$70+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap 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 January 18, 2026.
Round-trip from | $140 (CheapOair) |
|---|---|
One-way from | $70 (Spirit) |
Popular in | December |
Cheapest in | January |
Average price | $254 |
Find flight deals from Boston to San Juan
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 January 18, 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 January 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This CheapOair deal was found by Cheapflights users on 1/16. 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.
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
This Cheapflightsfares deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Expedia deal was found by Cheapflights users on 1/16. 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.
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
This Kiwi.com deal was found by Cheapflights users on 1/17. 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.
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
This Cheapflightsfares deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 1/16. 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.
This Cheapflightsfares deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
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
Price
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sun 1/25
1:00 pm-6:05 pm
Nonstop4h 05m
San Juan Luis Munoz Marin Intl
Sun 2/1
5:01 am-8:11 am
Nonstop4h 10m
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sun 1/25
6:45 pm-11:48 pm
Nonstop4h 03m
San Juan Luis Munoz Marin Intl
Mon 2/2
7:15 pm-10:28 pm
Nonstop4h 13m
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 1/24
2:50 pm-11:00 pm
1 stop7h 10m
San Juan Luis Munoz Marin Intl
Wed 1/28
6:10 am-2:20 pm
1 stop9h 10m
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 1/24
5:50 pm-10:55 pm
Nonstop4h 05m
San Juan Luis Munoz Marin Intl
Tue 1/27
6:15 am-9:25 am
Nonstop4h 10m
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 2/28
9:47 am-9:26 pm
1 stop10h 39m
San Juan Luis Munoz Marin Intl
Thu 3/5
2:05 am-7:45 am
1 stop6h 40m
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sun 2/8
9:30 am-10:22 pm
2 stops11h 52m
San Juan Luis Munoz Marin Intl
Fri 2/13
2:05 am-9:15 am
1 stop8h 10m
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Wed 1/28
12:08 pm-10:22 pm
2 stops9h 14m
San Juan Luis Munoz Marin Intl
Sat 1/31
7:45 am-6:20 pm
1 stop11h 35m
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 1/24
10:30 am-10:22 pm
2 stops10h 52m
San Juan Luis Munoz Marin Intl
Wed 1/28
8:35 am-6:57 pm
2 stops11h 22m
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 1/31
10:10 am-3:15 pm
Nonstop4h 05m
San Juan Luis Munoz Marin Intl
Tue 2/3
2:25 pm-5:45 pm
Nonstop4h 20m
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 2/21
4:45 pm-11:56 pm
1 stop6h 11m
San Juan Luis Munoz Marin Intl
Thu 2/26
6:15 am-5:32 pm
1 stop12h 17m
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.
Cheapflights Insights
Everything you need to know about your flight from Boston to San Juan
How far ahead should I book a flight from Boston to San Juan?
Use this chart to determine the optimal time to book a round-trip flight from Boston to San Juan. Price data was last updated on January 16, 2026.
The best time to book flights from Boston to San Juan is 47 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 $71). Flying from Boston to San Juan in November is currently the most expensive (average of $177). 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 January 18, 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 8% on your trip compared to booking a flight at noon.
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 January 10, 2026.
Travelers seeking maximum savings on their Boston to San Juan flight should consider departing on Sunday 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.
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 January 18, 2026.
The most flights from BOS to PR1 are scheduled on a Sunday (14 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 on average).
How often are flights from Boston to San Juan delayed?
About 24% of weekly flights between Boston and San Juan have experienced delays in the past year, with the average delay time being 145 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 at night 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 Thursday 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 January 18, 2026.
Get a feel of what it's like to fly with Delta, American Airlines, and JetBlue 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.
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Jim,Nov 2025
AVL - ATL
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
See prices for flight routes from nearby airports that may be better suited for you.
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 January 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$76 | Average$204 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$241 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$124 | Average$544 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$136 | Average$320 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$194 | Average$352 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$242 | Average$417 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$383 | Average$533 | FlexibilityNo cancel fee | On-time63% |