The distance from London to Trieste is around 750 miles so a flight between these two locations will take a little over 2 hours. Flights are available every day with companies such as Ryan Air and they will depart from either Stansted, Heathrow or London City. The best place to find a deal on flights between London and Trieste is on the internet. Most flights between London and Trieste will include a stop over at one other European city en route. This will usually be an Italian city and based on the operator you choose to fly with, it will either be Rome, Milan or Naples. Depending on where you stop and who you fly with, a stop over can add up to half a day to overall travel time. London airports are most easily accessed by taxi ride, however buses and trains run from central London to the airports on a regular basis. Once you are in Trieste, a taxi from the airport to the city will cost around 12 Euros.