They had a range of 1300KM
the Yak's true problem was the limited payload. It couldnt carry only 1000KG max, but in hot conditions this was barely or never achieved.
All of its problems where solved with the Yak-141. But it never enterd production due to end of cold war + not really a need for VTOL aircraft. SU-27,33 and MIG 29 and others where showing excellent performance onboard russian aircraft carriers.
Either 1300KM range for yak 38 and no payload, or only 400KM with barely any payload
Graphic of the underside during VTOL stage