Unusual round trips?

[analysis]

Thank you!

[speedbird1960]

A Round Trip Flight does not go in a circle, what it does is return to the same Airport it departed from using the same Flight Number and will go in this case Via (V): Milan (Italy)

http://www.flightradar24.com/data/flights/9u893

I have just found out that this Flight is not a round trip and is due to return using to KIV on 9U894, i will fix this error in the Database.

[analysis]

Is it common that airlines make round trips?
Airline: Air Moldova
Flight: 9U893
From: Chisinau, Chisinau (KIV)
To: Chisinau, Chisinau (KIV)
Comment: Round trip
Aircraft: Airbus A320-211 (A320)
Reg: ER-AXV
Altitude: 33975 ft (10356 m)
V/S: -1152 fpm
Speed: 455 kt (843 km/h, 524 mph)
Track: 246°
Hex: 504D51
Squawk: 6471
Pos: 46.2897 / 10.903
Radar: T-LIPU2

What is the purpose to fly thousands of km in a circle?