- Longitude
- Lounge
- Low Latitudes
- Lubber Line
- Luggage
- Lugger
- Lutine Bell
- Luxurious
- Mach Number
- Mae West
- Magic Carpet
- Maglev
- Main Deck
- Maitre Dhotel
- Malabar Coast
- Malaria
- Malay Archipelago
- Malecon
- Management Fees
- Management Information System
- Manual Issue
- Manx
- Map Reference
- Mardi Gras
- Mark-Up
- Marlin Coast
- Mask Clearing
- Mast
- Mates Receipt
- Maximum Permitted Mileage
- Mayan
- Mayday
- Mdr-Tb
- Mean Sea Level
- Medical Expenses Insurance
- Mediterranean
- Meet And Greet
- Megalopolis
- Melanesia
- Member
- Merchantman
- Mesa
- Mestizo
- Meteorology
- Metro
- Metroplex
- Metropolis
- Mexic
- Mice
- Micronesia
- Middle East
- Midnight Sun
- Migration
- Mineral Water
- Minimum Connecting Time
- Minimum Rated Package
- Minimum Stay
- Minoan
- Mirage
- Miscellaneous Charges Order
- Mist
- Mistral
- Mobile Home
- Monoplane
- Monsoon
- Moraine
- More Distant Point
- Morse Code
- Motel
- Motorail
- Motorway
- Motor Boat
- Motor Ship
- Mountain
- Mouthpiece
- Mudejar
- Multi-Sector
- Multiple
- Multiplier Effect
- Mycenean
- Nadir
- Narrow-Bodied
- Narrow Boat
- Narrow Gauge
- National Park
- National Vocational Qualification (Nvq)
- Nation State
- Natural Attraction
- Nature Reserve
- Nautical Mile
- Nautre Trail
- Navigation
- Neap Tide
- Near East
- Netherlands Antilles
- Net Rate
- Net Registered Tonnage
- Neutral Buoyancy
- Neutral Unit Of Construction
- New Tourist
- Nimbostratus
- Nitrogen Narcosis
- Non-Aligned
- Non-Resident
- Non-Smoking
- Non-Stop
- Non-Transferable
- Nonref
- Normal Fare
- Norman
- North America
- North Atlantic Drift
- North Pacific Current
- Nouvelle Cuisine
- No Frills
- No Mans Land
- No Show
- Nunavut
- Occupancy Rate
- Ocean
- Oceania
- Oecd
- Off-Line Carrier
- Offload
- Olda Age Pensioner
- One-Class
- One-Way Rental
- One-Way Trip
- Onshore
- Open-Date
- Open-Jaw
- Open Skies
- Option
- Optionla Extra
- Ordnance Survey Maps
- Organiser
- Ottoman
- Outgoing
- Outrigger
- Outside Cabin
- Over-Capacity
- Overpass
- Overriding Commission
- Oyashio
- P.M.
- Pacific Rim
- Package Holiday
- Package Travel
- Padania
- Page
- Pagoda
- Pampero
- Pandemic
- Panhandle
- Paper
- Parador
- Paragliding
- Parallel
- Paramotoring
- Parascending
- Paratyphoid
- Parish
- Parkway
- Pars
- Part Charter
- Par Of Exchange
- Pass
- Passenger
- Passenger Coupon
- Passenger Mile
- Passenger Name Record
- Passenger Transport Authority
- Passover
- Passport
- Passport Control
- Patio
- Patois
- Patriality
- Payload
- Penalty Fare
- Peninsula
- Pension
- Penthouse
- Perestroika
- Perishability
- Permafrost
- Perpendicular
- Personal Accident Insurance
- Personal Liability Insurance
- Personal Money Insurance
- Personla Possessions Insurance
- Phonetic Alphabet
- Physical Feature
- Pictogram
- Pidgin
- Piece Concept
- Pier
- Pioneer Club
- Piste Groomer
- Piston Engine
- Pitch
- Plate
- Plate Tectonics
- Platform
- Plat Du Jour
- Plimsoll Line
- Ply For Hire
- Point-To-Point Air Fare
- Point Of Sale Display
- Polder
- Poles
- Pole Star
- Pollution
- Polyglot
- Polynesia
- Polynesian Civilisation
- Pool Agreement
- Port Surcharge
- Port Taxes
- Posh
- Positioning
- Post-Date
- Pourboire
- Pousada
- Powwow
- Prayer Room
- Pre-Boarding
- Pre-Existing Condition
- Precinct
- Precipitation
- Preferred Supplier
- Premium Traffic
- Prepaid Ticket Advice
- President
- Pressurised
- Price-Fixing
- Price Grid
- Principal
- Priority Boarding
- Private
- Projection
- Promenade Deck
- Promotional Fare
- Propeller
- Property Irregularity Report
- Provisional Booking
- Provisioned Charter
- Pro Rata
- Publican
- Public Holiday