Which airline is most reliable for ATL (Atlanta) to LAS (Las Vegas)?

The most reliable airline on the ATL to LAS route is Southwest Airlines, with an on-time arrival rate of 80%.

How often are flights delayed from ATL to LAS?

About 23% of flights from ATL to LAS experience delays. 77% arrive on time.

What's the average delay on ATL to LAS flights?

When flights from ATL to LAS are delayed, the average delay is approximately 61 minutes.

Is a short connection safe after a ATL to LAS flight?

With 77% of ATL to LAS flights arriving on time and an average delay of 61 minutes when late, a connection under 60 minutes at LAS is risky. We recommend at least 75-90 minutes for domestic connections after this route.

ATL → LAS

ATL (Atlanta) to LAS (Las Vegas)

ATL (Atlanta) to LAS (Las Vegas) flights arrive on time 77% of the time. The most reliable airline on this route is Southwest Airlines at 80%. The average delay is 61 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated July 2026.

ATL → LAS on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

This route is on time most of the time. About 77% of flights arrive on schedule.

Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Accurate?

Southwest Airlines edges out Frontier Airlines on this route — 80% vs 67% on time.

Airline Comparison

Southwest Airlines leads at 80% on time; Frontier Airlines trails at 67%.

Accurate?

Good to know

Departing from ATL

80% on time

Expect ~17 min sitting on the taxiway after your gate pushes back. ATL has long runway queues.

TSA is currently ~30 min. Best time: 4 AM (about 5 min).

More about ATL →

Arriving at LAS

80% on time

When flights into LAS are late, the average delay is 64 minutes. Build buffer if you have ground plans.

If connecting at LAS: TSA is ~14 min right now. Allow at least 60 minutes for a domestic connection.

More about LAS →Connection times at LAS →

Flight cancelled or delayed?

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ATL Airport LAS Airport

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Data last updated July 2026. Source: Bureau of Transportation Statistics.