6. MiG-21
Joined the Service: 1955
Producer: Russian Aircraft Corporation MiG
Price: *$25.2 million
The MiG-21, from the Mikoyan Gurevich Design Bureau, became an iconic Soviet fighter, setting records and exporting widely to nations like Romania, Croatia, and India.
Of 11,496 built, 10,645 came from UNAC production lines. Priced near $25.2 million, its speed and simplicity gave it longevity in air combat history.
MiG-21
Source: Twitter.com / Rowdy Rathore
It is the most produced supersonic jet and the most manufactured combat aircraft since the Korean War period.
After the F-16 and F-15, it ranks third in production run length for fighters, with continued service underscoring reliability and legacy.