Flight Reliability
DL 4453 · Delta Air Lines
Aspen → Atlanta (ASE–ATL)
47
Bring Snacks
WanderNerd Reliability Score
- 64%
- Arrive within 15 minutes
- 32 min
- Average arrival delay
- 2.6%
- Cancelled
- 0 min
- Median arrival delay
Based on 114 historical flights. Data through May 2026.
What the data says
Saturdays have been rough.
DL 4453 arrived on time 93% of the time on Wednesdays and just 35% on Saturdays. That gap is worth planning around.
Lagging the ASE–ATL route.
DL 4453 arrived on time 64% of the time, versus 74% across the ASE–ATL route.
Well behind the Delta Air Lines network.
DL 4453 arrived on time 64% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon63%(16 flights)
- Tue75%(16 flights)
- Wed93%(15 flights)
- Thu56%(16 flights)
- Fri57%(14 flights)
- Sat35%(17 flights)
- Sun69%(16 flights)
75%
Apr
Dec 33% → Apr 75% on time
| Month | On-time percentage | Flights |
|---|---|---|
| December 2025 | 33% | 12 |
| January 2026 | 80% | 30 |
| February 2026 | 54% | 26 |
| March 2026 | 63% | 30 |
| April 2026 | 75% | 12 |
- Departures on time
- 64%
- Diverted
- 0.9%
- Flights flown
- 110
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 114 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.