Glossary
- MAD (Madrid Barajas)
- Mandarin Oriental (MO)
- Manufactured Spend (MS)
- Married Segment Break
- Married Segment Logic
- Marriott Bonvoy (MB)
- Mattress Run
- MCT
- MEL
- Merchant Coding
- Metal
- M Fare
- MGM Rewards
- MH (Malaysia Airlines)
- MIA (Miami International)
- Mileage Millionaire
- Mileage Miser
- Mileage Plan
- MileagePlus (MP)
- Mileage Police
- Mileage Run (MR)
- Mileage Run Routing Trick
- Miles & More
- Minimum Payment
- Minimum Spend Requirement (MSR)
- Misconnect
- Mistake Fare
- MLW
- MMB
- Money Order (MO)
- MRD
- MR (Membership Rewards)
- MS-Friendly
- MTOW
- MU (China Eastern)
- MUC (Munich)
- MX