Six top destinations

Sydney: £559
Emirates from Heathrow, Manchester and Birmingham via Dubai. Must be booked by September 25. Valid for departures from London from April 1 - June 30. Minimum stay seven days, maximum six months. All travel must be completed by November 30. Trailfinders (020-7938 3939).

Hong Kong: £389
KLM from Heathrow via Amsterdam into Hong Kong. Must be booked by September 25. Valid for departures September 15 - October 30. Minimum stay one Saturday night, maximum one month. Bridge the World (0870 44474747).

Paris: £74
British Airways from Gatwick. Valid for departures until March 21. Minimum stay one Saturday night, maximum two months. Thomas Cook Flights Direct (0870 7520066).

Amsterdam: £80
British Airways from Manchester, Heathrow or Gatwick. Valid for departures indefinitely. Minimum stay one Saturday night, maximum two months. British Airways (0845 7733377).

Rome: £109
Alitalia from Heathrow or Gatwick. Must be booked by October 1 and purchased at least seven days before departure. Valid for outbound departures October 1-December 18. Minimum stay one Saturday night, maximum one month. Alitalia (0870 5448259).

Barcelona: £131
Iberia from Heathrow. Valid for departures until December 31. Full payment required when booking. Minimum stay one Saturday night, maximum two months. Airline Network (0800 727747).

The pick of the rest

Venice/ Bologna: £99
Alitalia from Heathrow or Gatwick. Must be booked by October 1 and purchased at least seven days before departure. Valid for outbound departures October 1 -December 18. Minimum stay one Saturday night, maximum one month. Alitalia (0870 5448259).

Mexico City: £401
KLM from Heathrow, London City, Birmingham, Edinburgh, Glasgow, Manchester, Newcastle, Cardiff, Teesside, Stansted Bristol, Aberdeen, Humberside or Norwich via Amsterdam. Valid for departures October - December 14, then January 11 - March 15. Minimum stay one Saturday night, maximum one month. Journey Latin America (020-8747 3108).

Perth: £516
Royal Brunei from Heathrow via Brunei. Book by September 30. Valid for departures September 21 - November 26. Minimum stay three days. Travel must be completed by November 30. Trailfinders (020-7938 3939).

Munich: £66.50
NMI British Midland from Stansted. Must be bought at least seven days before departure. Minimum stay one Saturday night, maximum one month. BMI British Midland (0870 6070555).

And the rail alternative

Paris/Brussels: £79. Lille £69
Eurostar from Waterloo. Must be bought at least 14 days before departure. Minimum stay one Saturday night or two other nights. Eurostar (08705 186186).

NB Fares can change rapidly. These were available in reasonable quantities at the time of writing, but they can sell out in a sudden rush.