Route
AUS → SEA
Austin Bergstrom International Airport Seattle–Tacoma International Airport
How punctual is this route?
- On-time arrivals
- 81.3%
- Less than 15 minutes late
- Cancelled
- 0.9%
- Of scheduled flights
- Average delay when late
- 67 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,089
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 42%
- Airline (crew, maintenance, cleaning) 35%
- Air traffic control & airport 18%
- Extreme weather 5%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 86.2% | 167 |
| October 2025 | 84.0% | 173 |
| November 2025 | 85.8% | 172 |
| December 2025 | 70.2% | 169 |
| January 2026 | 83.9% | 116 |
| February 2026 | 89.5% | 124 |
| March 2026 | 78.0% | 172 |
| April 2026 | 91.8% | 170 |
| May 2026 | 86.3% | 185 |
| June 2026 | 78.4% | 207 |
| July 2026 | 76.0% | 217 |
| August 2026 | 72.8% | 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 | 81.8% | 0.8% | 56 min |
| Delta Air Lines | 949 | 83.8% | 0.9% | 89 min |
| Southwest Airlines | 89 | 48.9% | 1.1% | 42 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AS503
16% late · 335 flights
-
DL780
7% late · 325 flights
-
AS339
26% late · 292 flights
-
DL831
26% late · 231 flights
-
AS595
15% late · 208 flights
-
DL1684
11% late · 141 flights
-
DL1006
26% late · 93 flights
-
DL833
24% late · 75 flights
-
AS215
27% late · 70 flights
-
AS463
5% late · 38 flights
-
DL396
20% late · 36 flights
-
WN393
51% late · 36 flights
-
AS782
3% late · 35 flights
-
DL1950
9% late · 35 flights
-
AS352
22% late · 28 flights
-
AS502
7% late · 28 flights
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