We flew American to Hawaii too (in November) and on the way home we took Delta and I thought American was much better. The seats were more spread out, movie screen was better (in Delta they had those tiny overhead ones every few rows, so during our redeye flight home it was staring me and my daughter directly in the face), and the food was better. (We were in 1st class though since it was such a long flight, but I assume the same applies to coach, which is what we normally fly and I hate Delta's coach, it's so packed in.) Also American had power ports in the seat so we could keep the laptop plugged in the whole flight (you need a special adapter for that though). We're taking them again in May to DL.