We booked a flight via Travelocity for my stepson to return home to Vietnam in October 2019. He will travel from MCI to SEA and then another Delta flight from SEA to ICN and finally from ICN to SGN on a Delta flight operated by Korean Air. Will he be able to check his luggage all the way through to his final destination in Ho Chi Minh City or will he have to retrieve his luggage in Seattle or Seoul and recheck through customs?

  • On the way there no, but yes on the way back. The first airport in the US will make you collect luggage before clearing customs. The airlines then collect the bags again right after clearing customs. If your return is just the reverse routing then this will happen in Seattle.
    – Adam
    Jun 23, 2019 at 0:12

1 Answer 1


Generally, if it's all a single booking you can expect baggage to be checked through so you won't see it at layover point (except in some cases of international-to-domestic transfers, but there are none in the itinerary you describe).

Some ticket resellers will sometimes issue tickets spread over several bookings at the airline level even of you buy them at the same time from their website. This practice is generally considered rather dodgy unless the passenger is told exactly what is going on (because it also influences you rights in case you're delayed and miss a connecting flight), and I don't think Travelocity is one of them. If in doubt, look for small print that warns about connections not being guaranteed, or being "guaranteed" by someone who is not the airline.

In your case, it looks very likely that it is all a single booking -- especially the fact that the last leg is booked as a Delta codeshare rather than under its Korean Air flight number. There would be little reason to do that except to keep the entire itinerary on a single Delta ticket.

  • 2
    Note that there is an exception which would apply on the way back: all passengers arriving in the US need to reclaim luggage and go through customs at their port of entry (which would be SEA for an exact reverse routing). But not in the direction stated in the question.
    – jcaron
    Jun 22, 2019 at 20:06

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