You also might want to check out FF programs that offer "miles for upgrades" or "part miles/part cash" options, because these goals might be easier to achieve in a short time frame. For example, you could upgrade from World Traveller (economy) to World Traveller Plus, or from World Traveller Plus to Club (business class) on a British Airways US-UK flight for 25,000 miles each - and 50,000 miles is a possibility if you each get credit cards with miles bonuses and then charge all your wedding expenses to them. There are "catches", however: e.g. you may not be able to upgrade from the cheapest fares.

You should also think about what is a good value for you on your honeymoon, and what your budget is? For example, will you be in a situation where you need the lowest possible price for airfare and accommodation (and therefore are looking for "free" economy tickets or budget hotel accommodation), or can you afford "average" economy fares/moderate hotels, and would want to use points to get upgraded (eg Economy+ or Business) tickets or upgraded accommodation? These factors will also influence the advice you'll get on FlyerTalk. So provide us with some more details about what you're looking for, and you'll get more detailed advice.