Duluth International Airport is served by 5 airlines, flying from/to 5 destinationsLongest flight from Duluth International Airport is Duluth to 🇺🇸 Peoria (PIA), which takes around 3 hours and 5 minutes. On an airline like National Airlines. More info on this flight route (DLH-PIA).Shortest flight from Duluth International Airport is Duluth to 🇺🇸 Bemidji (BJI), which takes around 35 minutes. On an airline like Bemidji Airlines. More info on this flight route (DLH-BJI).