61.159 (a)(1) 500 hours of cross-country flight time.
61.1 (b)(4)(vi) states:
For the purpose of meeting the aeronautical experience requirements for an airline transport pilot certificate (except with a rotorcraft category rating), time acquired during a flight--
(A) Conducted in an appropriate aircraft;
(B) That is at least a straight-line distance of more than 50 nautical miles from the original point of departure; and
(C) That involves the use of dead reckoning, pilotage, electronic navigation aids, radio aids, or other navigation systems.
Look at 61.1 (b)(4)(vi)(B) – doesn’t mention landing. Yet 61.1 (b)(4)(ii) through 61.1 (b)(4)(v) does mention landing. For the purpose of cross country aeronautical experience towards the ATP, landings at an airport X distance away are not required. Landings at an airport of X distance away are required for the purposes of earning aeronautical experience towards commercial, see 61.1 (b)(4)(ii)(B)
In a nutshell, landings are another airport of a given distance are required to consider it cross country for the purpose of aeronautical experience towards the private, instrument, commercial airplane ratings. However, landings are not required for it to be considered cross country aeronautical experience for the ATP.
Does that help clarify my earlier statement?