Route on-time record

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

Las Vegas (Harry Reid International Airport) to Austin (Austin Bergstrom International Airport). 2,868 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 0.4% were cancelled. The most reliable flight number was Southwest 2536 at 5:00 AM.

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

LAS → AUS

Las Vegas to Austin: 2,868 nonstop flights a year

On time (12 months)

74%

Cancelled

0.4%

avg delay 16 min

Best time to leave

Before 9 AM

90% on time vs 58% 6 to 9 PM

Most reliable airline

Frontier

80% chance on time

Check LAS to AUS 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 2536
5:00 AM → 9:35 AM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-29.
90%
chance on time
On time (history)
96%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 96% of the time (23 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 58%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 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 2536 fares Opens this date on Aviasales
#2 · Southwest 552
5:15 AM → 9:45 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
90%
chance on time
On time (history)
94%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 94% 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: 90% on time; 6 to 9 PM: 58%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
Limited track record · 33 flights
Find Southwest 552 fares Opens this date on Aviasales
#3 · Southwest 1653
7:45 AM → 12:20 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 334; its record covers all of them.
85%
chance on time
On time (history)
86%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 86% of the time (70 flights, Jun 2025 to May 2026).
- Never cancelled in 70 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 58%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
Moderate track record · 70 flights
Find Southwest 1653 fares Opens this date on Aviasales
#4 · Frontier 3646
4:07 PM → 8:55 PM2h 48m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
On time (history)
86%
Cancelled
2.2%
Avg arrival delay
9 min
- Arrived on time 86% of the time (132 flights, Jun 2025 to May 2026).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
Moderate track record · 132 flights
Find Frontier 3646 fares Opens this date on Aviasales
#5 · Southwest 2588
1:20 PM → 6:05 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-27.
81%
chance on time
On time (history)
94%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 94% of the time (16 flights, Jun 2025 to May 2026).
- Departs inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 2588 fares Opens this date on Aviasales
#6 · Frontier 4632
4:54 PM → 9:47 PM2h 51m nonstop
Local times, typical schedule. Last flown 2026-05-30.
80%
chance on time
On time (history)
82%
Cancelled
0.8%
Avg arrival delay
12 min
- Arrived on time 82% of the time (131 flights, Jun 2025 to May 2026).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
Moderate track record · 131 flights
Find Frontier 4632 fares Opens this date on Aviasales
#7 · Southwest 655
2:40 PM → 7:25 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-30.
75%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Departs 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 655 fares Opens this date on Aviasales
#8 · Southwest 2538
9:15 AM → 1:55 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 3502; its record covers all of them.
74%
chance on time
On time (history)
72%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 72% of the time (72 flights, Jun 2025 to May 2026).
- Never cancelled in 72 scheduled flights.
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
- Lands inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
Moderate track record · 72 flights
Find Southwest 2538 fares Opens this date on Aviasales
#9 · Southwest 4210
4:30 PM → 9:10 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-04-05.
71%
chance on time
On time (history)
77%
Cancelled
0.0%
Avg arrival delay
13 min
- Arrived on time 77% of the time (13 flights, Jun 2025 to May 2026).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 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 4210 fares Opens this date on Aviasales
#10 · Southwest 3370
11:50 AM → 4:30 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
On time (history)
67%
Cancelled
1.8%
Avg arrival delay
18 min
- Arrived on time 67% of the time (54 flights, Jun 2025 to May 2026).
- Departs inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (54 flights), so its score leans on the airline's record at this hour.
Limited track record · 54 flights
Find Southwest 3370 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Frontier Airlines80%
289 flights · 83% on time as flown · 1.3% cancel
Southwest Airlines74%
2,165 flights · 74% on time as flown · 0.2% cancel
Delta Air Lines67%
365 flights · 67% on time as flown · 0.7% cancel

On time by departure time

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

Before 9 AM90%
867 flights · avg delay 6 min
9 AM to noon75%
449 flights · avg delay 11 min
Noon to 3 PM71%
443 flights · avg delay 16 min
3 to 6 PM63%
870 flights · avg delay 25 min
6 to 9 PM58%
234 flights · avg delay 27 min

Best day: Wednesday (84%). Worst: Sunday (70%).

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 aircraft46%
Airline (crew, maintenance, boarding)35%
Air traffic control and airport volume17%
Severe weather2%

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

LAS to AUS questions

What time of day is best to fly LAS to AUS?: Before 9 AM: 90% of flights arrived on time, against 58% 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 LAS to AUS?: Frontier, with a season-adjusted 80% chance of operating and arriving on time over 289 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 LAS to AUS?: July (67% on time); the best was December (83%), 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.

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