Delta retires Northwest Web site, flight numbers

Those who booked Northwest flights are now booked on identical Delta flights and can use the same confirmation numbers, according to Delta. The airline said the switch should not change itineraries and passengers do not need to take any action. Northwest's on Jan. 31 started bumping visitors directly to

Delta said it has extra customer service employees at airports and call centers to deal with issues arising from the transition, including helping agents from Northwest with their use of the Delta reservation system.

"It's gone quite well," said Delta spokeswoman Betsy Talton.

Delta closed its merger with Eagan, Minn.-based Northwest in October 2008 and is completing the final steps of the integration.

Last week, the airline opened renovated "Delta North" offices near Minneapolis St. Paul-International Airport. Delta's Minneapolis-St. Paul offices house some administrative operations that are not at the company's headquarters in Atlanta.

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