PlainFlights

Route · SEA → AUS · 2020–2025 BTS data

Seattle to Austin

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to AUS (Seattle to Austin) ranks #1132 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

78.5%
On-time
-0.5 pts
vs US avg
60 min
Delay when late
10,177
Flights
#1132 of 4927
Corpus placement

Cancelled

0.7%

Best Month

Feb 2024 90%

Worst Month

Jul 2025 61%

Distance

1,770 mi

Carriers

6

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 169 40 1 0 DL,AS
Nov 2025 172 35 2 1 AS,DL
Oct 2025 174 25 4 0 AS,DL
Sep 2025 167 25 1 0 DL,AS
Aug 2025 195 47 1 1 AS,DL
Jul 2025 208 82 2 0 AS,DL
Jun 2025 203 71 0 1 AS,DL
May 2025 198 70 1 0 AS,DL
Apr 2025 175 24 0 0 DL,AS
Mar 2025 167 22 0 2 AS,DL
Feb 2025 106 18 0 0 AS,DL
Jan 2025 113 18 0 0 AS,DL
Dec 2024 156 40 0 0 AS,DL
Nov 2024 185 32 2 0 AS,DL
Oct 2024 196 37 0 0 AS,DL
Sep 2024 204 34 0 0 AS,DL
Aug 2024 194 59 0 0 AS,DL
Jul 2024 178 60 3 3 AS,DL
Jun 2024 174 56 2 0 AS,DL
May 2024 181 58 0 1 AS,DL
Apr 2024 169 36 0 0 AS,DL
Mar 2024 146 36 0 0 AS,DL
Feb 2024 116 12 0 0 AS,DL
Jan 2024 124 25 10 1 AS,DL

SEA–AUS seasonal on-time pattern

Best: April (84.7%) · weakest: June (72.2%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 76.8%

Strongest calendar month

April

84.7% on-time · ~133 flights/mo

Busiest calendar month

August

~171 flights/mo avg

Weakest calendar month

June

72.2% on-time · ~148 flights/mo

Cancellation Rate

0.7%

29 of 4,070 flights

Diversion Rate

0.2%

10 of 4,070 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

AUS - Austin

Full on-time, delay-cause, and seasonal performance for Austin, TX.

AUS on-time profile

Compare the two airports

See SEA and AUS side by side on delays, cancellations, and reliability.

Compare SEA vs AUS

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Austin · fleet on-time rank #3700 of 4927.

What the Data Says About SEA to AUS

10,177 tracked flights put the SEA to AUS pairing (Seattle to Austin) at a 78.5% on-time rate, squarely in line with the wider network. Delays that do occur run 60.2 minutes on average. Across the 1,770-mile route and its 6 carriers, the trailing 24 months show 0.7% cancelled and 0.2% diverted (4,070 flights sampled).

The monthly split is wide on this route: Feb 2024 posted the strongest performance at 90% on-time, while Jul 2025 came in at just 61% - a 29-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–AUS peaks in April at 84.7% on-time while August carries the heaviest traffic (~171 flights per month) ; the softest month is June at 72.2%, a 12.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to AUS rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to AUS ranks #1132 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SEA to AUS? ▼
Flights from Seattle to Austin have a 78.5% on-time rate based on 10,177 flights. The average delay is 60.2 minutes. The best recent month was Feb 2024 with 90% on-time.
What is the cancellation rate for SEA to AUS? ▼
Over the last 24 months, 0.7% of flights on this route were cancelled (29 of 4,070 flights) and 0.2% were diverted.
How far is the flight from SEA to AUS? ▼
The flight distance from Seattle (SEA) to Austin (AUS) is approximately 1,770 miles. This route is served by 6 carriers.
When is the best time to fly from SEA to AUS? ▼
The best recent month for on-time performance was Feb 2024 (90% on-time). The worst was Jul 2025 (61% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
AUS Airport

Austin
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SEA–AUS data

SEA–AUS is mid-pack at 78.5% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and AUS airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, April (84.7% on-time) beats June (72.2%) on this corridor. Seasonal chart
  • 4 other routes post a similar 78.5% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.