How long is the flight time from Roberts International Airport to Cluj-Napoca?

What is the approximate flight time between the places Roberts International Airport, the airport located in Robertsfield, about 35 miles outside of Monrovia, the capital of the Republic of Liberia in West Africa and Cluj-Napoca (Kloiznburg), commonly known as Cluj, the fourth largest city in Romania and the seat of Cluj County in the northwestern part of the country?

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Show reasoning Reasoning

I followed this chain of reasoning:

I know from locally stored knowledge that:
6°14'01"N is the latitude of Roberts International Airport ([fact: ["152584957@trueknowledge.com"]])

46°46'59"N is the latitude of Cluj-Napoca ([fact: ["149527321@trueknowledge.com"]])

10°21'44"W is the longitude of Roberts International Airport ([fact: ["136528668@trueknowledge.com"]])

23°34'58"E is the longitude of Cluj-Napoca ([fact: ["375577635@trueknowledge.com"]])

By calculation (generator: ["distance_between3@trueknowledge.com"]) I know that:
5,547.94031711 kilometres is the distance between Roberts International Airport and Cluj-Napoca

By calculation (generator: ["flight_time_between_two_places@trueknowledge.com"]) I know that:
7 hours is the flight time between Roberts International Airport and Cluj-Napoca

I used the following facts to provide this answer:

6°14'01"N is the latitude of Roberts International Airport

agree disagree edit

46°46'59"N is the latitude of Cluj-Napoca

agree disagree edit

10°21'44"W is the longitude of Roberts International Airport

agree disagree edit

23°34'58"E is the longitude of Cluj-Napoca

agree disagree edit