(Reuters) - Large parts of Europe enforced no-fly rulings for a fourth day on Sunday because of a huge ash cloud from an Icelandic volcano that has caused the worst air travel chaos since the September 11 attacks.
Here is a list of countries as of 7 a.m. EDT (1100 GMT) on Sunday and their airspace status:
AUSTRIA - Airspace expected to remain closed until at least 8 p.m. EDT (2400 GMT) Sunday.
BELGIUM - Airspace closed until at least 8 a.m. EDT (1200 GMT) Sunday. Main airline, Brussels Airlines, has canceled all flights until Monday.
BRITAIN - Airspace closed until at least 8 p.m. EDT (2400 GMT) Sunday.
BULGARIA - Airspace closed as of 2 a.m. EDT (0600 GMT) Sunday.
CZECH REPUBLIC - Airspace closed until at least 6 a.m. EDT (1000 GMT) Monday.
DENMARK - Airspace closed until at least 8 p.m. EDT (2400 GMT) Sunday.
ESTONIA - Airspace closed until Monday
FINLAND - Airspace closed until at least 11 a.m. EDT (1500 GMT) Monday.
FRANCE - The last airports still operating in the south, such as Toulouse, Montpellier and Biarritz will close from 8 a.m. EDT (1200 GMT). From then all French airports will be shut until at least 0600 GMT Monday.
GERMANY - German airspace shut until at least 2 p.m. EDT (1800 GMT) Sunday.
HUNGARY - Airspace to remain closed until at least 6 p.m. EDT (1000 GMT) Monday, although some flights at the discretion of traffic control may be allowed to take off or land.
IRELAND - Airspace closed until at least 8 p.m. EDT (1200 GMT) on Monday. Ryanair, Europe's largest low-cost carrier has canceled all flights to and from northern Europe until 1200 GMT Monday.
ITALY - Northern airspace closed until at least 2 a.m. EDT (0600 GMT) Monday.
LATVIA - Airspace expected to stay closed until Monday.
LITHUANIA - Airspace closed indefinitely according to Vilnius airport. However, Vilnius airport also says on its web site that arrivals from Moscow 12:40 (UTair Aviation), Prague 14:05 (Czech Airlines) and Riga 18:05 (AirBaltic) are still expected in Vilnius today.
LUXEMBOURG - Luxembourg airport closed until at least 12 p.m. EDT (1600 GMT) Sunday.
NORWAY - Air space opened for limited traffic in some areas north of Kristiansand. Main airports in southern Norway such as Oslo Airport Gardermoen, Stavanger and Bergen are closed.
POLAND - Airspace closed since Friday, partial reopening possible on Sunday.
ROMANIA - Airspace closed until at least 5 a.m. EDT (0900 GMT) Monday.
RUSSIA - All airports open. Aeroflot is flying to the United States via the North Pole.
SLOVAKIA - Airspace closed as of 11 a.m. EDT (1300 GMT) on Friday.
SPAIN - Madrid airport open, but carrier Iberia cancels all its European flights except those to or from Portugal, southern Italy, Greece and Turkey.
Northern Spanish airports, including Barcelona closed until at least 10 a.m. EDT (1400 GMT) Sunday. Palma shut from 4 a.m. EDT (1000 GMT) until at least 2 p.m. EDT (1800 GMT).
SWEDEN - Airspace closed all Sunday and into Monday. Scandinavian Airlines said no SAS flights would operate to, from or within Denmark, Norway and Sweden April 17 or 18.
A corridor of airspace in northern Sweden is open around Kiruna as is as a corridor to the Norwegian Sea.
SWITZERLAND - Airspace closed until at least 8 a.m. EDT (1200 GMT) Monday.
UKRAINE - Kiev's Borispol airport open.
Compiled by London World Desk