Reliability rankings

Every ranking below is computed by FlyerIntel from the same source data over the same period, so the comparisons are like for like. Analysis period: July 2023 – June 2026. How scores are calculated

Airports

#	Name	Score	On time	Flights
1	SJC San Jose	82	84.3%	143,157
2	SLC Salt Lake City	80	84.2%	344,932
3	OAK Oakland	79	82.2%	114,579
4	PDX Portland	78	83.4%	181,329
5	LAX Los Angeles	74	81.6%	577,699
6	SEA Seattle	74	79.4%	493,992
7	PHX Phoenix	73	80.6%	582,422
8	MSP Minneapolis	72	81.2%	358,791
9	LAS Las Vegas	69	78.2%	555,302
10	IAD Washington	68	81.2%	164,950
11	SFO San Francisco	68	79.1%	421,938
12	STL St. Louis	68	79.3%	192,925
13	SAN San Diego	67	78.3%	288,323
14	ATL Atlanta	67	79.1%	984,179
15	BNA Nashville	66	78.7%	309,547
16	DTW Detroit	66	79.7%	378,183
17	MDW Chicago	66	76.7%	233,206
18	AUS Austin	65	78.2%	264,344
19	DEN Denver	64	76.2%	933,596
20	MSY New Orleans	64	78.9%	150,520
21	BWI Baltimore	63	76.1%	290,693
22	RDU Raleigh–Durham	62	79.6%	175,148
23	TPA Tampa	60	78.4%	236,522
24	IAH Houston	60	77.6%	349,206
25	BOS Boston	59	77.4%	427,616
26	JFK New York	56	77.3%	342,450
27	CLT Charlotte	56	75.1%	602,695
28	MCO Orlando	56	75.0%	485,085
29	PHL Philadelphia	55	76.6%	295,169
30	EWR Newark	54	77.8%	377,505
31	LGA New York	54	78.5%	445,298
32	MIA Miami	53	73.4%	331,265
33	ORD Chicago	53	74.6%	919,792
34	DCA Washington	52	76.9%	422,961
35	FLL Fort Lauderdale	52	72.8%	271,530
36	DFW Dallas–Fort Worth	49	73.3%	933,095

Airlines

#	Name	Score	On time	Flights
1	HA Hawaiian Airlines	80	83.7%	199,679
2	DL Delta Air Lines	72	82.3%	3,052,362
3	WN Southwest Airlines	71	78.5%	4,246,645
4	AS Alaska Airlines	71	78.9%	782,050
5	UA United Airlines	67	79.9%	2,344,539
6	G4 Allegiant Air	58	75.9%	368,181
7	NK Spirit Airlines	54	75.5%	635,598
8	AA American Airlines	52	75.1%	2,930,179
9	B6 JetBlue	47	72.8%	722,180
10	F9 Frontier Airlines	46	72.0%	608,753

Most reliable routes

Routes between covered airports with at least 750 flights.

#	Name	Score	On time	Flights
1	SJC→LAX San Jose to Los Angeles	88	87.0%	15,203
2	LAX→SJC Los Angeles to San Jose	88	86.5%	15,186
3	LAX→SLC Los Angeles to Salt Lake City	87	88.3%	12,950
4	PDX→LAX Portland to Los Angeles	84	88.0%	13,197
5	SLC→LAX Salt Lake City to Los Angeles	84	85.0%	12,950
6	LAX→PDX Los Angeles to Portland	83	86.9%	13,235
7	PHX→SLC Phoenix to Salt Lake City	83	84.6%	17,312
8	PDX→SEA Portland to Seattle	83	86.0%	15,990
9	SEA→SLC Seattle to Salt Lake City	82	83.7%	11,934
10	SJC→SEA San Jose to Seattle	82	84.1%	13,461
11	LAX→SEA Los Angeles to Seattle	82	85.0%	22,509
12	SJC→PHX San Jose to Phoenix	81	84.4%	9,361
13	SFO→IAH San Francisco to Houston	81	84.5%	10,033
14	PHX→LAX Phoenix to Los Angeles	80	83.2%	21,885
15	PHX→SEA Phoenix to Seattle	80	82.8%	21,737
16	BNA→ATL Nashville to Atlanta	80	85.9%	11,821
17	SLC→PHX Salt Lake City to Phoenix	79	83.8%	17,331
18	PHX→MSP Phoenix to Minneapolis	79	84.4%	9,695
19	SEA→LAX Seattle to Los Angeles	79	82.8%	22,513
20	STL→ATL St. Louis to Atlanta	79	85.3%	10,709
21	MSP→ATL Minneapolis to Atlanta	79	83.2%	10,845
22	SLC→SEA Salt Lake City to Seattle	79	81.0%	11,934
23	SEA→PDX Seattle to Portland	78	80.8%	15,623
24	SEA→SJC Seattle to San Jose	78	81.7%	13,449
25	ATL→MSP Atlanta to Minneapolis	78	82.0%	10,857

Least reliable routes

#	Name	Score	On time	Flights
1	DFW→MCO Dallas–Fort Worth to Orlando	34	66.0%	14,843
2	DFW→SFO Dallas–Fort Worth to San Francisco	37	65.0%	12,284
3	DFW→BNA Dallas–Fort Worth to Nashville	37	68.4%	10,390
4	CLT→EWR Charlotte to Newark	37	71.4%	11,364
5	DFW→SAN Dallas–Fort Worth to San Diego	39	66.7%	10,622
6	FLL→BOS Fort Lauderdale to Boston	40	68.7%	9,805
7	RDU→LGA Raleigh–Durham to New York	40	75.2%	10,100
8	DFW→IAH Dallas–Fort Worth to Houston	40	71.5%	16,451
9	ORD→EWR Chicago to Newark	40	72.0%	17,938
10	BOS→FLL Boston to Fort Lauderdale	41	68.7%	9,831
11	IAH→DFW Houston to Dallas–Fort Worth	41	73.3%	16,462
12	DCA→LGA Washington to New York	41	74.3%	13,818
13	DFW→EWR Dallas–Fort Worth to Newark	41	73.2%	10,658
14	BNA→DFW Nashville to Dallas–Fort Worth	42	73.6%	10,389
15	FLL→JFK Fort Lauderdale to New York	42	72.0%	11,639
16	ORD→LGA Chicago to New York	42	73.7%	32,929
17	CLT→LGA Charlotte to New York	42	72.4%	15,532
18	EWR→BOS Newark to Boston	43	74.4%	11,899
19	DFW→AUS Dallas–Fort Worth to Austin	43	70.7%	14,530
20	MCO→DFW Orlando to Dallas–Fort Worth	43	71.7%	14,838
21	DFW→LAS Dallas–Fort Worth to Las Vegas	43	69.0%	17,276
22	MIA→EWR Miami to Newark	43	72.7%	12,502
23	ATL→EWR Atlanta to Newark	43	73.0%	18,137
24	MIA→LGA Miami to New York	43	71.5%	17,469
25	DFW→BOS Dallas–Fort Worth to Boston	43	70.4%	11,685

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026