Chaos continued to reign at Heathrow's Terminal 5 this morning as long queues built up and more flights were set to be cancelled after yesterday's disastrous opening day.
Baggage check-ins at the flagship £4.3billion facility were re-opened but arguments broke out between passengers who started queuing as early as 4am.
But many have already missed their flights with some blaming a lack of desks open to cope with the number of people and the wrong information given out.
British Airways said today that they had drafted in extra staff and had held meetings through the night to try and ease the problems that wrecked what should have been a landmark day yesterday.
Ten flights were cancelled before 8am today including those to Edinburgh, Glasgow and Aberdeen. BA were forced to scrap 34 flights yesterday.
Many passengers were left stranded overnight with some finding hotels, but others forced to sleep on benches of the terminal floor.
Passengers hoping to fly out today began arriving early but were met with frustration.
Tony Pascoe, 35, from Witney, Oxfordshire, said he arrived just after 4am with his mother Ann for a holiday to Vienna - her first ever flight. He said: "None of the desks were open and we were told to stand in a queue. After standing there for God knows how long they opened one and people who had just walked into the terminal began jumping in. It was chaotic.
"Everyone who had been queuing were annoyed and a lot of jostling and arguing started. Then the desk just crashed so everyone was stood there.
"Our flight was due to leave at 6.45am so I stood in one queue and my mum in another. Eventually they told us we weren't going to get on.
"I feel like just giving up and going home but my mum is keen to fly because it is her first ever trip. There were lots of other people in the same situation and we all seemed to be getting the wrong information.
"It is diabolical. I am a frequent traveller and this is the worst experience ever - it is absolutely shocking."
A spokesman said they hoped that 80% of flights would take off but some cancellations would be inevitable.