Flight Reliability
DL 398 · Delta Air Lines
Denver → New York (DEN–LGA)98% of its flights flew this route. The rest (MCO–DTW) are included in these numbers.
- 87%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 2.0%
- Cancelled
- 13 min early
- Median arrival delay
Based on 255 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 398 arrived on time 92% of the time on Tuesdays. On Sundays: 79%.
Better than the DEN–LGA route average.
DL 398 arrived on time 87% of the time, versus 72% across the DEN–LGA route.
A bit ahead of the Delta Air Lines network.
DL 398 arrived on time 87% of the time, versus 81% across the Delta Air Lines network.
Recent months have been rougher.
DL 398 arrived on time 85% of the time over the last three months in the data, compared with 93% in the three months before that.
The breakdown
- Mon89%(36 flights)
- Tue92%(36 flights)
- Wed89%(36 flights)
- Thu89%(36 flights)
- Fri84%(37 flights)
- Sat86%(35 flights)
- Sun79%(34 flights)
- 6–9 AM87%(245 flights)
- 6–9 PM—(5 flights)
Jun 80% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 80% | 30 |
| July 2025 | 86% | 28 |
| August 2025 | 80% | 30 |
| September 2025 | 97% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 93% | 29 |
| December 2025 | 84% | 19 |
| April 2026 | 87% | 23 |
| May 2026 | 83% | 30 |
- Departures on time
- 88%
- Diverted
- 0%
- Flights flown
- 250
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 255 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.