Route on-time record

AUS to LAS: most on-time flights and the best time to fly

Austin (Austin Bergstrom International Airport) to Las Vegas (Harry Reid International Airport). 2,870 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 0.5% were cancelled. The most reliable flight number was Southwest 212 at 5:55 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

AUS → LAS

Austin to Las Vegas: 2,870 nonstop flights a year

On time (12 months)

75%

Cancelled

0.5%

avg delay 16 min

Best time to leave

Before 9 AM

97% on time vs 60% 6 to 9 PM

Most reliable airline

Southwest

76% chance on time

Check AUS to LAS fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

#1 · Southwest 212
5:55 AM → 6:50 AM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
95%
chance on time
On time (history)
98%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 98% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 60%).
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
Limited track record · 55 flights
Find Southwest 212 fares Opens this date on Aviasales
#2 · Southwest 3868
5:30 AM → 6:30 AM3h 00m nonstop
Local times, typical schedule. Last flown 2026-04-06.
93%
chance on time
On time (history)
97%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 97% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 60%).
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
Limited track record · 33 flights
Find Southwest 3868 fares Opens this date on Aviasales
#3 · Southwest 366
8:45 AM → 9:40 AM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3799; its record covers all of them.
91%
chance on time
On time (history)
93%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 93% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 60%).
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
Limited track record · 54 flights
Find Southwest 366 fares Opens this date on Aviasales
#4 · Southwest 251
10:00 AM → 11:05 AM3h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
89%
chance on time
On time (history)
96%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 96% of the time (28 flights, Jun 2025 to May 2026).
- Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find Southwest 251 fares Opens this date on Aviasales
#5 · Southwest 474
8:25 AM → 9:30 AM3h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
87%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 88% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 60%).
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
Limited track record · 33 flights
Find Southwest 474 fares Opens this date on Aviasales
#6 · Southwest 4437
10:45 AM → 11:40 AM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-30.
85%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 4437 fares Opens this date on Aviasales
#7 · Southwest 4008
7:05 AM → 8:10 AM3h 05m nonstop
Local times, typical schedule. Last flown 2026-04-05.
83%
chance on time
On time (history)
77%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 77% of the time (13 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 60%).
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
- Short track record (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 4008 fares Opens this date on Aviasales
#8 · Southwest 2977
12:25 PM → 1:20 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
On time (history)
82%
Cancelled
2.2%
Avg arrival delay
9 min
- Arrived on time 82% of the time (45 flights, Jun 2025 to May 2026).
- Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (45 flights), so its score leans on the airline's record at this hour.
Limited track record · 45 flights
Find Southwest 2977 fares Opens this date on Aviasales
#9 · Southwest 3174
10:45 PM → 11:50 PM3h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
79%
chance on time
On time (history)
87%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 87% of the time (23 flights, Jun 2025 to May 2026).
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 3174 fares Opens this date on Aviasales
#10 · Southwest 2184
2:20 PM → 3:15 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-30.
77%
chance on time
On time (history)
83%
Cancelled
0.0%
Avg arrival delay
7 min
- Arrived on time 83% of the time (24 flights, Jun 2025 to May 2026).
- Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Southwest 2184 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Southwest Airlines76%
2,167 flights · 76% on time as flown · 0.3% cancel
Delta Air Lines69%
365 flights · 69% on time as flown · 0.7% cancel
Frontier Airlines69%
289 flights · 69% on time as flown · 1.3% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM97%
512 flights · avg delay 2 min
9 AM to noon86%
351 flights · avg delay 8 min
Noon to 3 PM74%
483 flights · avg delay 14 min
3 to 6 PM68%
834 flights · avg delay 23 min
6 to 9 PM60%
485 flights · avg delay 23 min
After 9 PM65%
205 flights · avg delay 25 min

Best day: Tuesday (84%). Worst: Thursday (73%).

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

What delays this route

Late-arriving aircraft51%
Airline (crew, maintenance, boarding)30%
Air traffic control and airport volume16%
Severe weather3%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

AUS to LAS questions

What time of day is best to fly AUS to LAS?: Before 9 AM: 97% of flights arrived on time, against 60% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from AUS to LAS?: Southwest, with a season-adjusted 76% chance of operating and arriving on time over 2,167 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on AUS to LAS?: July (69% on time); the best was November (82%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?: No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from AUS

Live status: FAA delays and ground stops

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