$111+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Jun 8 — Jun 151
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 68 days in advance, depart on a Wednesday or Sunday and return on a Friday
Cheap flight deals from Boston to San Juan
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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 9, 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 9, 2026.
This Trip.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1810:17 am
BOS
- SJU
1 stop7h 13m
Frontier
Thu 5/285:15 pm
SJU
- BOS
1 stop14h 34m
Frontier
Deal found 5/4![Frontier logo]()
$211
This Priceline deal was found by Cheapflights users on 5/4. 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.
Mon 5/1810:17 am
BOS
- SJU
1 stop7h 13m
Frontier
Tue 5/195:15 pm
SJU
- BOS
1 stop8h 09m
Frontier
Deal found 5/4![Frontier logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 5/8. 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 8/1111:05 am
BOS
- SJU
1 stop15h 06m
Frontier
Thu 8/135:15 pm
SJU
- BOS
1 stop8h 08m
Frontier
Deal found 5/8![Frontier logo]()
$235
This Frontier deal was found by Cheapflights users on 5/5. 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 8/411:05 am
BOS
- SJU
1 stop12h 24m
Frontier
Wed 8/125:15 pm
SJU
- BOS
1 stop14h 31m
Frontier
Deal found 5/5![Frontier logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Mon 8/176:00 am
BOS
- SJU
1 stop8h 16m
Frontier
Thu 8/205:15 pm
SJU
- BOS
1 stop8h 12m
Frontier
Deal found 5/5![Frontier logo]()
$237
This Frontier deal was found by Cheapflights users on 5/5. 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 8/411:05 am
BOS
- SJU
1 stop12h 24m
Frontier
Thu 8/135:15 pm
SJU
- BOS
1 stop8h 08m
Frontier
Deal found 5/5![Frontier logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Thu 8/206:00 am
BOS
- SJU
1 stop8h 15m
Frontier
Thu 8/275:15 pm
SJU
- BOS
1 stop8h 12m
Frontier
Deal found 5/6![Frontier logo]()
$242
This eDestinos deal was found by Cheapflights users on 5/8. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:05 am
BOS
- SJU
1 stop15h 06m
Frontier
Mon 8/245:15 pm
SJU
- BOS
1 stop14h 37m
Frontier
Deal found 5/8![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Wed 8/56:00 am
BOS
- SJU
1 stop8h 16m
Frontier
Wed 8/125:15 pm
SJU
- BOS
1 stop8h 08m
Frontier
Deal found 5/6![Frontier logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Thu 8/206:00 am
BOS
- SJU
1 stop8h 15m
Frontier
Sun 8/235:15 pm
SJU
- BOS
1 stop8h 12m
Frontier
Deal found 5/5![Frontier logo]()
$255
This Frontier deal was found by Cheapflights users on 5/5. 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 8/1211:05 am
BOS
- SJU
1 stop12h 24m
Frontier
Tue 8/185:15 pm
SJU
- BOS
1 stop8h 12m
Frontier
Deal found 5/5![Frontier logo]()
$256
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 9, 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 9, 2026.
This JetBlue deal was found by Cheapflights users on 5/6. 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 5/165:59 pm
BOS
- SJU
Nonstop4h 02m
JetBlue
Wed 5/207:11 pm
SJU
- BOS
Nonstop4h 09m
JetBlue
Deal found 5/6![JetBlue logo]()
$383
This Southwest deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/58:15 am
BOS
- SJU
2 stops10h 45m
Southwest
Wed 8/125:15 am
SJU
- BOS
2 stops10h 45m
Southwest
Deal found 5/6![Southwest logo]()
$422
This United Airlines deal was found by Cheapflights users on 5/5. 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.
Sun 6/77:30 am
BOS
- SJU
1 stop6h 15m
United Airlines
Wed 6/107:20 am
SJU
- BOS
2 stops9h 18m
United Airlines
Deal found 5/5![United Airlines logo]()
$469
This Delta deal was found by Cheapflights users on 5/5. 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 7/28:50 am
BOS
- SJU
Nonstop4h 04m
Delta
Mon 7/132:03 pm
SJU
- BOS
Nonstop4h 07m
Delta
Deal found 5/5![Delta logo]()
$495
This JetBlue deal was found by Cheapflights users on 5/4. 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 5/228:15 pm
BOS
- SJU
Nonstop4h 04m
JetBlue
Sat 5/233:30 am
SJU
- BOS
1 stop7h 32m
JetBlue
Deal found 5/4![JetBlue logo]()
$452
This Delta deal was found by Cheapflights users on 5/5. 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 5/228:50 am
BOS
- SJU
Nonstop3h 59m
Delta
Tue 5/262:00 pm
SJU
- BOS
Nonstop4h 18m
Delta
Deal found 5/5![Delta logo]()
$496
This United Airlines deal was found by Cheapflights users on 5/4. 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 5/139:20 am
BOS
- SJU
2 stops12h 04m
United Airlines
Wed 5/207:20 am
SJU
- BOS
2 stops12h 06m
United Airlines
Deal found 5/4![United Airlines logo]()
$497
This JetBlue deal was found by Cheapflights users on 5/4. 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.
Sun 6/219:44 pm
BOS
- SJU
Nonstop4h 00m
JetBlue
Thu 7/164:55 pm
SJU
- BOS
Nonstop4h 05m
JetBlue
Deal found 5/4![JetBlue logo]()
$455
This Southwest deal was found by Cheapflights users on 5/8. 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 7/23:55 pm
BOS
- SJU
2 stops9h 25m
Southwest
Mon 7/65:30 am
SJU
- BOS
1 stop9h 45m
Southwest
Deal found 5/8![Southwest logo]()
$514
This JetBlue deal was found by Cheapflights users on 5/5. 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.
Thu 7/212:42 pm
BOS
- SJU
1 stop9h 49m
JetBlue
Wed 7/159:10 pm
SJU
- BOS
1 stop9h 59m
JetBlue
Deal found 5/5![JetBlue logo]()
$486
This Delta deal was found by Cheapflights users on 5/7. 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 8/58:50 am
BOS
- SJU
Nonstop4h 07m
Delta
Sun 8/92:10 pm
SJU
- BOS
Nonstop4h 11m
Delta
Deal found 5/7![Delta logo]()
$536
This JetBlue deal was found by Cheapflights users on 5/8. 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 6/295:15 am
BOS
- SJU
1 stop7h 12m
JetBlue
Sun 7/128:50 pm
SJU
- BOS
Nonstop4h 05m
JetBlue
Deal found 5/8![JetBlue logo]()
$519
Last-minute flights from Boston to San JuanDiscover last-minute flight deals from Boston to San Juan. Data last updated May 9, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to San Juan. Data last updated May 9, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1810:17 am
BOS
- SJU
1 stop7h 13m
Frontier
Thu 5/285:15 pm
SJU
- BOS
1 stop14h 34m
Frontier
Deal found 5/4![Frontier logo]()
$211
This Priceline deal was found by Cheapflights users on 5/4. 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.
Mon 5/1810:17 am
BOS
- SJU
1 stop7h 13m
Frontier
Tue 5/195:15 pm
SJU
- BOS
1 stop8h 09m
Frontier
Deal found 5/4![Frontier logo]()
$212
This Trip.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1810:17 am
BOS
- SJU
1 stop7h 13m
Frontier
Thu 5/219:00 am
SJU
- BOS
1 stop26h 06m
Frontier
Deal found 5/4![Frontier logo]()
$261
This Priceline deal was found by Cheapflights users on 5/4. 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.
Mon 5/1810:17 am
BOS
- SJU
1 stop15h 51m
Multiple Airlines
Thu 5/215:01 am
SJU
- BOS
Nonstop4h 15m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$268
This Priceline deal was found by Cheapflights users on 5/4. 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 5/268:15 pm
BOS
- SJU
Nonstop4h 04m
Multiple Airlines
Wed 6/35:15 pm
SJU
- BOS
1 stop8h 09m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$280
This Priceline deal was found by Cheapflights users on 5/4. 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.
Sat 5/305:40 pm
BOS
- SJU
Nonstop4h 02m
Multiple Airlines
Thu 6/45:15 pm
SJU
- BOS
1 stop8h 09m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$273
This SmartFares deal was found by Cheapflights users on 5/8. 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 5/315:40 pm
BOS
- SJU
Nonstop4h 02m
JetBlue
Thu 6/45:01 am
SJU
- BOS
Nonstop4h 15m
JetBlue
Deal found 5/8![JetBlue logo]()
$288
This Priceline deal was found by Cheapflights users on 5/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:40 pm
BOS
- SJU
Nonstop4h 02m
Multiple Airlines
Thu 6/45:15 pm
SJU
- BOS
1 stop8h 09m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$282
This Priceline deal was found by Cheapflights users on 5/5. 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.
Fri 6/55:40 pm
BOS
- SJU
Nonstop4h 02m
Multiple Airlines
Tue 6/168:00 am
SJU
- BOS
1 stop27h 05m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$286
This Booking.com deal was found by Cheapflights users on 5/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/76:00 am
BOS
- SJU
1 stop8h 07m
Frontier
Sun 6/145:15 pm
SJU
- BOS
1 stop14h 37m
Frontier
Deal found 5/4![Frontier logo]()
$291
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 9, 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 9, 2026.
This Trip.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2010:07 am
BOS
- SJU
1 stop21h 57m
Frontier
Deal found 5/4![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Wed 7/811:05 am
BOS
- SJU
1 stop15h 06m
Frontier
Deal found 5/5![Frontier logo]()
$117
This Expedia deal was found by Cheapflights users on 5/5. 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 7/1811:05 am
BOS
- SJU
1 stop20h 52m
Frontier
Deal found 5/5![Frontier logo]()
$126
This Super.com deal was found by Cheapflights users on 5/8. 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.
Mon 7/1311:05 am
BOS
- SJU
1 stop15h 06m
Frontier
Deal found 5/8![Frontier logo]()
$137
This Frontier deal was found by Cheapflights users on 5/5. 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.
Sun 8/26:00 am
BOS
- SJU
1 stop8h 16m
Frontier
Deal found 5/5![Frontier logo]()
$138
This Expedia deal was found by Cheapflights users on 5/5. 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.
Sun 7/1211:05 am
BOS
- SJU
1 stop30h 31m
Frontier
Deal found 5/5![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 5/8. 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.
Wed 7/2911:05 am
BOS
- SJU
1 stop15h 06m
Frontier
Deal found 5/8![Frontier logo]()
$146
This SmartFares deal was found by Cheapflights users on 5/8. 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 5/2412:16 pm
BOS
- SJU
Nonstop4h 04m
JetBlue
Deal found 5/8![JetBlue logo]()
$147
This SmartFares deal was found by Cheapflights users on 5/4. 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 5/236:14 pm
BOS
- SJU
Nonstop4h 02m
JetBlue
Deal found 5/4![JetBlue logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Mon 7/2711:05 am
BOS
- SJU
1 stop30h 31m
Frontier
Deal found 5/5![Frontier logo]()
$151
This Cheapflightsfares deal was found by Cheapflights users on 5/5. 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 5/258:15 pm
BOS
- SJU
Nonstop4h 04m
JetBlue
Deal found 5/5![JetBlue logo]()
$157
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 9, 2026.
Round-trip from | $211 (Trip.com) |
|---|---|
One-way from | $111 (Trip.com) |
Popular in | December |
Cheapest in | January |
Average price | $349 |
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 9, 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
Sat 5/16
5:59 pm-10:01 pm
Nonstop4h 02m
San Juan Luis Munoz Marin Intl
Wed 5/20
7:11 pm-11:20 pm
Nonstop4h 09m
$383
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Wed 8/5
8:15 am-7:00 pm
2 stops10h 45m
San Juan Luis Munoz Marin Intl
Wed 8/12
5:15 am-4:00 pm
2 stops10h 45m
$422
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Fri 5/22
8:15 pm-12:19 am
Nonstop4h 04m
San Juan Luis Munoz Marin Intl
Sat 5/23
3:30 am-11:02 am
1 stop7h 32m
$452
Quickest round-trip
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sun 6/21
9:44 pm-1:44 am
Nonstop4h 00m
San Juan Luis Munoz Marin Intl
Thu 7/16
4:55 pm-9:00 pm
Nonstop4h 05m
$455
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sun 6/7
7:30 am-1:45 pm
1 stop6h 15m
San Juan Luis Munoz Marin Intl
Wed 6/10
7:20 am-4:38 pm
2 stops9h 18m
$469
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 7/2
12:42 pm-10:31 pm
1 stop9h 49m
San Juan Luis Munoz Marin Intl
Wed 7/15
9:10 pm-7:09 am
1 stop9h 59m
$486
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 7/2
8:50 am-12:54 pm
Nonstop4h 04m
San Juan Luis Munoz Marin Intl
Mon 7/13
2:03 pm-6:10 pm
Nonstop4h 07m
$495
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Fri 5/22
8:50 am-12:49 pm
Nonstop3h 59m
San Juan Luis Munoz Marin Intl
Tue 5/26
2:00 pm-6:18 pm
Nonstop4h 18m
$496
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Wed 5/13
9:20 am-9:24 pm
2 stops12h 04m
San Juan Luis Munoz Marin Intl
Wed 5/20
7:20 am-7:26 pm
2 stops12h 06m
$497
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 7/2
3:55 pm-1:20 am
2 stops9h 25m
San Juan Luis Munoz Marin Intl
Mon 7/6
5:30 am-3:15 pm
1 stop9h 45m
$514
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
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 46 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 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 $273). Flying from Boston to San Juan in September is currently the most expensive (average of $554). 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 9, 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 22% on your trip compared to booking a flight in the morning.
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 2, 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.
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 9, 2026.
The most flights from BOS to PR1 are scheduled on a Friday (15 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 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 25% of weekly flights between Boston and San Juan have experienced delays in the past year, with the average delay time being 150 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.
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 9, 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.
Entertainment
7.8
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Crew
8.5
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
Complete your trip to San Juan by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boston to San Juan by cabin class
Find flights from Boston to San Juan, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and San Juan flights
Browse other Boston and San Juan flight options. Last updated on May 9, 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 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$86 | Average$279 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$93 | Average$260 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$124 | Average$543 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$145 | Average$355 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$211 | Average$398 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$242 | Average$405 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$313 | Average$399 | FlexibilityNo cancel fee | On-time63% |