Look for nonstop flights from your hometown.
Extra flight legs means extra dough, so picking the right honeymoon locale is a smart move. Pick a destination that doesn't require layovers and you can save a lot of money, and a lot of time.
Watch for high-season spikes.
Sure, you don't pick your wedding date based on whether it's high season in your honeymoon destination of choice, but you will save a lot of money if you choose a location that's in the middle of shoulder or even low season.
Fly on off days.
Even if you get married on a Saturday or Sunday, consider heading out on your honeymoon on Tuesday or Wednesday, when you're not competing with as many travelers for seats and the fares may be lower.
Don't just plunk your money down on the first fares you see. Shop around a little and see if the fares go down. Unlike some hotels, airlines don't always have the lowest rates on their own sites.
If you have airline miles, or one of your parents do, this may be a smart time to use them, either for the coach-class flight itself or — better still — for an upgrade to business class or even first class.
Don't get stuck with baggage fees. Unless you're traveling for several weeks, or taking a trip that involves lots of clothing (like skiing) or wardrobe changes (like a cruise ship with formal nights) think through what you'll actually use on your trip and you will probably find that it will fit in a carry on bag.
Don't pay extra for better seats.
Some lines charge extra for bulkhead and exit row seats if you book them in advance, but will give them to you gratuit if they're still available at the airport.
Be strategic in your seat choice.
Another trick: Pick an aisle and a window seat in a row of three toward the back of the plane. Unless the flight fills up, that seat between you will probably remain empty. This way, you can get plenty of space without splurging on an upgrade that could kill your budget.