← November 2024 · January 2025 → · All months

78% of flights arrived on time in December 2024, and 0.7% were cancelled. Hawaiian Airlines was the most punctual airline (84%); JetBlue was the least (68%). The most delayed busy route was LAX → ASE (45% on time).

Airlines

#	Airline	Flights	On time	Year earlier	Cancelled
1	Hawaiian Airlines	6,699	84%	83%	0.5%
2	Southwest Airlines	116,276	80%	82%	0.5%
3	Delta Air Lines	129,853	80%	89%	0.3%
4	United Airlines	118,180	79%	86%	0.8%
5	Alaska Airlines	33,978	77%	82%	1.2%
6	Spirit Airlines	18,662	77%	75%	0.5%
7	American Airlines	159,147	76%	84%	1.0%
8	Frontier Airlines	17,294	75%	77%	0.6%
9	Allegiant Air	11,084	72%	80%	1.4%
10	JetBlue	20,771	68%	71%	1.1%

Most delayed routes

Route	Flights	On time
LAX → ASE	120	45%
BOS → PBI	251	52%
ASE → LAX	120	53%
BOS → SJU	185	54%
EWR → RSW	222	56%
SAN → DAL	137	58%
BOS → RSW	271	58%
PHL → PBI	168	59%
ORD → ALB	151	60%
SAN → AUS	181	60%
JFK → PBI	232	60%
ORD → FAR	171	60%
ROA → CLT	185	61%
DAL → SAN	137	61%
SAN → SFO	598	61%
SAN → BOS	122	61%
SAN → ATL	208	62%
DFW → PDX	220	62%
HPN → PBI	155	63%
DFW → SAN	276	63%

Most reliable routes

Route	Flights	On time
BIL → DEN	123	95%
PHX → PHL	200	95%
PDX → MSP	128	94%
KOA → OGG	124	94%
LAX → OGG	158	92%
SJC → SLC	138	92%
LAX → KOA	137	92%
OGG → LIH	124	92%
BZN → DEN	233	92%
LAS → DTW	255	92%
LAX → DEN	677	91%
COS → DEN	424	91%
TUS → DEN	263	91%
LAX → LIH	137	91%
LIH → OGG	124	91%
OGG → LAX	157	91%
PDX → SJC	268	91%
ABQ → DEN	254	91%
DEN → CPR	186	91%
SAT → ORD	120	91%

Airports

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

#	Airport	Departures	On time	Cancelled
1	HNL Honolulu	5,276	85%	0.5%
2	MCI Kansas City	4,190	84%	0.4%
3	DEN Denver	25,905	84%	0.3%
4	SJC San Jose	4,312	83%	0.9%
5	PDX Portland	6,115	83%	0.3%
6	LAS Las Vegas Harry Reid	15,765	83%	0.4%
7	LAX Los Angeles LAX	16,790	82%	0.4%
8	OAK Oakland	3,260	82%	0.8%
9	PHX Phoenix Sky Harbor	17,449	82%	0.3%
10	SLC Salt Lake City	9,540	82%	0.3%
11	SAT San Antonio	3,519	82%	0.6%
12	CMH John Glenn Columbus	3,698	81%	0.2%
13	IND Indianapolis	3,956	81%	0.3%
14	BNA Nashville	8,159	81%	0.4%
15	STL St. Louis Lambert	5,672	81%	0.4%
16	SNA Orange County John Wayne	3,707	80%	0.9%
17	SMF Sacramento	4,677	80%	0.9%
18	SEA Seattle-Tacoma	14,382	80%	0.7%
19	RDU Raleigh-Durham	5,078	80%	0.4%
20	MDW Chicago Midway	5,949	79%	0.5%
21	MSY New Orleans	4,236	79%	0.4%
22	AUS Austin-Bergstrom	7,013	79%	0.4%
23	BWI Baltimore/Washington	7,910	79%	0.3%
24	TPA Tampa	6,803	78%	0.4%
25	MCO Orlando	13,621	78%	0.4%
26	HOU Houston Hobby	4,633	78%	0.5%
27	CVG Cincinnati Northern Kentucky	3,479	78%	0.7%
28	PIT Pittsburgh	3,553	78%	0.5%
29	ATL Atlanta Hartsfield-Jackson	29,055	78%	0.2%
30	IAH Houston Bush Intercontinental	13,930	78%	1.4%
31	LGA LaGuardia	13,007	78%	0.3%
32	IAD Washington Dulles	7,375	77%	0.5%
33	SFO San Francisco	12,246	77%	0.8%
34	PHL Philadelphia	9,535	77%	0.4%
35	CLE Cleveland Hopkins	3,495	76%	0.6%
36	MSP Minneapolis-St. Paul	10,567	76%	0.6%
37	ORD Chicago O'Hare	26,230	76%	0.5%
38	DTW Detroit Metro	11,241	76%	0.4%
39	DCA Washington Reagan National	11,561	75%	0.9%
40	CLT Charlotte Douglas	21,119	75%	0.4%
41	JFK New York JFK	10,268	75%	0.5%
42	FLL Fort Lauderdale	8,219	74%	0.5%
43	BOS Boston Logan	11,890	74%	1.4%
44	RSW Southwest Florida	3,548	74%	1.3%
45	SJU San Juan	3,517	74%	0.4%
46	DAL Dallas Love Field	6,228	74%	0.7%
47	MIA Miami	9,937	74%	0.5%
48	DFW Dallas/Fort Worth	25,958	73%	2.1%
49	EWR Newark	11,842	73%	0.8%
50	SAN San Diego	8,133	68%	2.5%

Routes need 120+ flights in the month to be ranked (1,789 were). Figures as published by BTS; frozen 2026-08. Method.

December 2024 report

Airlines

Most delayed routes

Most reliable routes

Airports