Flight Reliability
DL 3691 · Delta Air Lines
Los Angeles → Denver (LAX–DEN)
85
Pretty Reliable
WanderNerd Reliability Score
- 77%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0%
- Cancelled
- 4 min early
- Median arrival delay
Based on 119 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
DL 3691 arrived on time 89% of the time on Wednesdays and just 67% on Mondays. That gap is worth planning around.
A bit behind the LAX–DEN route.
DL 3691 arrived on time 77% of the time, versus 82% across the LAX–DEN route.
A bit behind the Delta Air Lines network.
DL 3691 arrived on time 77% of the time, versus 81% across the Delta Air Lines network.
It basically never cancels.
Out of 119 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon67%(18 flights)
- Tue72%(18 flights)
- Wed89%(18 flights)
- Thu77%(17 flights)
- Fri71%(17 flights)
- Sat73%(15 flights)
- Sun88%(16 flights)
80%
Apr
Jan 92% → Apr 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| January 2026 | 92% | 24 |
| February 2026 | 75% | 28 |
| March 2026 | 65% | 31 |
| April 2026 | 80% | 30 |
- Departures on time
- 80%
- Diverted
- 0%
- Flights flown
- 119
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 119 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.