Flight Reliability
DL 1038 · Delta Air Lines
Raleigh–Durham → Fort Lauderdale (RDU–FLL)
81
Pretty Reliable
WanderNerd Reliability Score
- 80%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0.8%
- Cancelled
- 5 min early
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
Mornings have a slight edge.
Departures between 9 AM–12 PM arrived on time 85% of the time, against 79% between 12–3 PM.
Sunday scaries are real for this one.
DL 1038 arrived on time 85% of the time on Tuesdays and just 69% on Sundays. That gap is worth planning around.
Ticking up lately.
DL 1038 arrived on time 79% of the time over the last three months in the data, compared with 75% in the three months before that.
The breakdown
- Mon84%(50 flights)
- Tue85%(52 flights)
- Wed82%(51 flights)
- Thu82%(51 flights)
- Fri85%(52 flights)
- Sat70%(50 flights)
- Sun69%(52 flights)
- 9 AM–12 PM85%(40 flights)
- 12–3 PM79%(318 flights)
80%
May
Jun 86% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 86% | 29 |
| July 2025 | 60% | 30 |
| August 2025 | 79% | 29 |
| September 2025 | 80% | 30 |
| October 2025 | 100% | 31 |
| November 2025 | 86% | 29 |
| December 2025 | 74% | 31 |
| January 2026 | 70% | 30 |
| February 2026 | 82% | 28 |
| March 2026 | 71% | 31 |
| April 2026 | 87% | 30 |
| May 2026 | 80% | 30 |
- Departures on time
- 84%
- Diverted
- 0.8%
- Flights flown
- 358
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 364 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.