Distance From RNAS Portland Heliport to Roberts International Airport

The distance from RNAS Portland Heliport () to Roberts International Airport (ROB) is 3097 miles or 4985 kilometers or 2690 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 Portland ( United Kingdom ) to Monrovia ( Liberia )?

A one-way nonstop (direct) flight between Portland and Monrovia takes around 7 hours 7 minutes.

Estimated flight time from RNAS Portland Heliport, Portland, United Kingdom to Roberts International Airport, Monrovia, Liberia is 7 hours 7 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		4985 km
Statute Miles		3097 miles
Nautical Miles		2690 nm
Avg. Time of Flight		7 hours 7 minutes

RNAS Portland Heliport to Roberts International Airport Flight Route Map - to ROB Flight Path

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

Click to see flight route on Google Map between Portland, United Kingdom and Monrovia, Liberia. .

Nonstop flight route between Portland, United Kingdom and Monrovia, Liberia.

Time Difference Between the Airports • - ROB

Time difference between Portland (United Kingdom) and Monrovia (Liberia) is 1 Hours.
Monrovia time is 1 Hours behind Portland.

Location	Local Time
Portland (United Kingdom)	2026-06-19, 00:56:42 BST
Monrovia (Liberia)	2026-06-18, 23:56:42 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

RNAS Portland Heliport ( / EGDP) Portland, United Kingdom

Destination

Roberts International Airport (ROB / GLRB) Monrovia, Liberia