Need to fly to various cities in Asia in low season (in most of the destinations) consider this budget option based on a Star Alliance member Air China. Return flights from London are starting at £281 (€321) incl. all taxes and checked bag. Air China conveniently offers free hotel during layover in Beijing. More details here. Look for flights to Philippines (Manila, Thailand (Bangkok, Chiang Mai, Phuket). Malaysia (Kuala Lumpur, Vietnam (Ho Chi Minh City), Singapore.Myanmar (Yangon), Indonesia (Jakarta). Taiwan or Hong Kong. You can also book multi-stop in Beijing on your way for additional £281.
Travel dates are then from 11th of April to 14th of June 2018. Based on date of your outbound flight from the UK to Asia. Current Air China promo sale is running till end of December. In most of the cases max stay is 3 months. Below you can refer to our booking sample on each of the routes. Need an accommodation in South East Asia you can use Booking.com, Hotels.com. You can easily compare all available travel dates to the destination you need directly at Air China.
Booking sample of Air China cheap return flights London to Asia from £281! In this case you would fly from the UK to Manila on 12th of May. Your return flight from South East Asia back to London would be then on Saturday, 26th of May 2018.