Spirit Airlines BOS to SJU on-time performance
Spirit Airlines nonstop flights from Boston to San Juan · Aug 2025 – Jul 2026
On-time arrivals
53%
arrived < 15 min late
Cancelled
8.2%
12 flights
Avg arrival delay
51 min
106 min when late
Rank on route
#3 of 4
route average 67% on time
Key facts
- Spirit Airlines flights on BOS to SJU arrived on time 53% of the time in Aug 2025 – Jul 2026.
- 8.2% were cancelled, and 21% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 67% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (48%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion48%
- Airline (crew, maintenance, cleaning, fueling)31%
- Late-arriving aircraft20%
- Extreme weather1%
- Security0%
Other airlines on BOS to SJU
- JetBlue67% on time · 25 min avg delay
- Delta Air Lines75% on time · 16 min avg delay
- Frontier Airlines42% on time · 67 min avg delay
Full BOS to SJU comparison →
Spirit Airlines on-time record across all routes →
146 Spirit Airlines flights tracked on this route; 12 cancelled, 0 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.