Flight DL1780
Delta Air Lines flight DL1780
Looking for DL1780 in the air…
Boston (BOS) to San Juan (SJU)
Historically, this flight arrives 15+ minutes late 24% of the time, and when it is late the delay averages 57 minutes. It was cancelled 1.1% of the time.
- On-time arrivals
- 76.5%
- Less than 15 minutes late
- Cancelled
- 1.1%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 365
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 37%
- Airline (crew, maintenance, cleaning) 36%
- Late-arriving aircraft 23%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Juan (SJU) to Boston (BOS)
Historically, this flight arrives 15+ minutes late 21% of the time, and when it is late the delay averages 62 minutes. It was cancelled 0.9% of the time.
- On-time arrivals
- 79.3%
- Less than 15 minutes late
- Cancelled
- 0.9%
- Of scheduled flights
- Average delay when late
- 62 min
- Flights arriving 15+ minutes late
- Flights tracked
- 324
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 57%
- Airline (crew, maintenance, cleaning) 28%
- Air traffic control & airport 15%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 67.5% | 40 |
| October 2025 | 75.4% | 57 |
| November 2025 | 83.3% | 60 |
| December 2025 | 80.0% | 50 |
| January 2026 | 71.7% | 58 |
| February 2026 | 70.4% | 56 |
| March 2026 | 71.0% | 62 |
| April 2026 | 73.3% | 60 |
| May 2026 | 85.5% | 62 |
| June 2026 | 83.1% | 60 |
| July 2026 | 83.6% | 62 |
| August 2026 | 83.9% | 62 |
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