$147+ Cheap flights from Boston (BOS) 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 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Jun 24 — Jul 11
Round-trip
1 adult, Economy
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Find cheap flights from Boston 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 Boston Logan Intl to San Juan are usually found in January or October, booked 47 days in advance, depart on a Wednesday or Sunday and return on a Friday
Cheap flight deals from Boston to San Juan
Cheapest
Best
Last-minute
One-way
Cheapest flights from Boston to San JuanExplore the most affordable flight options available from Boston to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 25, 2026.
Explore the most affordable flight options available from Boston to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 25, 2026.
This SmartFares deal was found by Cheapflights users on 5/21. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/66:10 pm
BOS
- SJU
Nonstop4h 02m
JetBlue
Fri 6/125:54 pm
SJU
- BOS
Nonstop4h 07m
JetBlue
Deal found 5/21![JetBlue logo]()
$274
This SmartFares deal was found by Cheapflights users on 5/23. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:55 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Tue 9/88:50 pm
SJU
- BOS
Nonstop4h 05m
JetBlue
Deal found 5/23![JetBlue logo]()
$288
This Cheapflightsfares deal was found by Cheapflights users on 5/24. 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.
Sun 6/149:44 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Thu 6/186:00 am
SJU
- BOS
Nonstop4h 07m
JetBlue
Deal found 5/24![JetBlue logo]()
$298
This Super.com deal was found by Cheapflights users on 5/23. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:15 am
BOS
- SJU
Nonstop3h 58m
JetBlue
Wed 11/187:00 am
SJU
- BOS
Nonstop4h 13m
JetBlue
Deal found 5/23![JetBlue logo]()
$302
This Delta deal was found by Cheapflights users on 5/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:15 am
BOS
- SJU
Nonstop4h 05m
Delta
Fri 10/301:32 pm
SJU
- BOS
Nonstop4h 13m
Delta
Deal found 5/20![Delta logo]()
$303
This Delta deal was found by Cheapflights users on 5/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/238:50 am
BOS
- SJU
Nonstop4h 07m
Delta
Wed 9/21:06 pm
SJU
- BOS
1 stop12h 00m
Delta
Deal found 5/20![Delta logo]()
$308
This Delta deal was found by Cheapflights users on 5/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:05 am
BOS
- SJU
1 stop7h 28m
Delta
Thu 8/137:30 am
SJU
- BOS
1 stop8h 43m
Delta
Deal found 5/20![Delta logo]()
$312
This American Airlines deal was found by Cheapflights users on 5/24. 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 8/129:31 am
BOS
- SJU
1 stop12h 53m
American Airlines
Tue 8/187:00 am
SJU
- BOS
1 stop7h 26m
American Airlines
Deal found 5/24![American Airlines logo]()
$317
This Cheapflightsfares deal was found by Cheapflights users on 5/20. 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.
Mon 9/1410:15 am
BOS
- SJU
Nonstop4h 08m
JetBlue
Wed 9/167:35 pm
SJU
- BOS
Nonstop4h 08m
JetBlue
Deal found 5/20![JetBlue logo]()
$318
This American Airlines deal was found by Cheapflights users on 5/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:03 am
BOS
- SJU
1 stop14h 54m
American Airlines
Wed 8/57:14 pm
SJU
- BOS
1 stop15h 05m
American Airlines
Deal found 5/23![American Airlines logo]()
$320
Best flights from Boston to San JuanDiscover carefully curated flight deals from Boston to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 25, 2026.
Discover carefully curated flight deals from Boston to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 25, 2026.
This Delta deal was found by Cheapflights users on 5/24. 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 11/88:15 am
BOS
- SJU
Nonstop4h 06m
Delta
Thu 11/127:15 am
SJU
- BOS
1 stop9h 07m
Delta
Deal found 5/24![Delta logo]()
$308
This JetBlue deal was found by Cheapflights users on 5/20. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:55 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Tue 9/84:55 pm
SJU
- BOS
1 stop7h 47m
JetBlue
Deal found 5/20![JetBlue logo]()
$342
This United Airlines deal was found by Cheapflights users on 5/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:35 pm
BOS
- SJU
1 stop11h 54m
United Airlines
Wed 7/81:00 am
SJU
- BOS
1 stop7h 17m
United Airlines
Deal found 5/22![United Airlines logo]()
$378
This Delta deal was found by Cheapflights users on 5/24. 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 9/49:05 am
BOS
- SJU
1 stop7h 28m
Delta
Mon 9/77:30 am
SJU
- BOS
1 stop8h 43m
Delta
Deal found 5/24![Delta logo]()
$312
This Delta deal was found by Cheapflights users on 5/23. 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.
Wed 9/166:05 am
BOS
- SJU
1 stop6h 08m
Delta
Tue 9/227:00 am
SJU
- BOS
1 stop7h 52m
Delta
Deal found 5/23![Delta logo]()
$312
This Delta deal was found by Cheapflights users on 5/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:05 am
BOS
- SJU
1 stop7h 28m
Delta
Sun 8/301:19 pm
SJU
- BOS
1 stop9h 49m
Delta
Deal found 5/21![Delta logo]()
$312
This Delta deal was found by Cheapflights users on 5/24. 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 9/118:00 am
BOS
- SJU
1 stop8h 31m
Delta
Wed 9/165:41 pm
SJU
- BOS
1 stop7h 36m
Delta
Deal found 5/24![Delta logo]()
$312
This Delta deal was found by Cheapflights users on 5/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/308:50 am
BOS
- SJU
Nonstop4h 03m
Delta
Tue 8/115:49 pm
SJU
- BOS
1 stop7h 36m
Delta
Deal found 5/21![Delta logo]()
$348
This Delta deal was found by Cheapflights users on 5/24. 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 8/38:50 am
BOS
- SJU
Nonstop4h 07m
Delta
Mon 8/107:30 am
SJU
- BOS
1 stop8h 43m
Delta
Deal found 5/24![Delta logo]()
$348
This Delta deal was found by Cheapflights users on 5/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:30 am
BOS
- SJU
1 stop7h 41m
Delta
Tue 8/115:49 pm
SJU
- BOS
1 stop7h 36m
Delta
Deal found 5/20![Delta logo]()
$352
This Delta deal was found by Cheapflights users on 5/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:05 am
BOS
- SJU
1 stop7h 28m
Delta
Sat 8/295:49 pm
SJU
- BOS
1 stop7h 36m
Delta
Deal found 5/21![Delta logo]()
$352
This Delta deal was found by Cheapflights users on 5/22. 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.
Fri 9/258:15 am
BOS
- SJU
Nonstop4h 05m
Delta
Tue 9/291:30 pm
SJU
- BOS
Nonstop4h 05m
Delta
Deal found 5/22![Delta logo]()
$384
Last-minute flights from Boston to San JuanDiscover last-minute flight deals from Boston to San Juan. Data last updated May 25, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to San Juan. Data last updated May 25, 2026 and is based on user searches.
This SmartFares deal was found by Cheapflights users on 5/20. 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.
Wed 6/35:40 pm
BOS
- SJU
Nonstop4h 02m
JetBlue
Sat 6/67:30 am
SJU
- BOS
Nonstop4h 05m
JetBlue
Deal found 5/20![JetBlue logo]()
$328
This SmartFares deal was found by Cheapflights users on 5/21. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/66:10 pm
BOS
- SJU
Nonstop4h 02m
JetBlue
Fri 6/125:54 pm
SJU
- BOS
Nonstop4h 07m
JetBlue
Deal found 5/21![JetBlue logo]()
$274
This Delta deal was found by Cheapflights users on 5/23. 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.
Sat 6/66:00 am
BOS
- SJU
1 stop10h 29m
Delta
Thu 6/112:05 pm
SJU
- BOS
Nonstop4h 09m
Delta
Deal found 5/23![Delta logo]()
$308
This United Airlines deal was found by Cheapflights users on 5/23. 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.
Sat 6/64:05 pm
BOS
- SJU
1 stop7h 45m
United Airlines
Wed 6/101:00 am
SJU
- BOS
1 stop7h 17m
United Airlines
Deal found 5/23![United Airlines logo]()
$312
This Cheapflightsfares deal was found by Cheapflights users on 5/24. 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.
Tue 6/95:40 pm
BOS
- SJU
Nonstop4h 02m
JetBlue
Fri 6/126:18 pm
SJU
- BOS
Nonstop4h 07m
JetBlue
Deal found 5/24![JetBlue logo]()
$338
This JetBlue deal was found by Cheapflights users on 5/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/139:44 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Thu 6/188:30 am
SJU
- BOS
Nonstop4h 03m
JetBlue
Deal found 5/22![JetBlue logo]()
$303
This Cheapflightsfares deal was found by Cheapflights users on 5/24. 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.
Sun 6/149:44 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Thu 6/186:00 am
SJU
- BOS
Nonstop4h 07m
JetBlue
Deal found 5/24![JetBlue logo]()
$298
This Cheapflightsfares deal was found by Cheapflights users on 5/23. 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.
Sun 6/149:44 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Sat 6/207:50 am
SJU
- BOS
1 stop9h 32m
JetBlue
Deal found 5/23![JetBlue logo]()
$337
This JetBlue deal was found by Cheapflights users on 5/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/159:44 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Wed 6/179:11 pm
SJU
- BOS
Nonstop4h 05m
JetBlue
Deal found 5/22![JetBlue logo]()
$323
One-way flights from Boston to San JuanSearch for one-way flight options from Boston to San Juan. Find affordable one-way fares based on user searches. Data last updated May 25, 2026.
Search for one-way flight options from Boston to San Juan. Find affordable one-way fares based on user searches. Data last updated May 25, 2026.
This SmartFares deal was found by Cheapflights users on 5/23. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/149:44 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Deal found 5/23![JetBlue logo]()
$147
This Southwest deal was found by Cheapflights users on 5/24. 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.
Tue 8/111:20 pm
BOS
- SJU
1 stop8h 40m
Southwest
Deal found 5/24![Southwest logo]()
$156
This Cheapflightsfares deal was found by Cheapflights users on 5/24. 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 9/49:55 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Deal found 5/24![JetBlue logo]()
$157
This Delta deal was found by Cheapflights users on 5/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:13 am
BOS
- SJU
Nonstop4h 07m
Delta
Deal found 5/20![Delta logo]()
$162
This Delta deal was found by Cheapflights users on 5/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/149:05 am
BOS
- SJU
1 stop7h 28m
Delta
Deal found 5/20![Delta logo]()
$166
This Frontier deal was found by Cheapflights users on 5/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1410:04 am
BOS
- SJU
1 stop9h 38m
Frontier
Deal found 5/22![Frontier logo]()
$168
This Super.com deal was found by Cheapflights users on 5/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:40 pm
BOS
- SJU
Nonstop4h 02m
JetBlue
Deal found 5/21![JetBlue logo]()
$169
This American Airlines deal was found by Cheapflights users on 5/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/298:14 am
BOS
- SJU
1 stop14h 46m
American Airlines
Deal found 5/23![American Airlines logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 5/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:04 am
BOS
- SJU
1 stop9h 38m
Frontier
Deal found 5/23![Frontier logo]()
$175
This SmartFares deal was found by Cheapflights users on 5/23. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/84:29 pm
BOS
- SJU
1 stop7h 28m
JetBlue
Deal found 5/23![JetBlue logo]()
$176
This Jetabroad deal was found by Cheapflights users on 5/24. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:00 am
BOS
- SJU
Nonstop4h 00m
JetBlue
Deal found 5/24![JetBlue logo]()
$178
Find flight deals from Boston to San Juan
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) 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 May 25, 2026.
Round-trip from | $274 (SmartFares) |
|---|---|
One-way from | $147 (SmartFares) |
Popular in | December |
Cheapest in | January |
Average price | $352 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boston 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 May 25, 2026.
Use the filters below to find and compare flights from Boston to San Juan that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sun 11/8
8:15 am-1:21 pm
Nonstop4h 06m
San Juan Luis Munoz Marin Intl
Thu 11/12
7:15 am-3:22 pm
1 stop9h 07m
$308
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Fri 9/4
9:05 am-4:33 pm
1 stop7h 28m
San Juan Luis Munoz Marin Intl
Mon 9/7
7:30 am-4:13 pm
1 stop8h 43m
$312
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Wed 9/16
6:05 am-12:13 pm
1 stop6h 08m
San Juan Luis Munoz Marin Intl
Tue 9/22
7:00 am-2:52 pm
1 stop7h 52m
$312
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 8/27
9:05 am-4:33 pm
1 stop7h 28m
San Juan Luis Munoz Marin Intl
Sun 8/30
1:19 pm-11:08 pm
1 stop9h 49m
$312
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Fri 9/11
8:00 am-4:31 pm
1 stop8h 31m
San Juan Luis Munoz Marin Intl
Wed 9/16
5:41 pm-1:17 am
1 stop7h 36m
$312
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Fri 9/4
9:55 pm-1:55 am
Nonstop4h 00m
San Juan Luis Munoz Marin Intl
Tue 9/8
4:55 pm-12:42 am
1 stop7h 47m
$342
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 7/30
8:50 am-12:53 pm
Nonstop4h 03m
San Juan Luis Munoz Marin Intl
Tue 8/11
5:49 pm-1:25 am
1 stop7h 36m
$348
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Mon 8/3
8:50 am-12:57 pm
Nonstop4h 07m
San Juan Luis Munoz Marin Intl
Mon 8/10
7:30 am-4:13 pm
1 stop8h 43m
$348
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Wed 7/29
5:30 am-1:11 pm
1 stop7h 41m
San Juan Luis Munoz Marin Intl
Tue 8/11
5:49 pm-1:25 am
1 stop7h 36m
$352
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Wed 8/19
9:05 am-4:33 pm
1 stop7h 28m
San Juan Luis Munoz Marin Intl
Sat 8/29
5:49 pm-1:25 am
1 stop7h 36m
$352
Showing 1-10 of 23 resultsSorted by cheapest first
Best time to book a flight from Boston to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from Boston with our price prediction graph.
BOS-PR1
BOS-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 Boston to San Juan
BOS-PR1
BOS-SJU
What is the cheapest month to book a flight from Boston to San Juan?
Currently, March is the cheapest month in which you can book a flight from Boston to San Juan (average of $275). Flying from Boston to San Juan in September is currently the most expensive (average of $501). 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 BOS to SJU?
Find hourly flight availability from Boston 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 May 25, 2026.
A simple way to save on the total cost of your ticket is to fly from Boston to San Juan in the afternoon. If you’re flexible enough to do this you can expect to save up to 24% on your trip compared to booking a flight in the morning.
Weekly flight availability from Boston to San Juan
Explore weekly flight availability from Boston to San Juan. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 25, 2026.
The most flights from BOS to PR1 are scheduled on a Monday (14 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from Boston to San Juan?
How often are flights from Boston to San Juan delayed?
About 26% of weekly flights between Boston and San Juan have experienced delays in the past year, with the average delay time being 153 minutes.
What is the most punctual flight time for Boston to San Juan flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Wednesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Boston to San Juan flights?
Over the last year, Delta have had the lowest number of delays on this route, with just 17% of flights being delayed.
How far ahead should I book a flight from Boston to San Juan?
The best time to book flights from Boston to San Juan is 67 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from Boston to San Juan?
Use this chart to determine the cheapest time to fly round-trip from Boston to San Juan. Price data was last updated on May 23, 2026.
Travelers seeking maximum savings on their Boston to San Juan flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 May 25, 2026.
Get a feel of what it's like to fly with Delta,JetBlue, andAmerican Airlines from Boston 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.
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Spirit Airlines
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from Boston 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 Boston to San Juan
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Complete your trip
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Search flights from Boston to San Juan by cabin class
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Boston and San Juan flights
Browse other Boston and San Juan flight options. Last updated on May 25, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on May 25, 2026.
Popular flight searches
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Top 7 airlines flying from Boston to San Juan
Discover the top 7 airlines that operate flights from Boston 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 May 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$86 | Average$280 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$96 | Average$262 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$124 | Average$584 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$146 | Average$366 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$211 | Average$418 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$242 | Average$418 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$313 | Average$399 | FlexibilityNo cancel fee | On-time63% |