Routes

FlyerIntel publishes route intelligence where at least 750 flights were operated in the analysis period — enough history to say something meaningful about reliability, best departure times and how carriers compare. Direction matters: a route and its return are analysed separately.

Busiest routes between covered airports

Route	Flights	On time	Score
LAX→SFO Los Angeles to San Francisco	33,701	70.1%	57
SFO→LAX San Francisco to Los Angeles	33,688	77.6%	68
LGA→ORD New York to Chicago	32,930	75.2%	43
ORD→LGA Chicago to New York	32,929	73.7%	42
LAX→JFK Los Angeles to New York	30,234	80.1%	65
JFK→LAX New York to Los Angeles	30,232	80.0%	69
DCA→BOS Washington to Boston	27,810	76.3%	49
BOS→DCA Boston to Washington	27,809	77.5%	54
PHX→DEN Phoenix to Denver	27,770	79.0%	68
DEN→PHX Denver to Phoenix	27,686	76.1%	64
LAX→LAS Los Angeles to Las Vegas	27,594	76.8%	66
LAS→LAX Las Vegas to Los Angeles	27,573	77.7%	69
MCO→ATL Orlando to Atlanta	26,044	74.6%	54
ATL→MCO Atlanta to Orlando	26,030	71.7%	51
ATL→LGA Atlanta to New York	23,931	76.9%	56
LGA→ATL New York to Atlanta	23,926	78.6%	58
DEN→LAS Denver to Las Vegas	23,811	74.5%	61
LAS→DEN Las Vegas to Denver	23,805	77.0%	64
DEN→SLC Denver to Salt Lake City	23,667	77.4%	69
SLC→DEN Salt Lake City to Denver	23,658	77.7%	68
DEN→LAX Denver to Los Angeles	23,079	79.2%	70
LAX→DEN Los Angeles to Denver	23,015	82.9%	76
SEA→LAX Seattle to Los Angeles	22,513	82.8%	79
LAX→SEA Los Angeles to Seattle	22,509	85.0%	82
LGA→BOS New York to Boston	22,279	79.0%	53
BOS→LGA Boston to New York	22,272	81.4%	55
ATL→FLL Atlanta to Fort Lauderdale	22,215	72.2%	53
FLL→ATL Fort Lauderdale to Atlanta	22,210	71.7%	50
LAX→PHX Los Angeles to Phoenix	21,930	81.6%	76
PHX→LAX Phoenix to Los Angeles	21,885	83.2%	80
SEA→PHX Seattle to Phoenix	21,750	79.7%	76
PHX→SEA Phoenix to Seattle	21,737	82.8%	80
ORD→BOS Chicago to Boston	21,109	72.6%	48
BOS→ORD Boston to Chicago	21,098	77.1%	55
DCA→ATL Washington to Atlanta	20,602	80.6%	61
ATL→DCA Atlanta to Washington	20,601	74.2%	53
ORD→LAX Chicago to Los Angeles	20,424	76.5%	61
LAX→ORD Los Angeles to Chicago	20,418	81.1%	68
SFO→JFK San Francisco to New York	20,198	80.8%	68
JFK→SFO New York to San Francisco	20,197	77.3%	64
MCO→EWR Orlando to Newark	20,125	74.2%	44
EWR→MCO Newark to Orlando	20,121	76.5%	52
SEA→SFO Seattle to San Francisco	20,106	69.9%	55
SFO→SEA San Francisco to Seattle	20,101	76.4%	67
DFW→LAX Dallas–Fort Worth to Los Angeles	20,099	72.8%	54
LAX→DFW Los Angeles to Dallas–Fort Worth	20,090	77.2%	57
PHX→LAS Phoenix to Las Vegas	20,030	78.1%	68
LAS→PHX Las Vegas to Phoenix	19,991	79.2%	69
LAS→SAN Las Vegas to San Diego	19,821	69.3%	54
DFW→ORD Dallas–Fort Worth to Chicago	19,786	73.1%	48
ORD→DFW Chicago to Dallas–Fort Worth	19,767	73.0%	48
ATL→DFW Atlanta to Dallas–Fort Worth	19,753	73.2%	48
DFW→ATL Dallas–Fort Worth to Atlanta	19,751	75.3%	53
SAN→LAS San Diego to Las Vegas	19,731	75.4%	60
SEA→DEN Seattle to Denver	19,613	78.3%	70
DEN→SEA Denver to Seattle	19,612	74.9%	65
DFW→LGA Dallas–Fort Worth to New York	19,603	73.5%	45
LGA→DFW New York to Dallas–Fort Worth	19,597	74.8%	45
ATL→MIA Atlanta to Miami	19,572	71.7%	51
MIA→ATL Miami to Atlanta	19,564	72.2%	51
DCA→ORD Washington to Chicago	19,524	79.2%	56
ORD→DCA Chicago to Washington	19,515	73.1%	47
ATL→TPA Atlanta to Tampa	19,404	74.1%	55
TPA→ATL Tampa to Atlanta	19,389	78.7%	62
SAN→SFO San Diego to San Francisco	19,381	67.6%	49
SFO→SAN San Francisco to San Diego	19,294	72.1%	57
ORD→DEN Chicago to Denver	18,950	77.0%	62
DEN→ORD Denver to Chicago	18,922	74.4%	57
SEA→LAS Seattle to Las Vegas	18,738	77.7%	71
LAS→SEA Las Vegas to Seattle	18,723	80.1%	74
DEN→DFW Denver to Dallas–Fort Worth	18,322	74.7%	52
DFW→DEN Dallas–Fort Worth to Denver	18,317	70.6%	45
DEN→MSP Denver to Minneapolis	18,262	77.6%	68
MSP→DEN Minneapolis to Denver	18,232	79.6%	71
EWR→ATL Newark to Atlanta	18,141	75.8%	50
ATL→EWR Atlanta to Newark	18,137	73.0%	43
ORD→ATL Chicago to Atlanta	17,986	75.8%	56
ATL→ORD Atlanta to Chicago	17,984	74.3%	54
ORD→EWR Chicago to Newark	17,938	72.0%	40
EWR→ORD Newark to Chicago	17,929	73.7%	46
ORD→MSP Chicago to Minneapolis	17,746	73.3%	53
MSP→ORD Minneapolis to Chicago	17,742	75.5%	56
SFO→LAS San Francisco to Las Vegas	17,715	73.7%	58
LAS→SFO Las Vegas to San Francisco	17,713	67.2%	50
ATL→BWI Atlanta to Baltimore	17,650	75.9%	59
DEN→ATL Denver to Atlanta	17,593	78.7%	69
ATL→DEN Atlanta to Denver	17,571	77.2%	66
BWI→ATL Baltimore to Atlanta	17,567	79.1%	65
LGA→MIA New York to Miami	17,489	74.3%	47
MIA→LGA Miami to New York	17,469	71.5%	43
ORD→PHX Chicago to Phoenix	17,440	78.1%	64
PHX→ORD Phoenix to Chicago	17,424	80.2%	69
ATL→PHL Atlanta to Philadelphia	17,345	75.1%	56
PHL→ATL Philadelphia to Atlanta	17,339	78.9%	63
SLC→PHX Salt Lake City to Phoenix	17,331	83.8%	79
PHX→SLC Phoenix to Salt Lake City	17,312	84.6%	83
LAS→DFW Las Vegas to Dallas–Fort Worth	17,278	78.3%	56
DFW→LAS Dallas–Fort Worth to Las Vegas	17,276	69.0%	43
PHX→SAN Phoenix to San Diego	17,172	76.4%	66
SAN→PHX San Diego to Phoenix	17,156	78.0%	65
PHL→MCO Philadelphia to Orlando	17,040	73.0%	46
MCO→PHL Orlando to Philadelphia	17,037	72.6%	45
SAN→DEN San Diego to Denver	16,971	79.1%	69
DEN→SAN Denver to San Diego	16,924	75.9%	65
ORD→DTW Chicago to Detroit	16,891	76.6%	54
DTW→ORD Detroit to Chicago	16,884	77.8%	57
BOS→JFK Boston to New York	16,853	77.3%	51
JFK→BOS New York to Boston	16,852	75.1%	45
ORD→MCO Chicago to Orlando	16,695	75.4%	56
MCO→ORD Orlando to Chicago	16,679	73.9%	52
SFO→DEN San Francisco to Denver	16,605	76.7%	67
DEN→SFO Denver to San Francisco	16,595	68.5%	51
ORD→IAH Chicago to Houston	16,464	77.0%	62
IAH→DFW Houston to Dallas–Fort Worth	16,462	73.3%	41
IAH→ORD Houston to Chicago	16,460	77.1%	59
DFW→IAH Dallas–Fort Worth to Houston	16,451	71.5%	40
SJC→SAN San Jose to San Diego	16,368	77.0%	70
SAN→SJC San Diego to San Jose	16,223	78.5%	72
IAH→LAX Houston to Los Angeles	16,077	82.8%	74
LAX→IAH Los Angeles to Houston	16,063	85.4%	78

Source: FlyerIntel analysis of US DOT BTS data · 36 months through June 2026

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