Flight Reliability
DL 2161 · Delta Air Lines
Grand Rapids → Atlanta (GRR–ATL)
92
Nerd Approved
WanderNerd Reliability Score
- 87%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 0.6%
- Cancelled
- 14 min early
- Median arrival delay
Based on 342 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 2161 arrived on time 92% of the time on Fridays. On Sundays: 80%.
A bit ahead of the Delta Air Lines network.
DL 2161 arrived on time 87% of the time, versus 81% across the Delta Air Lines network.
Trending in the right direction.
DL 2161 arrived on time 87% of the time over the last three months in the data, compared with 69% in the three months before that.
The breakdown
- Mon90%(49 flights)
- Tue88%(50 flights)
- Wed90%(48 flights)
- Thu86%(49 flights)
- Fri92%(49 flights)
- Sat83%(46 flights)
- Sun80%(49 flights)
- 6–9 AM87%(333 flights)
- 9 AM–12 PM—(7 flights)
90%
May
Jun 90% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 90% | 29 |
| July 2025 | 97% | 31 |
| August 2025 | 97% | 31 |
| September 2025 | 96% | 24 |
| October 2025 | 94% | 31 |
| November 2025 | 90% | 30 |
| December 2025 | 63% | 19 |
| January 2026 | 54% | 26 |
| February 2026 | 89% | 28 |
| March 2026 | 83% | 30 |
| April 2026 | 87% | 30 |
| May 2026 | 90% | 31 |
- Departures on time
- 90%
- Diverted
- 0%
- Flights flown
- 340
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 342 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.