These are all the possible endings per character. Contrary to what some FAQs say, the endings do not have variations if you rescue certain people. The only person that matters is the hero's loved one. Also, Redwin only has 4 endings instead of 5 (in the USA version at least). This has been confirmed by a script dump of the game.

Ending	How to unlock
Capris Ending 1	Escape with Amy and 25 points worth of passengers.
Capris Ending 2	Escape, but let Amy die on the way. Have at least 1 passenger.
Capris Ending 3	Escape, but never rescue Amy. Have at least 1 passenger.
Capris Ending 4	Escape alone.
Capris Ending 5	Escape with Amy and less than 25 points worth of passengers.
Jeffrey Ending 1	Escape with Adela and 25 points worth of passengers.
Jeffrey Ending 3	Escape, but let Adela die on the way. Have at least 1 passenger.
Jeffrey Ending 4	Escape, but never rescue Adela. Have at least 1 passenger.
Jeffrey Ending 5	Escape alone.
Jeffrey Ending 2	Escape with Adela and less than 25 points worth of passengers.
Luke Ending 1	Escape with the Captain and 25 points worth of passengers.
Luke Ending 2	Escape with the Captain and less than 25 points worth of passengers.
Luke Ending 3	Escape, but never rescue the Captain. Have 25 points worth of passengers.
Luke Ending 4	Escape alone.
Luke Ending 5	Escape, but let the Captain die on the way. Have at least 1 passenger.
Redwin Ending 1	Escape with Harry, Stella, Jack and 25 points worth of passengers.
Redwin Ending 2	Escape with Harry, Stella, Jack and less than 25 points worth of passengers.
Redwin Ending 3	Escape, but never rescue any of the kids (or let them die). Have at least 1 passenger.
Redwin Ending 4	Escape alone.