Can I pick up a car from Christchurch City Centre and drop off at Airport?
I can see you didnt make a search (yet) ? Follow the next instructions if you search for one way:-
If you intend to drop off the vehicle in a different location from the pick up location, then tick the box “Return to a different location”. If then no cars are displayed at STEP2, then one way is not permitted between these locations.
For one way rentals sometimes it can be a fee. This is always included in the total rental rate and payable at the desk on arrival.
I looked for you as well and see it is possible. I just sent you a link. Follow that link. From there you can adjust times/days if you need. Press"EDIT" at the left hand side of the results page.