Following approval being granted to their new joint-venture agreement earlier this month, Korean Air and Delta have announced that they will be expanding their codesharing agreement to now include all flights between Seoul (Incheon) and Seattle.
The addition of the Seoul-Seattle route means that the two airlines now offer 16 peak-day codeshare flights between the South Korean capital and the US.
Both carriers fly non-stop between the two cities once per day, with Delta operating the DL198/DL199 flights and Korean Air operating flights KL19/KL20.
Korean Air’s schedule between Seoul and Seattle:
| Flight No. | From | To | Departs | Arrives | Days | Aircraft |
| KE20/DL9011 | Seattle (SEA) | Seoul (ICN) | 1415 | 1745+1 | Daily | B777-300ER |
| KE19/DL9010 | Seoul (ICN) | Seattle (SEA) | 1820 | 1220 |
Delta’s schedule between Seoul and Seattle:
| Flight No. | From | To | Departs | Arrives | Days | Aircraft |
| DL199/KE5020 | Seattle (SEA) | Seoul (ICN) | 1150 | 1545+1 | Daily | B767-300ER |
| DL198/KE5019 | Seoul (ICN) | Seattle (SEA) | 1920 | 1350 |
From Seoul, travellers can connect to Korean Air flights to 18 major cities in Asia, notably Singapore, Osaka, Nagoya and Bangkok, while from Seattle they can connect to Delta-operated flights to 44 US cities, such as Phoenix, Denver and San Jose.
So, which carrier should travellers opt for on this route?
Korean Air flies its Boeing 777-300ER to Seattle, which notably features its first class Kosmo Suites. Depending on the overall configuration of the aircraft, these seats offer 24 or 26.5 inches of width, as well as 83 inches of pitch as well as 24 inches of width. Delta, meanwhile, flies its B767-300ER, which has no first class cabin.