Flight Reliability
AS 1242 · Alaska Airlines
Ontario → Seattle (ONT–SEA)
56
A Little Dicey
WanderNerd Reliability Score
- 59%
- Arrive within 15 minutes
- 17 min
- Average arrival delay
- 2.0%
- Cancelled
- 12 min
- Median arrival delay
Based on 50 historical flights. Data through May 2026.
What the data says
Well behind the ONT–SEA route.
AS 1242 arrived on time 59% of the time, versus 87% across the ONT–SEA route.
Well behind the Alaska Airlines network.
AS 1242 arrived on time 59% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon—(6 flights)
- Tue—(8 flights)
- Wed—(7 flights)
- Thu—(7 flights)
- Fri—(7 flights)
- Sat—(7 flights)
- Sun—(7 flights)
- Departures on time
- 69%
- Diverted
- 0%
- Flights flown
- 49
- Months covered
- 2
Same route, other flights
Keep nerding
Based on 50 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.