Flight Reliability
DL 4950 · Delta Air Lines
Atlanta → MLI (ATL–MLI)
70
Usually Fine
WanderNerd Reliability Score
- 74%
- Arrive within 15 minutes
- 12 min
- Average arrival delay
- 2.7%
- Cancelled
- 2 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Tuesdays have been rough.
DL 4950 arrived on time 84% of the time on Thursdays and just 65% on Tuesdays. That gap is worth planning around.
Lagging the Delta Air Lines network.
DL 4950 arrived on time 74% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon65%(52 flights)
- Tue65%(51 flights)
- Wed83%(52 flights)
- Thu84%(50 flights)
- Fri77%(47 flights)
- Sat74%(50 flights)
- Sun68%(53 flights)
- 3–6 PM—(2 flights)
- 6–9 PM—(1 flights)
- 9 PM–12 AM73%(352 flights)
74%
May
Jun 68% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 68% | 28 |
| July 2025 | 66% | 29 |
| August 2025 | 71% | 31 |
| September 2025 | 83% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 72% | 29 |
| December 2025 | 55% | 31 |
| January 2026 | 83% | 30 |
| February 2026 | 75% | 28 |
| March 2026 | 57% | 28 |
| April 2026 | 86% | 29 |
| May 2026 | 74% | 31 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 355
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.