Distance From Alton Airport to Roberts International Airport

The distance from Alton Airport () to Roberts International Airport (ROB) is 5465 miles or 8794 kilometers or 4746 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.

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How long does it take to travel from Alton ( United States ) to Monrovia ( Liberia )?

A one-way nonstop (direct) flight between Alton and Monrovia takes around 12 hours 33 minutes.

Estimated flight time from Alton Airport, Alton, United States to Roberts International Airport, Monrovia, Liberia is 12 hours 33 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		8794 km
Statute Miles		5465 miles
Nautical Miles		4746 nm
Avg. Time of Flight		12 hours 33 minutes

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

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

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

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

Time Difference Between the Airports • - ROB

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

Location	Local Time
Alton (United States)	2025-12-18, 03:08:16 EST
Monrovia (Liberia)	2025-12-18, 08:08:16 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

Alton Airport ( / ) Alton, United States

Destination

Roberts International Airport (ROB / GLRB) Monrovia, Liberia