BUF
- SJU
2 stops11h 58m
American Airlines
Sat 9/57:03 am
SJU
- BUF
1 stop7h 53m
American Airlines
Deal found 6/21![American Airlines logo]()
$295
This Southwest deal was found by Cheapflights users on 6/21. 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.
Fri 9/2511:25 am
BUF
- SJU
2 stops10h 45m
Southwest
Wed 10/215:35 am
SJU
- BUF
1 stop7h 45m
Southwest
Deal found 6/21![Southwest logo]()
$306
This Cheapflightsfares deal was found by Cheapflights users on 6/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:00 am
BUF
- SJU
Nonstop4h 38m
JetBlue
Fri 8/146:29 pm
SJU
- BUF
Nonstop4h 38m
JetBlue
Deal found 6/21![JetBlue logo]()
$307
This United Airlines deal was found by Cheapflights users on 6/23. 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 10/77:00 am
BUF
- SJU
2 stops13h 38m
United Airlines
Tue 10/131:00 am
SJU
- BUF
2 stops13h 23m
United Airlines
Deal found 6/23![United Airlines logo]()
$314
This JetBlue deal was found by Cheapflights users on 6/23. 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.
Mon 10/58:00 am
BUF
- SJU
Nonstop4h 33m
JetBlue
Fri 10/166:15 pm
SJU
- BUF
Nonstop4h 35m
JetBlue
Deal found 6/23![JetBlue logo]()
$315
This Southwest deal was found by Cheapflights users on 6/20. 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 10/103:45 pm
BUF
- SJU
1 stop6h 20m
Southwest
Tue 10/135:35 am
SJU
- BUF
1 stop7h 45m
Southwest
Deal found 6/20![Southwest logo]()
$322
This Delta deal was found by Cheapflights users on 6/23. 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.
Sun 9/66:05 am
BUF
- SJU
1 stop10h 33m
Delta
Sat 9/123:10 pm
SJU
- BUF
1 stop7h 26m
Delta
Deal found 6/23![Delta logo]()
$324
This CheapOair deal was found by Cheapflights users on 6/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:40 am
BUF
- SJU
1 stop14h 33m
Multiple Airlines
Wed 10/214:39 pm
SJU
- BUF
1 stop17h 09m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$325
This Frontier deal was found by Cheapflights users on 6/20. 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.
Tue 9/19:29 pm
BUF
- SJU
1 stop13h 37m
Frontier
Wed 9/28:57 pm
SJU
- BUF
1 stop12h 26m
Frontier
Deal found 6/20![Frontier logo]()
$331
This Cheapflightsfares deal was found by Cheapflights users on 6/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:00 am
BUF
- SJU
Nonstop4h 40m
JetBlue
Wed 8/126:29 pm
SJU
- BUF
Nonstop4h 38m
JetBlue
Deal found 6/23![JetBlue logo]()
$332
This CheapOair deal was found by Cheapflights users on 6/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:40 am
BUF
- SJU
1 stop14h 33m
JetBlue
Wed 10/216:15 pm
SJU
- BUF
Nonstop4h 35m
JetBlue
Deal found 6/21![JetBlue logo]()
$334
This American Airlines deal was found by Cheapflights users on 6/21. 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 8/286:50 am
BUF
- SJU
1 stop17h 09m
American Airlines
Mon 8/317:30 am
SJU
- BUF
1 stop10h 32m
American Airlines
Deal found 6/21![American Airlines logo]()
$335
Best flights from Buffalo to San JuanDiscover carefully curated flight deals from Buffalo to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 23, 2026.
Discover carefully curated flight deals from Buffalo to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 23, 2026.
This Southwest deal was found by Cheapflights users on 6/22. 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 12/712:45 pm
BUF
- SJU
2 stops8h 30m
Southwest
Fri 12/116:35 am
SJU
- BUF
1 stop6h 25m
Southwest
Deal found 6/22![Southwest logo]()
$306
This Delta deal was found by Cheapflights users on 6/23. 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 11/124:00 pm
BUF
- SJU
1 stop6h 55m
Delta
Mon 11/167:15 am
SJU
- BUF
1 stop9h 21m
Delta
Deal found 6/23![Delta logo]()
$324
This JetBlue deal was found by Cheapflights users on 6/18. 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 9/16:35 am
BUF
- SJU
1 stop7h 23m
JetBlue
Wed 9/26:20 pm
SJU
- BUF
Nonstop4h 38m
JetBlue
Deal found 6/18![JetBlue logo]()
$366
This Southwest deal was found by Cheapflights users on 6/20. 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 10/103:45 pm
BUF
- SJU
2 stops8h 05m
Southwest
Tue 10/135:35 am
SJU
- BUF
2 stops9h 15m
Southwest
Deal found 6/20![Southwest logo]()
$322
This Delta deal was found by Cheapflights users on 6/22. 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.
Sun 9/66:05 am
BUF
- SJU
1 stop10h 33m
Delta
Sat 9/123:10 pm
SJU
- BUF
1 stop7h 26m
Delta
Deal found 6/22![Delta logo]()
$324
This Southwest deal was found by Cheapflights users on 6/19. 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.
Thu 10/83:10 pm
BUF
- SJU
1 stop8h 00m
Southwest
Mon 10/125:20 pm
SJU
- BUF
1 stop6h 50m
Southwest
Deal found 6/19![Southwest logo]()
$347
This Delta deal was found by Cheapflights users on 6/18. 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 11/139:55 am
BUF
- SJU
1 stop6h 25m
Delta
Tue 11/177:15 am
SJU
- BUF
1 stop9h 21m
Delta
Deal found 6/18![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 6/18. 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.
Thu 10/15:45 pm
BUF
- SJU
1 stop6h 50m
Southwest
Sun 10/115:30 am
SJU
- BUF
2 stops8h 40m
Southwest
Deal found 6/18![Southwest logo]()
$358
This Delta deal was found by Cheapflights users on 6/23. 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 8/76:27 am
BUF
- SJU
1 stop6h 49m
Delta
Fri 8/1412:56 pm
SJU
- BUF
1 stop11h 03m
Delta
Deal found 6/23![Delta logo]()
$369
This Southwest deal was found by Cheapflights users on 6/23. 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.
Thu 11/125:30 pm
BUF
- SJU
1 stop6h 35m
Southwest
Mon 11/166:45 am
SJU
- BUF
1 stop10h 35m
Southwest
Deal found 6/23![Southwest logo]()
$394
Last-minute flights from Buffalo to San JuanDiscover last-minute flight deals from Buffalo to San Juan. Data last updated June 23, 2026 and is based on user searches.
Discover last-minute flight deals from Buffalo to San Juan. Data last updated June 23, 2026 and is based on user searches.
This JetBlue deal was found by Cheapflights users on 6/21. 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.
Sat 6/277:00 am
BUF
- SJU
Nonstop4h 43m
JetBlue
Wed 7/16:20 pm
SJU
- BUF
Nonstop4h 38m
JetBlue
Deal found 6/21![JetBlue logo]()
$345
This SmartFares deal was found by Cheapflights users on 6/20. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:00 am
BUF
- SJU
Nonstop4h 43m
JetBlue
Sat 7/116:29 pm
SJU
- BUF
Nonstop4h 38m
JetBlue
Deal found 6/20![JetBlue logo]()
$325
This Cheapflightsfares deal was found by Cheapflights users on 6/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/67:00 am
BUF
- SJU
Nonstop4h 35m
JetBlue
Mon 7/136:29 pm
SJU
- BUF
Nonstop4h 38m
JetBlue
Deal found 6/21![JetBlue logo]()
$352
This Cheapflightsfares deal was found by Cheapflights users on 6/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/117:00 am
BUF
- SJU
Nonstop4h 38m
JetBlue
Mon 7/136:29 pm
SJU
- BUF
Nonstop4h 38m
JetBlue
Deal found 6/20![JetBlue logo]()
$332
This Expedia deal was found by Cheapflights users on 6/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1110:02 pm
BUF
- SJU
1 stop12h 41m
Multiple Airlines
Mon 7/136:29 pm
SJU
- BUF
Nonstop4h 38m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$350
This Priceline deal was found by Cheapflights users on 6/20. 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.
Tue 7/149:09 pm
BUF
- SJU
1 stop14h 07m
Frontier
Fri 8/146:09 pm
SJU
- BUF
1 stop26h 58m
Frontier
Deal found 6/20![Frontier logo]()
$356
This Super.com deal was found by Cheapflights users on 6/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/223:55 pm
BUF
- SJU
1 stop8h 18m
JetBlue
Wed 8/56:29 pm
SJU
- BUF
Nonstop4h 38m
JetBlue
Deal found 6/19![JetBlue logo]()
$347
This Frontier deal was found by Cheapflights users on 6/21. 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.
Wed 7/297:57 pm
BUF
- SJU
1 stop12h 00m
Frontier
Wed 8/512:13 pm
SJU
- BUF
1 stop6h 53m
Frontier
Deal found 6/21![Frontier logo]()
$336
This Expedia deal was found by Cheapflights users on 6/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/297:57 pm
BUF
- SJU
1 stop14h 46m
Multiple Airlines
Wed 8/56:00 am
SJU
- BUF
2 stops18h 25m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$338
This Priceline deal was found by Cheapflights users on 6/22. 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.
Wed 7/297:57 pm
BUF
- SJU
1 stop14h 46m
Frontier
Mon 8/36:09 pm
SJU
- BUF
1 stop24h 57m
Frontier
Deal found 6/22![Frontier logo]()
$355
One-way flights from Buffalo to San JuanSearch for one-way flight options from Buffalo to San Juan. Find affordable one-way fares based on user searches. Data last updated June 23, 2026.
Search for one-way flight options from Buffalo to San Juan. Find affordable one-way fares based on user searches. Data last updated June 23, 2026.
This American Airlines deal was found by Cheapflights users on 6/21. 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 8/186:14 am
BUF
- SJU
2 stops12h 20m
American Airlines
Deal found 6/21![American Airlines logo]()
$144
This American Airlines deal was found by Cheapflights users on 6/20. 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.
Wed 8/194:49 pm
BUF
- SJU
1 stop7h 10m
American Airlines
Deal found 6/20![American Airlines logo]()
$149
This American Airlines deal was found by Cheapflights users on 6/21. 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.
Sun 9/205:56 pm
BUF
- SJU
2 stops20h 54m
American Airlines
Deal found 6/21![American Airlines logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2111:29 am
BUF
- SJU
2 stops13h 12m
Frontier
Deal found 6/21![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/172:48 pm
BUF
- SJU
2 stops33h 53m
Frontier
Deal found 6/19![Frontier logo]()
$156
This Cheapflightsfares deal was found by Cheapflights users on 6/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/147:00 am
BUF
- SJU
Nonstop4h 33m
JetBlue
Deal found 6/20![JetBlue logo]()
$160
This Southwest deal was found by Cheapflights users on 6/22. 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.
Thu 8/133:55 pm
BUF
- SJU
1 stop6h 55m
Southwest
Deal found 6/22![Southwest logo]()
$161
This Super.com deal was found by Cheapflights users on 6/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:09 pm
BUF
- SJU
1 stop14h 07m
Frontier
Deal found 6/19![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:09 pm
BUF
- SJU
1 stop22h 33m
Frontier
Deal found 6/20![Frontier logo]()
$166
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 June 23, 2026.
Round-trip from | $295 (American Airlines) |
|---|---|
One-way from | $144 (American Airlines) |
Popular in | December |
Cheapest in | September |
Average price | $375 |
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 June 23, 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
Cheapest round-trip
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Mon 12/7
12:45 pm-10:15 pm
2 stops8h 30m
San Juan Luis Munoz Marin Intl
Fri 12/11
6:35 am-12:00 pm
1 stop6h 25m
$306
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Sat 10/10
3:45 pm-11:50 pm
2 stops8h 05m
San Juan Luis Munoz Marin Intl
Tue 10/13
5:35 am-2:50 pm
2 stops9h 15m
$322
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Thu 11/12
4:00 pm-11:55 pm
1 stop6h 55m
San Juan Luis Munoz Marin Intl
Mon 11/16
7:15 am-3:36 pm
1 stop9h 21m
$324
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Sun 9/6
6:05 am-4:38 pm
1 stop10h 33m
San Juan Luis Munoz Marin Intl
Sat 9/12
3:10 pm-10:36 pm
1 stop7h 26m
$324
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Thu 10/8
3:10 pm-11:10 pm
1 stop8h 00m
San Juan Luis Munoz Marin Intl
Mon 10/12
5:20 pm-12:10 am
1 stop6h 50m
$347
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Thu 10/1
5:45 pm-12:35 am
1 stop6h 50m
San Juan Luis Munoz Marin Intl
Sun 10/11
5:30 am-2:10 pm
2 stops8h 40m
$358
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Fri 11/13
9:55 am-5:20 pm
1 stop6h 25m
San Juan Luis Munoz Marin Intl
Tue 11/17
7:15 am-3:36 pm
1 stop9h 21m
$359
Quickest round-trip
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Tue 9/1
6:35 am-1:58 pm
1 stop7h 23m
San Juan Luis Munoz Marin Intl
Wed 9/2
6:20 pm-10:58 pm
Nonstop4h 38m
$366
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Fri 8/7
6:27 am-1:16 pm
1 stop6h 49m
San Juan Luis Munoz Marin Intl
Fri 8/14
12:56 pm-11:59 pm
1 stop11h 03m
$369
BuffaloSan Juan
BUF - SJU
BUFSJU
Buffalo
Thu 11/12
5:30 pm-1:05 am
1 stop6h 35m
San Juan Luis Munoz Marin Intl
Mon 11/16
6:45 am-4:20 pm
1 stop10h 35m
$394
Showing 1-10 of 21 resultsSorted by cheapest first
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.
BUF-PR1
BUF-SJU
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
BUF-PR1
BUF-SJU
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 $93). Flying from Buffalo to San Juan in June is currently the most expensive (average of $231). 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 June 23, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Buffalo to San Juan as you normally would.
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?
To ensure you get the cheapest price possible for a flight from Buffalo to San Juan, you should look to book at least 87 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.
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 June 23, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andAmerican 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.
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
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.
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Alternative routes for Buffalo to San Juan
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Complete your trip
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Buffalo and San Juan flights
Browse other Buffalo and San Juan flight options. Last updated on June 23, 2026.
Other flights from Buffalo
Browse through other flights departing from Buffalo. Flights are based on user searches made on Cheapflights and were last updated on June 23, 2026.
Popular flight searches
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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 June 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$106 | Average$318 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$129 | Average$277 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$208 | Average$518 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$211 | Average$474 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$225 | Average$386 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$231 | Average$452 | FlexibilityNo cancel fee | On-time71% |