Flight Reliability
AS 1235 · Alaska Airlines
Portland → Denver (PDX–DEN)98% of its flights flew this route. The rest (OGG–HNL) are included in these numbers.
36
Bring Snacks
WanderNerd Reliability Score
- 50%
- Arrive within 15 minutes
- 33 min
- Average arrival delay
- 0.9%
- Cancelled
- 15 min
- Median arrival delay
Based on 111 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
AS 1235 arrived on time 71% of the time on Sundays and just 33% on Fridays. That gap is worth planning around.
Well behind the PDX–DEN route.
AS 1235 arrived on time 50% of the time, versus 81% across the PDX–DEN route.
Well behind the Alaska Airlines network.
AS 1235 arrived on time 50% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon39%(18 flights)
- Tue50%(12 flights)
- Wed46%(11 flights)
- Thu50%(20 flights)
- Fri33%(18 flights)
- Sat67%(12 flights)
- Sun71%(17 flights)
- 12–3 PM50%(107 flights)
- 9 PM–12 AM—(1 flights)
65%
Oct
Jun 47% → Oct 65% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 47% | 19 |
| July 2025 | 33% | 27 |
| August 2025 | 54% | 26 |
| September 2025 | 53% | 17 |
| October 2025 | 65% | 17 |
- Departures on time
- 64%
- Diverted
- 1.8%
- Flights flown
- 108
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 111 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.