No fatalities

BOEING 737-7H4 accident at Chicago, IL, 11 Sept 2022

Chicago, IL, United States

On September 11, 2022, a BOEING 737-7H4 operated by SOUTHWEST AIRLINES CO was involved in an aviation accident near Chicago, IL. No fatalities were reported. Investigators recorded the probable cause as: Southwest Airlines flight crew’s misjudgment of the distance required to safely pass the American Airlines airplane. This summary draws on records from NTSB; 17 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards
BOEING 737-7H4
Photo: San Diego Air & Space Museum Archives / Public domain, via Wikimedia Commons

Probable cause

Southwest Airlines flight crew’s misjudgment of the distance required to safely pass the American Airlines airplane.

— NTSB Determination

Contributing factors

PilotEffect on equipmentPilot of other aircraft