Cheap flights from London to Karlsruhe/Baden-Baden

September is the cheapest month to fly this route, and it is also one of the easiest: the summer crowds have gone and the Black Forest is still warm enough for walking. Midweek departures tend to cost less than Friday or Sunday flights, and the quietest departures are usually early morning or late evening. School holidays, the Christmas market season and the run-up to Easter push fares up, so book well ahead if your dates fall there. For the rest of the year, fares firm up in the last few weeks before departure, so booking a month or two out is usually enough.

Ryanair and Ryanair UK are the low-cost names you will see most on this route, alongside Eurowings, Air Baltic and Mokulele Flight Service. Swiss, Austrian, Lufthansa City Airlines, Helvetic Airways and Edelweiss Air are the full-service carriers, and they often mean a connection through a hub instead of a direct flight. On a low-cost ticket the fare covers your seat and a small cabin bag, with a checked bag, a seat choice and food as paid extras. Full-service fares usually bundle more, which can make them competitive once you add the extras to a budget fare. Check which airline actually operates the flight, not just the brand on the ticket.

Flights land at Baden Airpark, the airport serving both Karlsruhe and Baden-Baden. It sits outside both cities, so plan the last leg before you book: buses and trains run into Karlsruhe and into Baden-Baden, and a taxi is the quick option if you land late. Decide which of the two you actually need, because the transfer times differ. Late arrivals can mean thin public transport, so look at the timetable before you commit to an evening flight. If you are heading deeper into the Black Forest, allow time for the onward train.

Currency

EUR (€)

Power sockets

Type C, F · 230 V

Language

German

Emergency number

112, 110

Driving side

right

Calling code

+49

Internet domain

.de

EU / Schengen

EU member, Schengen area

Population of Karlsruhe/Baden-Baden

309 k (2025)

Time zone

UTC+01 (Europe/Berlin)

Country facts: Wikidata

• Check whether you are flying from Heathrow, Gatwick, City, Luton or Stansted, because London's airports are far apart and a transfer between them eats a day.
• Confirm what your low-cost fare includes, since a cabin bag and a checked bag are usually paid extras.
• If your trip is built from two separate tickets, leave a long gap between flights, because a missed connection is yours to fix.
• Carry your passport or national identity card and check the entry rules for Germany before you fly.
• Book early if you want September, and avoid the school holiday weeks if your dates are flexible.
• Decide whether you need Karlsruhe or Baden-Baden before you book the arrival transfer.