Summer City Breaks That Aren’t Overcrowded (Yet)

When the sun's out and the suitcase is calling, it’s tempting to book a quick getaway to Europe’s classic cities. But while Paris and Rome are bursting at the seams by July, there are still stunning alternatives that offer charm, culture, and sunshine - without the crowds.

At Secret Flight Club, we track down the best-value flights to under-the-radar gems so you can enjoy a summer break that feels effortless (and affordable). These less crowded city breaks are perfect for those who like to roam freely, skip the queues, and discover places that still feel like a secret.

1. Ljubljana, Slovenia

Why go: Picture-perfect, compact, and walkable - Ljubljana is the green capital of Europe, both literally and in spirit. Set along a peaceful river, the city offers a mix of baroque architecture, open-air cafés, and a lively yet laid-back summer buzz.

Don’t miss: Paddleboarding through the city centre, climbing to Ljubljana Castle at sunset, and a day trip to Lake Bled (just under an hour away).

Flight deals: We think there is a good chance to see some coming up from £60–£90 from London and Manchester in early summer.

2. Valencia, Spain

Why go: While Barcelona and Madrid draw most of the crowds, Valencia offers beaches, modern architecture, old-town charm, and world-class food - all in one beautifully balanced city. It’s also where paella was born.

Don’t miss: Cycling through the Turia Gardens, rooftop drinks at Ateneo Sky Bar, and exploring the City of Arts and Sciences.

Flight deals: Return fares under £80 from several UK airports, often with hand luggage included.

3. Ghent, Belgium

Why go: Often overlooked for Brussels or Bruges, Ghent blends medieval charm with cool, creative energy. The canals are peaceful, the architecture is dramatic, and the food scene is seriously underrated.

Don’t miss: Climbing the Belfry Tower, visiting the Castle of the Counts, and tasting a local beer on a sunny terrace at Graslei.

Flight deals: We'd recommend flying to Brussels and reach Ghent by train in under an hour. We're keeping an eye one fares with potential to drop to £40–£70.

4. Bologna, Italy

Why go: Skip the Florence crowds and head to Bologna, Italy’s food capital. Think endless porticos, excellent value trattorias, and a city that still feels wonderfully local — even in the peak of summer.

Don’t miss: The view from Asinelli Tower, a bowl of tagliatelle al ragù, and a gelato crawl through the medieval centre.

Flight deals: Return flights often available from £55–£85 from London and regional UK airports.

5. Vilnius, Lithuania

Why go: Vilnius is Europe’s best-kept Baltic secret. Quirky, colourful, and full of surprises, it offers baroque streets, creative districts, and long summer evenings that stretch well past 10pm.

Don’t miss: The bohemian neighbourhood of Uzupis (which declared itself an independent republic), hilltop views from the Gediminas Tower, and coffee in one of the city’s many courtyards.

Flight deals: Return flights from £50–£75 - and costs on the ground are refreshingly low.

Secret Flight Club Tip

Booking early helps - but with our daily alerts, you'll often find last-minute fares that still beat the crowds. These lesser-known cities tend to keep their cool, even in the height of summer.

If you're craving a sunny break with fewer queues, better value, and a more local feel - these are the places to go.

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