73% of flights arrived on time in June 2026, and 1.7% were cancelled. Delta Air Lines was the most punctual airline (81%); Southwest Airlines was the least (65%). The most delayed busy route was BUR → SFO (31% on time).

Airlines

#	Airline	Flights	On time	Year earlier	Cancelled
1	Delta Air Lines	143,466	81%	73%	1.4%
2	Alaska Airlines	44,843	79%	73%	0.8%
3	United Airlines	131,979	74%	71%	1.1%
4	JetBlue	20,804	74%	71%	1.5%
5	American Airlines	177,989	71%	66%	3.4%
6	Frontier Airlines	19,104	70%	59%	2.0%
7	Allegiant Air	12,663	68%	69%	0.5%
8	Southwest Airlines	120,933	65%	71%	0.6%

Most delayed routes

Route	Flights	On time
BUR → SFO	261	31%
ONT → SFO	120	33%
CLT → SFO	140	34%
DFW → SFO	424	36%
SAN → SFO	657	37%
PHX → SFO	383	37%
PSP → SFO	200	38%
SEA → SFO	633	39%
BOI → SFO	141	39%
DEN → SFO	494	39%
LAS → SFO	510	40%
RNO → SFO	146	40%
SNA → SFO	388	41%
SLC → SFO	291	42%
DTW → SFO	178	42%
DAL → LGA	138	43%
DFW → FAT	140	44%
DFW → VPS	132	44%
DFW → SMF	137	45%
MSP → SFO	183	45%

Most reliable routes

Route	Flights	On time
BOI → LAX	147	99%
IDA → SLC	120	96%
SLC → IDA	120	96%
ANC → PDX	150	95%
KOA → LAX	159	93%
SLC → OAK	121	93%
SAN → IAD	120	93%
MHT → BWI	146	92%
PDX → GEG	149	92%
SGU → SLC	147	92%
CLE → IAD	120	92%
SRQ → ATL	197	91%
CMH → DTW	173	91%
LIT → ATL	203	91%
BOI → PDX	146	91%
CHS → ATL	308	91%
IND → ATL	264	91%
SEA → DTW	209	91%
TUL → ATL	143	91%
KOA → SEA	120	91%

Airports

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

#	Airport	Departures	On time	Cancelled
1	HNL Honolulu	4,899	83%	0.7%
2	SLC Salt Lake City	10,132	83%	0.5%
3	SJU San Juan	3,095	82%	0.6%
4	PDX Portland	7,127	81%	0.6%
5	CMH John Glenn Columbus	4,055	79%	1.6%
6	ATL Atlanta Hartsfield-Jackson	29,972	79%	1.3%
7	SEA Seattle-Tacoma	17,059	78%	0.5%
8	IND Indianapolis	4,613	78%	1.9%
9	IAD Washington Dulles	7,897	78%	1.2%
10	DTW Detroit Metro	11,858	78%	1.4%
11	SMF Sacramento	5,040	77%	0.5%
12	PIT Pittsburgh	4,067	77%	1.7%
13	TPA Tampa	5,964	77%	0.9%
14	EWR Newark	10,854	77%	1.7%
15	CVG Cincinnati Northern Kentucky	3,918	76%	1.7%
16	CLE Cleveland Hopkins	4,044	76%	2.5%
17	LAX Los Angeles LAX	16,817	76%	0.6%
18	MSP Minneapolis-St. Paul	11,567	76%	0.9%
19	MCI Kansas City	4,726	76%	1.3%
20	BOS Boston Logan	12,683	75%	1.8%
21	RDU Raleigh-Durham	5,367	74%	2.3%
22	SJC San Jose	3,937	74%	0.6%
23	SNA Orange County John Wayne	3,882	74%	1.0%
24	PHL Philadelphia	12,008	74%	2.6%
25	MIA Miami	8,797	73%	0.8%
26	FLL Fort Lauderdale	6,077	73%	1.1%
27	JFK New York JFK	10,550	73%	2.5%
28	CLT Charlotte Douglas	19,705	72%	1.8%
29	MCO Orlando	12,548	72%	1.0%
30	SAT San Antonio	3,463	72%	1.7%
31	PHX Phoenix Sky Harbor	15,743	72%	0.4%
32	LGA LaGuardia	13,779	71%	4.7%
33	IAH Houston Bush Intercontinental	14,401	71%	0.8%
34	BWI Baltimore/Washington	8,045	70%	1.2%
35	LAS Las Vegas Harry Reid	13,900	70%	0.8%
36	SAN San Diego	9,762	69%	1.1%
37	ORD Chicago O'Hare	33,920	69%	3.3%
38	MSY New Orleans	3,746	69%	1.1%
39	STL St. Louis Lambert	5,952	69%	1.4%
40	AUS Austin-Bergstrom	8,012	68%	1.0%
41	DCA Washington Reagan National	12,375	68%	4.9%
42	DEN Denver	28,634	67%	0.4%
43	SFO San Francisco	13,588	66%	0.7%
44	BNA Nashville	10,000	65%	1.1%
45	MDW Chicago Midway	7,117	63%	1.5%
46	HOU Houston Hobby	4,514	63%	0.6%
47	DFW Dallas/Fort Worth	27,855	60%	4.5%
48	DAL Dallas Love Field	6,025	56%	1.2%

Routes need 120+ flights in the month to be ranked (1,886 were). Figures as published by BTS; frozen 2026-08. Method.

June 2026 report

Airlines

Most delayed routes

Most reliable routes

Airports