There are a reasonably large number of airlines that fly from London - Sydney, these include: Qantas, British Airways, Emirates and Virgin Atlantic. The flight time is 21 to 23 hours. The best flight options can be compared with our online flight comparison tool which will sift through online flight promotions to find the London - Sydney flight offer that suits you the best. Flights to Sydney are available from Heathrow or Gatwick airports, both of which are easily accessible from London by train for £10 - £20, or by bus for £2 - £8. You can also travel to Heathrow on the London Underground. A taxi from London Heathrow to the centre of the capital, depending on where exactly you are going, will typically cost you between £40 and £80. You need to check in for your flight at least three hours in advance. Sydney is only a 13 minute train journey from the airport. Trains run about every ten minutes. You can also travel by bus, but you may have to pre-book. The single train fare is $15.90 (about £10), while buses cost $12 - $15 (£7.60 - £9.50). Many hotels offer a complimentary shuttle service. A taxi to the city costs about $50 (£31.50).