Originally Posted by
apeortdz
Has anyone tried using the Madrid (MAD) Iberia arrivals lounge in T4 lately? We are EXP+PRO travelling in Business class on AA later this month. Access rules seem convoluted so not sure if we can access as Emerald or not. AA740 PHL-MAD. Thanks.
The access rules seem pretty clear, unfortunately. Courtesy access for those arriving in Iberia Business class flights over four hours in length with Madrid as their final destination.
Flights must be operated and/or marketed by Grupo Iberia. 
oneworld Emerald and Sapphire members not also Uberia Plus members must be arriving in Business class on a Grupo Iberia flight with a duration over four hours with Madrid as the final destination.)
Podrás disfrutarlo siempre que realices un viaje en clase Business con destino final Madrid,
en un vuelo operado por el Grupo Iberia de duración superior a 4 horas.
You may enjoy it when you travel in Business with Madrid as your final destination, in a flight with duration greater than four hours operated by Grupo Iberia.
También tendrán acceso nuestros clientes Iberia Plus Platino (en vuelos operados y/o comercializados por Grupo Iberia, por Vueling y vuelos oneworld), Iberia Plus Oro e Iberia Singular (en vuelos operados y/o comercializados por Grupo Iberia) viajando con destino final Madrid con duración superior a 4 horas, independientemente de la clase en la que vuelen.
Our Iberia Plus customers (on flights operated by Grupo Iberia, by Vueling and oneworld flights) have access, Iberia Plus Gold and Iberia Singular (on flights operated and/or marketed by Grupo Iberia) travelling on flights with Madrid as their final destination with duration over four hours, regardless of class of service flown.
Link
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Translation by JDiver)
NOTE: Flights operated by LEVEL do not qualify.