Boston (BOS) – San Juan (SJU)
- Distance
- 2,694 km
- 1,674 mi · 1,455 nm
- Flight time
- 4 h 1 min / 4 h 7 min
- Average gate to gate: BOS → SJU / back
- Time difference
- 1 h / none
- January / July
- CO2 per passenger
- 340 kg
- One way, economy, incl. RF (201 kg CO2 only)
- Passengers / year
- 536,111
- Aug 2025 – Jul 2026 · −15.4%
- Flights / week
- 66
- Both directions, average
- Seats filled
- 86%
- 622,145 seats a year
- Airlines nonstop
- 4
- B6, DL, NK
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from BOS
- 168°
- Heading from SJU
- 351°
- Halfway point
- 30.44, -68.19
- Great-circle km
- 2,702 km (sphere, for EU261)
- In the air BOS → SJU
- 3 h 34 min
- In the air SJU → BOS
- 3 h 45 min
- Clocks
- 1 h in January, none in July
The estimate for a route without real times is 4 h; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 55,330 |
| Sep 2025 | 24,004 |
| Oct 2025 | 25,110 |
| Nov 2025 | 32,271 |
| Dec 2025 | 49,341 |
| Jan 2026 | 50,611 |
| Feb 2026 | 54,781 |
| Mar 2026 | 65,963 |
| Apr 2026 | 57,447 |
| May 2026 | 44,684 |
| Jun 2026 | 38,541 |
| Jul 2026 | 38,028 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 357 |
| Sep 2025 | 167 |
| Oct 2025 | 187 |
| Nov 2025 | 216 |
| Dec 2025 | 335 |
| Jan 2026 | 308 |
| Feb 2026 | 332 |
| Mar 2026 | 399 |
| Apr 2026 | 373 |
| May 2026 | 280 |
| Jun 2026 | 251 |
| Jul 2026 | 233 |
Airlines flying BOS–SJU nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| B6JetBlue Airways | 45 | 65% |
| DLDelta Air Lines | 15 | 24% |
| NKSpirit Air Lines | 5.3 | 9% |
| F9Frontier Airlines | 1.3 | 2% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Airbus Industrie A320-100/200 · 1,143 flights
- Airbus Industrie A321Neoxlr · 973 flights
- Airbus Industrie A321-200n · 886 flights
- A220-300 BD-500-1A11 · 367 flights
- Airbus Industrie A320-200n · 39 flights
- Boeing 737-900ER · 26 flights
- Boeing 737-800 · 4 flights
Also carried: 364 tonnes of freight and 39 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 69.3%
- Arrived within 15 min of schedule
- Average delay
- 24 min
- Late arrivals count, early ones as 0
- Cancelled
- 3%
- Flights counted
- 3,731
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| B6JetBlue Airways | 68.2% | 25 min |
| DLDelta Air Lines | 76% | 16 min |
| NKSpirit Air Lines | 63.2% | 33 min |
| F9Frontier Airlines | 56.1% | 41 min |
Delay minutes by cause: airline 30% · aircraft arriving late 41% · air traffic system 27% · weather 2% · security 0%.
Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 2,702 km.
Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.
Every airport pair between Boston and San Juan
Kilometres. Linked numbers have a page of their own. All San Juan airports