75% of flights arrived on time in May 2025, and 1.1% were cancelled. Hawaiian Airlines was the most punctual airline (87%); Frontier Airlines was the least (69%). The most delayed busy route was IAD → EWR (31% on time).

Airlines

#	Airline	Flights	On time	Year earlier	Cancelled
1	Hawaiian Airlines	6,985	87%	77%	0.3%
2	Delta Air Lines	141,809	78%	80%	0.6%
3	Alaska Airlines	37,147	78%	78%	0.5%
4	Southwest Airlines	119,819	76%	71%	0.5%
5	Allegiant Air	11,079	76%	79%	0.1%
6	United Airlines	123,628	76%	73%	1.4%
7	Spirit Airlines	17,744	74%	72%	1.2%
8	JetBlue	19,663	73%	74%	0.5%
9	American Airlines	173,676	72%	66%	2.1%
10	Frontier Airlines	16,036	69%	64%	1.0%

Most delayed routes

Route	Flights	On time
IAD → EWR	147	31%
ATL → EWR	468	35%
CLT → EWR	263	36%
RDU → EWR	213	36%
MSP → EWR	152	40%
MCO → EWR	511	41%
BNA → EWR	159	42%
DTW → EWR	197	43%
EWR → ATL	468	44%
PBI → EWR	255	44%
BOS → EWR	262	44%
ORD → EWR	509	44%
AUS → EWR	136	45%
DCA → EWR	215	47%
DFW → EWR	255	47%
MIA → EWR	288	47%
TPA → EWR	222	47%
CHS → EWR	128	48%
EWR → RDU	214	50%
FLL → EWR	333	50%

Most reliable routes

Route	Flights	On time
KOA → OGG	124	98%
SGU → SLC	175	96%
BOI → LAX	155	95%
LIH → OGG	124	95%
PDX → SLC	220	95%
SJC → LGB	120	95%
SLC → SGU	175	95%
BOI → PDX	155	95%
LAX → ABQ	203	95%
LAX → SAN	229	94%
LGB → SJC	120	94%
HNL → KOA	650	94%
HNL → OGG	882	94%
BOI → SLC	148	94%
KOA → HNL	650	94%
CMH → DTW	143	94%
HNL → LIH	698	94%
OGG → LIH	124	94%
ITO → HNL	542	93%
ANC → FAI	240	93%

Airports

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

#	Airport	Departures	On time	Cancelled
1	HNL Honolulu	4,931	88%	0.4%
2	OAK Oakland	3,357	84%	0.4%
3	SJC San Jose	4,199	84%	0.3%
4	PDX Portland	6,503	84%	0.3%
5	SLC Salt Lake City	9,955	84%	0.2%
6	SMF Sacramento	5,321	83%	0.4%
7	LAX Los Angeles LAX	17,040	82%	0.4%
8	SJU San Juan	3,067	81%	0.1%
9	MSP Minneapolis-St. Paul	10,991	80%	0.5%
10	SNA Orange County John Wayne	3,997	80%	0.6%
11	DTW Detroit Metro	12,070	79%	0.5%
12	PHX Phoenix Sky Harbor	17,278	79%	0.4%
13	MCI Kansas City	4,561	79%	0.8%
14	PIT Pittsburgh	4,036	79%	0.9%
15	IND Indianapolis	4,559	78%	1.3%
16	SFO San Francisco	13,153	78%	0.4%
17	MDW Chicago Midway	6,128	78%	0.3%
18	CLE Cleveland Hopkins	3,927	78%	1.0%
19	ORD Chicago O'Hare	30,877	78%	0.6%
20	LAS Las Vegas Harry Reid	16,940	78%	0.5%
21	SAT San Antonio	3,832	78%	1.3%
22	SAN San Diego	8,531	78%	0.6%
23	STL St. Louis Lambert	6,015	77%	1.2%
24	SEA Seattle-Tacoma	16,445	77%	0.4%
25	TPA Tampa	6,969	76%	0.6%
26	CMH John Glenn Columbus	4,071	76%	1.3%
27	HOU Houston Hobby	4,742	76%	0.9%
28	RDU Raleigh-Durham	5,486	75%	1.4%
29	MSY New Orleans	4,510	75%	1.0%
30	CVG Cincinnati Northern Kentucky	3,742	75%	1.4%
31	FLL Fort Lauderdale	6,890	74%	0.5%
32	BOS Boston Logan	12,651	74%	0.8%
33	IAH Houston Bush Intercontinental	14,701	74%	1.7%
34	JFK New York JFK	10,923	73%	1.1%
35	BWI Baltimore/Washington	8,438	73%	0.5%
36	BNA Nashville	9,739	72%	1.3%
37	IAD Washington Dulles	8,736	72%	0.9%
38	AUS Austin-Bergstrom	7,726	71%	1.1%
39	CLT Charlotte Douglas	21,584	71%	1.7%
40	ATL Atlanta Hartsfield-Jackson	30,460	71%	0.4%
41	DEN Denver	26,894	70%	0.7%
42	MIA Miami	9,440	70%	0.9%
43	PHL Philadelphia	11,081	70%	1.9%
44	LGA LaGuardia	14,042	69%	2.1%
45	MCO Orlando	13,597	69%	0.6%
46	DAL Dallas Love Field	6,186	69%	1.8%
47	DCA Washington Reagan National	12,605	69%	2.8%
48	DFW Dallas/Fort Worth	27,232	66%	3.1%
49	EWR Newark	9,600	61%	5.6%

Routes need 120+ flights in the month to be ranked (1,901 were). Figures as published by BTS; frozen 2026-08. Method.

May 2025 report

Airlines

Most delayed routes

Most reliable routes

Airports