Low-cost carrier Norwegian is expanding its European network from Manchester and Edinburgh airports.
New routes will run this summer to Barcelona from both airports and also to Alicante and Malaga from Manchester.
Fares have gone on sale on all routes with a lead-in of £34.90 one-way.
This will give the airline six routes from the north-west hub.
Barcelona flights from Manchester start on April 30, followed by Malaga on June 2 and Alicante the following day.
The Edinburgh-Barcelona service starts on June 15 with 15,000 seats available over the summer.
The airline’s chief commercial officer, Thomas Ramdahl, said: “As we continue our huge growth in the UK, these new Manchester and Edinburgh routes complement our existing city and sun destinations across Europe.
“With new aircraft and free in-flight Wi-Fi, we are providing sun seeking Brits throughout the UK with high quality and affordable flights to the most popular destinations.”
Edinburgh airport chief executive, Gordon Dewar, said: “I congratulate Norwegian for recognising the growing international demand for direct links to Edinburgh, and this move shows that they have similar aspirations for growth as we do.”