SEA to AUS flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Austin Bergstrom International Airport · 1,770 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or AUS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Seattle (SEA) to Austin (AUS) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.9% were cancelled, and 5% arrived an hour or more late.
- Alaska Airlines was the most punctual airline here (80% on time); Delta Air Lines was the least (80%).
- Departures scheduled around 8am did best (95% on time); around 5pm did worst (75%).
- Tuesday was the most reliable day to fly (87% on time) and Friday the least (73%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (43%).
Which airline is most on time from SEA to AUS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Alaska Airlines | 80% | 0.7% | 10 min | 3.4% | 1,066 |
| Delta Air Lines | 80% | 1.2% | 14 min | 7.2% | 944 |
| Southwest Airlines | 47% | 0.0% | 31 min | 6.9% | 58 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12am83%30 flights
- 7am89%278 flights
- 8am95%125 flights
- 9am78%317 flights
- 10am81%99 flights
- 11am78%404 flights
- 12pm78%157 flights
- 1pm31%35 flights
- 5pm75%468 flights
- 6pm77%136 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday76%0.0% cancelled
- Tuesday87%0.0% cancelled
- Wednesday83%0.0% cancelled
- Thursday77%0.7% cancelled
- Friday73%1.0% cancelled
- Saturday83%3.1% cancelled
- Sunday77%1.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)43%
- Late-arriving aircraft30%
- Air traffic control & airport congestion24%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)67%
- Extreme weather33%
- Air traffic control & airport congestion0%
- Security0%
SEA to AUS: common questions
- How often are SEA to AUS flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Seattle to Austin cancelled?
- 0.9% of scheduled flights were cancelled (18 of 2,068).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 55 min behind schedule on average, and 5.2% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: AUS to SEA — 82% on time
More flights from Seattle
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SEA → AUS, nonstop flights by US airlines that report to the DOT. How we calculate this.