Allegheny Airlines Flight 485 crashes on approach to Tweed New Haven Airport in New Haven, Connecticut, killing 28 of 31 aboard.

Allegheny Airlines Flight 485 was a regularly scheduled domestic passenger flight between Washington, D.C. and Newport News, Virginia, United States, with three stop-overs, two in Connecticut and a third in Pennsylvania. On June 7, 1971, the Allegheny Airlines Convair CV-580 operating the flight crashed on approach to Tweed New Haven Regional Airport, New Haven County, Connecticut.

Tweed-New Haven Regional Airport is a public airport located three miles southeast of downtown New Haven, in New Haven County, Connecticut, United States. The airport is partly located in the City of New Haven and partly in the Town of East Haven. It is one of two airports with regularly scheduled commercial service in Connecticut, the other being Bradley International Airport in Windsor Locks.

New Haven is a city in the U.S. state of Connecticut. It is located on New Haven Harbor on the northern shore of Long Island Sound. With a population of 135,319 at the 2020 census, it is the third-most populous city in Connecticut and the largest in the South Central Connecticut Planning Region, while the Greater New Haven metropolitan area has an estimated 577,000 residents.

June 7 is the 158th day of the year in the Gregorian calendar; 207 days remain until the end of the year.