Passengers at Delta's hub in Salt Lake City should see the service on their flights by end end of this year, Delta spokesman Anthony Black said.

Delta is partnering with Aircell, an airborne communications provider, to install the Wi-Fi service network on Delta's domestic fleet of more than 330 aircraft.

The system will allow Delta customers traveling with Wi-Fi-enabled devices - such as laptops, smartphones and PDAs - to access the Internet while in flight.

The service will be offered initially on Delta's fleet of 133 MD88/90 aircraft and will expand to the remaining domestic fleet of more than 200 Boeing 737, 757 and 767-300 aircraft during the first half of 2009. The carrier expects to have the technology installed on its entire domestic fleet by next summer.

Delta spokeswoman Betsy Talton said the airline is considering options for its international fleet and for aircraft used by its regional flying partners, but has no plans to offer Wi-Fi service on those flights.