Route
SEA → AUS
Seattle–Tacoma International Airport Austin Bergstrom International Airport
How punctual is this route?
- On-time arrivals
- 78.5%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 61 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,090
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 43%
- Late-arriving aircraft 30%
- Air traffic control & airport 24%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 84.9% | 167 |
| October 2025 | 85.3% | 174 |
| November 2025 | 79.3% | 172 |
| December 2025 | 76.2% | 169 |
| January 2026 | 82.1% | 116 |
| February 2026 | 87.1% | 124 |
| March 2026 | 86.9% | 172 |
| April 2026 | 88.2% | 170 |
| May 2026 | 78.4% | 185 |
| June 2026 | 73.8% | 207 |
| July 2026 | 62.7% | 217 |
| August 2026 | 68.7% | 217 |
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
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 1,051 | 80.1% | 0.7% | 52 min |
| Delta Air Lines | 950 | 80.1% | 1.1% | 72 min |
| Southwest Airlines | 89 | 42.7% | 0.0% | 60 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
DL831
21% late · 353 flights
-
DL848
27% late · 311 flights
-
AS502
17% late · 295 flights
-
AS352
16% late · 282 flights
-
DL739
11% late · 281 flights
-
AS372
22% late · 256 flights
-
AS461
16% late · 73 flights
-
AS422
39% late · 70 flights
-
AS604
25% late · 69 flights
-
WN4956
63% late · 52 flights
-
WN4506
62% late · 24 flights
Reviews
No reviews yet. Be the first to review this route.