Flight Reliability
DL 311 · Delta Air Lines
Los Angeles → Kailua-Kona (LAX–KOA)
86
Pretty Reliable
WanderNerd Reliability Score
- 83%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 1.4%
- Cancelled
- 8 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
The 3–6 PM departure wins.
DL 311 departing between 3–6 PM arrived on time 87% of the time, versus 76% between 12–3 PM.
Saturday is the weak spot.
DL 311 arrived on time 86% of the time on Mondays. On Saturdays: 78%.
Trending in the right direction.
DL 311 arrived on time 84% of the time over the last three months in the data, compared with 72% in the three months before that.
The breakdown
- Mon86%(51 flights)
- Tue84%(51 flights)
- Wed83%(52 flights)
- Thu83%(52 flights)
- Fri86%(51 flights)
- Sat78%(51 flights)
- Sun81%(52 flights)
- 12–3 PM76%(134 flights)
- 3–6 PM87%(226 flights)
90%
May
Jun 93% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 93% | 30 |
| July 2025 | 90% | 30 |
| August 2025 | 94% | 31 |
| September 2025 | 87% | 30 |
| October 2025 | 87% | 31 |
| November 2025 | 77% | 30 |
| December 2025 | 61% | 31 |
| January 2026 | 90% | 30 |
| February 2026 | 64% | 28 |
| March 2026 | 79% | 28 |
| April 2026 | 83% | 30 |
| May 2026 | 90% | 31 |
- Departures on time
- 80%
- Diverted
- 0%
- Flights flown
- 360
- 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.