$165+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Aug 7 — Aug 141
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 March, booked 47 days in advance, depart on a Monday 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 July 8, 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 July 8, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:40 pm
BOS
- SJU
1 stop9h 33m
JetBlue
Tue 9/81:50 pm
SJU
- BOS
Nonstop4h 07m
JetBlue
Deal found 7/8![JetBlue logo]()
$304
This Cheapflightsfares deal was found by Cheapflights users on 7/5. 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.
Thu 9/35:01 am
BOS
- SJU
1 stop9h 13m
JetBlue
Sat 9/196:00 am
SJU
- BOS
Nonstop4h 03m
JetBlue
Deal found 7/5![JetBlue logo]()
$306
This Priceline deal was found by Cheapflights users on 7/3. 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 8/410:04 am
BOS
- SJU
1 stop9h 38m
Multiple Airlines
Tue 10/66:00 am
SJU
- BOS
Nonstop4h 03m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$307
This Expedia deal was found by Cheapflights users on 7/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:44 pm
BOS
- SJU
2 stops11h 14m
JetBlue
Fri 9/186:00 am
SJU
- BOS
Nonstop4h 03m
JetBlue
Deal found 7/6![JetBlue logo]()
$308
This Cheapflightsfares deal was found by Cheapflights users on 7/6. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:15 am
BOS
- SJU
Nonstop4h 08m
JetBlue
Wed 9/97:35 pm
SJU
- BOS
Nonstop4h 08m
JetBlue
Deal found 7/6![JetBlue logo]()
$309
This Delta deal was found by Cheapflights users on 7/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:50 am
BOS
- SJU
Nonstop4h 07m
Delta
Tue 9/82:10 pm
SJU
- BOS
Nonstop4h 13m
Delta
Deal found 7/6![Delta logo]()
$310
This Cheapflightsfares deal was found by Cheapflights users on 7/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:01 am
BOS
- SJU
1 stop9h 13m
JetBlue
Tue 9/81:50 pm
SJU
- BOS
Nonstop4h 07m
JetBlue
Deal found 7/7![JetBlue logo]()
$311
This JetBlue deal was found by Cheapflights users on 7/7. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:20 pm
BOS
- SJU
Nonstop4h 38m
JetBlue
Sat 10/176:12 am
SJU
- BOS
Nonstop4h 03m
JetBlue
Deal found 7/7![JetBlue logo]()
$312
This Cheapflightsfares deal was found by Cheapflights users on 7/3. 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 10/166:55 am
BOS
- SJU
1 stop9h 01m
JetBlue
Mon 10/196:12 am
SJU
- BOS
Nonstop4h 03m
JetBlue
Deal found 7/3![JetBlue logo]()
$314
This Delta deal was found by Cheapflights users on 7/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:50 am
BOS
- SJU
1 stop9h 48m
Delta
Wed 9/92:10 pm
SJU
- BOS
Nonstop4h 13m
Delta
Deal found 7/6![Delta logo]()
$315
This United Airlines deal was found by Cheapflights users on 7/5. 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.
Wed 9/26:00 am
BOS
- SJU
2 stops14h 38m
United Airlines
Tue 9/81:25 pm
SJU
- BOS
1 stop8h 34m
United Airlines
Deal found 7/5![United Airlines logo]()
$316
This eDestinos deal was found by Cheapflights users on 7/5. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:04 am
BOS
- SJU
1 stop25h 12m
Frontier
Wed 8/54:08 pm
SJU
- BOS
1 stop17h 01m
Frontier
Deal found 7/5![Frontier logo]()
$317
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 July 8, 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 July 8, 2026.
This Delta deal was found by Cheapflights users on 7/5. 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.
Wed 9/28:50 am
BOS
- SJU
Nonstop4h 07m
Delta
Tue 9/82:10 pm
SJU
- BOS
Nonstop4h 13m
Delta
Deal found 7/5![Delta logo]()
$310
This United Airlines deal was found by Cheapflights users on 7/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:00 am
BOS
- SJU
1 stop7h 45m
United Airlines
Sat 9/51:00 am
SJU
- BOS
1 stop8h 48m
United Airlines
Deal found 7/6![United Airlines logo]()
$332
This JetBlue deal was found by Cheapflights users on 7/3. 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 10/229:30 am
BOS
- SJU
1 stop6h 26m
JetBlue
Wed 10/286:00 am
SJU
- BOS
Nonstop4h 09m
JetBlue
Deal found 7/3![JetBlue logo]()
$362
This Delta deal was found by Cheapflights users on 7/7. 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.
Thu 8/278:50 am
BOS
- SJU
Nonstop4h 07m
Delta
Wed 9/22:10 pm
SJU
- BOS
Nonstop4h 11m
Delta
Deal found 7/7![Delta logo]()
$323
This United Airlines deal was found by Cheapflights users on 7/3. 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.
Thu 10/227:38 am
BOS
- SJU
1 stop6h 07m
United Airlines
Mon 10/267:25 am
SJU
- BOS
1 stop11h 50m
United Airlines
Deal found 7/3![United Airlines logo]()
$356
This Delta deal was found by Cheapflights users on 7/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/318:55 am
BOS
- SJU
Nonstop4h 06m
Delta
Sat 11/73:06 pm
SJU
- BOS
Nonstop4h 13m
Delta
Deal found 7/4![Delta logo]()
$327
This Delta deal was found by Cheapflights users on 7/7. 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.
Tue 8/188:50 am
BOS
- SJU
Nonstop4h 07m
Delta
Tue 8/257:30 am
SJU
- BOS
1 stop8h 43m
Delta
Deal found 7/7![Delta logo]()
$328
This United Airlines deal was found by Cheapflights users on 7/3. 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 10/175:45 am
BOS
- SJU
1 stop6h 49m
United Airlines
Sat 10/241:25 pm
SJU
- BOS
2 stops10h 34m
United Airlines
Deal found 7/3![United Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 7/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:50 am
BOS
- SJU
Nonstop4h 07m
Delta
Tue 9/12:59 pm
SJU
- BOS
1 stop10h 26m
Delta
Deal found 7/6![Delta logo]()
$328
This Delta deal was found by Cheapflights users on 7/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/98:20 am
BOS
- SJU
Nonstop4h 00m
Delta
Sat 12/127:15 am
SJU
- BOS
1 stop7h 32m
Delta
Deal found 7/6![Delta logo]()
$365
This Delta deal was found by Cheapflights users on 7/7. 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 11/111:10 pm
BOS
- SJU
1 stop9h 45m
Delta
Mon 11/167:15 am
SJU
- BOS
1 stop9h 07m
Delta
Deal found 7/7![Delta logo]()
$369
This Delta deal was found by Cheapflights users on 7/7. 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.
Thu 11/128:13 am
BOS
- SJU
Nonstop4h 07m
Delta
Mon 11/162:30 pm
SJU
- BOS
Nonstop4h 23m
Delta
Deal found 7/7![Delta logo]()
$399
Last-minute flights from Boston to San JuanDiscover last-minute flight deals from Boston to San Juan. Data last updated July 8, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to San Juan. Data last updated July 8, 2026 and is based on user searches.
This eDestinos deal was found by Cheapflights users on 7/5. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:04 am
BOS
- SJU
1 stop25h 12m
Frontier
Wed 8/54:08 pm
SJU
- BOS
1 stop17h 01m
Frontier
Deal found 7/5![Frontier logo]()
$317
This Super.com deal was found by Cheapflights users on 7/3. 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 7/295:55 pm
BOS
- SJU
1 stop8h 10m
JetBlue
Fri 10/27:35 pm
SJU
- BOS
Nonstop4h 08m
JetBlue
Deal found 7/3![JetBlue logo]()
$314
This Priceline deal was found by Cheapflights users on 7/3. 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 8/410:04 am
BOS
- SJU
1 stop9h 38m
Multiple Airlines
Tue 10/66:00 am
SJU
- BOS
Nonstop4h 03m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$307
This Cheapflightsfares deal was found by Cheapflights users on 7/6. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/168:42 am
BOS
- SJU
1 stop7h 17m
JetBlue
Mon 9/147:35 pm
SJU
- BOS
Nonstop4h 08m
JetBlue
Deal found 7/6![JetBlue logo]()
$326
This Expedia deal was found by Cheapflights users on 7/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:44 pm
BOS
- SJU
2 stops11h 14m
JetBlue
Fri 9/186:00 am
SJU
- BOS
Nonstop4h 03m
JetBlue
Deal found 7/6![JetBlue logo]()
$308
This JetBlue deal was found by Cheapflights users on 7/4. 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.
Thu 8/207:50 pm
BOS
- SJU
Nonstop4h 04m
JetBlue
Thu 8/272:30 pm
SJU
- BOS
Nonstop4h 10m
JetBlue
Deal found 7/4![JetBlue logo]()
$325
This United Airlines deal was found by Cheapflights users on 7/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/243:30 pm
BOS
- SJU
1 stop8h 20m
United Airlines
Tue 9/81:25 pm
SJU
- BOS
2 stops10h 34m
United Airlines
Deal found 7/6![United Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 7/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:50 am
BOS
- SJU
1 stop9h 48m
Delta
Tue 9/82:10 pm
SJU
- BOS
Nonstop4h 13m
Delta
Deal found 7/6![Delta logo]()
$315
This JetBlue deal was found by Cheapflights users on 7/3. 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 8/277:50 pm
BOS
- SJU
Nonstop4h 04m
JetBlue
Wed 9/26:11 pm
SJU
- BOS
Nonstop4h 07m
JetBlue
Deal found 7/3![JetBlue logo]()
$323
This Cheapflightsfares deal was found by Cheapflights users on 7/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am
BOS
- SJU
Nonstop4h 00m
JetBlue
Tue 9/11:50 pm
SJU
- BOS
Nonstop4h 09m
JetBlue
Deal found 7/7![JetBlue logo]()
$320
This Delta deal was found by Cheapflights users on 7/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/308:50 am
BOS
- SJU
Nonstop4h 07m
Delta
Tue 9/82:10 pm
SJU
- BOS
Nonstop4h 13m
Delta
Deal found 7/6![Delta logo]()
$310
This Delta deal was found by Cheapflights users on 7/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/305:30 am
BOS
- SJU
1 stop11h 08m
Delta
Sat 9/127:30 am
SJU
- BOS
1 stop7h 12m
Delta
Deal found 7/6![Delta logo]()
$319
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 July 8, 2026.
Search for one-way flight options from Boston to San Juan. Find affordable one-way fares based on user searches. Data last updated July 8, 2026.
This Super.com deal was found by Cheapflights users on 7/3. 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 8/1210:04 am
BOS
- SJU
1 stop16h 11m
Frontier
Deal found 7/3![Frontier logo]()
$165
This Southwest deal was found by Cheapflights users on 7/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/142:15 pm
BOS
- SJU
1 stop8h 35m
Southwest
Deal found 7/5![Southwest logo]()
$166
This eDestinos deal was found by Cheapflights users on 7/6. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/310:04 am
BOS
- SJU
1 stop9h 28m
Frontier
Deal found 7/6![Frontier logo]()
$167
This CheapOair deal was found by Cheapflights users on 7/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2810:04 am
BOS
- SJU
1 stop16h 11m
Frontier
Deal found 7/7![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1912:45 pm
BOS
- SJU
2 stops12h 11m
Frontier
Deal found 7/7![Frontier logo]()
$169
This Orbitz deal was found by Cheapflights users on 7/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3112:44 pm
BOS
- SJU
2 stops11h 14m
JetBlue
Deal found 7/6![JetBlue logo]()
$170
This SmartFares deal was found by Cheapflights users on 7/7. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/712:42 pm
BOS
- SJU
1 stop7h 08m
JetBlue
Deal found 7/7![JetBlue logo]()
$171
This JetBlue deal was found by Cheapflights users on 7/5. 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.
Tue 9/17:50 pm
BOS
- SJU
Nonstop4h 04m
JetBlue
Deal found 7/5![JetBlue logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/58:41 am
BOS
- SJU
2 stops40h 00m
Frontier
Deal found 7/7![Frontier logo]()
$173
This Delta deal was found by Cheapflights users on 7/3. 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 9/46:05 am
BOS
- SJU
1 stop10h 28m
Delta
Deal found 7/3![Delta logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2212:45 pm
BOS
- SJU
2 stops12h 11m
Frontier
Deal found 7/7![Frontier logo]()
$177
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 July 8, 2026.
Round-trip from | $304 (Cheapflightsfares) |
|---|---|
One-way from | $165 (Super.com) |
Popular in | July |
Cheapest in | January |
Average price | $424 |
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 July 8, 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
Wed 9/2
8:50 am-12:57 pm
Nonstop4h 07m
San Juan Luis Munoz Marin Intl
Tue 9/8
2:10 pm-6:23 pm
Nonstop4h 13m
$310
Quickest round-trip
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 8/27
8:50 am-12:57 pm
Nonstop4h 07m
San Juan Luis Munoz Marin Intl
Wed 9/2
2:10 pm-6:21 pm
Nonstop4h 11m
$323
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 10/31
8:55 am-1:01 pm
Nonstop4h 06m
San Juan Luis Munoz Marin Intl
Sat 11/7
3:06 pm-6:19 pm
Nonstop4h 13m
$327
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Tue 8/18
8:50 am-12:57 pm
Nonstop4h 07m
San Juan Luis Munoz Marin Intl
Tue 8/25
7:30 am-4:13 pm
1 stop8h 43m
$328
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 8/29
8:50 am-12:57 pm
Nonstop4h 07m
San Juan Luis Munoz Marin Intl
Tue 9/1
2:59 pm-1:25 am
1 stop10h 26m
$328
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 8/29
6:00 am-1:45 pm
1 stop7h 45m
San Juan Luis Munoz Marin Intl
Sat 9/5
1:00 am-9:48 am
1 stop8h 48m
$332
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 10/22
7:38 am-1:45 pm
1 stop6h 07m
San Juan Luis Munoz Marin Intl
Mon 10/26
7:25 am-7:15 pm
1 stop11h 50m
$356
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 10/22
9:30 am-3:56 pm
1 stop6h 26m
San Juan Luis Munoz Marin Intl
Wed 10/28
6:00 am-10:09 am
Nonstop4h 09m
$362
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Wed 12/9
8:20 am-1:20 pm
Nonstop4h 00m
San Juan Luis Munoz Marin Intl
Sat 12/12
7:15 am-1:47 pm
1 stop7h 32m
$365
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Wed 11/11
1:10 pm-11:55 pm
1 stop9h 45m
San Juan Luis Munoz Marin Intl
Mon 11/16
7:15 am-3:22 pm
1 stop9h 07m
$369
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 $272). Flying from Boston to San Juan in December is currently the most expensive (average of $444). 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 July 8, 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 10% on your trip compared to booking a flight in the morning.
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 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?
Tuesday 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 19% 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 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 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 July 4, 2026.
Travelers seeking maximum savings on their Boston to San Juan flight should consider departing on Wednesday evenings 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 July 8, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, 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
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
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 July 8, 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 July 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Boston to San Juan
Discover the top 6 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 July 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$85 | Average$285 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$147 | Average$376 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$162 | Average$562 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$211 | Average$418 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$242 | Average$445 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$313 | Average$399 | FlexibilityNo cancel fee | On-time63% |