Wizz Air will launch flights between London and Sarajevo in Bosnia and Herzegovina in May.
The budget airline will also add two more flights a week to Suceava in Romania and additional weekly flights to Athens, Reykjavik and Dalaman.
From 21 May, it will offer two flights a week from London Luton to Sarajevo International Airport.
With the new routes, Hungary-based Wizz will offer 144 routes from 12 UK airports.
Wizz Air UK MD Owain Jones said: "Travel is currently restricted due to government regulations, but at Wizz Air we are already looking ahead to a brighter future in which holiday travel is possible again."
