Flight Reliability
AS 1438 · Alaska Airlines
Ontario → Portland (ONT–PDX)94% of its flights flew this route. The rest (RNO–SEA, SAT–SEA) are included in these numbers.
82
Pretty Reliable
WanderNerd Reliability Score
- 87%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 3.2%
- Cancelled
- 9 min early
- Median arrival delay
Based on 31 historical flights. Data through May 2026.
What the data says
A bit behind the ONT–PDX route.
AS 1438 arrived on time 87% of the time, versus 90% across the ONT–PDX route.
A bit ahead of the Alaska Airlines network.
AS 1438 arrived on time 87% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon—(5 flights)
- Tue—(4 flights)
- Wed—(5 flights)
- Thu—(3 flights)
- Fri—(4 flights)
- Sat—(4 flights)
- Sun—(5 flights)
- 6–9 AM—(1 flights)
- 6–9 PM86%(29 flights)
- Departures on time
- 87%
- Diverted
- 0%
- Flights flown
- 30
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 31 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.