Airport month record

AUSAPR

Austin-Bergstrom International in April 2026

Departures: 7,647
Month: April 2026
National, same month: 79.8%
Carriers: 11

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

AUS in April lands a B+, 2 points worse than the national rate of 79.8%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 7,647 flights, of which Delta Air Lines flew 1,139 at 83.9% on time.

Delta Air Lines is the most reliable of the five carriers covered here at 83.9% on time across 1,139 flights.

On time

77.5%

Arrivals under 15 minutes late, of 7,594 completed departures

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

0.59%

Nationally in April: 0.90%

Whole year

76.6%

AUS across all twelve months

These figures cover 7,647 departures from Austin-Bergstrom International in April 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

April next to AUS's other months

Against AUS's own year, April ran level with the twelve-month rate of 76.6%, which makes it number six of twelve months, best first. Cancellations were unusually low for AUS in April, at 0.59% against 1.21% across the year. Either side of it, March ran 73.3% on time and May 75.1%, so a trip moved by a few weeks would have landed in a worse stretch.

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 (this page)	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 April

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 25 points, against 11 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,522 flights90.9%
8am–11am1,196 flights87.2%
11am–2pm1,202 flights79.3%
2pm–5pm1,710 flights67.6%
5pm–8pm1,455 flights70.4%
8pm–5am562 flights65.5%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 90.9% of the time, against 65.5% for the overnight 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 1,710 flights scheduled in it.

Across the week, Tuesday is the strongest day at 85.5% on time and Thursday the weakest at 67.5%. 18 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at AUS in April

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 83.9% of the time; Southwest Airlines manages 73.3%. Sample sizes sit next to every figure, because a two-point gap across 3,325 flights means less than a ten-point one.

Carriers at AUS in April 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	3,325	73.3%	45 min	0.18%	C+
Delta Air Lines	1,139	83.9%	64 min	0.35%	B+
American Airlines	1,037	79.7%	105 min	1.45%	B
United Airlines	942	80.3%	75 min	0.64%	B+
SkyWest Airlines	663	79.9%	101 min	0.00%	B+
Alaska Airlinesthin sample	144	93.1%	38 min	0.00%	A+
Frontier Airlinesthin sample	134	78.8%	106 min	1.49%	B
Spirit Airlinesthin sample	93	57.3%	85 min	11.83%	D−
JetBlue Airwaysthin sample	81	75.3%	88 min	0.00%	B+
Envoy Airthin sample	46	75.6%	76 min	2.17%	B
Allegiant Airthin sample	34	76.5%	38 min	0.00%	B+

Delta leads Southwest by 11 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

Route by route

Busiest routes out of AUS in April

Routes from AUS in April 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
AUS to DEN · Denver	447	84.1%	55 min	0.22%	B+
AUS to DFW · Dallas-Fort Worth	404	77.0%	98 min	1.98%	B
AUS to LAX · Los Angeles	383	80.3%	65 min	0.26%	B+
AUS to ATL · Atlantathin sample	364	81.5%	51 min	0.27%	B+
AUS to PHX · Phoenixthin sample	317	81.6%	108 min	0.32%	B+
AUS to ORD · Chicagothin sample	294	69.8%	108 min	3.40%	C−
AUS to BNA · Nashvillethin sample	266	73.3%	64 min	0.00%	C+
AUS to LAS · Las Vegasthin sample	247	73.9%	50 min	0.81%	C+
AUS to SAN · San Diegothin sample	243	72.0%	52 min	0.00%	C+
AUS to MCO · Orlandothin sample	239	77.2%	44 min	0.84%	B+
AUS to IAH · Houstonthin sample	230	77.6%	65 min	0.87%	B+
AUS to SFO · San Franciscothin sample	220	60.0%	61 min	0.00%	D+
AUS to MIA · Miamithin sample	210	84.6%	57 min	0.95%	B+
AUS to DAL · Dallasthin sample	200	78.4%	51 min	0.50%	B+
AUS to EWR · Newarkthin sample	188	81.9%	67 min	3.19%	B−
AUS to JFK · New Yorkthin sample	181	81.0%	60 min	0.00%	B+
AUS to SEA · Seattlethin sample	170	91.8%	52 min	0.00%	A+
AUS to MSY · New Orleansthin sample	160	73.1%	54 min	0.00%	C+
AUS to SLC · Salt Lake Citythin sample	149	85.8%	81 min	0.67%	A+
AUS to CLT · Charlottethin sample	143	85.9%	59 min	0.70%	A+
AUS to MSP · Minneapolisthin sample	142	83.8%	84 min	0.00%	B+
AUS to BOS · Bostonthin sample	138	65.7%	67 min	0.00%	C+
AUS to TPA · Tampathin sample	137	80.3%	46 min	0.00%	B+
AUS to MDW · Chicagothin sample	124	80.5%	48 min	0.81%	B+
AUS to FLL · Fort Lauderdalethin sample	118	65.2%	85 min	2.54%	C

Delay causes

What held AUS up in April

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 110,000 reported delay minutes.

Carrier
39%
Late-arriving aircraft
37%
National Airspace System
21%
Extreme weather
4%
Security
0%

37% 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 110,000 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 109,877 reported delay minutes.

Cancellations are rare at 0.59%, below the national 0.90% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

6.2% of arrivals land an hour or more late, close to the national 6.4%. 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 about an hour, which a normal layover absorbs.

What to do with this

Flying from AUS in April

For a April trip through AUS: expect 77.5% on time and 0.59% cancelled, going by April 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 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