Hawaiian Airlines and Aloha Airlines said customers have until midnight tonight to take advantage of a $19 one-way special on interisland flights. The airlines also extended the travel period by one day to Aug. 28. Previously, the special fare was good for travel through Aug. 27.

Meanwhile, go! airlines said it has expanded its $1 interisland fare for travel on Wednesday. Customers now have until midnight to purchase the $1 fare. The discount airline previously offered $1 fares for travel today.

Go!'s special fare is good for available seats on all Wednesday flights but customers must purchase a return ticket at a different date.