There are very mild fuel surcharges on regional flights, about $ 5, but you do have to pay any taxes / fees involved with international travel. (travelcodex.com)
Most regional flights also offer a Business Class product with delectable meals, beverages and additional luggage allowance. (fijiairways.com)
I travel with a family of five and never find enough space on regional flights to the hubs. (travelisfree.com)