Flight DL2521
Delta Air Lines flight DL2521
Looking for DL2521 in the air…
Minneapolis (MSP) to Raleigh/Durham (RDU)
Historically, this flight arrives 15+ minutes late 14% of the time, and when it is late the delay averages 52 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 85.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 52 min
- Flights arriving 15+ minutes late
- Flights tracked
- 182
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 74%
- Air traffic control & airport 15%
- Late-arriving aircraft 12%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Raleigh/Durham (RDU) to Minneapolis (MSP)
Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 78 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 83.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 78 min
- Flights arriving 15+ minutes late
- Flights tracked
- 182
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 42%
- Late-arriving aircraft 40%
- Air traffic control & airport 15%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
New York (JFK) to Sarasota/Bradenton (SRQ)
Historically, this flight arrives 15+ minutes late 17% of the time, and when it is late the delay averages 90 minutes. It was cancelled 5.9% of the time.
- On-time arrivals
- 83.5%
- Less than 15 minutes late
- Cancelled
- 5.9%
- Of scheduled flights
- Average delay when late
- 90 min
- Flights arriving 15+ minutes late
- Flights tracked
- 135
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 33%
- Extreme weather 29%
- Air traffic control & airport 21%
- Late-arriving aircraft 17%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sarasota/Bradenton (SRQ) to New York (JFK)
Historically, this flight arrives 15+ minutes late 25% of the time, and when it is late the delay averages 74 minutes. It was cancelled 5.9% of the time.
- On-time arrivals
- 74.8%
- Less than 15 minutes late
- Cancelled
- 5.9%
- Of scheduled flights
- Average delay when late
- 74 min
- Flights arriving 15+ minutes late
- Flights tracked
- 135
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 47%
- Late-arriving aircraft 42%
- Airline (crew, maintenance, cleaning) 11%
- Extreme weather 1%
- 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 | 76.7% | 60 |
| October 2025 | 100.0% | 56 |
| November 2025 | 86.5% | 52 |
| December 2025 | 83.3% | 26 |
| January 2026 | 79.6% | 56 |
| February 2026 | 80.4% | 56 |
| March 2026 | 72.9% | 62 |
| April 2026 | 82.1% | 60 |
| May 2026 | 88.5% | 52 |
| June 2026 | 76.1% | 46 |
| July 2026 | 78.7% | 48 |
| August 2026 | 83.3% | 60 |
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