Spot #2 is a very good one and very easy to reach by car.
when you have a car: if you follow the road to the north-east (direct right to #2) and then the M-15 to the east, then take the first exit, go to the left through the tunnel under the road you came of, then to the left again onto the parallel road. when you drive back for about 0.8 to 1km, you're almost directly under the flight path but the aircraft are at a little higher distance. I was able to take very nice pics at that spot.
See the A to B
route on this Google Map.
Have a nice time at Mallorca