Flights from Boston, MA to San Juan, PR

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Best Deals on Flights From Boston, MA (BOS) to San Juan, PR (SJU)

Aug 2026
from$152*
Last seen: 5 hours ago
One-way/Economy
Sep 2026
from$152*
Last seen: 2 hours ago
One-way/Economy
Oct 2026
from$174*
Last seen: 43 mins ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $152
cmp-daily-histogram-bars-legend-max-price-aria-label $395
Displaying fares for August-2026
  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    01

    Sat

    AUG

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    02

    Sun

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    03

    Mon

  • BOS–SJU, Aug 4, 2026: from $375
    04

    Tue

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    05

    Wed

  • BOS–SJU, Aug 6, 2026: from $357
    06

    Thu

  • BOS–SJU, Aug 7, 2026: from $395
    07

    Fri

  • BOS–SJU, Aug 8, 2026: from $335
    08

    Sat

  • BOS–SJU, Aug 9, 2026: from $343
    09

    Sun

  • BOS–SJU, Aug 10, 2026: from $338
    10

    Mon

  • BOS–SJU, Aug 11, 2026: from $269
    11

    Tue

  • BOS–SJU, Aug 12, 2026: from $269
    12

    Wed

  • BOS–SJU, Aug 13, 2026: from $296
    13

    Thu

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    14

    Fri

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    15

    Sat

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    16

    Sun

  • BOS–SJU, Aug 17, 2026: from $300
    17

    Mon

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    18

    Tue

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    19

    Wed

  • BOS–SJU, Aug 20, 2026: from $197
    20

    Thu

  • BOS–SJU, Aug 21, 2026: from $227
    21

    Fri

  • BOS–SJU, Aug 22, 2026: from $208
    22

    Sat

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    23

    Sun

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    24

    Mon

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    25

    Tue

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    26

    Wed

  • BOS–SJU, Aug 27, 2026: from $152
    27

    Thu

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    28

    Fri

  • BOS–SJU, Aug 29, 2026: from $158
    29

    Sat

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    30

    Sun

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    31

    Mon

    • Range$152-$395

    *Prices found by others in the previous 48 hours for round-trip flights. Prices shown may also require membership in our travel club, Discount Den.

    Flights Deals from Boston, MA to San Juan, PR on Frontier

    $
    Flights Deals from Boston, MA to San Juan, PR on Frontier
    From
    To
    Boston, MA (BOS)San Juan, PR (SJU)One-way
    /
    Discount Den Basic Fare    		Departing Nov 12, 2026

    From

    $164

    Last seen: 17 hours ago

    *Prices found by others in the previous 48 hours for one-way flights. Prices shown may also require membership in our travel club, Discount Den®.

    Boston, MA San Juan, PR

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