The United MileagePlus Explorer Business Card is an airline cobranded business travel card. It’s designed for businesses that frequently fly with United Airlines. With this card, you will earn 2 miles per dollar with United and at restaurants, gas stations and office supply stores. All other purchases earn 1 mile per dollar. You’ll earn a 50,000-mile sign-up bonus when you spend $3,000 on purchases in the first three months from account opening. As a cardholder, you will get benefits including priority boarding, a free first checked bag for you and a companion on the same reservation, two United Club passes annually, hotel and resort perks including upgrades, early check-in and late checkout, an auto rental collision damage waiver, baggage delay insurance, lost luggage reimbursement, trip cancellation and interruption insurance, trip delay reimbursement, purchase protection, price protection and concierge service.