Southwest Airlines to Add Bigger Boeing 737-800 Plane

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Southwest Airlines Co., the world’s biggest low-fare carrier, will add a larger model of Boeing Co.’s 737 to its fleet to carry more passengers on high-demand routes and boost fuel efficiency.

The airline’s decision to switch some existing orders for 737-700s to 737-800s followed the approval today by pilots of contract changes letting them fly the bigger jet, the Dallas- based carrier said in a statement. Flight attendants last month approved similar contract revisions.