Flight DL644
Delta Air Lines flight DL644
Looking for DL644 in the air…
Houston (IAH) to Atlanta (ATL)
Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 113 minutes. It was cancelled 1.4% of the time.
- On-time arrivals
- 87.1%
- Less than 15 minutes late
- Cancelled
- 1.4%
- Of scheduled flights
- Average delay when late
- 113 min
- Flights arriving 15+ minutes late
- Flights tracked
- 72
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 78%
- Late-arriving aircraft 13%
- Air traffic control & airport 9%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Miami (MIA) to Detroit (DTW)
Historically, this flight arrives 15+ minutes late 18% of the time, and when it is late the delay averages 133 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 81.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 133 min
- Flights arriving 15+ minutes late
- Flights tracked
- 33
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 81%
- Airline (crew, maintenance, cleaning) 10%
- Air traffic control & airport 9%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Boston (BOS) to New York (LGA)
Historically, this flight arrives 15+ minutes late 10% of the time, and when it is late the delay averages 87 minutes. It was cancelled 3.3% of the time.
- On-time arrivals
- 89.7%
- Less than 15 minutes late
- Cancelled
- 3.3%
- Of scheduled flights
- Average delay when late
- 87 min
- Flights arriving 15+ minutes late
- Flights tracked
- 30
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 66%
- Airline (crew, maintenance, cleaning) 30%
- Air traffic control & airport 4%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Nashville (BNA) to Salt Lake City (SLC)
Only 13 flights on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 7.7%
- Of scheduled flights
- Average delay when late
- —
- Flights arriving 15+ minutes late
- Flights tracked
- 13
- Scheduled flights in the period
Chicago (ORD) to New York (JFK)
Only 5 flights on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 20.0%
- Of scheduled flights
- Average delay when late
- —
- Flights arriving 15+ minutes late
- Flights tracked
- 5
- Scheduled flights in the period
In the news
More headlines →-
Delta Air Lines' Boeing 757 Fleet Fell From 127 To 83 & Some Retired Jets Became Spare Parts
Simple Flying Delta Air Lines
-
Form 424B5 Delta Airlines For: 4 November By Investing.com
Investing.com Canada Delta Air Lines
-
The cabin as a growth engine: Delta Air Lines on personalisation, connectivity and onboard retail innovation
Future Travel Experience Delta Air Lines
-
Delta Air Lines CEO Vows To Fight Heathrow Move That Separates It From Virgin Atlantic
Live and Let's Fly Delta Air Lines
-
Heathrow’s plans to move operations affect Delta Air Lines
Travel Radar Delta Air Lines
-
Delta Air Lines Passenger Shouts “I Love Myself” As Police Haul Him Off—New Video Shows JFK Airport Arrest
View from the Wing Delta Air Lines
Headlines found by Google News; stories open on the publisher's site.
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 88.0% | 26 |
| October 2025 | 100.0% | 4 |
| November 2025 | 100.0% | 12 |
| December 2025 | 100.0% | 1 |
| January 2026 | 82.6% | 23 |
| February 2026 | 80.0% | 10 |
| March 2026 | 100.0% | 3 |
| April 2026 | 100.0% | 2 |
| June 2026 | 90.0% | 20 |
| July 2026 | 87.5% | 26 |
| August 2026 | 84.6% | 26 |
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