Flight AS306
Alaska Airlines flight AS306
Looking for AS306 in the air…
Seattle (SEA) to Boston (BOS)
Historically, this flight arrives 15+ minutes late 24% of the time, and when it is late the delay averages 65 minutes. It was cancelled 1.4% of the time.
- On-time arrivals
- 75.6%
- Less than 15 minutes late
- Cancelled
- 1.4%
- Of scheduled flights
- Average delay when late
- 65 min
- Flights arriving 15+ minutes late
- Flights tracked
- 365
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 60%
- Airline (crew, maintenance, cleaning) 19%
- Extreme weather 13%
- Late-arriving aircraft 8%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Boston (BOS) to Seattle (SEA)
Historically, this flight arrives 15+ minutes late 42% of the time, and when it is late the delay averages 52 minutes. It was cancelled 1.6% of the time.
- On-time arrivals
- 57.9%
- Less than 15 minutes late
- Cancelled
- 1.6%
- Of scheduled flights
- Average delay when late
- 52 min
- Flights arriving 15+ minutes late
- Flights tracked
- 129
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 48%
- Air traffic control & airport 37%
- Airline (crew, maintenance, cleaning) 14%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 66.7% | 30 |
| October 2025 | 60.0% | 35 |
| November 2025 | 74.5% | 53 |
| December 2025 | 75.0% | 46 |
| January 2026 | 100.0% | 31 |
| February 2026 | 85.2% | 28 |
| March 2026 | 75.0% | 41 |
| April 2026 | 59.3% | 54 |
| May 2026 | 66.1% | 62 |
| June 2026 | 74.4% | 39 |
| July 2026 | 64.5% | 31 |
| August 2026 | 65.9% | 44 |
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