A Delhi-bound SpiceJet aircraft with 202 passengers onboard had to return to Mumbai airport following a pressurisation failure.

The flight SG 114 which took-off from Mumbai at 11.42am had to return to Mumbai at 12.40pm because of a mechanical problem and its passengers have been deplaned.

"SG 114 did an air turn back on account of a mechanical issue that constrained the pilot to bring the flight back to Mumbai. This was done for the safety of the passengers," a SpiceJet spokesperson said in a statement.

"Alternative arrangements are being made for the passengers to help them reach their destination," the spokesperson added.