We have recently returned from our third visit to Lanzarote. We stay at the Sol Lanzarote all-inclusive, Matagorda, Puerto del Carmen.
Aircraft on final approach to Arrecife (ACE) pass the hotel, on the beach side. No aircraft will be missed if you have a sea-view room, sitting in the pool area, or at the pool side bar.
For the best views, you need to have a sea-view room in block 3 (see pictures below). I would suggest that the following would be the best rooms - 3206, 3207, 3208, 3209, 3210, 3211, 3306, 3307, 3308, 3309, 3310, 3311, 3405, 3406, 3407, 3408, 3410,3411 (note: no room 3409). We have previously stayed in rooms 3306 & 3309 which are 'Superior Room Sea View' on the 3rd floor, configured as twin bed, plus a living room with a sofa bed. On our last visit, we were given a room upgrade, which had limited views of the activity. We believe most of the rooms on the 3rd floor in block 3 are 'Superior Rooms'.
There is good free WI-FI throughout the hotel complex.
The end of runway 03 is only a 15-20 minutes' walk by turning left out the exit to the beach, adjacent to the pool bar. If you turn right out of this exit, after a short walk you will find bars & restaurants, while the approach can still be monitored!
https://maps.app.goo.gl/zW89xFuvTKP6a3cw8