Delta Fare Class OK

Delta Fare Class OK is a fare class used for cleared upgrade space using a RUC or GUC that is marketed as First Class or Delta One on Delta Air Lines.

Below is a human-readable description of this fare class and the expectations passengers should have when flying with a OK fare class.

Fare Class OK Information

Important information about Fare Class OK on Delta Air Lines.


Delta Air Lines (Mainline or codeshare flight)






Cleared Upgrade Space


Cleared RUC/GUC upgrade


First Class / Delta One

How expensive is Fare Class OK?

How to book Fare Class OK

Information about booking Fare Class OK on Delta Air Lines.

Fare Class OK is marketed as cleared upgrade space supported by the use of a GUC or RUC for First Class or Delta One. Typically, fare Class OK redemption fare class can be found with significant advanced booking.

  • Searching for Fare Class OV is impossible through and they have deprecated the advanced search feature which used to allow passengers to search by Fare Class. When logged in to your SkyMiles account and searching for flights, notes saying “Upgrade available with RUC/GUC” is your only indication that RV/OV/OK fare classes may be available on at least one flight.
  • It is advised to call into reservations and get a knowledgeable ticketing agent to search your destination for Fare Class OV availability. Unfortunately, getting a knowledgeable ticket agent is very hard post-COVID as the newer agents have not been trained on DL Term or any other system than their point-and-click reservations system. You will have to hang up and call again (HUCA).
  • Many frequent flyers are reporting that shows Regional or Global Upgrade Space availability; however, not for the entire route.

If you are a frequent flyer with additional insight or are with Delta seeking to clarify the information provided, please contact me.

SkyMiles earnings with Fare Class OK

What you’ll earn in the SkyMiles program flying with Fare Class OK

2024 is the start a whole new experience with the SkyMiles program. The core of how SkyMiles members earning status has drastically changed, so please bookmark this site and check back frequently.

SkyMiles medallion members will earn SkyMiles and MQDs based on the originally purchased fare class.

How to get upgraded from First Class / Delta One

A comprehensive guide to upgrading with Fare Class OK on Delta Air Lines.

Complimentary upgrades on Delta Air Lines

Upgrading to Premium Cabins (Delta Premium Select / Delta One)

  • There are no cabins of service higher than Delta One.

Official upgrade rules found on

Mileage Upgrade Awards (MUA) changes (as of 08/22/2023)

  • It is unlikely to see buy up offers or MUAs because the ticketed fare class is the highest cabin of service available, but Delta's IT has been know to do shady, illogical things like sell you a buy-up to a refundable fare in the same cabin.

Official mileage upgrade awards rules found on

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