80% of flights arrived on time in September 2023, and 1.2% were cancelled. Hawaiian Airlines was the most punctual airline (88%); JetBlue was the least (60%). The most delayed busy route was FLL → BOS (56% on time).

Airlines

#	Airline	Flights	On time	Year earlier	Cancelled
1	Hawaiian Airlines	6,718	88%	—	1.0%
2	Delta Air Lines	124,220	85%	—	1.5%
3	Alaska Airlines	33,901	83%	—	0.3%
4	United Airlines	109,488	81%	—	1.5%
5	American Airlines	146,825	80%	—	1.2%
6	Southwest Airlines	117,870	80%	—	0.6%
7	Allegiant Air	6,892	78%	—	0.3%
8	Spirit Airlines	21,036	75%	—	1.6%
9	Frontier Airlines	16,353	71%	—	2.0%
10	JetBlue	21,412	60%	—	3.4%

Most delayed routes

Route	Flights	On time
FLL → BOS	234	56%
PIT → BOS	160	56%
BWI → BOS	353	56%
DEN → BOS	316	57%
IAD → BOS	120	57%
BOS → FLL	232	58%
JFK → MCO	392	58%
JFK → SJU	206	58%
BWI → PHX	120	58%
BDL → MCO	152	59%
BOS → RDU	274	59%
MCO → JFK	389	59%
BOS → MCO	393	60%
JFK → PBI	146	60%
JFK → DTW	210	61%
STL → BOS	141	61%
CLT → BOS	419	61%
MIA → EWR	324	61%
AUS → BOS	193	61%
DTW → JFK	211	61%

Most reliable routes

Route	Flights	On time
LEX → ATL	170	98%
HSV → ATL	188	97%
OGG → KOA	154	97%
SAN → ATL	202	97%
ATL → LEX	170	96%
VPS → ATL	164	96%
BHM → ATL	234	96%
ITO → HNL	552	96%
ATL → ECP	163	96%
ECP → ATL	164	95%
MYR → ATL	120	95%
PNS → ATL	194	95%
TUL → ATL	134	95%
OMA → ATL	188	95%
ATL → VPS	164	95%
KOA → LAX	126	94%
HNL → ITO	553	94%
SDF → ATL	246	94%
GEG → SLC	140	94%
CAE → ATL	172	94%

Airports

Airports with at least 3,000 departures in the month, most punctual first.

#	Airport	Departures	On time	Cancelled
1	HNL Honolulu	5,018	89%	0.4%
2	SLC Salt Lake City	9,167	86%	0.3%
3	SMF Sacramento	4,552	86%	0.4%
4	PDX Portland	5,845	86%	0.3%
5	SNA Orange County John Wayne	3,835	85%	0.8%
6	MSP Minneapolis-St. Paul	10,399	85%	0.5%
7	SJC San Jose	4,490	85%	0.5%
8	ATL Atlanta Hartsfield-Jackson	28,353	84%	0.3%
9	PHX Phoenix Sky Harbor	14,441	84%	0.3%
10	DTW Detroit Metro	10,934	84%	1.1%
11	LAX Los Angeles LAX	16,340	84%	0.5%
12	SAN San Diego	7,706	84%	0.6%
13	CMH John Glenn Columbus	3,602	83%	1.9%
14	SAT San Antonio	3,355	83%	0.5%
15	SFO San Francisco	11,775	82%	0.6%
16	PIT Pittsburgh	3,564	82%	2.3%
17	MCI Kansas City	4,237	82%	1.1%
18	OAK Oakland	3,862	82%	0.5%
19	IND Indianapolis	3,765	82%	2.0%
20	CVG Cincinnati Northern Kentucky	3,509	82%	2.1%
21	SEA Seattle-Tacoma	16,468	82%	0.3%
22	CLE Cleveland Hopkins	3,777	81%	2.4%
23	BNA Nashville	8,127	81%	1.0%
24	TPA Tampa	5,700	81%	0.9%
25	MSY New Orleans	3,643	80%	1.0%
26	STL St. Louis Lambert	5,560	80%	0.8%
27	DCA Washington Reagan National	11,720	80%	2.5%
28	HOU Houston Hobby	4,504	80%	0.4%
29	IAD Washington Dulles	6,434	80%	2.2%
30	CLT Charlotte Douglas	18,962	80%	0.9%
31	DAL Dallas Love Field	6,221	79%	0.4%
32	RDU Raleigh-Durham	5,301	79%	2.3%
33	IAH Houston Bush Intercontinental	12,886	79%	0.6%
34	AUS Austin-Bergstrom	7,867	78%	0.8%
35	DEN Denver	25,608	78%	0.5%
36	ORD Chicago O'Hare	25,347	77%	0.6%
37	DFW Dallas/Fort Worth	24,668	77%	0.6%
38	PHL Philadelphia	9,763	77%	2.1%
39	EWR Newark	12,281	76%	5.1%
40	MDW Chicago Midway	7,109	76%	0.6%
41	LAS Las Vegas Harry Reid	16,188	75%	1.0%
42	BWI Baltimore/Washington	8,013	75%	1.5%
43	LGA LaGuardia	13,597	73%	6.1%
44	MCO Orlando	12,265	72%	1.3%
45	FLL Fort Lauderdale	6,571	71%	1.3%
46	BOS Boston Logan	11,839	71%	3.3%
47	MIA Miami	7,554	70%	1.1%
48	JFK New York JFK	10,760	69%	5.3%

Routes need 120+ flights in the month to be ranked (1,643 were). Figures as published by BTS; frozen 2026-08. Method.

September 2023 report

Airlines

Most delayed routes

Most reliable routes

Airports