Flight Reliability
AS 1478 · Alaska Airlines
San Diego → Chicago (SAN–ORD)93% of its flights flew this route. The rest (SEA–ANC) are included in these numbers.
- 65%
- Arrive within 15 minutes
- 16 min
- Average arrival delay
- 2.0%
- Cancelled
- 8 min
- Median arrival delay
Based on 149 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
AS 1478 departing between 12–3 PM arrived on time 66% of the time, versus 46% between 9 PM–12 AM.
Friday is doing you no favors.
AS 1478 arrived on time 94% of the time on Tuesdays and just 48% on Fridays. That gap is worth planning around.
Lagging the SAN–ORD route.
AS 1478 arrived on time 65% of the time, versus 79% across the SAN–ORD route.
Well behind the Alaska Airlines network.
AS 1478 arrived on time 65% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon63%(19 flights)
- Tue94%(17 flights)
- Wed62%(21 flights)
- Thu65%(20 flights)
- Fri48%(23 flights)
- Sat63%(19 flights)
- Sun65%(23 flights)
- 12–3 PM66%(131 flights)
- 9 PM–12 AM46%(11 flights)
Nov 69% → May 72% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 69% | 26 |
| December 2025 | 39% | 28 |
| March 2026 | 55% | 22 |
| April 2026 | 80% | 25 |
| May 2026 | 72% | 29 |
- Departures on time
- 66%
- Diverted
- 2.7%
- Flights flown
- 142
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 149 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.