how many routes does American Airlines have?
select count(*) from airlines as t1 join routes as t2 on t1.alid = t2.alid where t1.name = 'American Airlines'
How many destinations do these routes go to?
select count(distinct dst_apid) from airlines as t1 join routes as t2 on t1.alid = t2.alid where t1.name = 'American Airlines'