One more option with current sale of 4* Oman Air from Europe to various destinations in Asia. This time you may find very limited travel options in June 2016 to fly from London to Bangkok already for £273 return! For a slightly higher fare you may consider to fly to Kuala Lumpur, Sri Lanka, Nepal, Philippines or Singapore. All charges and fees are included in base fare as well as checked luggage up to 30kgs.
As mentione very limited travel dates are available mainly in June 2016 so hurry up if you are flexible enough and you are looking for some reasonable solution to one of below destinations. Booking is available directly with Oman Air where you may also easily track the cheapest options from London to Asia.
Booking samples (when booking your flight for two travellers)
Booking sample of cheap flights form London to various destinations in Asia from £273 return! In this case you would depart from UK to Bangkok on 10th of June. Your return flight from Thailand back to London would be on 25th of June 2016.