Fare Class M or more commonly known as Main Cabin (M) is a revenue fare/booking class of service on Delta Air Lines. The M fare class is one the highest (most expensive) fare classes in the Main Cabin and tickets are considered full fare. This fare class is eligible for complimentary upgrades for SkyMiles members who hold Medallion status.
Fare Class M is marketed as a Discount Main Cabin fare class, but is considered an upper-tier fare class with 8 lower fare classes and 2 higher fare classes, which means the flight you are booking is nearly capacity and few seats remain unsold. Tickets in this fare class will be expensive. To book a cheaper fare class, adjust your routing or dates.
Below is a human-readable description of this fare class and the expectations passengers should have when flying with a M fare class.
Fare Class M booking information
Important information to know when booking Fare Class M on Delta Air Lines.
Fare Class M upgrade eligibility
Important upgrade eligibility and upgrade order information with a Fare Class M ticket on Delta Air Lines.
Complimentary upgrades
Fare class M is a top-tier fare class (2 higher fare classes out of 11 total Main Cabin fare classes), which puts you close to the beginning of the upgrade list for your Medallion tier. Higher medallion tiers, higher fare classes and PM/DM’s who have applied a RUC and GUC will be higher on the upgrade list than this fare class.
Complimentary upgrades are available for SkyMiles Silver, Gold, Platinum and Diamond Medallion members. Complimentary upgrades clear based on the official upgrade priority list here.
If you don’t know, now you know…
Complimentary upgrades are based upon availability and are affected by Irregular Operations (IROPS) and gate agents not following operational guidelines to upgrade SkyMiles Medallion members with seats available. Your mileage may vary.
SkyMiles Medallion frequent flyer earnings
Important Medallion earning information on a Fare Class M ticket on Delta Air Lines.