$155+ Cheap flights from Boston (BOS) to San Juan
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Oct 7 — Oct 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
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 September 7, 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 September 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 9/2912:52 pm -
2 stops13h 21m
Fri 10/27:15 am -
1 stop26h 14m
Deal found 9/2![Multiple Airlines logo]()
$286
This Priceline deal was found by Cheapflights users on 9/3. 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.
Mon 12/711:57 am -
1 stop10h 38m
Fri 12/258:20 am -
Nonstop4h 19m
Deal found 9/3![Frontier logo]()
$302
This Priceline deal was found by Cheapflights users on 9/2. 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 12/72:21 pm -
Nonstop4h 06m
Fri 12/258:20 am -
Nonstop4h 19m
Deal found 9/2![Multiple Airlines logo]()
$305
This CheapOair deal was found by Cheapflights users on 9/2. 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.
Fri 9/257:55 am -
Nonstop4h 07m
Wed 9/306:42 pm -
1 stop15h 40m
Deal found 9/2![Multiple Airlines logo]()
$311
This United Airlines deal was found by Cheapflights users on 9/2. 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 10/2610:30 am -
2 stops10h 52m
Mon 11/22:05 am -
1 stop6h 38m
Deal found 9/2![United Airlines logo]()
$316
This Cheapflightsfares deal was found by Cheapflights users on 9/2. 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 10/298:08 pm -
Nonstop4h 05m
Sun 11/17:00 am -
Nonstop4h 13m
Deal found 9/2![JetBlue logo]()
$318
This FlightHub deal was found by Cheapflights users on 9/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:17 am -
1 stop11h 56m
Wed 9/306:42 pm -
1 stop15h 40m
Deal found 9/4![Frontier logo]()
$319
This Priceline deal was found by Cheapflights users on 9/5. 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.
Wed 10/1411:10 am -
Nonstop4h 04m
Fri 10/163:00 am -
1 stop8h 02m
Deal found 9/5![Multiple Airlines logo]()
$320
This JetBlue deal was found by Cheapflights users on 9/2. 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 9/277:55 am -
Nonstop4h 07m
Fri 10/97:35 pm -
Nonstop4h 08m
Deal found 9/2![JetBlue logo]()
$326
This Delta deal was found by Cheapflights users on 9/6. 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 10/38:55 am -
Nonstop4h 02m
Tue 10/62:02 pm -
Nonstop4h 13m
Deal found 9/6![Delta logo]()
$327
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 September 7, 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 September 7, 2026.
This Southwest deal was found by Cheapflights users on 9/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/33:30 pm -
1 stop6h 50m
Wed 11/116:40 am -
1 stop8h 50m
Deal found 9/3![Southwest logo]()
$326
This Delta deal was found by Cheapflights users on 9/5. 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.
Sat 10/178:50 am -
Nonstop4h 02m
Sat 10/246:45 am -
1 stop8h 04m
Deal found 9/5![Delta logo]()
$332
This United Airlines deal was found by Cheapflights users on 9/5. 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.
Sat 11/73:41 pm -
1 stop7h 55m
Fri 11/132:05 am -
1 stop6h 38m
Deal found 9/5![United Airlines logo]()
$336
This Delta deal was found by Cheapflights users on 9/3. 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 10/238:50 am -
Nonstop4h 02m
Tue 11/33:59 pm -
1 stop10h 21m
Deal found 9/3![Delta logo]()
$342
This Southwest deal was found by Cheapflights users on 9/6. 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.
Thu 11/1211:45 am -
2 stops10h 10m
Tue 11/175:40 am -
2 stops9h 50m
Deal found 9/6![Southwest logo]()
$369
This United Airlines deal was found by Cheapflights users on 9/2. 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 9/196:00 am -
1 stop7h 45m
Tue 9/221:25 pm -
1 stop8h 34m
Deal found 9/2![United Airlines logo]()
$382
This Delta deal was found by Cheapflights users on 9/3. 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.
Sat 9/198:55 am -
Nonstop4h 02m
Sat 9/262:10 pm -
Nonstop4h 13m
Deal found 9/3![Delta logo]()
$370
This United Airlines deal was found by Cheapflights users on 9/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:38 am -
1 stop6h 07m
Mon 10/191:00 am -
2 stops9h 32m
Deal found 9/7![United Airlines logo]()
$426
This Delta deal was found by Cheapflights users on 9/2. 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 9/198:55 am -
Nonstop4h 02m
Tue 9/222:10 pm -
Nonstop4h 13m
Deal found 9/2![Delta logo]()
$393
This United Airlines deal was found by Cheapflights users on 9/6. 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 10/179:23 am -
2 stops14h 27m
Fri 10/231:00 am -
2 stops9h 32m
Deal found 9/6![United Airlines logo]()
$426
This Delta deal was found by Cheapflights users on 9/3. 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.
Thu 1/213:10 pm -
1 stop7h 40m
Mon 2/12:25 pm -
Nonstop4h 20m
Deal found 9/3![Delta logo]()
$421
This United Airlines deal was found by Cheapflights users on 9/2. 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 1/206:00 am -
2 stops14h 24m
Wed 2/31:00 pm -
1 stop6h 23m
Deal found 9/2![United Airlines logo]()
$428
Last-minute flights from Boston to San JuanDiscover last-minute flight deals from Boston to San Juan. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to San Juan. Data last updated September 7, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 9/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:17 am -
1 stop11h 56m
Wed 9/306:42 pm -
1 stop15h 40m
Deal found 9/4![Frontier logo]()
$319
This CheapOair deal was found by Cheapflights users on 9/2. 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.
Fri 9/257:55 am -
Nonstop4h 07m
Wed 9/306:42 pm -
1 stop15h 40m
Deal found 9/2![Multiple Airlines logo]()
$311
This JetBlue deal was found by Cheapflights users on 9/2. 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 9/277:55 am -
Nonstop4h 07m
Fri 10/97:35 pm -
Nonstop4h 08m
Deal found 9/2![JetBlue logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 9/2912:52 pm -
2 stops13h 21m
Fri 10/27:15 am -
1 stop26h 14m
Deal found 9/2![Multiple Airlines logo]()
$286
This Delta deal was found by Cheapflights users on 9/6. 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 10/38:55 am -
Nonstop4h 02m
Tue 10/62:02 pm -
Nonstop4h 13m
Deal found 9/6![Delta logo]()
$327
This Delta deal was found by Cheapflights users on 9/6. 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 10/35:40 am -
1 stop7h 36m
Fri 10/302:02 pm -
Nonstop4h 13m
Deal found 9/6![Delta logo]()
$332
This Priceline deal was found by Cheapflights users on 9/5. 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.
Wed 10/1411:10 am -
Nonstop4h 04m
Fri 10/163:00 am -
1 stop8h 02m
Deal found 9/5![Multiple Airlines logo]()
$320
This United Airlines deal was found by Cheapflights users on 9/2. 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 10/267:15 am -
1 stop6h 25m
Wed 11/45:50 pm -
1 stop7h 09m
Deal found 9/2![United Airlines logo]()
$316
This CheapOair deal was found by Cheapflights users on 9/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2711:12 am -
1 stop13h 47m
Wed 11/47:00 am -
Nonstop4h 13m
Deal found 9/3![Multiple Airlines logo]()
$331
This Cheapflightsfares deal was found by Cheapflights users on 9/2. 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 10/298:08 pm -
Nonstop4h 05m
Sun 11/17:00 am -
Nonstop4h 13m
Deal found 9/2![JetBlue logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Sat 10/3110:19 am -
1 stop27h 06m
Mon 11/94:52 pm -
2 stops19h 38m
Deal found 9/5![Multiple Airlines logo]()
$330
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 September 7, 2026.
Search for one-way flight options from Boston to San Juan. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
This Expedia deal was found by Cheapflights users on 9/5. 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.
Tue 11/1712:15 pm -
1 stop11h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$155
This Super.com deal was found by Cheapflights users on 9/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:15 pm -
1 stop11h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$156
This Frontier deal was found by Cheapflights users on 9/2. 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 11/412:39 pm -
1 stop11h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:19 am -
1 stop27h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$160
This eDestinos deal was found by Cheapflights users on 9/2. 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.
Thu 9/2411:17 am -
1 stop14h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 11/710:19 am -
1 stop26h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Multiple Airlines logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Sat 10/312:54 pm -
2 stops24h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$163
This Southwest deal was found by Cheapflights users on 9/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:50 pm -
1 stop7h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Southwest logo]()
$168
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 September 7, 2026.
Round-trip from | $302 (Priceline) |
|---|---|
One-way from | $155 (Expedia) |
Popular in | July |
Cheapest in | January |
Average price | $316 |
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 7,457,451 searches. Data last updated September 7, 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 Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Sun 1/31
6:45 pm-11:50 pm
Nonstop4h 05m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$175
BostonSan Juan
BOS Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Fri 10/2
10:36 am-11:50 pm
2 stops13h 14m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$178
BostonSan Juan
BOS Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Tue 2/16
11:10 am-10:40 pm
2 stops10h 30m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$179
BostonSan Juan
BOS Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Sat 9/19
5:50 am-1:10 pm
1 stop7h 20m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$201
Quickest round-trip
BostonSan Juan
BOS Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Wed 9/23
8:55 am-12:57 pm
Nonstop4h 02m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$207
BostonSan Juan
BOS Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Fri 9/25
8:55 am-12:57 pm
Nonstop4h 02m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$207
BostonSan Juan
BOS Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Wed 3/3
9:30 am-9:00 pm
1 stop10h 30m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$214
BostonSan Juan
BOS Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Sun 11/15
9:00 am-10:22 pm
2 stops12h 22m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$223
BostonSan Juan
BOS Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Sun 1/31
11:45 am-6:15 am
2 stops17h 30m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$224
BostonSan Juan
BOS Boston Logan Intl - SJU San Juan Luis Munoz Marin Intl
BOSSJU
Boston Logan Intl
Sun 11/22
9:12 am-10:22 pm
2 stops12h 10m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$235
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, January is the cheapest month in which you can book a flight from Boston to San Juan (average of $274). Flying from Boston to San Juan in July is currently the most expensive (average of $462). 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 September 7, 2026.
A simple way to save on the total cost of your ticket is to fly from Boston to San Juan at noon. If you’re flexible enough to do this you can expect to save up to 14% 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?
Airfare is typical for this route at the moment.
Boston to San Juan flights typically cost between $279 and $386 in December.The cheapest round-trip price found within the last 5 days was $302 on Frontier (Dec 7-Dec 25).
How often are flights from Boston to San Juan delayed?
About 27% 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 September 5, 2026.
Travelers seeking maximum savings on their Boston to San Juan flight should consider departing on Tuesday at noon 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 September 7, 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
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
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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Boston and San Juan flights
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Top 5 airlines flying from Boston to San Juan
Discover the top 5 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 7,457,451 searches. Data last updated September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$85 | Average$290 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$161 | Average$389 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$173 | Average$571 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$212 | Average$392 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$259 | Average$450 | FlexibilityNo cancel fee | On-time71% |