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Flights from Boston to San Juan

Book direct flights from Boston to San Juan: One way flights from $142, round trip flights from $264. Find flight deals for the next 3 months below.

      • Cheapest nonstop
        BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Wed, Sep 9 | Delta Air Lines
        SJU 2:10 PM
        4h 13m
        Nonstop
        BOS 6:23 PM
        San Juan - Boston | Sun, Sep 13 | Delta Air Lines
        $264 $365
        28% off
        28% off
        $365 $264
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Tue, Sep 8 | Delta Air Lines
        SJU 7:30 AM
        7h 12m
        1 stop
        BOS 2:42 PM
        San Juan - Boston | Tue, Sep 15 | Delta Air Lines
        $260 $365
        28% off
        28% off
        $365 $260
      • BOS 6:00 AM
        8h 16m
        1 stop
        SJU 2:16 PM
        Boston - San Juan | Mon, Aug 3 | Frontier Airlines
        SJU 5:15 PM
        14h 31m
        1 stop
        BOS 7:46 AM
        San Juan - Boston | Wed, Aug 5 | Frontier Airlines
        $262 $365
        28% off
        28% off
        $365 $262
      • BOS 9:05 AM
        7h 44m
        1 stop
        SJU 4:49 PM
        Boston - San Juan | Sat, Sep 12 | Delta Air Lines
        SJU 7:30 AM
        7h 12m
        1 stop
        BOS 2:42 PM
        San Juan - Boston | Sat, Sep 19 | Delta Air Lines
        $266
        27% off
        $365 $266
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Mon, Sep 14 | Delta Air Lines
        SJU 7:30 AM
        7h 12m
        1 stop
        BOS 2:42 PM
        San Juan - Boston | Thu, Sep 17 | Delta Air Lines
        $267
        27% off
        $365 $267
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Thu, Sep 10 | Delta Air Lines
        SJU 1:16 PM
        9h 54m
        1 stop
        BOS 11:10 PM
        San Juan - Boston | Thu, Sep 17 | Delta Air Lines
        $275
        25% off
        $365 $275
      • BOS 11:05 AM
        15h 6m
        1 stop
        SJU 2:11 AM
        Boston - San Juan | Fri, Jul 24 | Frontier Airlines
        SJU 5:15 PM
        14h 31m
        1 stop
        BOS 7:46 AM
        San Juan - Boston | Fri, Jul 31 | Frontier Airlines
        $276
        24% off
        $365 $276
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Thu, Sep 17 | Delta Air Lines
        SJU 3:10 PM
        8h 48m
        1 stop
        BOS 11:58 PM
        San Juan - Boston | Sat, Sep 19 | Delta Air Lines
        $280
        23% off
        $365 $280
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Wed, Sep 16 | Delta Air Lines
        SJU 7:30 AM
        7h 12m
        1 stop
        BOS 2:42 PM
        San Juan - Boston | Wed, Sep 23 | Delta Air Lines
        $281
        23% off
        $365 $281
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Fri, Sep 11 | Delta Air Lines
        SJU 7:30 AM
        7h 12m
        1 stop
        BOS 2:42 PM
        San Juan - Boston | Mon, Sep 14 | Delta Air Lines
        $281
        23% off
        $365 $281
      • BOS 1:00 PM
        17h 25m
        1 stop
        SJU 2:00 PM
        Boston - San Juan | Thu, Jul 23 | Normal Airline
        SJU 3:00 PM
        6h
        Nonstop
        BOS 4:00 PM
        San Juan - Boston | Sat, Jul 25 | Normal Airline
        Find more flights
        Find more flights
      • Cheapest nonstop
        BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Tue, Sep 15 | Delta Air Lines
        $142 $425
        67% off
        67% off
        $425 $142
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Mon, Sep 14 | Delta Air Lines
        $146 $425
        66% off
        66% off
        $425 $146
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Wed, Sep 9 | Delta Air Lines
        $151 $425
        64% off
        64% off
        $425 $151
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Sun, Sep 13 | Delta Air Lines
        $154
        64% off
        $425 $154
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Wed, Sep 16 | Delta Air Lines
        $154
        64% off
        $425 $154
      • BOS 8:55 AM
        4h 2m
        Nonstop
        SJU 12:57 PM
        Boston - San Juan | Sat, Sep 12 | Delta Air Lines
        $177
        57% off
        $425 $177
      • BOS 11:05 AM
        20h 52m
        1 stop
        SJU 7:57 AM
        Boston - San Juan | Sat, Jul 25 | Frontier Airlines
        $244
        43% off
        $425 $244
      • BOS 11:05 AM
        30h 31m
        1 stop
        SJU 5:36 PM
        Boston - San Juan | Mon, Jul 27 | Frontier Airlines
        $244
        43% off
        $425 $244
      • BOS 11:05 AM
        15h 6m
        1 stop
        SJU 2:11 AM
        Boston - San Juan | Thu, Jul 23 | Frontier Airlines
        $264
        38% off
        $425 $264
      • BOS 11:05 AM
        15h 6m
        1 stop
        SJU 2:11 AM
        Boston - San Juan | Fri, Jul 31 | Frontier Airlines
        $327
        23% off
        $425 $327
      • BOS 1:00 PM
        17h 25m
        1 stop
        SJU 2:00 PM
        Boston - San Juan | Thu, Jul 23 | Normal Airline
        Find more flights
        Find more flights

Find cheap airlines flights from Boston to San Juan

You can choose from 3 airlines that fly from Boston to San Juan, including Delta Air Lines, Jetblue Airways, and Frontier Airlines. Delta Air Lines has lowest fares on this route.
Delta Air Lines logo Delta Air Lines
Jetblue Airways logo Jetblue Airways
Frontier Airlines logo Frontier Airlines
Airlines are determined based on actual purchased flight tickets from Boston to San Juan according to previous 12 months data from Trip.com.

Flight Info | Boston to San Juan

The distance between Boston and San Juan is approximately 2,701.02 km. It takes around 4 hours 5 minutes on average to fly from Boston to San Juan. Based on Trip.com's data travel demand peaks in July. The off-season for travel is October.

Cheapest one-way flight price $142
Cheapest round-trip ticket price $260
Off-season for travel October
Peak season for travel July
Flight distance 2,701.02 km
Average flight time 4 hours 5 minutes
Popular airline Delta Air Lines
Flight statistics for the Boston–San Juan route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com price insights on flights from Boston to San Juan

Which month has the cheapest one-way flights from Boston to San Juan?

The average price of one-way flights from Boston to San Juan purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from Boston to San Juan is January, with an average price of $153; while the month with the highest flight price is usually December, with an average price of up to $212.

$212
$183
$153
$124
    Cheapest
  • $209
    Jul
  • $183
    Aug
  • $209
    Sep
  • $179
    Oct
  • $209
    Nov
  • $212
    Dec
  • $153
    Jan
  • $208
    Feb
  • $178
    Mar
  • $176
    Apr
  • $181
    May
  • $195
    Jun

What is the cheapest month for round-trip flights from Boston to San Juan?

Average price of round-trip flights from Boston to San Juan purchased by Trip.com users by month over the past 12 months

According to historical data from Trip.com, the lowest prices for flights from Boston to San Juan are found during May, with an average price of $264. Conversely, the highest prices are found during December, with an average price of up to $658.

$658
$461
$264
$67
    Cheapest
  • $347
    Jul
  • $448
    Aug
  • $479
    Sep
  • $351
    Oct
  • $549
    Nov
  • $658
    Dec
  • $540
    Jan
  • $414
    Feb
  • $381
    Mar
  • $624
    Apr
  • $264
    May
  • $530
    Jun

Frequently Asked Questions

  • What are the cheapest flights from Boston to San Juan (BOS-SJU)?

    Based on Trip.com data, Delta Air Lines offers one-way fares as low as $142 on Cheapest nonstop routes (e.g. BOS to SJU on Tue, Sep 15), while Delta Air Lines offers Cheapest nonstop round-trips from $260 departing on Tue, Sep 8 and returning on Tue, Sep 15.
  • At the moment, you can catch a nonstop flight from Boston to San Juan with the following airlines, including: Delta Air Lines Jetblue Airways Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes around 4 hours 5 minutes to fly from Boston (BOS) to San Juan (SJU).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Boston to San Juan is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 24 flight per week flying from Boston to San Juan. You can check the weekly schedule for popular airlines on this route below: Jetblue Airways: S/M/T/W/T/F/S -- B6861 (10:41) Jetblue Airways: S/M/T/W/T/F/S -- B6761 (06:22) Delta Air Lines: S/M/T/W/T/F/S -- DL1780 (09:29)
  • To find best deals on flights from Boston to San Juan, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Sep 15, with one-way flights priced at just $142.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Delta Air Lines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for San Juan travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Boston to San Juan is October, when demand for travel is lower.
  • After crunching the numbers on our July flight calendar, it's currently cheapest to fly from Boston to San Juan on July 24, 2026 with Frontier Airlines, with prices starting at $276.
  • You can land at any one of the following hubs in San Juan, with Boston Logan International Airport to Luis Munoz Marin International Airport (BOS-SJU) is by far the most common option on this route: Luis Munoz Marin International Airport (SJU) Fernando Luis Ribas Dominicci Airport (SIG).
  • The time difference between San Juan and Boston is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.