Where are you going from/to? I would seriously compare the prices online versus what you might get from a high volume travel agent.

Also, depending on the time you want to travel and the flexibility of your schedule, consider booking and paying out of places like Columbo. Ok, it might add another stop - but the price differential can be significant.

If you can provide some more details, I'm sure there are smarter people on here than me who can easily help.

Good luck.