Since I just went through researching transportation from Houston Hobby Airport to the cruise terminal in Le Porte, I thought I would share my findings.
Enterprize rental at Hobby Airport. 800 713 645-7222
Standard size care=$59.99 dropping off in Seabrook and taking a shuttle to the
cruise ship terminal. Last shuttle on Sat. is 11.45 am. Another option mentioned was to leave the car at the cruise terminal....keys in it. Enterprize charges $3 for this service after hours.
Returning to Hobby
Enterprize rental at the cruise terminal. 1 281 474-4466 (Seabrook office)
Standard size car waiting for you at the cruise terminal=$70.32
NCl does not have a shuttle from Hobby to the cruise ship. On a return they will send a shuttle if 20 or more people need to go to Hobby.Guess you request this at the purser's desk????
Airport America Shuttle 281 530-4000 is $20 per person each way.
Pick you up outside baggage terminal.....need to call then on debarkation in LePorte
Kay's Transport 832 265-5049 a "mom and Pop" one van service $30 per van each way
You make a resevation and call them from the Hobby terminal and the Cruise ship
Was quoted $40-$45 each way per cab. Could be more because it is metered.
It seems that the number of people traveling together would dictate what type of transportation you might use.
Hope this helps.