Flight AS1421
Alaska Airlines flight AS1421
Looking for AS1421 in the air…
Houston (IAH) to Portland (PDX)
Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 66 minutes. It was cancelled 1.1% of the time.
- On-time arrivals
- 77.5%
- Less than 15 minutes late
- Cancelled
- 1.1%
- Of scheduled flights
- Average delay when late
- 66 min
- Flights arriving 15+ minutes late
- Flights tracked
- 352
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 57%
- Air traffic control & airport 18%
- Airline (crew, maintenance, cleaning) 14%
- Extreme weather 9%
- Security 2%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 86.7% | 30 |
| October 2025 | 75.9% | 31 |
| November 2025 | 79.3% | 29 |
| December 2025 | 83.3% | 30 |
| January 2026 | 80.8% | 27 |
| February 2026 | 66.7% | 24 |
| March 2026 | 67.9% | 28 |
| April 2026 | 86.2% | 30 |
| May 2026 | 74.2% | 31 |
| June 2026 | 73.3% | 30 |
| July 2026 | 67.7% | 31 |
| August 2026 | 86.7% | 31 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data