Flights from Boston, MA to San Juan, PR

Promo Code

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

Sep 2026
from$237*
Last seen: 3 hours ago
One-way/Economy
Oct 2026
from$169*
Last seen: 6 hours ago
One-way/Economy
Nov 2026
from$167*
Last seen: 1 hour ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $207
cmp-daily-histogram-bars-legend-max-price-aria-label $471
Displaying fares for September-2026
  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    16

    Wed

    SEP

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    17

    Thu

  • BOS–SJU, Sep 18, 2026: from $430
    18

    Fri

  • BOS–SJU, Sep 19, 2026: from $392
    19

    Sat

  • BOS–SJU, Sep 20, 2026: from $328
    20

    Sun

  • BOS–SJU, Sep 21, 2026: from $353
    21

    Mon

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    22

    Tue

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

    Wed

  • BOS–SJU, Sep 24, 2026: from $237
    24

    Thu

  • BOS–SJU, Sep 25, 2026: from $237
    25

    Fri

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

    Sat

  • BOS–SJU, Sep 27, 2026: from $237
    27

    Sun

  • BOS–SJU, Sep 28, 2026: from $353
    28

    Mon

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    29

    Tue

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

    Wed

  • BOS–SJU, Oct 1, 2026: from $207
    01

    Thu

    OCT

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

    Fri

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

    Sat

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

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

    Mon

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    06

    Tue

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    07

    Wed

  • BOS–SJU, Oct 8, 2026: from $471
    08

    Thu

  • BOS–SJU, Oct 9, 2026: from $368
    09

    Fri

  • BOS–SJU, Oct 10, 2026: from $237
    10

    Sat

  • BOS–SJU, Oct 11, 2026: from $383
    11

    Sun

  • BOS–SJU, Oct 12, 2026: from $365
    12

    Mon

  • BOS–SJU: cmp-view-offers-disclaimer. Find Offers
    13

    Tue

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

    Wed

  • BOS–SJU, Oct 15, 2026: from $232
    15

    Thu

    • Range$207-$471

    *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 Jan 4, 2027

    From

    $184

    Last seen: 22 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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