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2,848 km · Domestic

Austin Bergstrom (AUS) – Seattle–Tacoma (SEA)

In July 2026, 434 flights operated between Austin Bergstrom and Seattle–Tacoma (both directions), and 68.7% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January226224▼ 0.9%
February211248▲ 17.5%
March334336▲ 0.6%
April349340▼ 2.6%
May391369▼ 5.6%
June407411▲ 1.0%
July411434▲ 5.6%
August388––
September333––
October339–in progress
November340––
December336––
Year to date (Jan–Jul)2,3292,362▲ 1.4%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January86.3%79.9%▼ 7.4%
February84.8%88.3%▲ 4.1%
March87.7%82.4%▼ 6.0%
April88.0%89.4%▲ 1.6%
May72.6%80.5%▲ 10.9%
June71.7%76.2%▲ 6.3%
July74.0%68.7%▼ 7.2%
August82.2%––
September84.7%––
October85.8%–in progress
November85.0%––
December71.1%––
Year-to-date average (Jan–Jul)80.7%80.8%▲ 0.1%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January08–
February10▼ 100.0%
March08–
April10▼ 100.0%
May31▼ 66.7%
June03–
July50▼ 100.0%
August2––
September1––
October8–in progress
November4––
December2––
Year to date (Jan–Jul)1020▲ 100.0%

Airlines on this route

  1. Alaska Airlines 54.9%
  2. Delta Air Lines 43.5%
  3. Southwest Airlines 1.6%

Oct 1, 2024 – Jul 31, 2026

By direction

AUS → SEA

Scheduled flights
3,703
Flights operated
3,674
Cancelled
29 · 0.8%
On-time departures
81.2%

SEA → AUS

Scheduled flights
3,704
Flights operated
3,681
Cancelled
23 · 0.6%
On-time departures
80.3%

AUS → SEA and SEA → AUS counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Alaska Airlines AS 4,070 54.9% 79.5% 22
Delta Air Lines DL 3,221 43.5% 83.7% 29
Southwest Airlines WN 116 1.6% 42.6% 1

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay08:00–09:003.3min · 425 recorded · 422 measured
Gap to highest-delay hour15.6min08:00 ↔ 18:00
Recorded flights7,407AUS–SEA

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · Fewer than 200 measured departures · 64 recorded · 64 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 91.6% · 644 recorded · 640 measured · Source: the US BTS 07:00 · 87.3% · 908 recorded · 900 measured · Source: the US BTS 08:00 · 86.0% · 425 recorded · 422 measured · Source: the US BTS 09:00 · 83.5% · 587 recorded · 580 measured · Source: the US BTS 10:00 · 81.9% · 301 recorded · 299 measured · Source: the US BTS 11:00 · 81.5% · 838 recorded · 832 measured · Source: the US BTS 12:00 · 79.6% · 513 recorded · 510 measured · Source: the US BTS 13:00 · 81.5% · 508 recorded · 507 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 123 recorded · 121 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 136 recorded · 134 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 180 recorded · 177 measured · Source: the US BTS 17:00 · 76.6% · 885 recorded · 881 measured · Source: the US BTS 18:00 · 69.8% · 697 recorded · 695 measured · Source: the US BTS 19:00 · 71.1% · 440 recorded · 436 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 44 recorded · 44 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 114 recorded · 113 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · Fewer than 200 measured departures · 64 recorded · 64 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 7.0 min · 644 recorded · 640 measured · Source: the US BTS 07:00 · 5.8 min · 908 recorded · 900 measured · Source: the US BTS 08:00 · 3.3 min · 425 recorded · 422 measured · Source: the US BTS 09:00 · 6.1 min · 587 recorded · 580 measured · Source: the US BTS 10:00 · 15.0 min · 301 recorded · 299 measured · Source: the US BTS 11:00 · 10.8 min · 838 recorded · 832 measured · Source: the US BTS 12:00 · 11.0 min · 513 recorded · 510 measured · Source: the US BTS 13:00 · 9.2 min · 508 recorded · 507 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 123 recorded · 121 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 136 recorded · 134 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 180 recorded · 177 measured · Source: the US BTS 17:00 · 13.1 min · 885 recorded · 881 measured · Source: the US BTS 18:00 · 18.9 min · 697 recorded · 695 measured · Source: the US BTS 19:00 · 15.7 min · 440 recorded · 436 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 44 recorded · 44 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 114 recorded · 113 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · 64 · 64 recorded · 64 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 644 · 644 recorded · 640 measured · Source: the US BTS 07:00 · 908 · 908 recorded · 900 measured · Source: the US BTS 08:00 · 425 · 425 recorded · 422 measured · Source: the US BTS 09:00 · 587 · 587 recorded · 580 measured · Source: the US BTS 10:00 · 301 · 301 recorded · 299 measured · Source: the US BTS 11:00 · 838 · 838 recorded · 832 measured · Source: the US BTS 12:00 · 513 · 513 recorded · 510 measured · Source: the US BTS 13:00 · 508 · 508 recorded · 507 measured · Source: the US BTS 14:00 · 123 · 123 recorded · 121 measured · Source: the US BTS 15:00 · 136 · 136 recorded · 134 measured · Source: the US BTS 16:00 · 180 · 180 recorded · 177 measured · Source: the US BTS 17:00 · 885 · 885 recorded · 881 measured · Source: the US BTS 18:00 · 697 · 697 recorded · 695 measured · Source: the US BTS 19:00 · 440 · 440 recorded · 436 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · 44 · 44 recorded · 44 measured · Source: the US BTS 23:00 · 114 · 114 recorded · 113 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00Fewer than 200 measured departures—6464
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:0091.6%7.0 min640644
07:0087.3%5.8 min900908
08:0086.0%3.3 min422425
09:0083.5%6.1 min580587
10:0081.9%15.0 min299301
11:0081.5%10.8 min832838
12:0079.6%11.0 min510513
13:0081.5%9.2 min507508
14:00Fewer than 200 measured departures—121123
15:00Fewer than 200 measured departures—134136
16:00Fewer than 200 measured departures—177180
17:0076.6%13.1 min881885
18:0069.8%18.9 min695697
19:0071.1%15.7 min436440
20:00No observations———
21:00No observations———
22:00Fewer than 200 measured departures—4444
23:00Fewer than 200 measured departures—113114

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 79.0% · 1,100 recorded · 1,093 measured · Source: the US BTS Tuesday · 84.2% · 1,053 recorded · 1,051 measured · Source: the US BTS Wednesday · 82.8% · 1,066 recorded · 1,065 measured · Source: the US BTS Thursday · 79.6% · 1,082 recorded · 1,077 measured · Source: the US BTS Friday · 80.7% · 1,074 recorded · 1,062 measured · Source: the US BTS Saturday · 81.1% · 938 recorded · 926 measured · Source: the US BTS Sunday · 78.2% · 1,094 recorded · 1,081 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 12.6 min · 1,100 recorded · 1,093 measured · Source: the US BTS Tuesday · 8.3 min · 1,053 recorded · 1,051 measured · Source: the US BTS Wednesday · 8.0 min · 1,066 recorded · 1,065 measured · Source: the US BTS Thursday · 9.9 min · 1,082 recorded · 1,077 measured · Source: the US BTS Friday · 11.8 min · 1,074 recorded · 1,062 measured · Source: the US BTS Saturday · 9.3 min · 938 recorded · 926 measured · Source: the US BTS Sunday · 12.9 min · 1,094 recorded · 1,081 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 1,100 · 1,100 recorded · 1,093 measured · Source: the US BTS Tuesday · 1,053 · 1,053 recorded · 1,051 measured · Source: the US BTS Wednesday · 1,066 · 1,066 recorded · 1,065 measured · Source: the US BTS Thursday · 1,082 · 1,082 recorded · 1,077 measured · Source: the US BTS Friday · 1,074 · 1,074 recorded · 1,062 measured · Source: the US BTS Saturday · 938 · 938 recorded · 926 measured · Source: the US BTS Sunday · 1,094 · 1,094 recorded · 1,081 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday79.0%12.6 min1,0931,100
Tuesday84.2%8.3 min1,0511,053
Wednesday82.8%8.0 min1,0651,066
Thursday79.6%9.9 min1,0771,082
Friday80.7%11.8 min1,0621,074
Saturday81.1%9.3 min926938
Sunday78.2%12.9 min1,0811,094

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 83.1% · 458 recorded · 450 measured · Source: the US BTS Feb · 86.7% · 460 recorded · 459 measured · Source: the US BTS Mar · 85.1% · 678 recorded · 670 measured · Source: the US BTS Apr · 88.7% · 690 recorded · 689 measured · Source: the US BTS May · 76.5% · 764 recorded · 760 measured · Source: the US BTS Jun · 74.0% · 821 recorded · 818 measured · Source: the US BTS Jul · 71.2% · 850 recorded · 845 measured · Source: the US BTS Aug · 82.2% · 390 recorded · 388 measured · Source: the US BTS Sep · 84.7% · 334 recorded · 333 measured · Source: the US BTS Oct · 85.7% · 597 recorded · 589 measured · Source: the US BTS Nov · 85.3% · 714 recorded · 705 measured · Source: the US BTS Dec · 75.8% · 651 recorded · 649 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 7.7 min · 458 recorded · 450 measured · Source: the US BTS Feb · 5.2 min · 460 recorded · 459 measured · Source: the US BTS Mar · 7.4 min · 678 recorded · 670 measured · Source: the US BTS Apr · 4.3 min · 690 recorded · 689 measured · Source: the US BTS May · 14.8 min · 764 recorded · 760 measured · Source: the US BTS Jun · 15.5 min · 821 recorded · 818 measured · Source: the US BTS Jul · 16.8 min · 850 recorded · 845 measured · Source: the US BTS Aug · 10.0 min · 390 recorded · 388 measured · Source: the US BTS Sep · 6.8 min · 334 recorded · 333 measured · Source: the US BTS Oct · 5.4 min · 597 recorded · 589 measured · Source: the US BTS Nov · 10.2 min · 714 recorded · 705 measured · Source: the US BTS Dec · 13.1 min · 651 recorded · 649 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 458 · 458 recorded · 450 measured · Source: the US BTS Feb · 460 · 460 recorded · 459 measured · Source: the US BTS Mar · 678 · 678 recorded · 670 measured · Source: the US BTS Apr · 690 · 690 recorded · 689 measured · Source: the US BTS May · 764 · 764 recorded · 760 measured · Source: the US BTS Jun · 821 · 821 recorded · 818 measured · Source: the US BTS Jul · 850 · 850 recorded · 845 measured · Source: the US BTS Aug · 390 · 390 recorded · 388 measured · Source: the US BTS Sep · 334 · 334 recorded · 333 measured · Source: the US BTS Oct · 597 · 597 recorded · 589 measured · Source: the US BTS Nov · 714 · 714 recorded · 705 measured · Source: the US BTS Dec · 651 · 651 recorded · 649 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan83.1%7.7 min450458
Feb86.7%5.2 min459460
Mar85.1%7.4 min670678
Apr88.7%4.3 min689690
May76.5%14.8 min760764
Jun74.0%15.5 min818821
Jul71.2%16.8 min845850
Aug82.2%10.0 min388390
Sep84.7%6.8 min333334
Oct85.7%5.4 min589597
Nov85.3%10.2 min705714
Dec75.8%13.1 min649651

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 80.2% 5,940
  • Delayed >15 min 19.1% 1,415
  • Cancelled 0.7% 52
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

36
36 of 36
Flight numbersBy direction DeparturesOn time
AS502 SEA → AUS 606 81.3%
DL739 SEA → AUS 554 89.8%
DL831 SEA → AUS 550 83.4%
DL780 AUS → SEA 537 92.9%
DL848 SEA → AUS 502 78.2%
AS503 AUS → SEA 437 85.0%
AS595 AUS → SEA 432 83.1%
AS352 SEA → AUS 383 75.1%
AS339 AUS → SEA 370 73.3%
AS372 SEA → AUS 359 75.1%
DL831 AUS → SEA 276 68.3%
AS318 SEA → AUS 207 87.4%
AS313 AUS → SEA 167 63.5%
AS505 AUS → SEA 159 89.3%
DL1006 AUS → SEA 148 73.7%
AS594 SEA → AUS 136 75.0%
DL739 AUS → SEA 129 83.5%
DL1950 AUS → SEA 120 90.8%
DL1684 AUS → SEA 110 92.7%
AS723 AUS → SEA 106 96.2%
DL833 AUS → SEA 75 78.4%
AS461 SEA → AUS 73 90.4%
AS1227 SEA → AUS 69 65.2%
AS1228 AUS → SEA 69 94.2%
DL382 AUS → SEA 55 75.9%
AS215 AUS → SEA 52 67.3%
AS422 SEA → AUS 52 73.1%
AS604 SEA → AUS 51 64.7%
WN4956 SEA → AUS 50 40.0%
AS463 AUS → SEA 38 84.2%
DL396 AUS → SEA 36 88.6%
AS722 SEA → AUS 35 88.6%
AS782 AUS → SEA 35 94.3%
DL362 AUS → SEA 35 94.3%
WN393 AUS → SEA 34 39.4%
DL317 AUS → SEA 30 80.0%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 434 +5.6% 0 68.7%
June 2026 411 +1.0% 3 76.2%
May 2026 369 −5.6% 1 80.5%
April 2026 340 −2.6% 0 89.4%
March 2026 336 +0.6% 8 82.4%
February 2026 248 +17.5% 0 88.3%
January 2026 224 −0.9% 8 79.9%
December 2025 336 +7.3% 2 71.1%
November 2025 340 −6.8% 4 85.0%
October 2025 339 +35.6% 8 85.8%
September 2025 333 1 84.7%
August 2025 388 2 82.2%
July 2025 411 5 74.0%
June 2025 407 0 71.7%
May 2025 391 3 72.6%
April 2025 349 1 88.0%
March 2025 334 0 87.7%
February 2025 211 1 84.8%
January 2025 226 0 86.3%
December 2024 313 0 80.8%
November 2024 365 5 85.5%
October 2024 250 0 85.6%

How to read this chart

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