Distance From Sierra Nevada Memorial Hospital Heliport to Naha Airport / JASDF Naha Air Base

The distance from Sierra Nevada Memorial Hospital Heliport () to Naha Airport / JASDF Naha Air Base (OKA) is 6113 miles or 9838 kilometers or 5309 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

---

How long does it take to travel from Grass Valley ( United States ) to Naha ( Japan )?

A one-way nonstop (direct) flight between Grass Valley and Naha takes around 14 hours 3 minutes.

Estimated flight time from Sierra Nevada Memorial Hospital Heliport, Grass Valley, United States to Naha Airport / JASDF Naha Air Base, Naha, Japan is 14 hours 3 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • - OKA

Kilometers		9838 km
Statute Miles		6113 miles
Nautical Miles		5309 nm
Avg. Time of Flight		14 hours 3 minutes

Sierra Nevada Memorial Hospital Heliport to Naha Airport / JASDF Naha Air Base Flight Route Map - to OKA Flight Path

Location of Sierra Nevada Memorial Hospital Heliport & Naha Airport / JASDF Naha Air Base is given below.
Click the map to view Grass Valley to Naha nonstop flight path and travel direction.

Click to see flight route on Google Map between Grass Valley, United States and Naha, Japan. .

Nonstop flight route between Grass Valley, United States and Naha, Japan.

Time Difference Between the Airports • - OKA

Time difference between Grass Valley (United States) and Naha (Japan) is 16 Hours.
Naha time is 16 Hours ahead of Grass Valley.

Location	Local Time
Grass Valley (United States)	2026-03-21, 23:08:41 PDT
Naha (Japan)	2026-03-22, 15:08:41 JST

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Sierra Nevada Memorial Hospital Heliport ( / CA15) Grass Valley, United States

Destination

Naha Airport / JASDF Naha Air Base (OKA / ROAH) Naha, Japan