We flew last week DTW-AMS. Hubby is platinum member. Used miles to buy flight. We have the Delta Platinum AE card. I thought we had to pay for lounge access ay $39pp, but when we went into the lounge in DTW they told us that my husband and 1 guest was allowed in for free. Is that because we flew international? Will we be able to use the lounge here in AMS on our return flight home? Wondering the rules here! Or maybe we just got lucky in DTW!??!