A flight from Manchester to Madeira was forced to divert due to a pilot 'feeling unwell'.
The Jet2 aircraft took off from Manchester Airport at 8.28am on Monday to travel to Funchal.
But the Boeing 757 was forced to divert into Porto in Portugal due to the medical situation onboard.
The airline said the flight was diverted as a 'precautionary measure'.
A replacement crew and standby aircraft is being flown to Porto to take passengers to Funchal.
A Jet2 spokesperson said: “Flight LS765 from Manchester to Funchal diverted to Porto as a precautionary measure this morning, due to one of the pilots feeling unwell.
"A standby aircraft and replacement crew will be flown to Porto so that we can get customers on their way to Funchal as soon as possible.”
In a tweet, the airline apologised to passengers for the delay.
The tweet read: "We would like to apologise to customers travelling on #LS765 from #Manchester to Funchal, #Madeira which has diverted into Porto, #Portugal due to an onboard medical situation.
"We are working to get you on your way ASAP. Please see our agents ‘Portway’ at Gate 2 for more info. Tx".
