Delta SkyMiles® Platinum Business American Express Card is great mid-range Delta business card option. 

As a Delta Platinum Business cardholder, you'll get 15% off Delta award flights booked on delta.com or the Fly Delta app. You'll receive $2,500 Medallion Qualification Dollars each Medallion Qualification Year, helping you get closer to elevated Status for the next Medallion® Year. You'll also earn 1 Medallion® Qualification Dollar for each $20 in purchases on your Delta SkyMiles® Platinum Business American Express Card in a calendar year. With this card, you can also earn up to $10 back in statement credits each month after using your Delta SkyMiles® Platinum American Express Card to pay for U.S. rideshare purchases with select providers (enrollment required). Another perk is a statement credit of up to $150 after using your Delta SkyMiles® Platinum Business  Card to book prepaid hotels or vacation rentals through Delta Stays on delta.com.

Each year after your Card renewal, you'll receive a Companion Certificate for a Delta Main Cabin round-trip flight within the U.S. and to Mexico, the Caribbean, or Central America. Want free upgrades? Card Members with an eligible ticket will be added to the Complimentary Upgrade list, after Delta SkyMiles Medallion Members and Reserve Card Members. You'll also receive a $120 statement credit toward TSA PreCheck® or Global Entry. In addition, you’ll get up to $10 per month (up to $120 per year) in statement credits after you pay with your enrolled Delta Platinum Card at U.S. Resy restaurants or for other eligible Resy purchases.

With this card, you’ll earn 3 miles per $1 spent on Delta purchases and hotel stays made directly with the hotel, 1.5 miles per $1 spent on transit including rideshares, taxicabs, and more, at U.S. shipping providers, and on single eligible purchases of $5,000 or more, and 1 mile per $1 spent on all other purchases.