← August 2025 · October 2025 → · All months

83% of flights arrived on time in September 2025, and 0.5% were cancelled. Hawaiian Airlines was the most punctual airline (88%); JetBlue was the least (79%). The most delayed busy route was DEN → BOS (51% on time).

Airlines

#	Airline	Flights	On time	Year earlier	Cancelled
1	Hawaiian Airlines	6,428	88%	90%	0.2%
2	Delta Air Lines	135,028	87%	87%	0.3%
3	United Airlines	122,777	83%	86%	0.3%
4	Alaska Airlines	35,480	83%	79%	0.7%
5	Spirit Airlines	15,058	83%	82%	0.9%
6	Allegiant Air	6,925	83%	81%	0.0%
7	Southwest Airlines	110,361	83%	85%	0.2%
8	American Airlines	158,433	81%	82%	1.0%
9	Frontier Airlines	14,896	79%	75%	0.3%
10	JetBlue	16,215	79%	81%	0.6%

Most delayed routes

Route	Flights	On time
DEN → BOS	333	51%
EWR → BOS	336	52%
JAX → BOS	125	53%
DFW → BOS	313	53%
BNA → BOS	257	55%
MDW → BOS	128	55%
ORD → BOS	660	56%
BOS → MDW	128	56%
IAH → BOS	158	57%
IAD → BOS	142	57%
CLT → BOS	318	59%
PHL → BOS	427	59%
BWI → BOS	288	59%
IND → BOS	160	59%
DCA → BOS	761	60%
AUS → BOS	137	60%
ORD → PVD	124	63%
LAS → SFO	517	63%
LGA → BOS	634	63%
BOS → FLL	232	63%

Most reliable routes

Route	Flights	On time
SDF → ATL	239	99%
PNS → ATL	222	98%
SLC → LGB	124	98%
ATL → DAB	120	98%
DAB → ATL	120	97%
CVG → ATL	264	97%
SLC → OAK	146	97%
OKC → ATL	140	96%
LEX → ATL	192	96%
SRQ → ATL	162	96%
CHS → ATL	239	96%
BUF → ATL	124	96%
IND → IAH	120	96%
OGG → SFO	120	96%
FAY → CLT	189	96%
PIT → ATL	235	96%
RDU → ATL	401	96%
IND → DTW	197	95%
GSO → ATL	239	95%
DTW → TPA	149	95%

Airports

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

#	Airport	Departures	On time	Cancelled
1	HNL Honolulu	4,480	91%	0.3%
2	SLC Salt Lake City	9,436	88%	0.2%
3	DTW Detroit Metro	11,967	87%	0.2%
4	IAH Houston Bush Intercontinental	13,801	87%	0.1%
5	TPA Tampa	5,502	87%	0.2%
6	IAD Washington Dulles	7,455	87%	0.2%
7	ATL Atlanta Hartsfield-Jackson	28,269	86%	0.1%
8	CVG Cincinnati Northern Kentucky	3,375	86%	0.5%
9	HOU Houston Hobby	4,452	86%	0.1%
10	PIT Pittsburgh	3,938	86%	0.6%
11	CLE Cleveland Hopkins	3,632	86%	0.7%
12	MSY New Orleans	3,625	85%	0.4%
13	IND Indianapolis	4,144	85%	0.5%
14	BWI Baltimore/Washington	7,987	85%	0.2%
15	LAX Los Angeles LAX	15,749	85%	0.3%
16	SJC San Jose	3,927	85%	0.6%
17	BNA Nashville	9,005	85%	0.3%
18	SAT San Antonio	3,344	85%	0.6%
19	MSP Minneapolis-St. Paul	10,797	85%	0.1%
20	CLT Charlotte Douglas	19,097	85%	0.3%
21	CMH John Glenn Columbus	3,912	85%	0.5%
22	SMF Sacramento	4,890	85%	0.4%
23	RDU Raleigh-Durham	5,114	84%	0.5%
24	MCO Orlando	11,256	84%	0.2%
25	PDX Portland	6,466	84%	0.2%
26	SNA Orange County John Wayne	3,811	84%	0.6%
27	MDW Chicago Midway	6,488	84%	0.1%
28	AUS Austin-Bergstrom	6,981	84%	0.4%
29	STL St. Louis Lambert	5,753	83%	0.3%
30	SEA Seattle-Tacoma	16,135	83%	0.3%
31	PHL Philadelphia	10,347	83%	0.5%
32	FLL Fort Lauderdale	5,663	82%	0.4%
33	LGA LaGuardia	13,934	82%	0.9%
34	JFK New York JFK	10,383	82%	0.8%
35	PHX Phoenix Sky Harbor	13,850	82%	1.1%
36	SFO San Francisco	11,997	82%	0.3%
37	DAL Dallas Love Field	5,518	82%	0.1%
38	MCI Kansas City	4,188	82%	0.3%
39	EWR Newark	11,048	81%	1.2%
40	SAN San Diego	8,022	81%	1.4%
41	DEN Denver	26,548	79%	0.1%
42	ORD Chicago O'Hare	30,921	79%	0.4%
43	MIA Miami	7,573	78%	0.4%
44	LAS Las Vegas Harry Reid	14,604	78%	0.6%
45	DCA Washington Reagan National	12,271	77%	0.9%
46	DFW Dallas/Fort Worth	25,655	76%	1.9%
47	BOS Boston Logan	11,713	74%	1.3%

Routes need 120+ flights in the month to be ranked (1,754 were). Figures as published by BTS; frozen 2026-08. Method.

September 2025 report

Airlines

Most delayed routes

Most reliable routes

Airports