If you had a space suit it looks like 6-8 hours. If you didn’t you lose consciousness after 15 seconds. Die after 90 seconds. 

How much air would you have floating in space I guess your life would be short to about a week maybe as you would not be able to get food 

User21000000

At sea you have more hope of survival but space would be a much more spectacular way to go. Unless I have a small boat, food and water, I will take space.

alter_native

Would you rather?

At sea you have more hope of survival but space would be a much more spectacular way to go. Unless I have a small boat, food and water, I will take space. 