Is apple care plus for MacBook Air worth it?

AppleCare+, as you know, is an extended service plan that Apple makes available with their products. Without it, for example, your notebook would only be covered for manufacturing defects for a period of one year. Any repairs outside of that, would come at a full cost to you. The key is some of those repairs may cost as much as 50-75% of the device itself. Like any insurance policy, it's a gamble and only you can decide if it's worth the cost to you.

As far as repair costs, the following article should help with that: Mac Service and Repair - Apple Support

Note that it would be impossible for any of us to tell you what any repair will end up costing you. You used the notebook's screen as an example, but depending on the actual issue found, it may also include the notebook's GPU/logic board that needs to be replaced. This drives up the cost significantly.

The $99 out of pocket to replace the screen plus the cost

of AppleCare+ is probably less than 1/2 of what replacing

the screen would cost. Also, the coverage covers 2 incidents

a years. Also, the same applies to the $299 for other accidental

damage.

Then there is always the outside chance that 2 years from now

something on the motherboard simply dies or the screen fizzles,

in which case there is no out of pocket for repair. In any complex

product there can always be some little demon waiting inside

to rear its ugly head.

As far as accidental coverage, it sure beats having to spend the cost

of a new MacBook Air.

A physically damaged display is usually $400-600 depending on the size of the panel. I'm not a fan of extended warranties in general, but I do have AppleCare+ on my Macs.