Distance From Thorn Airport to Roberts International Airport

The distance from Thorn Airport () to Roberts International Airport (ROB) is 5215 miles or 8392 kilometers or 4528 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 Custer ( United States ) to Monrovia ( Liberia )?

A one-way nonstop (direct) flight between Custer and Monrovia takes around 11 hours 59 minutes.

Estimated flight time from Thorn Airport, Custer, United States to Roberts International Airport, Monrovia, Liberia is 11 hours 59 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 • - ROB

Kilometers		8392 km
Statute Miles		5215 miles
Nautical Miles		4528 nm
Avg. Time of Flight		11 hours 59 minutes

Thorn Airport to Roberts International Airport Flight Route Map - to ROB Flight Path

Location of Thorn Airport & Roberts International Airport is given below.
Click the map to view Custer to Monrovia nonstop flight path and travel direction.

Click to see flight route on Google Map between Custer, United States and Monrovia, Liberia. .

Nonstop flight route between Custer, United States and Monrovia, Liberia.

Time Difference Between the Airports • - ROB

Time difference between Custer (United States) and Monrovia (Liberia) is 5 Hours.
Monrovia time is 5 Hours ahead of Custer.

Location	Local Time
Custer (United States)	2026-03-22, 10:08:07 CDT
Monrovia (Liberia)	2026-03-22, 15:08:07 GMT

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

Thorn Airport ( / MI19) Custer, United States

Destination

Roberts International Airport (ROB / GLRB) Monrovia, Liberia