Air France AF99 From Houston to Paris Declares an Emergency and Diverts to Dublin

Air France flight AF99 from Houston to Paris declared an emergency over southwest Ireland early on Monday, October 19, 2026, and diverted to Dublin. The Boeing 777-300ER, registered F-GZNH, landed there at about 05:30 UTC (6:30 a.m. Irish time), according to flight-tracking data.

No statement on the reason could be found from Air France or Dublin Airport at the time of writing. The cause is not known, and nothing in the tracking data shows it.

What the tracking data shows

The flight left gate D18A at Houston Bush Intercontinental at 4:03 p.m. local time on Sunday, October 18, eight minutes behind schedule, and took off at 4:21 p.m., FlightAware data shows. It was due at Paris Charles de Gaulle at 8:15 a.m. local time.

After about seven and a half hours in the air, the jet was cruising at 34,000 feet roughly 70 miles (110 km) off Ireland’s southwest coast, heading east-southeast toward France on its filed route. At about 04:48 UTC it swung left onto a northeasterly track, and four minutes later it began to descend.

By 05:00 UTC the aircraft was transmitting the general emergency code, squawk 7700, at 25,000 feet near the Kerry-Limerick border, according to ADS-B data from the community network adsb.lol. When the code was first selected is not clear from that data.

The 777 held 25,000 feet for several minutes, then descended steadily as it crossed Ireland toward the northeast. It passed 10,000 feet at about 05:19 UTC and reached the coast south of Dublin city at about 05:23 UTC.

From there it flew north over the sea, east of the city, and turned west to line up for landing, still squawking 7700. The jet touched down heading west at about 05:30 UTC and slowed to taxi speed within a minute.

The turn off its route came about 256 miles (412 km) from Dublin Airport. By landing there, the flight stopped roughly 490 miles (785 km) short of Paris, about 45 minutes before it was due at the gate in Paris.

How many passengers and crew were on board, whether anyone needed medical help, and how passengers will continue to Paris had not been published at the time of writing.

What a 7700 squawk does and does not tell you

A transponder squawk code is a four-digit number the crew sets so controllers can identify the flight. Code 7700 is the general emergency code, and flight-tracking sites highlight any aircraft showing it.

The code covers every kind of emergency, from a sick passenger to a technical fault, and it gives no detail on its own. Crews also set it as a precaution, because it gets them priority handling from air traffic control.

That is why the data above can show where and when AF99 diverted, but not why. Only the airline, the crew’s radio calls or an official report can answer that.

Dublin has taken in several transatlantic flights in trouble this year. In September, Delta flight DL45 squawked 7700 and turned back to Dublin during a medical emergency.

AF99 was operated by a Boeing 777-300ER. AeroCorner will update this story if Air France or Dublin Airport give a reason for the diversion.