A lounge in Daniel K. Inouye International Airport sits mostly empty as Hurricane Lane approaches the island chain on August 22, 2018 in Honolulu, Hawaii.

Airlines are adding flights from Hawaii, capping airfares and waiving change fees as Hurricane Lane moves closer to the popular vacation destination.

The National Hurricane Center measured maximum sustained winds in the Category 4 storm of 140 miles per hour and said it will likely be southwest of the islands by Friday.

Consumers and lawmakers complained about high fares last year ahead of Hurricane Irma, a Category 5 storm that hit Cuba and Florida, prompting image-conscious airlines to cap prices. Availability and demand are main factors when determining airfares, and airlines need to manually change prices.

United Airlines said it added two flights out of Honolulu to its San Francisco hub on Thursday, including one on a Boeing 777-300, the largest in its fleet. It also reduced fares below what last-minute ticket prices would be. A one-way nonstop flight from Honolulu to San Francisco on United, leaving Friday, ranged from $234 to $339.