A university campus map can be found here.
The closest airports are the Leeds Bradford Airport (LBA) and the Manchester Airport (MAN).
The Leeds Bradford Airport has a Flyer service (A1) taking you to the city centre, more info on the LBA website.
The Manchester Airport has a train station and a coach station: a trip to Leeds takes between 1 and 2 hours, tickets for both can be bought online (e.g. via the trainline app), or at the stations. Make sure your flight time is consistent with the train/coach times as there may be no services between 1am and 4am. Uber would cost about £100.