Factbox-Flights, airports affected by U.S. FAA system outage

Commercial Airplanes are pictured parked at gates after flights were grounded during an FAA system outage at Laguardia Airport in New York City, New York, U.S., January 11, 2023. REUTERS/Mike Segar

U.S. flights were slowly beginning to resume departures and a ground stop was lifted after the Federal Aviation Administration (FAA) scrambled to fix a system outage overnight that forced a halt to all U.S. departing flights.

Here's what we know so far:

NUMBERS OF FLIGHTS:

FILE PHOTO: American Airlines planes are seen at the Tampa International Airport as airports around the country are awaiting for Verizon and AT&T to rollout their 5G technology, in Tampa, Florida, U.S., January 19, 2022. REUTERS/Octavio Jones

* A total of 4,314 flights were delayed within, into or out of the United States as of 1411 GMT, flight tracking website FlightAware showed, without specifying the cause of the delays

* Another 758 flights within, into or out of the country were cancelled

* Some 21,464 flights are scheduled to depart airports in the United States on Wednesday with a carrying capacity of nearly 2.9 million passengers, data from Cirium shows

Passengers wait for the resumption of flights at O'Hare International Airport after the Federal Aviation Administration (FAA) had ordered airlines to pause all domestic departures due to a system outage, in Chicago, Illinois, U.S., January 11, 2023. REUTERS/Jim Vondruska

* American Airlines has the most departures from U.S. airports with 4,819 flights scheduled, followed by Delta Air Lines and Southwest Airlines, the Cirium data showed

INTERNATIONAL:

* The operator of Paris' international airports - Paris Charles de Gaulle and Orly - said it expects delays to flights.

Passengers wait for the resumption of flights at O’Hare International Airport after the Federal Aviation Administration (FAA) had ordered airlines to pause all domestic departures due to a system outage, in Chicago, Illinois, U.S., January 11, 2023. REUTERS/Jim Vondruska

* Virgin Atlantic said some U.S. departures may be affected by the outage and asked customers due to travel on Wednesday to check their flight status.

* Air France, Lufthansa, British Airways and Iberia, which are both owned by IAG, continue to operate flights to and from the United States as normal for now.

* Iberia said it could operate with an alternative system, while the French airline said it was monitoring the situation.

* Scandinavian airline SAS said it is not affected. It has one flight due to land in the United States later on Wednesday.

(Reporting by Reuters; compiled by Josephine Mason; editing by Jason Neely and Conor Humphries)