Atlanta (ATL) to Las Vegas (LAS): On-Time Performance
Data through July 2026
Atlanta (ATL) to Las Vegas (LAS) effectively runs on two schedules. In October 2024, 88% of arrivals were on time; in July 2024 that fell to 58% — a 30-point seasonal swing. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (83% vs 67%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 13
- last 12 months
- Duration
- 4h 25m
- scheduled
- Distance
- 1,747 mi
Best airline from ATL to LAS
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 78% | 13 min | 0.3% | 1,532 |
| Delta Air Lines | 77% | 15 min | 1.0% | 7,060 |
| Spirit Airlines | 71% | 20 min | 1.8% | 712 |
| Frontier Airlines | 63% | 33 min | 2.7% | 992 |
Monthly on-time trend
Best time to fly from ATL to LAS
Aim for departures around 6 a.m. (91% on-time); avoid 10 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 72% | 19 min |
| Tuesday | 79% | 14 min |
| Wednesdaybest | 81% | 10 min |
| Thursday | 72% | 17 min |
| Friday | 74% | 20 min |
| Saturday | 78% | 16 min |
| Sunday | 71% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft28%
- Airline operations43%
- National airspace system23%
- Weather6%
Frequently asked questions
- How often are flights from ATL to LAS delayed?
- 25% of ATL–LAS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from ATL to LAS?
- Southwest Airlines has the best on-time record on this route at 78%, based on 1,532 flights. 4 airlines flew ATL–LAS frequently enough to compare in this period.
- What is the best time of day to fly from ATL to LAS?
- Departures around 6 a.m. have the best record (91% on-time), while departures around 10 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ATL to LAS?
- The scheduled ATL–LAS flight time averages 4h 25m over 1,747 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are ATL to LAS flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from ATL to LAS?
- July 2024 was the roughest month in this dataset, with only 58% of arrivals on time. The best was October 2024 at 88%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 10,296 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.