Flight Reliability
AS 653 · Alaska Airlines
Salt Lake City → Seattle (SLC–SEA)84% of its flights flew this route. The rest (PSP–SEA, SEA–PHX) are included in these numbers.
- 92%
- Arrive within 15 minutes
- 6 min early
- Average arrival delay
- 1.5%
- Cancelled
- 10 min early
- Median arrival delay
Based on 135 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
AS 653 departing between 6–9 PM arrived on time 100% of the time, versus 90% between 3–6 AM.
Friday is doing you no favors.
AS 653 arrived on time 100% of the time on Tuesdays and just 84% on Fridays. That gap is worth planning around.
Better than the SLC–SEA route average.
AS 653 arrived on time 92% of the time, versus 80% across the SLC–SEA route.
Better than the Alaska Airlines network average.
AS 653 arrived on time 92% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon90%(20 flights)
- Tue100%(16 flights)
- Wed100%(15 flights)
- Thu95%(21 flights)
- Fri84%(19 flights)
- Sat91%(21 flights)
- Sun86%(21 flights)
- 3–6 AM90%(19 flights)
- 6–9 AM90%(93 flights)
- 6–9 PM100%(21 flights)
Dec 83% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| December 2025 | 83% | 12 |
| January 2026 | 79% | 24 |
| February 2026 | 88% | 24 |
| March 2026 | 97% | 30 |
| April 2026 | 100% | 30 |
| May 2026 | 100% | 11 |
- Departures on time
- 93%
- Diverted
- 0%
- Flights flown
- 133
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 135 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.