Airport month record

AUSMAY

Austin-Bergstrom International in May 2026

Departures: 7,831
Month: May 2026
National, same month: 78.6%
Carriers: 10

Historical statistics for May 2026, not live status or a forecast for this year’s May. For today’s conditions at AUS, see live FAA status.

AUS in May sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 78.6%. The late ones land a little over an hour behind schedule. That rests on 7,831 flights, of which Delta Air Lines flew 1,209 at 82.7% on time.

Delta Air Lines is the most reliable of the five carriers covered here at 82.7% on time across 1,209 flights.

On time

75.1%

Arrivals under 15 minutes late, of 7,735 completed departures

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

0.91%

Nationally in May: 0.92%

Whole year

76.6%

AUS across all twelve months

These figures cover 7,831 departures from Austin-Bergstrom International in May 2026. 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

May next to AUS's other months

Against AUS's own year, May ran 2 points worse than the twelve-month rate of 76.6%, which makes it number nine of twelve months, best first. Either side of it, April ran 77.5% on time and June 69.1%, 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	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 (this page)	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 May

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 32 points, against 15 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,566 flights91.6%
8am–11am1,203 flights88.1%
11am–2pm1,350 flights77.2%
2pm–5pm1,675 flights66.6%
5pm–8pm1,459 flights60.0%
8pm–5am578 flights60.3%

Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 60.0% on time, against 91.6% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 2pm–5pm window is the busiest, with 1,675 flights scheduled in it.

Across the week, Saturday is the strongest day at 82.6% on time and Thursday the weakest at 71.8%. 11 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at AUS in May

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 82.7% of the time; Southwest Airlines manages 67.8%. Sample sizes sit next to every figure, because a two-point gap across 3,382 flights means less than a ten-point one.

Carriers at AUS in May 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	3,382	67.8%	56 min	0.38%	C+
Delta Air Lines	1,209	82.7%	75 min	1.74%	B
American Airlines	1,077	82.1%	119 min	2.04%	B
United Airlines	961	76.1%	77 min	0.52%	B+
SkyWest Airlines	710	82.5%	79 min	0.56%	B+
Alaska Airlinesthin sample	155	92.1%	68 min	1.29%	A
Frontier Airlinesthin sample	123	77.0%	127 min	0.81%	B+
JetBlue Airwaysthin sample	87	71.3%	93 min	0.00%	C+
Envoy Airthin sample	67	71.9%	91 min	4.48%	C−
Allegiant Airthin sample	55	67.3%	102 min	0.00%	C+

The spread between Delta and Southwest is 15 points, wide enough that it should decide the booking. On a hundred trips that is 15 more arrivals inside the on-time window.

Route by route

Busiest routes out of AUS in May

Routes from AUS in May 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
AUS to DEN · Denver	466	77.6%	68 min	0.21%	B+
AUS to DFW · Dallas-Fort Worth	427	81.4%	132 min	5.39%	B−
AUS to ATL · Atlanta	386	74.9%	51 min	1.04%	C
AUS to LAX · Los Angeles	381	77.5%	65 min	1.05%	B
AUS to ORD · Chicagothin sample	298	79.1%	74 min	0.00%	B+
AUS to PHX · Phoenixthin sample	297	75.7%	76 min	0.34%	B+
AUS to BNA · Nashvillethin sample	275	68.2%	71 min	0.36%	C+
AUS to SFO · San Franciscothin sample	253	53.2%	70 min	0.40%	F+
AUS to LAS · Las Vegasthin sample	249	71.1%	83 min	0.40%	C+
AUS to MCO · Orlandothin sample	237	72.4%	54 min	1.69%	C
AUS to SAN · San Diegothin sample	236	68.8%	59 min	0.85%	C+
AUS to IAH · Houstonthin sample	228	66.5%	68 min	1.75%	C
AUS to MIA · Miamithin sample	214	81.3%	65 min	0.00%	B+
AUS to JFK · New Yorkthin sample	208	87.7%	65 min	1.44%	A
AUS to DAL · Dallasthin sample	205	74.6%	72 min	0.98%	C+
AUS to SEA · Seattlethin sample	185	86.3%	106 min	0.54%	A+
AUS to MSY · New Orleansthin sample	162	73.0%	60 min	0.62%	C+
AUS to SLC · Salt Lake Citythin sample	150	82.3%	70 min	1.33%	B
AUS to EWR · Newarkthin sample	145	87.5%	179 min	0.00%	A+
AUS to BOS · Bostonthin sample	145	74.5%	75 min	0.00%	C+
AUS to MSP · Minneapolisthin sample	144	80.6%	114 min	0.00%	B+
AUS to CLT · Charlottethin sample	138	81.0%	82 min	0.72%	B+
AUS to TPA · Tampathin sample	136	73.5%	64 min	0.00%	C+
AUS to MDW · Chicagothin sample	131	76.3%	51 min	0.00%	B+
AUS to IND · Indianapolisthin sample	130	72.3%	46 min	0.00%	C+

Delay causes

What held AUS up in May

One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 136,000 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
44%
Carrier
30%
National Airspace System
17%
Extreme weather
9%
Security
0%

44% 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 136,000 reported delay minutes here, that single category outweighs weather by 5 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 135,918 reported delay minutes.

Cancellations sit at 0.91% against a national 0.92%, which is ordinary. Diversions add another 0.32%.

8.2% of arrivals land an hour or more late, close to the national 7.1%. 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 May

For a May trip through AUS: expect 75.1% on time and 0.91% cancelled, going by May 2026. The 5am–8am window was the strongest part of the day.

Austin-Bergstrom International (AUS), the whole year
AUS in July69.6%
AUS in August78.1%
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 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