Wizz Air’s first Luton-Gibraltar flight took off on Friday 11 December.
The twice-weekly service will operate on Mondays and Fridays.
The UK has a travel corridor with Gibraltar, meaning there is no 14-day self-isolation requirement for those returning to the UK.
This week, Wizz will launch twice-weekly Luton-Madeira flights, operating on Tuesdays and Saturdays, to offer another viable winter sun option.
Owain Jones, Wizz Air UK managing director, said Wizz’s "affordable flights" would open up the Mediterranean peninsula.