British Airways:

British Airways serve six major continents and is a flag carrier airline of the United Kingdom. Its main hub is at London Heathrow Airport and is the largest airline in the UK with large fleets, international flights and destinations. British Airways also have a great presence at Gatwick airport and London City airport. It serves nearly 145 destinations and six domestic places delta complaints.

Turkish Airlines:

Turkish Airlines is the national flag carrier airline of Turkey and its main hub is in Istanbul Ataturk airport. It serves 234 airports in Europe, Asia, Africa and America. THY serves 197 international and 37 domestic airports. Esenboga International Airport, Antalya International Airport, Sabiha Gokcen International Airport and Adnan Menderes airport are its secondary hubs. Turkish Airlines serve London Heathrow Airport, Stansted and Luton Airport.

Emirates:

Emirates is a Dubai based airline and is also known as the United Arab Emirates. It is a subsidiary of The Emirates Group, which is owned by the Investment Corporation of Dubai. This largest airline of The Middle East operates 3000 flights every week to more than 130 cities. Emirates operate non stop commercial flights from Dubai to Los Angeles, Dallas/Fort Worth, Houston and San Francisco. It also provides services to London Heathrow and Gatwick Airport.

Singapore Airlines:

Singapore Airlines Limited is the flag carrier of Singapore and operates a hub at Changi airport. This five star airline of Singapore has a strong presence in Southeast Asia, East Asia and South Asia. It operates two non stop commercial flights from Singapore to Newark and Los Angeles. It operates flights to 62 destinations across six continents and serves flights to London Heathrow.