Route
STT → BOS
Cyril E. King Airport Boston Logan International Airport
1,693 miles
Return route BOS → STT →
How punctual is this route?
- On-time arrivals
- 78.8%
- Less than 15 minutes late
- Cancelled
- 4.7%
- Of scheduled flights
- Average delay when late
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 127
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 54%
- Airline (crew, maintenance, cleaning) 29%
- Air traffic control & airport 18%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dec 2025
Apr 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| December 2025 | 90.9% | 12 |
| January 2026 | 87.5% | 31 |
| February 2026 | 57.7% | 28 |
| March 2026 | 75.0% | 31 |
| April 2026 | 91.7% | 25 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Delta Air Lines | 127 | 78.8% | 4.7% | 72 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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