DATESUBDATE-日期时间差- FineBI帮助文档 FineBI帮助文档 (fanruan.com)
你在前面把它拼成标准的日期就可以计算了
DATESUBDATE(CONCATENATE("2023-08-26"," ",计划到港,":00"),CONCATENATE("2023-08-26"," ",实际落地,":00"),"h")
DATESUBDATE(CONCATENATE("2023-08-26"," ",计划到港,":00"),CONCATENATE("2023-08-26"," ",实际落地,":00"),"m")