Flight Reliability
AS 1428 · Alaska Airlines
Denver → San Diego (DEN–SAN)99% of its flights flew this route. The rest (SEA–IND) are included in these numbers.
74
Usually Fine
WanderNerd Reliability Score
- 74%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 1.2%
- Cancelled
- 6 min early
- Median arrival delay
Based on 162 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
AS 1428 arrived on time 91% of the time on Tuesdays and just 54% on Sundays. That gap is worth planning around.
A bit behind the Alaska Airlines network.
AS 1428 arrived on time 74% of the time, versus 80% across the Alaska Airlines network.
Trending in the right direction.
AS 1428 arrived on time 81% of the time over the last three months in the data, compared with 64% in the three months before that.
The breakdown
- Mon81%(26 flights)
- Tue91%(21 flights)
- Wed84%(19 flights)
- Thu67%(24 flights)
- Fri75%(24 flights)
- Sat68%(19 flights)
- Sun54%(26 flights)
- 6–9 PM73%(158 flights)
- 9 PM–12 AM—(1 flights)
86%
Apr
Nov 66% → Apr 86% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 66% | 29 |
| December 2025 | 68% | 31 |
| January 2026 | 60% | 20 |
| February 2026 | 83% | 23 |
| March 2026 | 76% | 29 |
| April 2026 | 86% | 21 |
- Departures on time
- 80%
- Diverted
- 0.6%
- Flights flown
- 159
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 162 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.