Sidney-Richland Regional Airport is served by 1 airline, flying from/to 2 destinationsLongest flight from Sidney-Richland Regional Airport is Sidney to 🇺🇸 Billings (BIL), which takes around 2 hours. On an airline like Cape Air. More info on this flight route (SDY-BIL).Shortest flight from Sidney-Richland Regional Airport is Sidney to 🇺🇸 Billings (BIL), which takes around 2 hours. On an airline like Cape Air. More info on this flight route (SDY-BIL).