Travel with Axel,
get the best price.

San Juan → Boston

Dec 21, 2026 · return Dec 27, 2026

SJU → BOS1 adulteconomyRound trip

10 flight options · 5 airlines

Nonstop flights

Mon, Dec 21 – Sun, Dec 27

Frontier Airlines
6:11 amSJU
4h 19m
Nonstop
9:30 amBOS
Frontier Airlines
10:25 amBOS
4h 5m
Nonstop
3:30 pmSJU

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

JetBlue Airways
5:01 amSJU
4h 12m
Nonstop
8:13 amBOS
JetBlue Airways
2:21 pmBOS
4h 6m
Nonstop
7:27 pmSJU

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

Delta Air Lines
2:55 pmSJU
4h 16m
Nonstop
6:11 pmBOS
Delta Air Lines
8:40 amBOS
4h 3m
Nonstop
1:43 pmSJU

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

JetBlue Airways
7:00 amSJU
4h 13m
Nonstop
10:13 amBOS
JetBlue Airways
2:21 pmBOS
4h 6m
Nonstop
7:27 pmSJU

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Sun, Dec 27

American Airlines
8:30 amSJU
8h 31m
PHL · 2h 51m
4:01 pmBOS
American Airlines
4:00 pmBOS
7h 11m
PHL · 1h 25m
12:11 am+1SJU

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

United Airlines
2:52 pmSJU
8h 7m
EWR · 2h 25m
9:59 pmBOS
United Airlines
3:42 pmBOS
7h 54m
EWR · 2h 28m
12:36 am+1SJU

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

JetBlue Airways
3:40 pmSJU
8h 19m
FLL · 2h 9m
10:59 pmBOS
JetBlue Airways
2:21 pmBOS
4h 6m
Nonstop
7:27 pmSJU

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

JetBlue Airways
5:01 amSJU
4h 14m
Nonstop
8:15 amBOS
JetBlue Airways
12:22 pmBOS
7h 2m
PUJ · 1h 58m
8:24 pmSJU

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

JetBlue Airways
7:40 amSJU
7h 20m
PHL · 2h 3m
2:00 pmBOS
JetBlue Airways
2:21 pmBOS
4h 6m
Nonstop
7:27 pmSJU

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

Delta Air Lines
4:00 amSJU
8h 13m
JFK · 2h 38m
11:13 amBOS
Delta Air Lines
8:40 amBOS
4h 3m
Nonstop
1:43 pmSJU

Round-trip total · 1 adult · Taxes included

Make this trip yours

SJU ⇄ BOS

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Frontier Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-21 → 2026-12-27Frontier AirlinesF93002 / F93001$333.502026-10-29T01:23:02Z
2026-12-21 → 2026-12-27JetBlue AirwaysB6162 / B6161$543.762026-10-29T01:23:02Z
2026-12-21 → 2026-12-27Delta Air LinesDL1780 / DL1780$601.762026-10-29T01:23:02Z
2026-12-21 → 2026-12-27American AirlinesAA508 + AA4599 / AA1198 + AA507$565.502026-10-29T01:23:02Z
2026-12-21 → 2026-12-27United AirlinesUA1173 + UA2691 / UA546 + UA1543$580.002026-10-29T01:23:02Z
2026-12-21 → 2026-12-27JetBlue AirwaysB6562 / B6161$543.762026-10-29T01:23:02Z
2026-12-21 → 2026-12-27JetBlue AirwaysB62252 + B6770 / B6161$518.382026-10-29T01:23:02Z
2026-12-21 → 2026-12-27JetBlue AirwaysB6162 / B6295 + B62932$518.382026-10-29T01:23:02Z
2026-12-21 → 2026-12-27JetBlue AirwaysB61048 + B6560 / B6161$518.382026-10-29T01:23:02Z
2026-12-21 → 2026-12-27Delta Air LinesDL1022 + DL5733 / DL1780$580.012026-10-29T01:23:02Z

2026-12-21 → 2026-12-27 · $333.50

  • Frontier Airlines F93002: SJU 2026-12-21 06:11:00 → BOS 2026-12-21 09:30:00; nonstop; 259 minutes. Local airport times.
  • Frontier Airlines F93001: BOS 2026-12-27 10:25:00 → SJU 2026-12-27 15:30:00; nonstop; 245 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $543.76

  • JetBlue Airways B6162: SJU 2026-12-21 05:01:00 → BOS 2026-12-21 08:13:00; nonstop; 252 minutes. Local airport times.
  • JetBlue Airways B6161: BOS 2026-12-27 14:21:00 → SJU 2026-12-27 19:27:00; nonstop; 246 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $601.76

  • Delta Air Lines DL1780: SJU 2026-12-21 14:55:00 → BOS 2026-12-21 18:11:00; nonstop; 256 minutes. Local airport times.
  • Delta Air Lines DL1780: BOS 2026-12-27 08:40:00 → SJU 2026-12-27 13:43:00; nonstop; 243 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $565.50

  • American Airlines AA508 / AA4599: SJU 2026-12-21 08:30:00 → BOS 2026-12-21 16:01:00; 1 stop(s) via PHL; 511 minutes. Local airport times.
    • AA508: SJU 2026-12-21 08:30:00 → PHL 2026-12-21 11:39:00; layover at PHL: 171 minutes.
    • AA4599: PHL 2026-12-21 14:30:00 → BOS 2026-12-21 16:01:00.
  • American Airlines AA1198 / AA507: BOS 2026-12-27 16:00:00 → SJU 2026-12-28 00:11:00; 1 stop(s) via PHL; 431 minutes. Local airport times.
    • AA1198: BOS 2026-12-27 16:00:00 → PHL 2026-12-27 17:40:00; layover at PHL: 85 minutes.
    • AA507: PHL 2026-12-27 19:05:00 → SJU 2026-12-28 00:11:00.

2026-12-21 → 2026-12-27 · $580.00

  • United Airlines UA1173 / UA2691: SJU 2026-12-21 14:52:00 → BOS 2026-12-21 21:59:00; 1 stop(s) via EWR; 487 minutes. Local airport times.
    • UA1173: SJU 2026-12-21 14:52:00 → EWR 2026-12-21 18:10:00; layover at EWR: 145 minutes.
    • UA2691: EWR 2026-12-21 20:35:00 → BOS 2026-12-21 21:59:00.
  • United Airlines UA546 / UA1543: BOS 2026-12-27 15:42:00 → SJU 2026-12-28 00:36:00; 1 stop(s) via EWR; 474 minutes. Local airport times.
    • UA546: BOS 2026-12-27 15:42:00 → EWR 2026-12-27 17:08:00; layover at EWR: 148 minutes.
    • UA1543: EWR 2026-12-27 19:36:00 → SJU 2026-12-28 00:36:00.

2026-12-21 → 2026-12-27 · $543.76

  • JetBlue Airways B6562: SJU 2026-12-21 07:00:00 → BOS 2026-12-21 10:13:00; nonstop; 253 minutes. Local airport times.
  • JetBlue Airways B6161: BOS 2026-12-27 14:21:00 → SJU 2026-12-27 19:27:00; nonstop; 246 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $518.38

  • JetBlue Airways B62252 / B6770: SJU 2026-12-21 15:40:00 → BOS 2026-12-21 22:59:00; 1 stop(s) via FLL; 499 minutes. Local airport times.
    • B62252: SJU 2026-12-21 15:40:00 → FLL 2026-12-21 17:31:00; layover at FLL: 129 minutes.
    • B6770: FLL 2026-12-21 19:40:00 → BOS 2026-12-21 22:59:00.
  • JetBlue Airways B6161: BOS 2026-12-27 14:21:00 → SJU 2026-12-27 19:27:00; nonstop; 246 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $518.38

  • JetBlue Airways B6162: SJU 2026-12-21 05:01:00 → BOS 2026-12-21 08:15:00; nonstop; 254 minutes. Local airport times.
  • JetBlue Airways B6295 / B62932: BOS 2026-12-27 12:22:00 → SJU 2026-12-27 20:24:00; 1 stop(s) via PUJ; 422 minutes. Local airport times.
    • B6295: BOS 2026-12-27 12:22:00 → PUJ 2026-12-27 17:32:00; layover at PUJ: 118 minutes.
    • B62932: PUJ 2026-12-27 19:30:00 → SJU 2026-12-27 20:24:00.

2026-12-21 → 2026-12-27 · $518.38

  • JetBlue Airways B61048 / B6560: SJU 2026-12-21 07:40:00 → BOS 2026-12-21 14:00:00; 1 stop(s) via PHL; 440 minutes. Local airport times.
    • B61048: SJU 2026-12-21 07:40:00 → PHL 2026-12-21 10:40:00; layover at PHL: 123 minutes.
    • B6560: PHL 2026-12-21 12:43:00 → BOS 2026-12-21 14:00:00.
  • JetBlue Airways B6161: BOS 2026-12-27 14:21:00 → SJU 2026-12-27 19:27:00; nonstop; 246 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $580.01

  • Delta Air Lines DL1022 / DL5733: SJU 2026-12-21 04:00:00 → BOS 2026-12-21 11:13:00; 1 stop(s) via JFK; 493 minutes. Local airport times.
    • DL1022: SJU 2026-12-21 04:00:00 → JFK 2026-12-21 07:12:00; layover at JFK: 158 minutes.
    • DL5733: JFK 2026-12-21 09:50:00 → BOS 2026-12-21 11:13:00.
  • Delta Air Lines DL1780: BOS 2026-12-27 08:40:00 → SJU 2026-12-27 13:43:00; nonstop; 243 minutes. Local airport times.

More dates for this route