ATL to AUS delays: 80% on time (Atlanta to Austin)

80% of flights from Atlanta to Austin arrived on time over the past 12 months. That is about the typical U.S. route. The 6 a.m. departures ran on time 96% of the time; the 8 p.m. ones 62%. Most reliable airline: Southwest Airlines (82%). 7% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for ATL → AUS: when a flight was late, it was under 45 minutes late 56% of the time. About 1 in 17 flights landed an hour or more late, and 1 in 132 three hours or more; 1.3% were cancelled outright.

On time or early80%
15–30 min late6.7%
30–60 min late6.3%
1–2 hours late3.9%
2–3 hours late1.1%
3+ hours late0.8%
Diverted0.1%
Cancelled1.3%

Share of all 4,497 scheduled flights, past 12 months, by arrival time against schedule.

By airline

Airline	Flights	On time	Cancelled	Typical arrival	1h+ late	Avg when late	Operated by
Delta Air Lines	3,163	81%	1.5%	−9 min	5.6%	+58 min	Delta Air Lines
Southwest Airlines	1,038	82%	0.6%	−8 min	4.6%	+52 min	Southwest Airlines
Frontier Airlines	295	66%	1.4%	−1 min	11.2%	+77 min	Frontier Airlines
American Airlines	1	—	—	—	—	—	American Airlines

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at ATL). Delays build through the day as late planes knock on, so early flights usually do best.

ATL → AUS, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.

82%+ on time76–82%68–76%under 68%too few flights

By airline and hour

Departs	Delta Air Lines	Southwest Airlines	Frontier Airlines
6 a.m.	—	97%	—
8 a.m.	91%	—	—
9 a.m.	87%	—	—
11 a.m.	86%	89%	—
noon	85%	—	—
2 p.m.	79%	88%	—
3 p.m.	76%	—	60%
5 p.m.	78%	70%	—
6 p.m.	73%	—	—
7 p.m.	77%	—	—
8 p.m.	62%	—	—
10 p.m.	77%	—	—

Last flight of the day

On ATL → AUS, each airline's last flight of the day was cancelled 0.8% of the time, against 1.4% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 0.7% of the time (earlier flights: 0.6%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.

Airline	Last departure	Last: cancelled	Last: 3h+ late	Earlier: cancelled	Next morning
Delta Air Lines	10:59 p.m.	1.6%	0.3%	1.5%	first flight 8:10 a.m.
Southwest Airlines	5:30 p.m.	0.0%	0.9%	0.9%	first flight 6:05 a.m.

Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.

By month

Each calendar month pooled over 2023–2026. Best: February (88%). Worst: July (60%).

By day of week

Day	Flights	On time	Cancelled
Monday	693	75%	1.9%
Tuesday	626	85%	0.5%
Wednesday	624	89%	0.2%
Thursday	668	82%	0.6%
Friday	676	79%	0.3%
Saturday	533	80%	2.8%
Sunday	677	70%	2.8%

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Airline (crew, maintenance, ops) 38%Late inbound plane 38%Air traffic & airport (NAS) 21%Severe weather 3%

Cancellations: airline 36 · weather 20 · air traffic/airport 1

Month by month

Share of flights on time, by month (hover a point for cancellations)

ATL → AUS, monthly on-time and cancellation rate.

Flight numbers on this route

Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.

Flight	Departs	Flights	On time	Cancelled	Typical arrival	Operated by
DL 2976	8:05 a.m.	360	91%	2.2%	−11 min	Delta Air Lines
DL 2886	9:40 a.m.	363	87%	1.4%	−11 min	Delta Air Lines
DL 2011	11:05 a.m.	281	88%	1.1%	−10 min	Delta Air Lines
DL 2104	12:30 p.m.	328	84%	2.1%	−7 min	Delta Air Lines
DL 1397	2:15 p.m.	360	79%	1.4%	−10 min	Delta Air Lines
F9 4211	3:10 p.m.	279	65%	1.4%	0 min	Frontier Airlines
DL 1491	3:50 p.m.	347	74%	0.9%	−6 min	Delta Air Lines
DL 1170	6:59 p.m.	319	72%	1.3%	−5 min	Delta Air Lines
DL 1081	8:45 p.m.	126	59%	0.8%	+6 min	Delta Air Lines
DL 1335	10:59 p.m.	246	78%	2.4%	−9 min	Delta Air Lines

Worst days in the past year

Date	Flights	On time	Cancelled
Jan 26, 2026	13	8%	4
Jan 25, 2026	13	15%	7
Mar 16, 2026	13	23%	5
Dec 7, 2025	13	23%	1
Apr 28, 2026	12	25%	0

Questions

How often are flights from ATL to AUS on time?

80% of 4,497 scheduled flights from Atlanta, GA to Austin, TX arrived within 15 minutes of schedule between September 2025 and August 2026. 1.3% were cancelled.

What is the best time of day to fly ATL to AUS?

Flights scheduled to leave at 6 a.m. were the most reliable (96% on time). The 8 p.m. departures were the least (62%).

Which airline is most on time from ATL to AUS?

Southwest Airlines: 82% of its 1,038 flights on the route arrived on time. Delta Air Lines: 81%. Frontier Airlines: 66%.

What month has the most delays from ATL to AUS?

July (60% on time). The best month is February (88%), over 2023–2026.

Is the last flight of the day from ATL to AUS more likely to be cancelled?

No, the opposite. Each airline's last ATL–AUS flight of the day was cancelled 0.8% of the time over the past year, against 1.4% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.

ATL → AUS on time