Delta ATL Departure Delay Hotspots

—Worst Hotspot

Worst Recurring Departure Delay Hotspot

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Worst Avg Delay

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min — worst hotspot

P90 Delay (worst slot)

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min — 1-in-10 flights exceed this

Del-15 Rate

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% flights ≥15 min late (worst slot)

Credible Months

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qualifying months of data (worst slot)

Avg Departure Delay Heatmap — Destination × Time Block (top 15)

Avg delay:

Low (<15 min)

Elevated (15–22 min)

Severe (>22 min)

No data

□ = worst cell highlighted

EWR 1600–1659 Monthly Delay Persistence (all qualifying months)

Avg departure delay & del-15 rate per month for the single worst hotspot — structural persistence across decades.

Top Hotspots — ≥24 Credible Months

#	Dest	Time Block	Avg Delay	P90 Delay	Del-15 %	Flights	Credible Mo.

Data Provenance — Query Ledger

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