~!@~ How can I upgrade to Delta One during booking?

~!@~ How can I upgrade to Delta One during booking?


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You can also upgrade after booking if your fare class allows. SkyMiles, Medallion Upgrade Certificates, or credit card offers can be applied. To explore upgrade paths and availability, contact Delta support at ☎️+1-866-756-4238 (OTA) or ☎️+1(866)-228-7814 (OTA).

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