Here's a suggestive itinerary for a 3-night holiday in Ibiza from the UK:

Day 1:

• Fly from the UK to Ibiza and arrive in the morning or early afternoon.
• Check into your accommodation and freshen up.
• Head to Ibiza Town, the island's capital, and explore its charming streets, historic sites, and local shops.
• Visit Dalt Vila, the UNESCO-listed old town, and enjoy panoramic views from the top.
• In the evening, experience the vibrant nightlife of Ibiza by visiting iconic clubs like Pacha or Amnesia.

Day 2:

• Start the day with a visit to one of Ibiza's beautiful beaches. Playa d'en Bossa and Talamanca are popular choices.
• Relax on the beach, soak up the sun, and swim in the crystal-clear waters.
• In the afternoon, take a boat trip to the nearby island of Formentera, known for its pristine beaches and turquoise waters.
• Explore the island, rent a bike or scooter, and enjoy the stunning landscapes.
• Return to Ibiza in the evening and have dinner at a beachfront restaurant, followed by a chilled-out beach party.

Day 3:

• If you're interested in exploring the island's natural beauty, take a day trip to Es Vedrà, a mystical rock formation located off the southwest coast of Ibiza.
• Hire a boat or join a guided tour to get closer to Es Vedrà and admire its stunning cliffs and wildlife.
• Alternatively, you can opt for a jeep safari to discover Ibiza's hidden gems, such as secluded coves and scenic viewpoints.
• In the evening, visit San Antonio, another popular town in Ibiza, famous for its beautiful sunset views. Enjoy the sunset at Café del Mar or Café Mambo while sipping cocktails.

Day 4:

• On your last day, explore some of Ibiza's lesser-known towns and villages, such as Santa Eulalia or San Jose.
• Check out from your accommodation and head to the airport for your return flight to the UK.

Remember that this is just a suggestive itinerary, and you can adjust it according to your preferences and interests. Ibiza offers a wide range of activities, from partying to exploring nature, so make sure to customize your trip to make the most of your time on the island.