Many airlines fly out of London Heathrow Airport, so it is impossible to list all of them, but major airlines that fly out of Heathrow include British Airways, Lufthansa, SAS Scandinavian Airlines, American Airlines, TAP Portugal, Qatar Airways, Qantas, Singapore Airlines, Aegean Airlines, Air New Zealand, South African Airways, KLM and many more.
The airlines that fly from New York to Luton Airport in London are American Airlines and United Airlines. These can be booked on Expedia.com.
Nairobi Airlines
Qatar Airlines via Doha
American Airlines, United Airlines
British Airways, Finnair, Scandinavian Airlines,
what are weight retrictions for Iberai airlines flying from London Heathrow to Madrid and on to Marrakech.
The United Airlines phone number in London is 0845 8444 777 according to the London Information web-site (see related link)
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United Airlines USA to London flight reservation +1(888) 897-4629 Toll-Free
This list may not be complete, but these airlines fly non-stop from Hethrow in London to Venice, Italy: Alitalia, KLM Royal Dutch Airlines, Swiss International Air Lines, Czech Airlines, Lufthansa, Air France, BMI.
US Airways, Delta Air Lines, American Airlines, Air France
Flights to Almeria can be taken from Manchester, London, as well as Birmingham. The airlines currently flying to Almeria include Thomas Cook Airlines and Monarch Airlines.