Business travel today is at least as difficult now as it was two years ago

, according to 86 percent of more than 400 corporate travelers recently polled by Orbitz for Business. The biggest gripes included flight delays and cancellations, security lines and carry-on restrictions. Eight of 10 surveyed said they book business travel online and nearly 70 percent said they had a positive experience in doing so. The online poll was conducted using a MarketTools panel of frequent business travelers.