Atlanta to Las Vegas Flight Delays
Sample size: 14,860 ATL–LAS flights, January 2023 to December 2025 (BTS). 26.47% of Atlanta to Las Vegas flights arrived at least 15 minutes late. That is 2.3 points worse than the 24.2% median for those routes, so schedule padding matters here. Departure time moves the odds more than anything else on this route: 06:00 departures run 10.61% late against 59.86% for 23:00. Wednesday is the calmest day at 21.19%, Sunday the worst at 30.1%. Cancellations (2024 to 2025) peak in July at 3.58% of scheduled flights and bottom out in October at 0.11%. Last updated: 2026-10-01.
These figures are historical US domestic rates, not a forecast for one departure. Use the free delay prediction for your trip before you book.
ATL airport delay guide · LAS airport delay guide · Predict a ATL to LAS flight
Best time to fly ATL to LAS
The best time to fly ATL to LAS is the 6 AM departure and fly on a Wednesday, not a Sunday (21.19% against 30.1%): 10.61% of 6 AM flights arrived 15+ minutes late, against 59.86% at 11 PM.
Lowest observed delay rates depart 06:00–07:00, 09:00. The highest sit at 20:00–21:00, 23:00. Only departure hours with at least 100 recorded flights are listed, so sparse hours are blank rather than estimated.
| Departure hour | Delayed 15+ min | Flights observed |
|---|---|---|
| 06:00 | 10.61% | 754 |
| 07:00 | 14.12% | 963 |
| 08:00 | 19.19% | 1,454 |
| 09:00 | 17.82% | 696 |
| 10:00 | 20.41% | 872 |
| 11:00 | 22.95% | 937 |
| 12:00 | 18.36% | 501 |
| 13:00 | 24.6% | 500 |
| 14:00 | 18.43% | 472 |
| 15:00 | 26.38% | 849 |
| 16:00 | 27.41% | 518 |
| 17:00 | 29.45% | 635 |
| 18:00 | 30.99% | 939 |
| 19:00 | 34.09% | 1,446 |
| 20:00 | 38.04% | 807 |
| 21:00 | 39.13% | 1,380 |
| 22:00 | 35.6% | 896 |
| 23:00 | 59.86% | 142 |
ATL to LAS flight time and distance
Scheduled gate-to-gate time from ATL to LAS is a median 4 h 26 min. Flights actually took a median 4 h 18 min gate to gate, including 3 h 53 min in the air. 2.1% ran 30 or more minutes over schedule and 69.6% arrived sooner than scheduled (BTS data, January 2023 to December 2025).
ATL to LAS is 1,747 miles (BTS data).
| Airline | Scheduled (median) | Actual (median) | In the air (median) | 30+ min over schedule | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 4 h 25 min | 4 h 18 min | 3 h 53 min | 2.1% | 9,718 |
| Southwest Airlines | 4 h 25 min | 4 h 15 min | 3 h 55 min | 1.5% | 1,990 |
| Spirit Airlines (ceased operating May 2026) | 4 h 28 min | 4 h 19 min | 3 h 54 min | 2.7% | 1,738 |
| Frontier Airlines | 4 h 40 min | 4 h 27 min | 3 h 57 min | 2.3% | 1,414 |
How late, and why
When a ATL to LAS flight was late (15+ minutes), it arrived an average of 60 minutes late (median 37). 8.2% of all completed flights arrived an hour or more late (BTS data, 2023 to 2025).
Of the delay minutes on late ATL to LAS flights, 39.8% were caused by the airline (crew, maintenance, ground handling), 31.1% by a late incoming aircraft, 24.2% by the air-traffic system (volume, non-extreme weather, airport operations), 4.6% by extreme weather and 0.3% by security (BTS data, 2023 to 2025).
| Cause | Share of delay minutes |
|---|---|
| airline | 39.8% |
| late incoming aircraft | 31.1% |
| air-traffic system | 24.2% |
| extreme weather | 4.6% |
| security | 0.3% |
BTS assigns causes to delay minutes on flights that arrived 15+ minutes late. "Air-traffic system" includes non-extreme weather that slows traffic.
ATL to LAS delays by day of week
| Day | Delayed 15+ min | Flights observed |
|---|---|---|
| Mon | 28.35% | 2,212 |
| Tue | 22.49% | 2,028 |
| Wed | 21.19% | 2,034 |
| Thu | 29.07% | 2,174 |
| Fri | 29.77% | 2,187 |
| Sat | 23.36% | 2,016 |
| Sun | 30.1% | 2,209 |
Month-by-month cancellation pattern
Share of scheduled ATL–LAS flights cancelled in each month, from BTS 2024–2025 on-time reporting. These are cancellations, not delays. Delay figures on this page cover January 2023 to December 2025.
| Month | Cancelled | Flights scheduled |
|---|---|---|
| Jan | 1.61% | 806 |
| Feb | 0.56% | 720 |
| Mar | 0.76% | 789 |
| Apr | 0.39% | 777 |
| May | 0.23% | 854 |
| Jun | 1.49% | 875 |
| Jul | 3.58% | 893 |
| Aug | 0.85% | 821 |
| Sep | 0.38% | 799 |
| Oct | 0.11% | 886 |
| Nov | 0.24% | 818 |
| Dec | 0.82% | 851 |
Airlines on ATL to LAS: delays and cancellations
Delta Air Lines, Southwest Airlines and Frontier Airlines fly this route today. Spirit Airlines also appear in the history below but has ceased operations. Only carriers with at least 200 scheduled flights on the pairing are listed. Delay rates cover January 2023 to December 2025; cancellation rates cover 2024 to 2025.
| Airline | Share of flights | Delayed 15+ min | Cancelled | Flights scheduled |
|---|---|---|---|---|
| Delta Air Lines | 68% | 23.14% | 0.82% | 6,705 |
| Southwest Airlines | 14% | 22.36% | 0.07% | 1,409 |
| Spirit Airlines (ceased operations 2 May 2026) | 9% | 39.13% | 1.83% | 929 |
| Frontier Airlines | 9% | 39.53% | 2.36% | 846 |
Related pages
- ATL delays: rate, worst hours and live risk
- LAS delays: rate, worst hours and live risk
- US airline cancellation rates
- Thanksgiving and Christmas 2026 flight delay guide
- Predict a ATL to LAS flight
Check your odds: Will my flight be delayed? · Will my flight be cancelled?
ATL vs LAS: airport conditions
Both ends of a route shape its delay profile. These are DelayGuard's operational scores for Atlanta and Las Vegas.
| Measure | ATL (Atlanta) | LAS (Las Vegas) |
|---|---|---|
| Congestion | high | moderate |
| Weather risk | moderate | low |
| NAS vulnerability | high | moderate |
| Average taxi-out | 18 min | 13 min |
| Runways | 5 | 4 |
ATL to LAS questions
- How long is the flight from Atlanta to Las Vegas?
- Scheduled gate-to-gate time from ATL to LAS is a median 4 h 26 min, and flights actually took a median 4 h 18 min including 3 h 53 min in the air. 2.1% ran 30+ minutes over schedule (BTS data, January 2023 to December 2025).
- How often do ATL to LAS flights get delayed?
- Across 14,860 recorded ATL–LAS departures, January 2023 to December 2025 (BTS), 26.47% arrived at least 15 minutes late. Departure time matters most: 6:00 departures run 10.61% late against 59.86% for 23:00. Actual delay frequency varies by airline, time of day, and season.
- What is the best time of year to fly ATL to LAS?
- Atlanta (GA) sees its highest delays during June–September (convective/thunderstorm season). Las Vegas (NV) peaks during November–February (coastal fog) with generally low risk year-round. The dominant seasonal risk on this route sits at the origin (Atlanta) — use the DelayGuard predictor to check conditions for your specific travel date.
- Which airline is most reliable on ATL to LAS?
- On ATL→LAS, Southwest Airlines has the lowest measured delay rate at 22.36% of 1,990 flights, and Frontier Airlines the highest at 39.53% (BTS, January 2023 to December 2025). Southwest Airlines cancels the fewest at 0.07% (2024 to 2025). These are route-specific figures, not airline-wide averages.
- How late are ATL to LAS flights when they are delayed?
- When a ATL to LAS flight was late (15+ minutes), it arrived an average of 60 minutes late (median 37). 8.2% of all completed flights arrived an hour or more late (BTS data, 2023 to 2025).
- How accurate is DelayGuard's delay prediction for this route?
- DelayGuard's delay risk score comes from an ML model trained on BTS data (3.95 million US domestic flights, 2023 to mid-2025), with live weather data (within 5 days of departure) and FAA NAS advisories (within 6 hours) — a likelihood of delay, not a guarantee.
Delay figures reflect arrivals 15 or more minutes late in BTS on-time reporting. Cancellation figures are separate and count flights that never operated. Hours, days and months with fewer than 100 recorded flights are omitted rather than estimated.