Which airline is most reliable for ATL (Atlanta) to DEN (Denver)?

The most reliable airline on the ATL to DEN route is United Airlines, with an on-time arrival rate of 86%.

How often are flights delayed from ATL to DEN?

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

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

When flights from ATL to DEN are delayed, the average delay is approximately 63 minutes.

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

With 77% of ATL to DEN flights arriving on time and an average delay of 63 minutes when late, a connection under 60 minutes at DEN is risky. We recommend at least 75-90 minutes for domestic connections after this route.

ATL → DEN

ATL (Atlanta) to DEN (Denver)

ATL (Atlanta) to DEN (Denver) flights arrive on time 77% of the time. The most reliable airline on this route is United Airlines at 86%. The average delay is 63 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 → DEN on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

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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?

United Airlines is significantly more reliable on this route at 86% on time vs Frontier Airlines at 65%.

Airline Comparison

United Airlines leads at 86% on time; Frontier Airlines trails at 65%.

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 DEN

79% on time

When flights into DEN are late, the average delay is 69 minutes. Build buffer if you have ground plans.

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

More about DEN →Connection times at DEN →

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ATL Airport DEN Airport

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