Flight Reliability
AS 863 · Alaska Airlines
Portland → Spokane (PDX–GEG)95% of its flights flew this route. The rest (SJC–LIH) are included in these numbers.
91
Nerd Approved
WanderNerd Reliability Score
- 83%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 0%
- Cancelled
- 1 min
- Median arrival delay
Based on 125 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
AS 863 arrived on time 95% of the time on Tuesdays and just 68% on Fridays. That gap is worth planning around.
A bit behind the PDX–GEG route.
AS 863 arrived on time 83% of the time, versus 87% across the PDX–GEG route.
It basically never cancels.
Out of 125 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon90%(19 flights)
- Tue95%(21 flights)
- Wed79%(19 flights)
- Thu79%(19 flights)
- Fri68%(19 flights)
- Sat—(7 flights)
- Sun81%(21 flights)
- 6–9 AM—(6 flights)
- 9 AM–12 PM82%(119 flights)
75%
Oct
Jun 86% → Oct 75% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 86% | 22 |
| July 2025 | 85% | 27 |
| August 2025 | 82% | 28 |
| September 2025 | 86% | 28 |
| October 2025 | 75% | 20 |
- Departures on time
- 89%
- Diverted
- 0%
- Flights flown
- 125
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 125 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.