Boston (BOS) to San Juan (SJU) flights
JetBlue, Delta Air Lines fly nonstop from Boston Logan International Airport to Luis Munoz Marin International Airport, with about 27 flights a week in July 2026. The 1,674-mile flight takes about 4h 1m gate to gate.
- Distance
- 1,674 mi · 2,694 km
- Flight time
- 4h 1m
- Airlines
- 2
- Seats filled
- 86%
Airlines flying BOS to SJU
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| JetBlue | 20 | Airbus A320-100/200, Airbus A321, Airbus A220-300 | 174,456 | 4h 0m |
| Delta Air Lines | 7 | Airbus A321, Boeing 737-900ER, Boeing 737-800 | 64,132 | 4h 2m |
| Spirit AirlinesCeased operations 2026-05-02 | n/a | Airbus A321, Airbus A320-100/200, Airbus A320neo | 23,924 | 4h 2m |
| Frontier AirlinesSeasonal or ended | n/a | Airbus A321, Airbus A320neo | 6,008 | 4h 12m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
BOS to SJU flight schedule
5 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 6:00am and the last at 7:50pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| B6 761JetBlue | 6:00am | 10:00am | 31 | 88% |
| DL 1780Delta Air Lines | 8:50am | 12:57pm | 31 | 77% |
| B6 861JetBlue | 10:10am | 2:11pm | 31 | 73% |
| B6 261JetBlue | 1:14pm | 5:16pm | 4 | 67% |
| B6 561JetBlue | 7:50pm | 11:54pm | 31 | 49% |
Is BOS to SJU on time?
From September 2025 to August 2026, 67% of 1,717 flights arrived within 15 minutes of schedule and 3% were cancelled. Flights leaving around 6am were the most punctual (86%), those around 10am the least (58%). Most delay time was caused by late-arriving aircraft (35%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| JetBlue | 1,142 | 67% | 26 min | 2.8% |
| Delta Air Lines | 398 | 75% | 16 min | 1.5% |
| Spirit Airlines | 143 | 53% | 52 min | 8.4% |
| Frontier Airlines | 34 | 42% | 67 min | 2.9% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 5am to 6am | 79 | 78% | |
| 6am to 7am | 93 | 86% | |
| 7am to 8am | 80 | 75% | |
| 8am to 9am | 475 | 78% | |
| 9am to 10am | 57 | 63% | |
| 10am to 11am | 133 | 58% | |
| 11am to 12pm | 38 | 74% | |
| 12pm to 1pm | 133 | 68% | |
| 1pm to 2pm | 61 | 63% | |
| 3pm to 4pm | 105 | 59% | |
| 5pm to 6pm | 90 | 66% | |
| 6pm to 7pm | 105 | 59% | |
| 7pm to 8pm | 61 | 35% | |
| 8pm to 9pm | 48 | 50% | |
| 9pm to 10pm | 56 | 31% | |
| 10pm to 11pm | 52 | 60% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 178 | 26,230 | |
| September 2025 | 83 | 10,849 | |
| October 2025 | 94 | 12,624 | |
| November 2025 | 109 | 16,454 | |
| December 2025 | 169 | 28,317 | |
| January 2026 | 153 | 24,338 | |
| February 2026 | 166 | 29,033 | |
| March 2026 | 199 | 31,413 | |
| April 2026 | 186 | 28,547 | |
| May 2026 | 140 | 21,859 | |
| June 2026 | 126 | 19,572 | |
| July 2026 | 118 | 19,284 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.