Delta Adds Seoul Flights to Time-Saving Program for International Passengers

Atlanta-bound travelers, it’s time to get excited. At the end of July, the arrival process from an international flight got much smoother if you were arriving in Atlanta from London.

In cooperation with government authorities and security processes, passengers from Seoul with a connecting flight in Atlanta are now eligible for a much shorter process getting from their first flight to the second. This is thanks to the expanded One Stop Security program.

Here’s how it works and who is eligible.

What Is One Stop Security?

One Stop Security is a joint initiative between the U.S. government and its counterparts in the U.K. and South Korea, including security agencies like the TSA and U.S. Customs and Border Protection. Under this program, passengers departing from London Heathrow (LHR) and Seoul Incheon (ICN) and arriving at select U.S. airports can use a new, streamlined arrivals process before their connecting flights.

Passengers with connecting flights typically need to go through passport control, claim their checked luggage, and pass through customs at their first point of arrival in the U.S. Then, they give their luggage back to the airline and go through security to get to their next flight. It can be exhausting and time-consuming.

One Stop Security, in contrast, allows some passengers to avoid all of this. They can clear passport control and customs plane-side (London passengers only), and the airline will transfer their luggage to the next flight (both London and Seoul passengers). Then, they can head to their next gate sooner.

Who Is Eligible?

Unfortunately, not all passengers are eligible for Delta‘s new One Stop Security program. It’s only available to passengers departing London Heathrow (LHR) or Seoul Incheon (ICN) and who are arriving in Atlanta (ATL) before a connecting flight on the same itinerary.

If you’re on an eligible flight, you can use One Stop Security if you have either Global Entry or the Mobile Passport app (iOS, Android).

One Stop Security is complimentary for these passengers. Bags will be screened and then transferred to their connecting flights for both London and Seoul passengers. Additionally, passengers from London will save considerable time and effort by heading directly into the terminal, rather than going downstairs to the arrivals hall.

Delta has been offering One Stop Security in the opposite direction — out of Atlanta for passengers connecting through London Heathrow — since February 2025. It became available for Delta passengers arriving in the U.S. for the first time on July 30, 2025, for passengers departing London. Delta announced an expansion to include Seoul departures on August 13, 2025.

Final Thoughts

Arriving in the U.S. typically comes with the headache of claiming luggage, dropping it off again, passport control, customs, going upstairs to security again for your next flight … it’s cumbersome.

One Stop Security will eliminate some of those headaches for eligible passengers who have a connecting flight. We were excited when Delta started offering this for passengers out of London, hoping it would expand. Now, it has done just that, including passengers out of Seoul. We hope the expansions will continue at a quick pace.