Which airline is most reliable for ATL (Atlanta) to ORD (Chicago)?

The most reliable airline on the ATL to ORD route is Southwest Airlines, with an on-time arrival rate of 79%.

How often are flights delayed from ATL to ORD?

About 25% of flights from ATL to ORD experience delays. 75% arrive on time.

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

When flights from ATL to ORD are delayed, the average delay is approximately 47 minutes.

ATL → ORD

ATL (Atlanta) to ORD (Chicago)

ATL (Atlanta) to ORD (Chicago) flights arrive on time 75% of the time. The most reliable airline on this route is Southwest Airlines at 79%. The average delay is 47 minutes. Delays on this route are most often caused by weather.

Source: Bureau of Transportation Statistics. Updated March 2026.

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ATL → ORD on-time performance by month

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This route is delayed fairly often. About 75% of flights arrive on schedule.

Delays on this route are most often caused by weather.

Southwest Airlines edges out JetBlue Airways on this route — 79% vs 73% on time.

Airline Comparison

Southwest Airlines leads at 79% on time; JetBlue Airways trails at 73%.

ATL Airport ORD Airport

Check the return: ORD → ATL

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