System Passenger Yield per Equivalent Seat Mile
STAGE LENGTH ADJUSTED
Cents per Equivalent Passenger Mile
		1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
American		14.99	15.09	15.35	15.47	14.75	15.70	14.74	12.75	12.81	12.66	13.02	14.16	14.32	14.69	13.02	14.12	15.01	15.57	16.00	16.57	14.66	14.39	14.99	15.49	15.09	13.18
Continental		12.02	13.11	13.37	13.37	13.16	14.39	13.55	12.91	12.81	12.71	13.29	14.33	14.97	15.78	13.39	15.00	16.89	-	-	-	-	-	-	-	-	-
Delta		12.74	12.13	12.15	12.15	12.09	12.68	11.73	10.84	13.25	11.76	10.85	12.56	13.46	13.99	11.93	13.11	14.35	14.66	14.98	15.38	14.78	14.03	14.21	15.05	15.07	14.08
Northwest		12.45	12.48	12.07	11.20	11.45	11.91	11.08	10.51	10.59	10.86	11.11	12.13	12.49	12.95	10.96	-	-	-	-	-	-	-	-	-	-	-
United		13.02	13.55	13.76	13.53	13.56	14.50	12.87	11.86	11.39	11.60	12.41	13.60	14.51	15.03	12.73	15.19	16.75	16.99	17.34	17.87	17.04	16.05	15.96	16.48	16.71	15.67
US Airways		13.49	14.15	13.94	13.77	13.46	13.34	11.98	10.99	11.37	10.84	10.78	11.42	11.49	12.21	10.54	11.72	12.70	13.07	13.30	13.93	-	-	-	-	-	-
America West		9.81	9.76	10.17	10.78	11.04	11.05	9.82	9.59	9.93	9.48	10.21	11.65	11.14	-	-	-	-	-	-	-	-	-	-	-	-	-
--sub Network		13.16	13.32	13.38	13.25	13.08	13.77	12.69	11.65	12.09	11.78	11.95	12.79	13.31	14.23	12.22	13.78	15.06	15.40	15.76	16.27	15.52	14.81	15.04	15.60	15.63	14.41
Southwest		8.04	8.28	8.86	8.97	8.75	9.29	8.73	8.60	8.73	8.53	8.92	9.80	9.85	10.51	9.68	10.69	11.33	13.30	14.26	13.57	12.41	12.02	11.94	12.02	12.21	10.81
AirTran		-	-	9.92	10.13	10.21	11.02	10.68	9.57	9.57	9.21	9.69	10.42	10.38	10.32	9.10	9.74	10.61	-	-	-	-	-	-	-	-	-
jetBlue		-	-	-	-	-	9.64	9.64	9.85	9.45	8.83	9.12	10.23	10.67	11.75	11.04	11.78	12.85	12.99	13.27	13.48	13.59	12.76	12.77	13.17	13.31	13.82
Alaska		10.42	10.32	10.98	11.07	11.44	12.11	11.70	11.42	11.45	11.18	11.55	12.59	12.65	12.79	12.08	12.41	13.06	13.38	13.31	13.57	13.12	12.53	12.79	13.74	13.28	13.13
Virgin America		-	-	-	-	-	-	-	-	-	-	-	-	8.61	10.90	9.94	12.24	13.81	14.21	14.58	14.42	14.07	13.29	13.00	-	-	-
Hawaiian		5.11	5.36	5.27	5.45	8.93	5.65	5.65	7.47	8.38	8.72	8.75	9.02	8.90	10.45	9.04	9.74	11.33	11.48	11.93	12.17	11.68	11.72	12.31	12.54	12.46	11.65
-- sub Hybrid		8.16	8.32	8.88	9.06	8.93	9.39	9.09	9.02	9.08	8.89	9.24	10.16	10.28	11.04	10.08	10.96	11.79	12.08	12.64	12.95	12.63	12.19	12.22	12.24	12.45	11.60
Allegiant		-	-	-	-	-	-	-	-	-	5.09	7.06	7.88	7.91	7.69	6.98	7.53	8.36	8.56	8.97	9.09	8.13	7.34	7.35	7.40	7.83	8.04
Frontier		11.29	11.27	11.23	13.14	13.74	15.79	15.07	13.60	11.09	10.22	10.44	10.67	10.60	10.97	9.58	10.80	12.78	10.00	10.09	9.88	8.24	6.48	5.91	5.52	5.39	5.22
Spirit		8.54	8.48	6.99	8.89	9.17	9.32	9.74	9.63	9.83	9.46	9.76	10.49	9.60	9.12	8.51	7.76	8.13	7.59	7.83	7.83	6.46	5.59	5.67	5.88	5.64	4.40
-- sub ULCC		9.99	10.32	9.37	11.07	11.36	12.25	12.02	11.29	9.98	9.55	9.91	10.21	9.84	9.73	8.59	8.98	10.15	8.76	8.90	8.83	7.39	6.23	6.05	6.02	5.95	5.40
Base Length of Haul		837	867	884	906	923	931	951	964	1,001	1,034	1,056	1,030	1,041	1,111	1,122	1,149	1,163	1,178	1,187	1,191	1,178	1,165	1,162	1,147	1,152	1,123
Note:   Stage Length Adjustment formula:  ((observed length of haul/base length of haul [15 carrier average])^.5) times respective carrier yield.
Data Source:  US DOT Form 41 via BTS, Schedules P12 & T2.