Glossary

[L]

View Terms beginning with:
Term	Definition
L	Booking class - use varies depending upon airline
LA	IATA code for LATAM
LATINPASS	In 2000, this Latin American airline alliance gained notoriety when it sponsored one of the most lucrative promotions to date. The promotion gave members the opportunity to earn one million miles for a minimal amount of partner usage. Frequent flyers recognized the value of the promotion immediately, and before long, LatinPass was overwhelmed by the number of participants, most of whom were members of the online forum FlyerTalk or had heard of the promotion from FlyerTalk. To this day, LatinPass is synonymous with irresistable, yet error-plagued promotions.
LCC	Low Cost Carrier
LEAP	CFM (GE-SNECMA) Leading Edge Aviation Propulsion high bypass turbofan to be used on the future AA 737 MAX
LEFT SEAT	Pilot a.k.a. Captain
LEISURE RENTAL	When a traveler pays non-corporate rates for a car rental, and thereby earns a different amount of miles than a corporate rate would earn.
LEO	Law Enforcement Officer
LFBU	Load Factor Based Upgrade sold at self-service check-in kiosk
LGA	Liquids, Gels, and Aerosols
LH	Lufthansa Airlines. Also an abbreviation for "long haul".
LIFO	Last In, First Out
LINKED ACCOUNTS	When two members of a program earn miles into the same account or can transfer miles between their two separate accounts; usually involves an affinity card.
LL	Add to waitlist.
LO	Lot Polish Airlines
LOL	Internet lingo meaning "Laugh(ing) Out Loud"
LONE	Oneworld explorer ticket in Coach
LP	Lan Peru
LRTC	Less Room Throughout Coach. Refers to American AAdvantage adding seats back to Coach after removing 'rows' of seats and heralding the extra room with the MRTC (More Room Throughout Coach) marketing campaign.
LURKER	A person who reads forums, but who does not post messages.
LUT Fares	The lowest fare booking classes, which have only recently been admitted to the upgrade lottery — unless you are somebody’s companion, that is. On international flights, the upgrade window opens 12 hours after boarding time. Also known as (S)LUT Fares or .5LUT Fares.
LUV	Used to denote Southwest Airlines / WN
LX	Swiss International Air Lines.
LY	El Al Israel Airlines