Korean Air and Delta Connect Baggage Transfers Across Seattle and Los Angeles

Korean Air and Delta Air Lines have widened their Seamless Baggage Transfer service to two more US gateways, giving travelers a smoother path through customs and onto connecting flights. The expansion brings Seattle-Tacoma International Airport (SEA) and Los Angeles International Airport (LAX) into a program that already covers several joint venture hubs.

If you have ever sprinted across a terminal with a customs declaration in one hand and a boarding pass in the other, this change matters. The service lets you check your bags from your origin airport straight through to your final destination, even when your itinerary crosses an international border and involves a carrier switch between Korean Air and Delta.

What the service actually does

Under standard international transit rules in the United States, arriving passengers must collect their checked bags, clear customs, and then recheck them for their onward domestic flight. The Seamless Baggage Transfer program changes that for eligible Korean Air and Delta customers. Once you clear US Customs and Border Protection with your bags, you can drop them at a dedicated transfer belt instead of hauling them to another terminal or counter.

The program now operates at Atlanta (ATL), Detroit (DTW), Minneapolis-Saint Paul (MSP), Seattle (SEA), and Los Angeles (LAX). Atlanta, Detroit, and Minneapolis-Saint Paul were the original participating airports when the service launched.

Why Seattle and Los Angeles

Seattle and Los Angeles sit among the busiest gateways between North America and Asia. Both airports handle large volumes of connecting traffic for the SkyTeam alliance and the Delta and Korean Air joint venture, which launched in 2018. For travelers heading from Seoul Incheon (ICN) to onward US destinations such as Salt Lake City, Las Vegas, or San Diego, the Los Angeles expansion shortens what has often been the most stressful segment of a long trip.

Seattle plays a similar role for travelers connecting to Delta's growing West Coast network and onward flights into Alaska, the Mountain West, and the eastern United States.

Korean Air and Delta operations at SEA and LAX

The two carriers operate daily widebody service between Seoul Incheon and both West Coast hubs. Schedules below reflect published timetables as of 2025. Times are local to each airport. Confirm exact details with the airlines before you travel.

How the joint venture has evolved

Korean Air and Delta launched their joint venture in May 2018, combining networks across the trans-Pacific. The arrangement allows the two carriers to coordinate schedules, share revenue, and align frequent flyer benefits on routes between the Americas and Asia. SkyMiles members earn and redeem on Korean Air flights, and Korean Air SKYPASS members do the same on Delta.

The Seamless Baggage Transfer program is one of the more visible operational benefits for everyday travelers. Earlier expansions to Atlanta, Detroit, and Minneapolis-Saint Paul focused on Delta's largest connecting hubs. Adding Seattle and Los Angeles extends that convenience to the carriers' two key Pacific gateways.

How to use it on your next trip

If your itinerary combines Korean Air and Delta on a single ticket, the program applies automatically when you check in at your origin airport. Tell the check-in agent your final destination so your bags receive the correct routing tags. When you arrive in the United States, follow signs for customs, claim your bags, present them for inspection, then drop them at the dedicated transfer belt before clearing security for your domestic flight.

The service does not eliminate the customs step itself, which remains a federal requirement for all arriving international passengers. It does cut out the longest portion of the re-check process, which often involves walking to a separate terminal or counter.

What to watch for

Travelers should still plan generous connection times at Los Angeles and Seattle. Both airports have known customs queues during peak afternoon arrival banks from Asia, and inter-terminal transfers at LAX can take significant time even without checked bags. Korean Air operates from Tom Bradley International Terminal at LAX, while Delta operates from Terminals 2 and 3. At Seattle, both carriers use the main terminal complex, which simplifies the transfer process.

For frequent travelers between the United States and Asia, the expansion is a practical improvement. It will not change your flight time or your fare, but it removes one of the more frustrating parts of an already long journey.