Flight Reliability
DL 601 · Delta Air Lines
New York → Las Vegas (JFK–LAS)
86
Pretty Reliable
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 1.5%
- Cancelled
- 6 min early
- Median arrival delay
Based on 194 historical flights. Data through May 2026.
What the data says
Thursdays have been rough.
DL 601 arrived on time 96% of the time on Mondays and just 78% on Thursdays. That gap is worth planning around.
A bit ahead of the JFK–LAS route.
DL 601 arrived on time 86% of the time, versus 80% across the JFK–LAS route.
A bit ahead of the Delta Air Lines network.
DL 601 arrived on time 86% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon96%(28 flights)
- Tue89%(27 flights)
- Wed86%(28 flights)
- Thu78%(27 flights)
- Fri85%(26 flights)
- Sat85%(27 flights)
- Sun82%(27 flights)
89%
Dec
Jun 91% → Dec 89% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 91% | 23 |
| July 2025 | 83% | 30 |
| August 2025 | 90% | 30 |
| September 2025 | 83% | 30 |
| October 2025 | 87% | 30 |
| November 2025 | 79% | 29 |
| December 2025 | 89% | 18 |
- Departures on time
- 89%
- Diverted
- 0.5%
- Flights flown
- 190
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 194 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.