Another interesting suggestion based on promotional sale of Air China to countries of South East Asia during main tourist season 2015/2016. You may now consider to book an open jaw tickets from Europe to Cambodia for very reasonable fare! Explore incredible ancient temples near Siem Reap (Angkor Wat or Bayon Temple on top of them) or go south to Sihanoukville and spend some great time on Cambodian sandy beaches. On the other hand you may also visit "Killing fields" or S-21 prison in Phnom Penh to learn something about Cambodian history during the tyranny of Red Khmers (between 1975 - 1979).
The cheapest open jaw flights to Cambodia are available when departing either from Spain (Madrid, Barcelona) or Lisbon. Your return flight has to be then to London, Paris or Germany (Frankfurt, Munich, Dusseldorf). Currently you may book your open jaw ticket to Cambodia already for £276 or €356. If interested you may find the cheapest open jaw flights within March 2016. Below you may find the booking samples. We recommend to use Skyscanner to quickly find out the cheapest connection flight from your home city. Cambodia is also one of the countries on our list of Top exotic destinations you can afford.
Booking samples
Accommodation
As per above booking sample you may also consider to book stop-over in China (Shanghai) on your return flight and take the advantage of free 72h visa you can get upon arrival in China.
Booking sample of an open jaw flight from Europe to Cambodia for £276 here. In this case you would be flying from Barcelona to Siem Reap on 29th of February 2016 and returning back from Cambodia to London on 26th of March 2016. (with longer layover in Beijing).