Historical on-time performance
St. Thomas to Boston
1,693 miData through May 2026Source: US DOT · BTS
Flights on STT–BOS arrive on time 68% of the time over the last 12 months.
On-time rate68%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled6.5%of scheduled flights
based on 62 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time68%Medianon timep9025 minCancel6.5%Flights62
Why flights run late
Delay causes
- Airline16%
- Weather0%
- Air traffic (NAS)21%
- Late aircraft64%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline25%
- Weather50%
- Air traffic (NAS)0%
- Security25%
Most cancellations here are attributed to Weather. Shares are among 4 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
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