Business class is always the way to go.  You do not have to settle for economy class airfare.  You will feel much better through the trip and once you arrive than if you chose the economy side where you could be stuck to a group a kids or babies.  You receive more room to stretch, better service, food, and drinks. The goal is to always find a low price ticket for business class airfare.  In the past, this was much more difficult.  These days, most airlines will give you a special price on these airfares.  If you happen to be with a company that has made a deal with an airline, then you are one of the lucky few with permanent discounted fare.

Those are the lucky ones because they do not have to do any searching, but you can still get a ticket for a low price without much trouble.  Check all the airlines' sites first.  Be sure to visit them from time to time so you will become familiar with the prices and what special deals they offer for your destinations.

Next, try using websites such as Expedia and Travelocity.  Each of them have made deals with airlines to buy large amounts of tickets and then they are trying to get rid of these tickets as soon as they can.  You end up earning a decent chunk of the profits when they are trying to dump all the tickets off to customers at low prices. 

There are also search engines on travel sites and other sites made just for searching.  This will give you many advanced searching options and bring up all the best fares on a certain date, be sure to try different dates. 

Always be sure to book your flights early to increase the chances of getting a cheaper flight, and during the correct months prices will be lower.  Also try using the times of early morning or in the middle of the day to lower the price even more. 

Finally, sign up for all the notifications that sites offer so you are always up to date on the latest deals and offers.