Daedo Capital International Airport

Daedo Capital International Airport (: DCX, : DCIA), formerly referred to as the Shin Daedo International Airport (Zhenian: 신대도국제공항) or Daedo Seongjo International Airport (Zhenian: 대도성조국제공항), is the primary  of Daedo. Located in the southwestern edge of the Seoan-gu District of Daedo, it is situated about 42 kilometers away from the city center and around 26 kilometres from Shin Daedo New Town. Named after Emperor Seongjo, the first Emperor of the Empire of Zhenia, it is the largest airport in Zhenia, as well as one of the busiest airports in the world.

Currently serving the metropolitan area around the nation's capital as well as parts of Chungmu Province, Daedo Capital International Airport was built to replace the overcrowded Jinpo International Airport in northwestern Daedo. Since its opening on May 1, 1997, the two airports are set to operate in tandem as international hubs, although most commercial flights have relocated to the new airport upon its opening: the pre-existing Jinpo Airport has since then shifted its priority to hosting non-flag carriers and domestic flights. As the city's primary international hub, the airport has initiated a three-phase expansion plan to increase its capacity: Terminal 2, the most recent addition to the airport, has opened on April 1, 2018.

Today, Daedo Capital International Airport is the single largest and busiest airport in the nation, serving over 117 million passengers and processing over 1 million tonnes of cargo in 2019 alone. It ranks first among the nation's airports for international traffic, with over 46 million international passengers, including transfer passengers, using the airport in 2019. Its significance has also made it the and  for more airlines than any other airport in the nation, including it being the only primary hub for both Zhenian Airways and Air Zhenia. Along with Shin Jinhae International Airport, it is one of the two Zhenian airports offering direct flights to all six continents of the world as of 2020.

History
With Jinpo International Airport, located on the northwestern coastal region of Daedo Special City, reaching its designed capacity limits by 1990 as Zhenian air transport skyrocketed, proposals to build a second airport for Daedo surfaced as early as 1980, shortly after the December Revolution. The Daedo Metropolitan Government, in cooperation with the Ministry of Defense and the Ministry of Territories and Transportation, explored various alternative airport options, including sites as far as 80 km north of the city center in Chungmu Province and a site that was a part of the Gulf of Danguk at the time. Of the locations at hand, while the proposal using reclaimed land from the Gulf of Danguk to the southwest of the city was not evaluated positively in terms of environmental impact, it was seen as a positive alternative for evading concerns and acquiring the capability to operate 24/7 - both serious concerns for the exiting Jinpo International Airport. It had also been evaluated positively due to the location's relative proximity to the Shin Daedo project: of the options that were considered, it was the second-closest alternative, second only to the proposal that consisted entirely of land reclamation from the Gulf. The airport site was chosen as its current location in 1985, after which reclamation of land between the mainland and Seosong Island took place.

Construction of the new airport overall was seen as a means to increase international and domestic access to Shin Daedo New Town, resulting in plan changes towards allocating more direct connections to Shin Daedo.

The first phase of the airport, which included Terminal 1 and two accompanying runways, opened on May 1, 1997.

Rail
Daedo Capital International Airport is directly served by the Daedo Metro via Line 8, as well as both lines of the Daedo Airport Express, all of which link the airport directly to city center in varying speeds and fares.