Airport month record

AUSAUG

Austin-Bergstrom International in August 2025

Departures: 7,214
Month: August 2025
National, same month: 77.4%
Carriers: 11

Historical statistics for August 2025, not live status or a forecast for this year’s August. For today’s conditions at AUS, see live FAA status.

AUS in August lands a B+, level with the national rate of 77.4%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 7,214 flights, of which Delta Air Lines flew 1,112 at 81.9% on time.

Delta Air Lines is the most reliable of the five carriers covered here at 81.9% on time across 1,112 flights.

On time

78.1%

Arrivals under 15 minutes late, of 7,125 completed departures

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

0.94%

Nationally in August: 1.08%

Whole year

76.6%

AUS across all twelve months

These figures cover 7,214 departures from Austin-Bergstrom International in August 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

August next to AUS's other months

Against AUS's own year, August ran 2 points better than the twelve-month rate of 76.6%, which makes it number four of twelve months, best first. Either side of it, July ran 69.6% on time and September 84.2%, so this month sits in line with its neighbours.

AUS month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	7,896	69.6%	80 min	1.61%	C
August 2025 (this page)	7,214	78.1%	74 min	0.94%	B+
September 2025	6,889	84.2%	65 min	0.39%	B+
October 2025	7,845	76.8%	61 min	0.40%	B+
November 2025	7,346	76.0%	75 min	1.05%	B
December 2025	7,528	77.9%	70 min	0.62%	B+
January 2026	6,707	82.8%	84 min	4.65%	B−
February 2026	6,471	81.9%	68 min	0.99%	B+
March 2026	7,973	73.3%	73 min	1.71%	C
April 2026	7,647	77.5%	64 min	0.59%	B+
May 2026	7,831	75.1%	71 min	0.91%	B+
June 2026	7,879	69.1%	69 min	0.98%	C+

Departure window

The best time of day to leave AUS in August

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 25 points, against 8 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,425 flights91.6%
8am–11am1,263 flights85.6%
11am–2pm1,170 flights84.1%
2pm–5pm1,471 flights68.0%
5pm–8pm1,301 flights66.3%
8pm–5am584 flights69.5%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 91.6% of the time, against 66.3% for the evening window. That is 25 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 1,471 flights scheduled in it.

Across the week, Tuesday is the strongest day at 86.9% on time and Sunday the weakest at 74.0%. 13 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at AUS in August

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 81.9% of the time; American Airlines manages 73.6%. Sample sizes sit next to every figure, because a two-point gap across 903 flights means less than a ten-point one.

Carriers at AUS in August 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	2,958	78.9%	54 min	0.27%	B+
Delta Air Lines	1,112	81.9%	88 min	0.54%	B+
American Airlines	903	73.6%	106 min	3.65%	C−
United Airlines	879	79.4%	67 min	1.59%	B
SkyWest Airlines	648	79.1%	88 min	0.15%	B+
Alaska Airlinesthin sample	225	78.2%	51 min	0.00%	B+
Frontier Airlinesthin sample	172	64.1%	95 min	2.91%	D
Envoy Airthin sample	120	68.9%	104 min	0.83%	C+
Spirit Airlinesthin sample	83	69.9%	48 min	0.00%	C+
Allegiant Airthin sample	73	79.5%	104 min	0.00%	B+
JetBlue Airwaysthin sample	31	80.6%	61 min	0.00%	B+

American Airlines cancels 3.6% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

Route by route

Busiest routes out of AUS in August

Routes from AUS in August 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
AUS to ATL · Atlanta	407	82.2%	56 min	1.72%	B
AUS to DEN · Denver	399	76.7%	59 min	1.25%	B
AUS to DFW · Dallas-Fort Worththin sample	351	67.5%	129 min	4.27%	C−
AUS to LAX · Los Angelesthin sample	315	84.5%	95 min	0.63%	B+
AUS to ORD · Chicagothin sample	266	74.8%	64 min	3.01%	C−
AUS to SFO · San Franciscothin sample	251	85.5%	48 min	0.80%	A+
AUS to PHX · Phoenixthin sample	247	83.7%	110 min	0.81%	B+
AUS to BNA · Nashvillethin sample	234	80.3%	89 min	0.00%	B+
AUS to LAS · Las Vegasthin sample	224	73.4%	82 min	0.89%	C+
AUS to IAH · Houstonthin sample	213	72.7%	65 min	1.88%	C
AUS to SEA · Seattlethin sample	195	82.0%	65 min	0.51%	B+
AUS to DAL · Dallasthin sample	189	82.0%	72 min	0.00%	B+
AUS to SAN · San Diegothin sample	182	76.7%	48 min	0.55%	B+
AUS to MSY · New Orleansthin sample	181	84.5%	72 min	0.00%	B+
AUS to JFK · New Yorkthin sample	176	80.5%	122 min	1.14%	B
AUS to MCO · Orlandothin sample	173	73.5%	68 min	0.58%	C+
AUS to EWR · Newarkthin sample	159	70.3%	71 min	0.63%	C+
AUS to MIA · Miamithin sample	157	65.2%	87 min	1.27%	C
AUS to SLC · Salt Lake Citythin sample	142	85.9%	66 min	0.00%	A+
AUS to BOS · Bostonthin sample	141	72.3%	87 min	0.00%	C+
AUS to MSP · Minneapolisthin sample	140	73.6%	88 min	0.00%	C+
AUS to HOU · Houstonthin sample	139	77.7%	45 min	0.00%	B+
AUS to CLT · Charlottethin sample	134	76.3%	101 min	2.24%	B
AUS to DTW · Detroitthin sample	131	91.5%	40 min	0.76%	A+
AUS to PHL · Philadelphiathin sample	117	75.2%	77 min	2.56%	B

Delay causes

What held AUS up in August

One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 116,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
45%
Carrier
30%
National Airspace System
20%
Extreme weather
5%
Security
0%

45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 116,000 reported delay minutes here, that single category outweighs weather by 10 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 115,604 reported delay minutes.

Cancellations sit at 0.94% against a national 1.08%, which is ordinary. Diversions add another 0.29%.

7.9% of arrivals land an hour or more late, close to the national 8.2%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

What to do with this

Flying from AUS in August

For a August trip through AUS: expect 78.1% on time and 0.94% cancelled, going by August 2025. The 5am–8am window was the strongest part of the day.

Austin-Bergstrom International (AUS), the whole year
AUS in July69.6%
AUS in September84.2%
AUS in October76.8%
AUS in November76.0%
AUS in December77.9%
AUS in January82.8%
AUS in February81.9%
AUS in March73.3%
AUS in April77.5%
AUS in May75.1%
AUS in June69.1%

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures