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The flight ban will remain across most of England until at least Wednesday, air traffic control body Nats said.It hoped to resume flights but further concerns meant restrictions were extended until 0100 BST on Wednesday.
A new ash cloud from the volcano eruption in Iceland spread over the UK, leading to concerns it posed a threat for aircraft.
Newcastle Airport is operating some flights and its airspace will remain open until 0100 BST on Wednesday.
But there will be no flights until at least 0100 BST for the rest of England.
Aberdeen flight
There is concern tiny particles in the ash cloud could clog aircraft engines.
Nats said: "We will continue to monitor Met Office information and the situation is likely to change during the course of the day."
It had hoped to be able to allow flights to resume on Tuesday, but further volcanic activity has meant only a few flights can operate from northern England and Scotland.
The situation is due to be reviewed again at 2100 BST.
Newcastle Airport reopened at 0700 BST, allowing a few flights to land and leave. A flight from Aberdeen landed at the airport at 0939 BST and a return service took off at about 1200 BST.
A Jet2.com plane left Newcastle at 1100 BST on a rescue mission to pick up 229 stranded passengers in Sharm el Sheikh, Egypt.
British Airways said 12 long-haul flights were currently en route to Heathrow, from Beijing, Singapore and the west coast of the US.
A spokeswoman said they had contingency plans for each flight if Heathrow was still closed.
Ferry company Norfolkline was carrying 49-seat coaches for foot passengers on some of its Dover-Dunkirk crossings for a second day.
Coaches will be used again on Wednesday.
Some schools in England have been forced to close as teachers and pupils remain stranded abroad.
A union is fighting moves to dock the pay of Devon teachers who are unable to attend school because of the flight ban.
Devon County Council warned pay could be docked, although added it was reviewing the policy "in light of the extreme circumstances".
Elsewhere, a mother of a soldier killed in Afghanistan is unable to get to the inquest of her son due to the flight ban.
Lorraine McClure is in Gran Canaria and is desperate to get to Trowbridge, Wiltshire, where the inquest is resuming into the death of Pte Aaron McClure. Pte McClure and two other British soldiers were killed by a 500lb (227kg) bomb dropped by a US aircraft.
Mrs McClure's solicitor appealed for help to get her back as soon as possible.
British troops stranded in Spain are being taken home by warship HMS Albion.
The Plymouth-based ship is bringing home more than 450 service personnel who were on their way back from Afghanistan, the MoD said.
"Also on board are around 280 British civilians at the request of the Foreign Office as part of the government's overall response to the crisis," an MoD spokesman said.
Two other Royal Navy ships are on standby for similar rescue missions.
Meanwhile, Charlotte Kerr from Spennymoor, County Durham and her fiance Mark were due to get married at Disneyworld in Florida on Wednesday, but their flight was grounded on 16 April.
The couple hope they will be able to make the trip in May or June.
Foreign visitors stranded in the UK are being offered free entry to National Trust sites if they show their passport and a flight ticket to prove they are stuck due to the flight ban.
A Foreign and Commonwealth Office 24-hour consular helpline has been set up on 020 7008 0000 for people stuck abroad.This article is from the BBC News website. ? British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.