An aircraft flies 100 NM at a groundspeed of 107 kt. Approximately how long does the leg take?

Use $time=distance/GS$: $100/107$ hours is about 0.935 hours. Multiplying by 60 gives approximately 56 minutes. The calculation uses groundspeed, because groundspeed determines how quickly distance over the ground is covered.\n\n**Key takeaway:** Calculate en-route time with distance divided by groundspeed.\n\n**Glossary:** **GS**: groundspeed; **kt**: nautical miles per hour.