I use Hawaiian as Southwest doesn't have the daily frequency I need. Southwest is usually cheaper. On Hawaiian I get upgraded to F on almost all interisland flights free so get a snack and drink and bigger seat. My one SW flight last year LIH-HNL they brought one cup of water. At LIH SW goes out of the terminal that does mainland flights too so have to go through all the agricultural scans every time go into that wing. So if go to gate then decide want to go get some food or anything have to do the ag inspection again to get back to the gate. So I stick to HA. For reference I flew 67 segments last year with 63 of them interisland (plus the one SW segment).