Flight Reliability
DL 1033 · Delta Air Lines
Raleigh–Durham → Boston (RDU–BOS)90% of its flights flew this route. The rest (ATL–HOU, HOU–ATL) are included in these numbers.
- 76%
- Arrive within 15 minutes
- 11 min
- Average arrival delay
- 1.6%
- Cancelled
- 9 min early
- Median arrival delay
Based on 313 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
DL 1033 arrived on time 91% of the time on Saturdays and just 72% on Wednesdays. That gap is worth planning around.
A bit behind the Delta Air Lines network.
DL 1033 arrived on time 76% of the time, versus 81% across the Delta Air Lines network.
Recent months have been rougher.
DL 1033 arrived on time 81% of the time over the last three months in the data, compared with 89% in the three months before that.
The breakdown
- Mon74%(50 flights)
- Tue76%(54 flights)
- Wed72%(54 flights)
- Thu75%(52 flights)
- Fri78%(50 flights)
- Sat91%(21 flights)
- Sun78%(27 flights)
- 12–3 PM76%(284 flights)
- 3–6 PM75%(24 flights)
Jun 77% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 77% | 26 |
| July 2025 | 67% | 27 |
| August 2025 | 78% | 27 |
| September 2025 | 64% | 25 |
| October 2025 | 46% | 26 |
| November 2025 | 77% | 26 |
| December 2025 | 87% | 39 |
| January 2026 | 89% | 27 |
| February 2026 | 90% | 19 |
| March 2026 | 77% | 22 |
| April 2026 | 84% | 19 |
| May 2026 | 80% | 25 |
- Departures on time
- 77%
- Diverted
- 0%
- Flights flown
- 308
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 313 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.