Delta Fare Class MFare class M is a revenue fare/booking class of service that is marketed as Main Cabin on Delta Air Lines mainline and code share flights.
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Basic Economy tickets are the most restrictive ticket option Delta has — there are no changes allowed on these trips under any circumstance. Main Cabin tickets now have no change fee where you can change your ticket's destination, routing, or more for the cost of any fare difference.
Free checked bags for Delta Medallion membersOne free checked bag within the U.S. and Canada. One free checked bag in addition to the standard allowance on international flights.