If your employer participates, your travel management company or business travel agent can likely calculate how much it will cost to offset the carbon emissions from your flight.

BBC: Business travel gives back

My same Hawaii honeymoon friend was ready to fork out actual cash for business class seats to Australia last year, and his travel agent actually talked him down and was able to upgrade coach seats on Air New Zealand with his United miles (he had already tried).

FORBES: Why You Need A Travel Agent, Part 2