System Passenger Revenue per Equivalent Seat Mile (PRESM)
STAGE LENGTH ADJUSTED
Cents per Equivalent Seat Mile
		1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015
American		9.91	10.32	10.66	10.84	10.23	11.35	10.21	9.00	9.31	9.45	10.21	11.06	11.39	11.82	10.49	11.55	12.27	12.87	13.24	13.60	12.33
Continental		7.91	8.95	9.55	9.65	9.58	10.69	9.79	9.57	9.67	9.86	10.58	11.38	12.01	12.79	11.02	12.57	13.78	-	-	-	-
Delta		8.32	8.51	8.71	8.82	8.71	9.27	8.08	7.83	8.28	8.11	8.39	9.66	10.64	11.45	9.79	10.96	11.85	12.35	12.63	13.13	12.59
Northwest		8.89	9.11	8.96	8.17	8.50	9.10	8.22	8.09	8.16	8.69	9.15	10.03	10.32	10.97	9.16	-	-	-	-	-	-
United		9.17	9.70	9.87	9.67	9.59	10.47	9.08	8.71	8.69	9.17	10.09	10.88	11.72	12.16	10.41	12.75	13.99	14.16	14.47	14.95	14.18
US Airways		8.75	9.68	9.94	10.00	9.40	9.38	8.23	7.80	8.32	8.12	8.09	14.56	13.08	9.96	8.62	9.64	10.61	10.98	11.24	11.56	-
America West		6.72	6.90	6.98	7.25	7.52	7.77	7.04	7.05	7.57	7.32	8.10	-	-	-	-	-	-	-	-	-	-
--sub Network		8.90	9.35	9.55	9.49	9.31	10.04	8.95	8.49	8.74	8.90	9.47	10.46	11.03	11.60	10.00	11.45	12.43	12.87	13.23	13.59	13.02
Southwest		5.18	5.50	5.65	5.80	6.01	6.53	5.93	5.66	5.82	5.92	6.29	6.98	6.98	7.47	7.34	8.46	9.14	9.21	9.82	10.47	10.35
jetBlue		-	-	-	-	-	6.99	7.41	8.15	7.94	7.31	7.73	8.13	8.34	9.66	8.97	9.57	10.58	10.86	11.05	11.29	11.46
AirTran		-	-	6.53	5.82	6.28	7.72	7.39	6.44	6.77	6.49	7.10	7.38	7.70	8.13	7.22	7.91	8.58	-	-	-	-
Frontier		5.46	6.74	6.37	7.76	8.09	10.14	8.70	8.04	7.66	7.49	8.26	8.28	8.14	8.97	7.76	9.02	11.11	8.87	9.11	8.79	7.10
Virgin America		-	-	-	-	-	-	-	-	-	-	-	-	1.95	8.14	8.18	9.96	11.22	11.24	11.64	11.88	11.53
-- sub LCC		5.18	5.53	5.75	5.94	6.17	6.82	6.26	6.01	6.26	6.30	6.77	7.35	7.42	8.16	7.72	8.73	9.52	9.66	10.25	10.74	10.51
Alaska		6.43	6.80	7.38	7.42	7.74	8.37	7.98	7.77	7.96	8.13	8.74	9.39	9.44	9.87	9.57	10.32	11.10	11.57	11.40	11.63	11.05
Hawaiian		3.92	4.03	4.03	4.12	6.86	4.40	4.50	5.95	6.72	7.49	7.62	7.59	7.58	8.62	7.58	8.31	9.53	9.54	9.64	9.89	9.48
Spirit		7.00	5.80	5.26	6.75	6.75	6.77	7.12	7.06	7.74	7.34	7.79	8.39	7.56	7.33	6.69	6.36	6.95	6.45	6.74	6.76	5.43
Allegiant		-	-	-	-	-	-	-	-	-	3.87	5.67	6.22	6.45	6.88	6.26	6.76	7.59	7.60	7.94	8.11	7.03
-- sub Other		5.97	6.17	6.49	6.66	7.46	7.14	7.02	7.40	7.64	7.89	8.38	8.78	8.57	9.04	8.47	8.95	9.74	9.75	9.69	9.79	8.81
Base Length of Haul		839	869	886	909	931	935	955	967	1,005	1,039	1,060	1,085	1,092	1,113	1,124	1,153	1,168	1,183	1,198	1,191	1,185
Note:   Stage Length Adjustment formula:  ((observed length of haul/base length of haul [15 carrier average])^.5) times respective carrier PRASM.
Data Source:  US DOT Form 41 via BTS, Schedules P12 & T2.