Delta Air Lines

The fiercely competitive airline business is turning to technology in the battle for customers.

Since American Airlines began testing Wi-Fi service on live flights in August 2007 and JetBlue Airways began its BetaBlue project in December 2007, other airlines are following suit, including Delta Air Lines and Virgin Atlantic Airways.

On Tuesday, Delta said it would roll out Wi-Fi access to passengers on its entire fleet for a fee. JetBlue, which has been collecting customer feedback, also plans to expand the service throughout its fleet.

CHICAGO (Reuters) - AMR Corp's American Airlines said it canceled 933 flights on Thursday as it continued to reinspect wiring on MD-80 aircraft, raising the number of flights scratched since Tuesday to nearly 2,500.

The disruption at the No. 1 U.S. airline has wreaked havoc at the nation's busiest airports.

Dallas Fort Worth, American's largest hub, had 269 flights canceled on Thursday. The airline canceled 123 flights at O'Hare airport in Chicago.

More than 100,000 travelers have been affected by the cancellations, the airline estimates.