Flying from London
Wizz Air have great value flights to Split and Dubrovnik from London Luton airport.
Easy Jet, Jet2, and Ryan Air have also have low cost flights into Zadar and Rijeka from London Stansted.
Rijeka to Split is approx 8 hours and Zadar to Split 3 hours by bus, both services are very regular and the drive drive down the Adriatic coast is stunning.
RYANAIR: Ex Zadar
In June the flights are from £21.99 One Way.
RYANAIR flights from LONDON STANSTED to ZADAR AIRPORT
- Fridays Dep 17:10, Arr 20:35
Bus: 22:45 dep Zadar, arr Split 01:35am (Saturday am) - can book night at Split Hostel / Silver Central Hostel on MyTrip or spend night in Zadar and take 07:00 bus from Zadar, arr Split 10:05 (arrival point is 30 second walk from boat dock!)
RYANAIR flights from ZADAR to LONDON STANSTED AIRPORT
- Saturdays Dep 17:20 Arr 18:40
- Sundays Dep 15:40 Arr 17:00
(bus [dep Split - arr Zadar] everyday 09:00 - 12:00, 10:00 - 13:30, 10:45 - 13:40, 11:00 - 14:24, 11:30 - 14:35, 12:00 - 15:05)
RYANAIR: Ex Rijeka
Flights from £14.99 in June One Way
RYANAIR flights from LONDON STANSTED to RIJEKA AIRPORT
- Fridays dep. at 8.00 - arr. at 11.25
Daily buses Rijeka to Split (13:30 - 21:00 or 16:15 - 22:35) with 1 night at Split Hostel / Silver Gate Hostel on MyTrip
RYANAIR flights from RIJEKA AIRPORT to LONDON STANSTED
- Mondays dep. at 15.15 - arr. at 16.35
Buses Split to Rijeka (after 2 nights accommodatyion Split Hostel / Silver Central) 05:00am - arr. 12:20pm
You can find more information about local buses in Croatia here http://www.autobusni-kolodvor.com/en/
Getting there from Europe
For those already on Busabout - Milan, Rome and Berlin all have good flight connections to Split. Check http://www.skyscanner.net for cheap flights.
There is also a ferry which departs from Ancona in Italy. More details here http://www.jadrolinja.hr or http://www.blueline-ferries.com
Busabout Eastern Europe Treks
If you have a bit more time why not take one of the Eastern Europe Treks which finish in Split.