← November 2023 · January 2024 → · All months

84% of flights arrived on time in December 2023, and 0.4% were cancelled. Delta Air Lines was the most punctual airline (89%); JetBlue was the least (71%). The most delayed busy route was FLL → AUS (48% on time).

Airlines

#	Airline	Flights	On time	Year earlier	Cancelled
1	Delta Air Lines	121,097	89%	—	0.4%
2	United Airlines	105,804	86%	—	0.3%
3	American Airlines	144,663	84%	—	0.1%
4	Hawaiian Airlines	6,702	83%	—	1.5%
5	Southwest Airlines	127,773	82%	—	0.6%
6	Alaska Airlines	31,020	82%	—	0.9%
7	Allegiant Air	9,480	80%	—	0.7%
8	Frontier Airlines	15,698	77%	—	0.5%
9	Spirit Airlines	22,583	75%	—	0.4%
10	JetBlue	21,398	71%	—	0.4%

Most delayed routes

Route	Flights	On time
FLL → AUS	121	48%
ANC → FAI	201	59%
FLL → MCO	124	59%
SJU → PHL	132	60%
PHL → SJU	132	61%
FLL → BOS	269	61%
DEN → ASE	229	62%
FAI → ANC	201	63%
BOS → FLL	270	63%
BOS → PBI	180	63%
FLL → CLE	153	63%
FLL → MSY	145	63%
STL → BOS	126	65%
FLL → LAX	190	65%
RDM → SFO	121	65%
DEN → ICT	186	66%
SJU → FLL	175	66%
BWI → ORF	149	66%
BNA → FLL	202	66%
ASE → DEN	227	67%

Most reliable routes

Route	Flights	On time
DCA → MSP	180	98%
MEM → ATL	281	97%
SDF → ATL	244	97%
MSP → SLC	125	97%
DTW → SLC	124	97%
CMH → DFW	123	97%
EWR → CMH	157	96%
LIH → LAX	125	96%
ONT → SJC	123	96%
PNS → ATL	185	96%
ATL → BHM	231	96%
BHM → ATL	231	96%
MSP → LAX	184	96%
ATL → OMA	202	96%
MSP → SEA	202	96%
DTW → SEA	154	95%
CHS → ATL	213	95%
DTW → LAX	210	95%
CLE → ORD	311	95%
KOA → OGG	124	95%

Airports

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

#	Airport	Departures	On time	Cancelled
1	DTW Detroit Metro	10,102	89%	0.2%
2	MSP Minneapolis-St. Paul	10,013	89%	0.5%
3	CVG Cincinnati Northern Kentucky	3,430	88%	0.4%
4	PIT Pittsburgh	3,509	88%	0.4%
5	CMH John Glenn Columbus	3,442	88%	0.5%
6	SMF Sacramento	4,578	88%	0.2%
7	SLC Salt Lake City	9,343	88%	0.1%
8	HNL Honolulu	5,317	87%	1.1%
9	SJC San Jose	4,275	87%	0.3%
10	SNA Orange County John Wayne	3,711	87%	0.6%
11	IAD Washington Dulles	5,921	87%	0.3%
12	ATL Atlanta Hartsfield-Jackson	28,121	87%	0.1%
13	CLE Cleveland Hopkins	3,564	87%	0.5%
14	SAT San Antonio	3,682	86%	0.3%
15	IND Indianapolis	3,670	86%	0.2%
16	PDX Portland	5,547	86%	0.4%
17	EWR Newark	11,568	86%	0.1%
18	LGA LaGuardia	12,665	86%	0.8%
19	SAN San Diego	7,898	85%	0.3%
20	IAH Houston Bush Intercontinental	13,100	85%	0.1%
21	DCA Washington Reagan National	11,241	85%	0.5%
22	MSY New Orleans	4,359	85%	0.3%
23	DAL Dallas Love Field	6,549	84%	0.4%
24	PHX Phoenix Sky Harbor	16,197	84%	0.2%
25	MCI Kansas City	4,204	84%	0.4%
26	HOU Houston Hobby	5,076	84%	0.3%
27	DFW Dallas/Fort Worth	23,890	84%	0.1%
28	ORD Chicago O'Hare	23,581	84%	0.2%
29	AUS Austin-Bergstrom	7,750	84%	0.3%
30	PHL Philadelphia	8,476	84%	0.3%
31	RDU Raleigh-Durham	4,815	83%	0.4%
32	JFK New York JFK	10,413	83%	0.5%
33	SEA Seattle-Tacoma	14,051	83%	0.7%
34	TPA Tampa	7,257	83%	0.3%
35	LAS Las Vegas Harry Reid	15,979	83%	0.2%
36	BNA Nashville	8,351	83%	0.3%
37	CLT Charlotte Douglas	18,994	83%	0.2%
38	BOS Boston Logan	10,759	83%	0.8%
39	STL St. Louis Lambert	5,526	82%	0.4%
40	LAX Los Angeles LAX	16,044	82%	0.2%
41	DEN Denver	26,013	81%	0.4%
42	RSW Southwest Florida	3,617	81%	0.6%
43	MDW Chicago Midway	6,836	80%	2.8%
44	OAK Oakland	3,989	80%	0.9%
45	SFO San Francisco	11,266	79%	0.2%
46	MCO Orlando	15,112	78%	0.3%
47	BWI Baltimore/Washington	8,418	78%	0.6%
48	MIA Miami	9,861	76%	0.1%
49	SJU San Juan	3,057	76%	0.2%
50	FLL Fort Lauderdale	8,440	71%	0.4%

Routes need 120+ flights in the month to be ranked (1,674 were). Figures as published by BTS; frozen 2026-08. Method.

December 2023 report

Airlines

Most delayed routes

Most reliable routes

Airports