United Airlines is adding Hilton Head, South Carolina, to its route map as part of a new round of domestic expansion at the Chicago-based carrier.

United will begin flying to Hilton Head, adding flights to the South Carolina resort destination from its hubs at Chicago O’Hare, Newark Liberty and Washington Dulles.

United’s United Express affiliates will operate two daily round-trip flights from Washington starting March 31. Service from Chicago will operate only on Saturdays and Sundays while Newark service will be Saturday-only service. Flights will be seasonal on all routes, scheduled to run through Sept.8. Newark and Chicago flights begin April 6.

From Newark, United also will add daily nonstop service to Pensacola, Florida. United also will upgrade its schedule to Anchorage, Alaska, going from Saturday-only service to daily.

United also announced new service from its West Coast hubs.

Beginning June 6, United will add nonstop service from San Francisco to Columbus, Ohio. And from Los Angeles, service to Eugene, Oregon; Madison, Wisconsin, and Pasco/Tri-Cities, Washington will start March 31.

United has said for the past year that it’s been trying to improve its hub schedules to give local customers more flights and destinations and to give connecting travelers more options. “There’s no substitute for a great network; serving destinations with convenient flight times that our customers want. This is something we continue to expand on in California,” Janet Lamkin, United’s president of California.

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