Ink Business Unlimited Credit Card: The Flat-Rate Travel Enabler. Don't underestimate a simple card. While it doesn't offer specific travel perks, this card earns a flat rate of cash back on every purchase your business makes. That cash back can then be used towards travel. In addition since it works with Chase Ultimate Rewards, points can be combined with points earned from other Chase cards (like the Chase Ink Preferred mentioned above) to allow for more redemption options. Best For: Businesses with simpler spending needs, who want straightforward cashback rewards applicable to any travel booking and want to consolidate points with other chase credit cards.