Best Time to Fly From Las Vegas (LAS) [2026 Data]

For the best historical chance of an on-time departure from Harry Reid International Airport (LAS), choose a flight scheduled between 5 and 8 a.m. In FlightRecord’s June 2024–May 2026 data, that window departed on time 90.7% of the time, compared with 64.9% for flights scheduled from 5 to 8 p.m.

Key takeaways

• LAS departures scheduled from 5 to 8 a.m. were on time 90.7% of the time, across 84,028 flights.
• Flights scheduled from 5 to 8 p.m. were on time 64.9% of the time, compared with 90.7% in the early-morning window.
• The average departure delay was 7.1 minutes from 5 to 8 a.m. and 22.1 minutes from 5 to 8 p.m.
• November had the strongest historical calendar-month rate at 81.0%; July was lowest at 67.6%.

What is the best time to fly from Las Vegas?

The strongest historical window at LAS is 5 to 8 a.m. The best individual hour was 5 a.m., when 95.0% of departures were on time. These results compare the scheduled departure hour, which makes them useful when two otherwise similar flights differ mainly by time.

LAS’s overall historical departure on-time rate was 76.6% across 367,064 flights in the two-year record. An early flight is not guaranteed to leave on time, but LAS also shows a useful late-night distinction: 11 p.m. departures were 77.5% on time, better than the evening low but still well behind early morning.

How much does a later LAS flight change the odds?

The historical difference is substantial. Flights scheduled from noon through 3 p.m. were 71.7% on time and averaged 18.1 minutes of departure delay. The 5 to 8 p.m. group was 64.9% on time with a 22.1-minute average delay, versus 90.7% and 7.1 minutes from 5 to 8 a.m.

• 5–8 a.m. — 90.7% on time; 7.1-minute average departure delay.
• Noon–3 p.m. — 71.7% on time; 18.1-minute average departure delay.
• 5–8 p.m. — 64.9% on time; 22.1-minute average departure delay.

6 p.m. was the weakest well-sampled hour at 63.6% on time across 18,060 departures. That does not make every flight in that hour a poor choice; it means a time-sensitive itinerary deserves more buffer than a similar early-morning option.

Which months have been most reliable at LAS?

November had the best observed calendar-month result at 81.0% on time. July was weakest at 67.6% on time and a 23.4-minute average departure delay. January was 80.8% on time and February 79.9%; June was also weak at 71.8%. The observed July cancellation rate was 1.9%.

Calendar-month averages help set expectations, not predict a particular trip. They do not identify the conditions facing a specific aircraft, crew, or destination on a future travel day.

Does the airline matter at LAS?

United Airlines recorded 84.5% on time across 29,924 departures, Allegiant 84.1% across 14,690, and Delta 83.9% across 32,430. Southwest, the largest operator with 172,690 departures, recorded 71.6%.

Route mix and departure-time mix differ materially across those airlines, so compare carriers only when they are viable alternatives for the same destination. Use FlightRecord’s route pages or the exact flight-number history before treating an airport-wide airline result as the answer.

How to use this when booking a LAS flight

1. When fares and arrival times are similar, favor a scheduled 5 to 8 a.m. departure for the strongest historical on-time record.

2. Treat a late-afternoon or evening departure as a trade-off and avoid stacking it with the tightest possible connection or a time-critical plan at the destination.

3. Compare the same route at comparable scheduled times, then check the airline’s current status on the day of travel.

See the full LAS reliability page for the underlying hourly and airline data, plus FlightRecord’s best time-of-day guide.

Source and method: FlightRecord aggregated 14,111,289 domestic-flight records from June 2024 through May 2026, reported through BTS Airline On-Time Statistics. The figures describe past scheduled departures, not live airport conditions or a forecast. Read the full methodology.

Frequently asked questions

What is the least delayed time to fly out of LAS?

In this historical dataset, the 5 to 8 a.m. window had LAS’s strongest departure on-time rate at 90.7%. The best individual hour was 5 a.m. at 95.0% on time. These figures summarize past departures, so pair them with current airline information before travel.

What is the worst time to fly from Las Vegas?

The 5 to 8 p.m. window had the weakest broad historical result at 64.9% on time. 6 p.m. was lower at 63.6% on time. An evening departure may still be the best practical option, but its historical reliability was lower than an early flight.

What month is most reliable for flights from LAS?

November was strongest at 81.0% on time, while July was weakest at 67.6%. Those figures are aggregate results from the observed 24-month record; they are not a forecast for a future flight, season, or weather event.

Should I use LAS’s airport average to choose an airline?

Use the airport average as a starting point, then compare airlines on the same route and at similar scheduled times. Carriers serve different destinations and operate different schedules, so a carrier-wide LAS result cannot replace a route-specific or flight-number-specific history.