Points to be Made says that China Airlines – a member of Skyteam and thus partner of Delta – is offering status matches.
As usual, you will need to provide details of the airline and programme you are matching from, your account number and a screenshot of your activity page. To initiate the process, send an email to email@example.com who should match your status for one year..
China Airlines’ Emerald status, that they appear to be matching to at least for Star Alliance Gold members but presumably for oneworld Emeralds as well, is “Skyteam Elite Plus” which gets priority check-in, boarding, and baggage handling as well as lounge access when flying internationally. (Unlike top tier status with oneworld or Star Alliance with an airline outside the U.S., you do not get lounge access on a purely domestic itinerary.) Delta /also gives you a free checked bag (or extra checked bag when you’re otherwise entitled to fee-free baggage).
Here’s my discussion of airline status matches. I’ve written about past Air France status match offers here and here, and about Skyteam member Aerolineas Argentias offering status matches a year ago as well.
If you fly Delta, don’t yet have status, but want some benefits you could get a status match and get your benefits and still accrue points with Skymiles (perhaps you live in Atlanta or the Upper Midwest and would want to do so).
You’d enter your Skyteam elite frequent flyer number when you book the tickets or at least prior to check-in. Use the number when you check-in for the baggage benefits, and even print your boarding pass to show the status (and thus take advantage of priority boarding more easily than having to show your membership card).
Then once you’ve checked in, have an agent change your frequent flyer number over to Delta or whatever airline you’re crediting to. Get a new boarding pass in case the flight doesn’t post to your Delta account automatically and you need to submit for credit later (it will be much easier to get if you have a boarding pass showing your Delta number on it — rather than one that showed another airline’s number!).
After the flight if it’s a roundtrip, add your Skyteam elite number again to take advantage of benefits on the return. Rinse, repeat.