80% of flights arrived on time in April 2024, and 0.7% were cancelled. Allegiant Air was the most punctual airline (86%); Frontier Airlines was the least (69%). The most delayed busy route was BUR → SFO (42% on time).

Airlines

#	Airline	Flights	On time	Year earlier	Cancelled
1	Allegiant Air	9,271	86%	—	0.5%
2	Delta Air Lines	126,372	85%	—	0.3%
3	Hawaiian Airlines	6,375	84%	—	1.3%
4	Spirit Airlines	21,998	81%	—	1.1%
5	United Airlines	108,768	81%	—	0.7%
6	Southwest Airlines	120,579	80%	—	0.4%
7	Alaska Airlines	32,607	79%	—	0.6%
8	American Airlines	156,745	78%	—	1.0%
9	JetBlue	20,124	76%	—	1.4%
10	Frontier Airlines	17,081	69%	—	1.7%

Most delayed routes

Route	Flights	On time
BUR → SFO	231	42%
SAN → SFO	559	42%
PDX → SFO	311	43%
SNA → SFO	347	44%
PSP → SFO	226	46%
DFW → SFO	326	47%
LAS → SFO	485	49%
RNO → SFO	120	50%
SEA → SFO	526	50%
PHX → SFO	426	51%
LAX → SFO	1001	52%
FLL → SFO	149	52%
SLC → SFO	287	53%
EYW → CLT	146	53%
MSP → SFO	145	53%
MIA → SFO	120	53%
ATL → SFO	257	55%
DEN → SFO	455	55%
BOI → SFO	120	57%
AUS → SFO	146	58%

Most reliable routes

Route	Flights	On time
MYR → ATL	120	98%
ATL → MYR	120	97%
LAS → PHL	120	96%
HRL → IAH	150	95%
GEG → SLC	146	95%
MFE → IAH	197	94%
OGG → KOA	120	94%
MSP → SLC	137	94%
MCI → ATL	270	94%
BDL → ATL	168	94%
EUG → SEA	211	94%
MSP → SEA	225	94%
PDX → GEG	142	94%
SDF → ATL	250	94%
XNA → ATL	138	93%
BRO → IAH	120	93%
KOA → OGG	120	93%
LIT → ATL	200	93%
ONT → SEA	207	93%
GSO → ATL	206	93%

Airports

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

#	Airport	Departures	On time	Cancelled
1	SJC San Jose	4,023	87%	0.3%
2	MSP Minneapolis-St. Paul	10,344	86%	0.2%
3	HNL Honolulu	5,104	86%	1.0%
4	OAK Oakland	3,584	86%	0.4%
5	IND Indianapolis	4,009	85%	0.7%
6	CMH John Glenn Columbus	3,510	85%	0.3%
7	SLC Salt Lake City	9,362	84%	0.2%
8	PDX Portland	5,687	84%	0.3%
9	DTW Detroit Metro	10,892	84%	0.4%
10	SMF Sacramento	4,577	83%	0.3%
11	PIT Pittsburgh	3,641	83%	0.5%
12	BNA Nashville	8,314	83%	0.4%
13	LGA LaGuardia	13,515	83%	1.4%
14	CLE Cleveland Hopkins	3,528	83%	0.8%
15	CVG Cincinnati Northern Kentucky	3,707	83%	0.5%
16	PHL Philadelphia	9,774	83%	0.5%
17	MCI Kansas City	4,250	83%	0.5%
18	IAD Washington Dulles	6,203	82%	0.4%
19	SAT San Antonio	3,491	82%	0.5%
20	PHX Phoenix Sky Harbor	16,675	82%	0.3%
21	RSW Southwest Florida	3,511	81%	1.3%
22	STL St. Louis Lambert	5,629	81%	0.6%
23	SEA Seattle-Tacoma	14,583	81%	0.2%
24	ATL Atlanta Hartsfield-Jackson	28,569	81%	0.2%
25	SNA Orange County John Wayne	3,657	81%	0.5%
26	LAX Los Angeles LAX	15,882	80%	0.3%
27	HOU Houston Hobby	4,857	80%	0.5%
28	TPA Tampa	7,121	80%	1.3%
29	ORD Chicago O'Hare	26,440	80%	0.4%
30	RDU Raleigh-Durham	5,094	80%	0.7%
31	MSY New Orleans	4,362	80%	0.8%
32	BOS Boston Logan	11,745	80%	1.0%
33	DCA Washington Reagan National	11,833	80%	0.7%
34	MDW Chicago Midway	6,791	79%	0.3%
35	JFK New York JFK	10,152	79%	1.0%
36	LAS Las Vegas Harry Reid	15,659	79%	0.3%
37	SAN San Diego	7,727	79%	0.4%
38	MCO Orlando	14,178	78%	1.1%
39	AUS Austin-Bergstrom	7,402	78%	0.5%
40	IAH Houston Bush Intercontinental	13,441	78%	0.5%
41	EWR Newark	12,003	78%	1.4%
42	DEN Denver	25,467	77%	0.4%
43	MIA Miami	9,590	76%	0.8%
44	DAL Dallas Love Field	6,080	76%	0.9%
45	FLL Fort Lauderdale	8,299	76%	0.9%
46	BWI Baltimore/Washington	8,264	75%	0.6%
47	CLT Charlotte Douglas	20,990	75%	0.4%
48	SFO San Francisco	10,865	73%	0.9%
49	DFW Dallas/Fort Worth	25,107	71%	2.3%

Routes need 120+ flights in the month to be ranked (1,707 were). Figures as published by BTS; frozen 2026-08. Method.

April 2024 report

Airlines

Most delayed routes

Most reliable routes

Airports