Nicaragua Airways is the potential future national flag carrier of Nicaragua.
 Its main base is Augusto C. Sandino International Airport, Managua.
 It is the first time in 20 years that Nicaragua will have a national flag carrier, after Aeronica ceased operations in 1991.
 Since then, the flag carrier status was awarded to Nicaragüense de Aviación also known as NICA Airlines.
 Several airlines had tried to become the Nicaraguan flag carrier like CAAL (Central American Airlines), SANSA (Servicios Aereos Nicaraguenses S.A.) but none of these survived a year.
 Today even NICA Airlines (6Y) is registered as the national airline of Nicaragua, the only international flight it operated once (Managua to Miami) and is done under the TACA code (TA) as a full TACA Airlines flight.
Air Mauritius Limited, operating as Air Mauritius, is the flag carrier airline of Mauritius.
 The airline is headquartered at the "Air Mauritius Centre" in Port Louis, Mauritius.
 Its main hub is Sir Seewoosagur Ramgoolam International Airport.
 The company is the fourth largest carrier in Sub-Saharan Africa, and has an important standing in the European, African, and Indian Ocean region markets; the airline won the “2011 Indian Ocean Leading Airline Prize”, making it the seventh year in a row for it to win the award.
airBaltic, legally incorporated as AS Air Baltic Corporation, is a state-owned Latvian low-cost carrier and the country's flag carrier, with its head office on the grounds of Riga International Airport in Mārupe municipality near Riga.
 Its main hub is at Riga International Airport with further bases at Tallinn Airport and Vilnius Airport.
Nội Bài International Airport (IATA: HAN, ICAO: VVNB) (Vietnamese: "Sân bay Quốc tế Nội Bài" ) in Hanoi, the capital of Vietnam, is the largest airport in Vietnam in terms of total capacity.
 It's also the second busiest airport in Vietnam after Tan Son Nhat International Airport.
 It is the main airport serving Hanoi, replacing the role of Gia Lam Airport.
 The airport consists of two passenger terminals.
 Terminal 1 serves domestic flights, and the newly-built Terminal 2 (inaugurated on 4 January 2015) serves all international flights to and from Hanoi.
 The airport is currently the main hub of the country's flag carrier Vietnam Airlines, as well as a major hub of low-cost carriers Vietjet Air and Jetstar Pacific.
Air Serbia (stylized as AirSERBIA; Serbian: Ер Србија / "Er Srbija" ) is the flag carrier of Serbia.
 The company's head office is in Belgrade, Serbia, and its main hub is Belgrade Nikola Tesla Airport.
<ref name="Belgrade Airport, with resurgent Air Serbia, challenges the hub order in Central/Southeast Europe">  </ref> In 2016, it was the fourth-largest legacy carrier in Central and Eastern Europe.
 The airline was formerly known as Jat Airways until it was renamed and commenced operations under its new name in 2013.
Biman Bangladesh Airlines (Bengali: বিমান বাংলাদেশ এয়ারলাইন্স ), partly transcribed from English into Bengali and the other way around, commonly known as Biman (Bengali: বিমান ), is the flag carrier of Bangladesh.
 Its main hub is at Shahjalal International Airport in Dhaka and it also operates flights from its secondary hubs at Shah Amanat International Airport in Chittagong and Osmani International Airport in Sylhet.
 The airline provides international passenger and cargo services to its destinations; as of 2015 , it has air service agreements with 42 countries, but flies to just 16 of them.
 The airline's headquarters, "Balaka Bhaban", is located in Kurmitola, Dhaka.
 Annual Hajj flights; transporting tourists and non-resident Bangladeshi workers and migrants; and the activities of its subsidiaries form an integral part of the airline's business.
 The carrier is currently facing stiff competition from a number of domestic Bangladeshi private airlines as well as some international carriers, which offer greater flexibility targeting Bangladesh's air transport sector which is experiencing an 8% annual growth rate, thanks to a large number of tourists and non-resident Bangladeshi travellers.
Air Ivoire was an airline headquartered in the "Immueble EECI" in Abidjan, Côte d'Ivoire.
 It was the national airline and operated scheduled regional and intercontinental services.
 Its main base was Port Bouet Airport, Abidjan.
 The airline ceased operations in 2011.
Air Côte d'Ivoire is the flag carrier of Ivory Coast, based in Abidjan.
 The company succeeded the country's former flag carrier Air Ivoire, which went bankrupt in 2011.
 It started operations on 12   2012 (2012--) .
British Airways (BA) is the flag carrier airline of the United Kingdom.
 It is the largest airline in the UK based on fleet size, international flights and international destinations.
 British Airways was considered the largest UK airline by passenger numbers from its creation in 1974 until 2008, when it was displaced by low-cost rival EasyJet.
 Since its inception, British Airways has been centred at its main hub at London Heathrow Airport, with a second major hub at London Gatwick Airport.
Port Bouet Airport (IATA: ABJ, ICAO: DIAP) , also known as Félix-Houphouët-Boigny International Airport, is located 16 km south east of Abidjan, Côte d'Ivoire.
 It is the largest airport in the country for air traffic.
 The airport is the main hub of the national airline Air Côte d'Ivoire.
 The Félix Houphouët-Boigny airport is connected to Europe — primarily via Air France, which offers ten weekly flights and seasonal A380 service, and also Brussels Airlines — and to the rest of Africa and the Middle East.
 Usually, the airport is served by over 20 airlines, covering more than 35 destinations.

Question: Port Bouet Airport is the main hub of the flag carrier based in what city?
Answer: Abidjan