Instead of using miles to travel the globe through the Star Alliance of carriers, however, US Airways customers will have to deal with new international partners through the oneworld alliance, led by American and British Airways.

WSJ: AMR Deal Offers Air Travelers Hope for Better Service

Top 5 airlines by number of international passengers: United, American, Delta, US Airways, Jet Blue.

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While American Airlines showed a solid performance in its international flights, US Airways saw stronger activity in its domestic flights.

FORBES: Split The Booty: American Airlines Takes International, US Airways Takes Domestic