Delta Air Lines (Atlanta) is planning to add three new domestic routes from its Seattle/Tacoma (SEA) hub in June. According to Airline Route, the airline will add daily Airbus A319 service from SEA to Indianapolis starting on June 18, 2018.
In addition, starting on June 8, 2018, SkyWest Airlines will add daily Delta Connection Embraer 175 flights between SEA and Kansas City.
Also on June 8, 2018, Delta will add daily mainline Boeing 737-800 service between SEA and Washington (Dulles).