Airline Changes From 2008-2013

Last Update July 16, 2014



This page provides an overall summary of the U.S. passenger Carriers covered by this website and compare selected metrics for years ending December 31, 2013 through 2013.

U.S. Passenger Carriers Mergers & Acquisitions

2005 - America West merged with US Airways
2008 - Delta Air Lines acquired Northwest Airlines
2001 - American Airlines acquired Trans World Airlines
2010 - Continental Airlines and United airlines merged
2010 - Southwest acquired AirTran Airways
2013 - US Airways merged with American Airlines

Airline Codes


AA – American Airlines       HA – Hawaiian Airlines
AS – Alaska Airlines           NK – Spirit Airlines
B6 – jetBlue                      UA – United Airlines
DL – Delta Air Lines           US – US Airways
F9 – Frontier Airlines          VX – Virgin America
G4 – Allegiant Air               WN – Southwest Airlines






Some data has been excluded due to bankruptcy accounting or/and having irrelevant impact for comparison.


Some calculations use cumulative data with a year ending divisor which may cause a distortion of the conclusion.


SEC & BTS data for wage/benefits may not be reported the same


(SEC) US Security and Exchange Commission  


(BTS) Bureau of Transportation Statistics


Note: There are differences between how airlines categorize data for BTS & SEC reports.


Total revenue excludes recognized affiliate passenger revenue.


Operating expense excludes recognized affiliate expenses.


Operating income (loss) excludes known affiliate revenue and expenses.


Active full time equivalent employees from BTS data. May be estimated when data is not available.


Avg passenger fare is calculated from passenger revenue/passenger count.


Delta reports consolidated mainline and affiliate data for several categories. As such, airline to airline comparisons may not be valid.


Glossary of Terms-


ASM— Available Seat Mile. A measure of capacity. ASM’s equal the total number of seats available for transporting passengers during a reporting period multiplied by the total number of miles flown during that period.


RPM— Revenue Passenger Mile. One revenue-paying passenger transported one mile. RPM's equal the number of revenue passengers during a reporting period multiplied by the number of miles flown by those passengers during that period, RPM’s are also referred to as “traffic”.


Yield— The amount of passenger revenue earned per RPM during a reporting period.


RASM— Operating Revenue per ASM. The amount of operating revenue earned per ASM during a reporting period. RASM is also referred to as “unit revenue.”


PRASM— Passenger Revenue per ASM. The amount of passenger revenue earned per ASM during a reporting period. Passenger RASM is also referred to as “unit revenue.”


CASM— (Operating) Cost per Available Seat Mile. The amount of operating cost incurred per ASM during a reporting period, also referred to as “unit cost”.   


LF-- Passenger Load Factor — A measure of utilized available seating capacity calculated by dividing RPMs by ASM’s for a reporting period.          


Average fare-- Represents the average one-way fare paid per flight segment by a revenue passenger


o/w -- One way 


Disclaimer: Data source includes SEC, BTS, labor web sites & Corporate Reports. Except where noted, recognized affiliate revenue and costs were removed to provide mainline comparisons. All data is subject to unintentional errors.


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