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4. Lufthansa
Customers flying Lufthansa can expect to see a refreshed airline under new leadership. In September 2010, Christoph Franz, former CEO of Swiss International Air Lines took charge.

One of Franz's first major announcements was a plan to spend $4.7 billion on 48 new planes, scheduled to come online in 2012. Upgrades of existing jets are in the works, too -- first-class cabins in its Airbus 380s will be getting a facelift. Planes old and new will be getting in-flight wireless again too, as the service is reintroduced.

And thanks to the revival of a deal with Warren Buffett's NetJets, passengers who want to charter private jets will be able to book flights to more destinations in the Middle East and U.S.

The company will be adding new destinations this summer for regular fliers as well, including Antayla on the coast of Turkey, Palermo in Italy and Trondheim in Norway.

NEXT: Air France
Last updated March 30 2011: 1:06 PM ET
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