Australia and French Polynesia. I give Delta a really hard time, and deservedly so. But their miles happen to be the best-positioned for the two destinations from North America that I believe are the hardest awards to get. Naturally I’m not talking about actually securing premium cabin awards to Australia on Delta’s own Sydney flight, but on their partner V Australia — their Los Angeles – Brisbane flight especially, I’ve done multiple business class award seats even during the absolute peak of high season (though Delta does add fuel surcharges to V Australia awards, plan to spend $500 per person). Delta also happens to partner with both airlines that fly from the mainland US to French Polynesia, Air Tahiti Nui and Air France.