Final answer:
It is better to fly to ORD (O'Hare International Airport) rather than MDW (Midway International Airport) when flying with Delta Airlines (DL) if your primary concern is to arrive on time.
Step-by-step explanation:
If your primary concern is to arrive on time, it is better to fly to ORD (O'Hare International Airport) rather than MDW (Midway International Airport) when flying with Delta Airlines (DL).
ORD is a larger airport and serves many more flights compared to MDW.
DL operates more flights out of ORD than MDW, which means there are likely more flight options and a higher likelihood of finding a flight that arrives on time.