Just called Delta and they want $400. per tank from LGA to CZM. Guess the 72s will have to stay stateside!
I did notice delta didn't have a price listed.
Airtran say:
Scuba Equipment - With Tank
1 scuba tank with harness - empty with valve removed, 1 scuba regulator, 1 pressure gauge, 1 mask, 2 fins, 1 snorkel, 1 safety vest, 1 knife, 1 speargun, all packed in a suitable bagI do notice here is says with valve removed. But heck they can put it back in down there.
United looks like $100? Theirs does say empty=40# max