• A Pakistan Army School of Aviation Schweizer 300C crashed into the Chenab river in Pakistan, two occupants killed. - 23rd May 2012
  • A Greek Lockheed Martin F-16C Block 52 Fighting Falcon, 514, of 343 Mira, and Turkish Lockheed Martin F-16C Fighting Falcon, 93-0684, of 192 Filo, collide over the Aegean Sea as the Greek pilot attempts to intercept the Turkish, after an alleged airspace violation. The Greek pilot, Flight Lieutenant Konstantinos Iliakis, is presumed dead, but the Turkish pilot, 1st Lieutenant Halil Ibrahim Ozdemir, is rescued. - 23rd May 2006
  • Frontier Airlines begins service to Philadelphia, Pennsylvania; Billings, Montana; and Spokane, Washington. - 23rd May 2004
  • Shamu One, a Southwest Airlines Boeing 737-300 painted like and named after a SeaWorld killer whale, begins flying for the airline. - 23rd May 1988
  • Argentina loses seven aircraft during raids against British warships in Falkland Sound and San Carlos Water. - 23rd May 1982
  • A drunken U.S. Air Force assistant crew chief, Sgt. Paul Adams Meyer, 23, of Poquoson, Virginia, suffering anxiety over marital problems, starts up a Lockheed C-130E Hercules, 63-7789, c/n 3856, of the 36th Tactical Airlift Squadron, 316th Tactical Airlift Wing, on hardstand 21 at RAF Mildenhall and takes off in it at 0655 hrs. CET, headed for Langley AFB, Virginia. At least two North American F-100 Super Sabres from RAF Lakenheath, a C-130 from Mildenhall, and two RAF English Electric Lightnings are sent aloft to try to make contact with the stolen aircraft. The Hercules crashes into the English Channel off Alderney (5000N, 0205W) ~90 minutes later. In the last transmission from Meyer, to his wife, in a link-up over the side-band radio, he stated "Leave me alone for about five minutes, I've got trouble." There is speculation whether the Hercules was shot down. Some wreckage was recovered but the pilot's body was never found. Meyer had been arrested for being drunk and disorderly earlier in the morning in the village of Freckenham and had been remanded to quarters, but sneaked out to steal the Hercules. - 23rd May 1969
  • First flight of Hawker Siddeley Nimrod - 23rd May 1967
  • President Lyndon B. Johnson‘s administration prohibits any American air attacks within a 10-mile (16-km) radius of Hanoi. - 23rd May 1967
  • A Learjet 24 takes off for a round the world flight as a demonstration of its capabilities. - 23rd May 1966
  • Death of Ernest William Norton, Welsh WWI flying ace and RAF senior officer post WWI. - 23rd May 1966
  • (23-26) Round-the-world demonstration flight by a new Learjet 24 to exhibit its capabilities; flight time was 50 hours and 20 min. - 23rd May 1966
  • Death of Julius Buckler, German WWI fighter ace. - 23rd May 1960
  • Flying a Douglas F4D-1 Skyray, USMC Major Edward N. LeFaivre breaks 5 world climb-to-height records, including 15,000 m (49,221 feet) in 2 min 36 seconds. - 23rd May 1958
  • A Nike Ajax missile of Battery B, 526th AAA Missile Battalion, exploded accidentally at a battery at Site NY-53 near Leonardo, New Jersey at 1315 hrs. on this date, setting off six other missiles of A Section, killing 6 soldiers and 4 civilians. The nearest missile in B Section had its booster ignited by flying shrapnel and it flew into a nearby hill, but the warhead fortunately failed to explode. This was the first fatal Nike Ajax accident. A memorial can be found at Fort Hancock in the Sandy Hook Unit of Gateway National Recreation Area. - 23rd May 1958
  • First flight of The PZL-102 Kos, Polish two-seat touring and training monoplane. - 23rd May 1958