Hawaiian Airlines said it has increased its round-trip fare for flights between Hawaii and the Mainland by $30 effective immediately for travel beginning May 1.

The hike is necessary to offset rising operating costs, including higher fuel prices, the company said.

Hawaiian offers nonstop daily service between Honolulu and Los Angeles, San Francisco, San Diego, San Jose, Sacramento, Portland, Phoenix, Seattle and Las Vegas. The airline also offers nonstop service between Kahului, Maui and Seattle, Portland and San Diego.