System Total Operating Revenue per Equivalent Seat Mile (TRESM)
STAGE LENGTH ADJUSTED
Cents per Equivalent Seat Mile
		1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007
American		11.58	11.42	11.80	12.01	11.39	12.55	11.33	9.90	11.37	11.73	12.72	13.92	14.36
Continental		8.91	10.02	10.65	11.01	11.02	12.10	10.89	10.67	10.81	13.61	14.79	15.90	16.33
Delta		9.15	9.43	9.66	9.79	9.83	10.04	8.98	9.05	11.44	11.35	11.91	14.34	16.01
Northwest		10.18	10.30	10.22	9.46	9.77	10.46	9.58	9.54	9.83	11.60	12.75	13.89	14.13
United		10.46	11.08	11.32	11.14	11.16	12.19	10.84	10.51	10.95	12.04	14.00	15.13	15.81
US Airways		9.72	10.94	11.84	12.18	11.62	11.39	10.32	10.31	11.41	11.36	11.55	14.09	14.61
America West		7.25	7.42	7.49	7.76	8.04	8.25	7.41	7.41	7.97	8.28	10.96	-	-
--sub Network		10.09	10.49	10.80	10.80	10.69	11.38	10.28	9.87	10.93	11.77	12.88	14.50	15.19
Southwest		5.38	5.72	5.91	6.09	6.33	6.83	6.22	5.96	6.15	6.31	6.72	7.41	7.50
jetBlue		-	-	-	-	-	7.19	7.63	8.41	8.20	7.57	8.11	8.63	8.99
AirTran		-	-	6.77	6.24	6.76	7.97	7.57	6.61	6.99	6.73	7.40	7.71	8.10
Frontier		5.67	6.99	6.73	8.18	8.48	10.54	9.06	8.41	8.09	8.77	9.82	9.83	9.75
ATA		6.38	6.39	6.99	6.89	7.16	7.84	8.10	7.33	7.59	7.35	8.60	11.16	4.93
-- sub LCC		5.68	6.06	6.39	6.43	6.61	7.22	6.73	6.45	6.71	6.78	7.34	7.97	7.88
Alaska		7.78	8.01	8.54	8.55	8.87	9.33	8.98	8.76	8.99	9.29	9.97	10.63	11.69
Hawaiian		4.56	4.74	4.89	4.95	8.39	5.62	5.64	6.93	7.56	8.38	8.36	8.39	8.37
Midwest		11.35	12.39	12.36	12.58	12.23	12.15	11.04	10.07	9.40	8.60	8.99	10.19	11.36
-- sub Other		7.48	7.74	8.12	8.21	9.14	8.77	8.45	8.67	8.79	9.15	9.59	10.19	10.96
Base Length of Haul		844	874	891	910	930	936	957	968	1,007	1,041	1,062	1,088	1,095
Note: Shaded data means data appear questionable.
Note:   Stage Length Adjustment formula:  ((observed length of haul/base length of haul [15 carrier average])^.5) times respective carrier unit cost.
Data Source:  US DOT Form 41 via BTS, Schedules P12 & T2.