Between the 1983-84 and 2018-19 seasons, the Philadelphia Flyers had their best record in a season in 1984-85, with a record of 53-20-7.

what is the best record for any flyers team since 1984 but before before 2020

Interpreted as:

What is the best record in a regular season for any flyers team since 1984 but before before 2020?

TEAM	REC	SEASON	GP	PTS	W	L	T	OTL	PTS%	G	GA	PP%	PK%	S/GP	SA/GP
Philadelphia Flyers	53-20-7	1984-85	80	113	53	20	7		.706	348	241	22.3	79.8	33.70	29.83
Philadelphia Flyers	53-23-4	1985-86	80	110	53	23	4		.688	335	241	23.6	82.8	34.13	28.89
Philadelphia Flyers	45-20-13-4	2002-03	82	107	45	20	13	4	.652	211	166	14.3	85.2	30.94	24.62
Philadelphia Flyers	47-23-12	2010-11	82	106	47	23		12	.646	256	216	16.6	82.7	31.77	30.13
Philadelphia Flyers	45-22-12-3	1999-00	82	105	45	22	12	3	.640	237	179	20.3	86.7	30.43	23.65
Philadelphia Flyers	47-26-9	2011-12	82	103	47	26		9	.628	260	225	19.7	81.8	32.21	28.40
Philadelphia Flyers	45-24-13	1996-97	82	103	45	24	13		.628	274	217	14.6	85.7	32.24	25.70
Philadelphia Flyers	45-24-13	1995-96	82	103	45	24	13		.628	282	208	19.7	85.8	30.85	25.89
Philadelphia Flyers	28-16-4	1994-95	48	60	28	16	4		.625	150	132	19.6	80.8	27.38	26.85
Philadelphia Flyers	46-26-8	1986-87	80	100	46	26	8		.625	310	245	19.0	82.2	30.18	30.71
Philadelphia Flyers	45-26-11	2005-06	82	101	45	26		11	.616	263	253	18.0	79.1	31.12	28.93
Philadelphia Flyers	40-21-15-6	2003-04	82	101	40	21	15	6	.616	229	186	20.7	83.3	29.40	25.51
Philadelphia Flyers	44-26-10	1983-84	80	98	44	26	10		.613	350	290	20.2	76.6	36.75	28.65
Philadelphia Flyers	43-25-11-3	2000-01	82	100	43	25	11	3	.610	240	207	15.7	82.5	29.90	26.15
Philadelphia Flyers	44-27-11	2008-09	82	99	44	27		11	.604	260	232	22.5	83.0	29.77	32.54
Philadelphia Flyers	42-26-14	2017-18	82	98	42	26		14	.598	249	236	20.7	75.8	32.09	29.85
Philadelphia Flyers	42-27-10-3	2001-02	82	97	42	27	10	3	.591	234	192	13.0	86.3	29.78	26.09
Philadelphia Flyers	41-27-14	2015-16	82	96	41	27		14	.585	211	210	18.9	80.5	30.98	30.72
Philadelphia Flyers	42-29-11	2007-08	82	95	42	29		11	.579	245	227	21.8	83.2	28.77	31.82
Philadelphia Flyers	42-29-11	1997-98	82	95	42	29	11		.579	242	193	17.8	86.6	28.68	25.41
Philadelphia Flyers	42-30-10	2013-14	82	94	42	30		10	.573	233	227	19.7	84.8	30.37	30.59
Philadelphia Flyers	37-26-19	1998-99	82	93	37	26	19		.567	231	196	16.8	84.1	29.89	22.89
Philadelphia Flyers	39-33-10	2016-17	82	88	39	33		10	.537	212	231	19.5	79.8	31.52	28.46
Philadelphia Flyers	41-35-6	2009-10	82	88	41	35		6	.537	232	222	21.5	83.0	31.57	28.61
Philadelphia Flyers	38-33-9	1987-88	80	85	38	33	9		.531	292	292	18.0	81.1	31.03	30.55