Delta Air Lines on May 7, 2026, will add daily nonstop service between Seattle and Philadelphia, the carrier announced Friday. Flights will operate with A321neo aircraft configured with Delta First, Comfort and Main cabins.
"Philadelphia has been a top-requested destination from our Seattle corporate customers, and this new service reflects our commitment to investing in the routes that matter most to them while building an even stronger network from the Pacific Northwest," Delta VP of network planning Amy Martin said in a statement.
In addition, Delta on May 7 will add a fourth daily flight between Seattle and Boston, moving up a previously announced start date from June. The carrier also on that date plans to add frequencies between Seattle and each San Jose and Ontario in California, increasing to five times and four times daily, respectively.