Delta launching DFW-Seattle service as battle with American continues

Delta Air Lines is expanding in American Airlines' backyard. Delta Air Lines Inc. (NYSE: DAL) will launch new daily service between Dallas Fort Worth International Airport and Seattle on June 8, the Atlanta-based carrier announced Monday. The service includes three daily flights from DFW to Seattle, and three more from Seattle to DFW each day. Here's the schedule Delta proposed for the service: The addition is part of a broader strategy by Delta to expand in Seattle, including more service to…