You've travelled to the airport, checked in and go to look at the departures board - FLIGHT DELAYED!
No traveller wants to see this next to the flight they have booked, but of course it's probably happened to most of us at one time.
With the holiday season just around the corner, here are some of the worst flights for long delays if you're flying from Heathrow Airport.
The route from hell is Heathrow to Algeria where passengers have a one in four chance of facing a delay of at least one hour at the airport, according to exclusive analysis by the Trinity Mirror data unit team based on official delay data published by the Civil Aviation Authority (CAA).
Some 38 of the 160 Heathrow-Algeria flights in 2015 have been delayed for between one and three hours, while a further five have been delayed for more than three hours.
That makes a total of 26.9 per cent of flights delayed for at least an hour.
Top five routes from hell from the west London airport.
Heathrow to Turkmenistan (26.1%)
Heathrow to Tunisia (23.2%)
Heathrow to Ghana (20.6%)
Heathrow to Bangladesh (15.2%)
At the other end of the scale, none of the 71 Heathrow to Madeira flights were delayed by more than an hour.
Read More: The top 10 airlines which operate at reduced noise levels when landing at Heathrow Airport in west London
Making up the bottom five routes with the least delays were Heathrow to New Zealand; Heathrow to Colombia; Heathrow to Bahrain and Heathrow to Spain (Canary Islands).
The CAA data covers a total of 634,097 flights from January to August this year, from UK airports to destination countries around the world.
