Frontier vs United: Which Airline Is More On Time?

Frontier

routes won

United

175

routes won · leader

vs5ties

Frontier on time: 73.7%
United on time: 80.1%
Frontier cancelled: 1.5%
United cancelled: 0.7%

On the 204 routes both fly · Jun 2025 to May 2026

On the 204 routes both airlines fly, United was more on time on 175, Frontier on 24, and 5 were a tie. On those shared routes, Frontier flights arrived on time 73.7% of the time and United flights 80.1%.

Frontier's biggest wins

DEN → CLTDenver to Charlotte+11.2 pts86.9% vs 75.7%
DEN → STLDenver to St Louis+10.7 pts89.0% vs 78.3%
DEN → GRRDenver to Grand Rapids+10.4 pts85.7% vs 75.3%
FAR → DENFargo to Denver+7.2 pts75.7% vs 68.4%
DEN → FARDenver to Fargo+6.9 pts81.7% vs 74.9%

United's biggest wins

LAX → MCOLos Angeles to Orlando+40.1 pts88.3% vs 48.3%
SFO → ATLSan Francisco to Atlanta+27.7 pts85.4% vs 57.8%
SFO → ONTSan Francisco to Ontario+25.7 pts80.1% vs 54.5%
SFO → PHXSan Francisco to Phoenix+25.2 pts81.9% vs 56.7%
FLL → CLEFort Lauderdale to Cleveland+23.8 pts92.2% vs 68.4%

Every shared route

Busiest first. Tap a route for every flight on it and the most on-time departure.

Route	Frontier	United	More on time
DEN → IAHDenver to Houston	79.1%778 flights	77.7%3,854 flights	Frontier
IAH → DENHouston to Denver	81.2%778 flights	81.2%3,854 flights	Tie
IAH → ORDHouston to Chicago	61.1%233 flights	78.2%3,981 flights	United
ORD → IAHChicago to Houston	76.2%234 flights	78.3%3,973 flights	United
ORD → DENChicago to Denver	73.5%331 flights	77.6%3,701 flights	United
DEN → ORDDenver to Chicago	68.3%328 flights	71.3%3,701 flights	United
SFO → LAXSan Francisco to Los Angeles	67.5%387 flights	80.1%3,587 flights	United
LAX → SFOLos Angeles to San Francisco	53.7%387 flights	69.7%3,583 flights	United
DEN → LASDenver to Las Vegas	76.1%1,483 flights	78.5%2,458 flights	United
LAS → DENLas Vegas to Denver	78.6%1,480 flights	82.8%2,454 flights	United
DEN → SFODenver to San Francisco	71.2%565 flights	73.0%3,367 flights	United
SFO → DENSan Francisco to Denver	76.0%565 flights	82.1%3,364 flights	United
LAX → DENLos Angeles to Denver	81.9%731 flights	86.5%3,062 flights	United
DEN → LAXDenver to Los Angeles	80.4%731 flights	84.8%3,059 flights	United
DEN → PHXDenver to Phoenix	76.5%1,401 flights	79.9%2,379 flights	United
PHX → DENPhoenix to Denver	79.9%1,394 flights	83.1%2,380 flights	United
DEN → SLCDenver to Salt Lake City	80.6%995 flights	78.3%2,733 flights	Frontier
SLC → DENSalt Lake City to Denver	77.0%996 flights	80.0%2,731 flights	United
IAH → LAXHouston to Los Angeles	69.8%332 flights	83.7%3,394 flights	United
LAX → IAHLos Angeles to Houston	63.8%332 flights	86.7%3,394 flights	United
ORD → LAXChicago to Los Angeles	66.4%250 flights	77.5%3,396 flights	United
LAX → ORDLos Angeles to Chicago	60.6%248 flights	80.9%3,394 flights	United
SFO → LASSan Francisco to Las Vegas	67.7%873 flights	80.9%2,733 flights	United
LAS → SFOLas Vegas to San Francisco	65.8%866 flights	70.6%2,733 flights	United
DEN → DFWDenver to Dallas-Fort Worth	75.2%1,082 flights	76.7%1,943 flights	United
DFW → DENDallas-Fort Worth to Denver	78.3%1,083 flights	74.3%1,942 flights	Frontier
MCO → IAHOrlando to Houston	82.4%515 flights	83.3%2,481 flights	United
IAH → MCOHouston to Orlando	69.9%515 flights	84.5%2,480 flights	United
IAH → LASHouston to Las Vegas	69.5%291 flights	83.6%2,607 flights	United
LAS → IAHLas Vegas to Houston	78.9%291 flights	85.2%2,606 flights	United
SAN → DENSan Diego to Denver	79.4%718 flights	83.9%2,090 flights	United
DEN → SANDenver to San Diego	78.5%717 flights	80.0%2,090 flights	United
SAN → SFOSan Diego to San Francisco	49.7%188 flights	72.8%2,608 flights	United
SFO → SANSan Francisco to San Diego	60.3%188 flights	76.6%2,608 flights	United
MCO → ORDOrlando to Chicago	72.2%360 flights	75.9%2,426 flights	United
ORD → MCOChicago to Orlando	70.7%359 flights	79.2%2,426 flights	United
EWR → ATLNewark to Atlanta	70.8%709 flights	77.4%2,041 flights	United
ATL → EWRAtlanta to Newark	63.7%709 flights	78.8%2,040 flights	United
DEN → MCODenver to Orlando	74.0%815 flights	81.8%1,780 flights	United
MCO → DENOrlando to Denver	82.1%813 flights	84.8%1,777 flights	United
LAS → ORDLas Vegas to Chicago	67.5%172 flights	80.0%2,332 flights	United
ORD → LASChicago to Las Vegas	57.3%174 flights	79.8%2,330 flights	United
AUS → DENAustin to Denver	85.5%521 flights	80.7%1,955 flights	Frontier
DEN → AUSDenver to Austin	72.0%521 flights	79.6%1,955 flights	United
IAH → ATLHouston to Atlanta	60.3%738 flights	80.6%1,692 flights	United
ATL → IAHAtlanta to Houston	64.6%738 flights	83.4%1,691 flights	United
ORD → DFWChicago to Dallas-Fort Worth	67.9%429 flights	73.4%1,999 flights	United
DFW → ORDDallas-Fort Worth to Chicago	69.5%426 flights	72.7%1,998 flights	United
SEA → DENSeattle to Denver	74.1%412 flights	86.6%1,906 flights	United
DEN → SEADenver to Seattle	72.1%412 flights	79.4%1,904 flights	United
SNA → SFOSanta Ana to San Francisco	57.6%144 flights	73.9%2,172 flights	United
SFO → SNASan Francisco to Santa Ana	67.9%142 flights	83.9%2,172 flights	United
ORD → ATLChicago to Atlanta	65.6%709 flights	74.4%1,592 flights	United
ATL → ORDAtlanta to Chicago	61.4%706 flights	75.8%1,592 flights	United
MSP → DENMinneapolis to Denver	82.0%608 flights	80.1%1,681 flights	Frontier
DEN → MSPDenver to Minneapolis	70.3%607 flights	81.2%1,679 flights	United
LAS → LAXLas Vegas to Los Angeles	79.8%575 flights	86.4%1,669 flights	United
LAX → LASLos Angeles to Las Vegas	69.1%576 flights	84.2%1,667 flights	United
IAD → MCODulles to Orlando	71.3%272 flights	82.2%1,932 flights	United
MCO → IADOrlando to Dulles	78.9%272 flights	81.9%1,932 flights	United
DEN → LGADenver to New York	61.0%181 flights	73.9%2,013 flights	United
LGA → DENNew York to Denver	62.8%181 flights	77.5%2,012 flights	United
DEN → SNADenver to Santa Ana	86.1%303 flights	84.7%1,870 flights	Frontier
SNA → DENSanta Ana to Denver	83.4%303 flights	84.7%1,869 flights	United
DEN → PDXDenver to Portland	77.5%337 flights	82.1%1,822 flights	United
PDX → DENPortland to Denver	73.7%338 flights	89.6%1,821 flights	United
ORD → PHXChicago to Phoenix	66.0%212 flights	79.9%1,944 flights	United
PHX → ORDPhoenix to Chicago	67.5%212 flights	77.7%1,943 flights	United
IAH → PHXHouston to Phoenix	66.0%265 flights	79.4%1,792 flights	United
PHX → IAHPhoenix to Houston	76.9%265 flights	83.8%1,788 flights	United
DEN → SMFDenver to Sacramento	82.1%164 flights	80.7%1,803 flights	Frontier
SMF → DENSacramento to Denver	82.2%164 flights	87.5%1,802 flights	United
OKC → DENOklahoma City to Denver	75.9%357 flights	79.0%1,591 flights	United
DEN → OKCDenver to Oklahoma City	73.2%357 flights	81.4%1,586 flights	United
DEN → BOIDenver to Boise	77.0%122 flights	79.6%1,820 flights	United
BOI → DENBoise to Denver	74.6%122 flights	82.5%1,817 flights	United
ORD → PHLChicago to Philadelphia	57.6%183 flights	71.9%1,719 flights	United
MCI → DENKansas City to Denver	72.1%245 flights	78.6%1,655 flights	United
DEN → MCIDenver to Kansas City	78.6%245 flights	79.5%1,654 flights	United
PHL → ORDPhiladelphia to Chicago	57.4%183 flights	73.5%1,716 flights	United
DEN → OMADenver to Omaha	70.4%197 flights	79.2%1,655 flights	United
OMA → DENOmaha to Denver	66.5%197 flights	81.2%1,655 flights	United
ATL → IADAtlanta to Dulles	61.3%608 flights	81.4%1,220 flights	United
PHX → SFOPhoenix to San Francisco	71.2%254 flights	75.4%1,573 flights	United
IAD → ATLDulles to Atlanta	67.7%607 flights	81.2%1,219 flights	United
DEN → FSDDenver to Sioux Falls	71.5%165 flights	81.7%1,659 flights	United
FSD → DENSioux Falls to Denver	66.7%165 flights	78.0%1,659 flights	United
SFO → PHXSan Francisco to Phoenix	56.7%254 flights	81.9%1,570 flights	United
LAX → PHXLos Angeles to Phoenix	73.8%481 flights	88.3%1,341 flights	United
PHX → LAXPhoenix to Los Angeles	83.9%482 flights	90.4%1,340 flights	United
DEN → TPADenver to Tampa	81.3%598 flights	81.1%1,187 flights	Tie
TPA → DENTampa to Denver	77.9%599 flights	84.3%1,186 flights	United
DEN → DSMDenver to Des Moines	78.5%149 flights	83.7%1,621 flights	United
DSM → DENDes Moines to Denver	75.2%149 flights	83.0%1,621 flights	United
CLE → MCOCleveland to Orlando	73.0%1,146 flights	88.4%564 flights	United
SLC → SFOSalt Lake City to San Francisco	67.5%159 flights	74.0%1,551 flights	United
MCO → CLEOrlando to Cleveland	74.7%1,145 flights	85.7%563 flights	United
SFO → SLCSan Francisco to Salt Lake City	68.4%159 flights	78.5%1,547 flights	United
DEN → ATLDenver to Atlanta	78.9%710 flights	77.4%992 flights	Frontier
ATL → DENAtlanta to Denver	68.4%704 flights	84.9%992 flights	United
MIA → IAHMiami to Houston	73.2%141 flights	85.0%1,485 flights	United
IAH → MIAHouston to Miami	68.1%140 flights	79.7%1,485 flights	United
ORD → RDUChicago to Raleigh/Durham	64.8%149 flights	78.0%1,443 flights	United
RDU → ORDRaleigh/Durham to Chicago	54.3%149 flights	77.5%1,443 flights	United
TPA → ORDTampa to Chicago	59.0%190 flights	74.7%1,401 flights	United
ORD → TPAChicago to Tampa	63.1%189 flights	79.3%1,401 flights	United
DEN → TUSDenver to Tucson	81.4%104 flights	82.0%1,484 flights	United
TUS → DENTucson to Denver	78.2%104 flights	84.2%1,483 flights	United
DEN → SATDenver to San Antonio	79.4%357 flights	81.0%1,224 flights	United
SAT → DENSan Antonio to Denver	78.1%355 flights	81.2%1,225 flights	United
FLL → ORDFort Lauderdale to Chicago	52.6%121 flights	75.0%1,448 flights	United
ORD → FLLChicago to Fort Lauderdale	66.1%121 flights	79.0%1,447 flights	United
ORD → AUSChicago to Austin	62.8%127 flights	78.4%1,438 flights	United
AUS → ORDAustin to Chicago	62.7%127 flights	74.9%1,437 flights	United
IAH → TPAHouston to Tampa	67.1%161 flights	83.6%1,376 flights	United
TPA → IAHTampa to Houston	68.8%161 flights	86.7%1,375 flights	United
BNA → DENNashville to Denver	75.3%353 flights	79.3%1,160 flights	United
DEN → BNADenver to Nashville	71.1%353 flights	77.9%1,160 flights	United
DEN → STLDenver to St Louis	89.0%264 flights	78.3%1,213 flights	Frontier
STL → DENSt Louis to Denver	76.0%264 flights	76.4%1,213 flights	Tie
DEN → FARDenver to Fargo	81.7%186 flights	74.9%1,245 flights	Frontier
FAR → DENFargo to Denver	75.7%185 flights	68.4%1,243 flights	Frontier
TPA → IADTampa to Dulles	75.3%191 flights	83.1%1,223 flights	United
DEN → ONTDenver to Ontario	78.9%546 flights	77.5%867 flights	Frontier
ONT → DENOntario to Denver	76.5%546 flights	83.4%867 flights	United
IAD → TPADulles to Tampa	67.4%191 flights	81.0%1,221 flights	United
SJU → EWRSJU to Newark	67.2%245 flights	75.9%1,113 flights	United
EWR → SJUNewark to SJU	54.7%244 flights	70.3%1,113 flights	United
DEN → DCADenver to Washington	76.8%985 flights	89.2%365 flights	United
DCA → DENWashington to Denver	78.7%983 flights	78.5%365 flights	Tie
ORD → BWIChicago to Baltimore	65.3%150 flights	70.8%1,161 flights	United
BWI → ORDBaltimore to Chicago	64.3%150 flights	74.0%1,159 flights	United
MIA → DENMiami to Denver	82.4%347 flights	82.5%954 flights	Tie
DEN → MIADenver to Miami	71.8%345 flights	74.5%954 flights	United
CLT → ORDCharlotte to Chicago	60.8%166 flights	76.1%1,122 flights	United
ORD → CLTChicago to Charlotte	64.6%166 flights	70.8%1,122 flights	United
SFO → ONTSan Francisco to Ontario	54.5%161 flights	80.1%1,114 flights	United
ONT → SFOOntario to San Francisco	50.6%161 flights	72.1%1,113 flights	United
PHL → DENPhiladelphia to Denver	68.2%304 flights	84.4%961 flights	United
DEN → PHLDenver to Philadelphia	58.4%302 flights	79.6%960 flights	United
DEN → XNADenver to Fayetteville/Springdale/Rogers	82.7%139 flights	80.2%1,107 flights	Frontier
IAH → CLTHouston to Charlotte	65.8%198 flights	82.1%1,047 flights	United
XNA → DENFayetteville/Springdale/Rogers to Denver	72.5%139 flights	78.9%1,106 flights	United
CLT → IAHCharlotte to Houston	75.0%197 flights	84.1%1,047 flights	United
IAH → RDUHouston to Raleigh/Durham	74.7%184 flights	85.5%1,054 flights	United
RDU → IAHRaleigh/Durham to Houston	69.7%184 flights	85.6%1,054 flights	United
CLE → DENCleveland to Denver	64.2%292 flights	87.4%939 flights	United
DEN → CLEDenver to Cleveland	83.3%293 flights	80.7%938 flights	Frontier
DEN → MSYDenver to New Orleans	79.5%188 flights	84.2%1,017 flights	United
DEN → GEGDenver to Spokane	84.3%121 flights	78.0%1,083 flights	Frontier
GEG → DENSpokane to Denver	74.4%121 flights	84.8%1,083 flights	United
LAX → SEALos Angeles to Seattle	80.1%261 flights	87.6%943 flights	United
MSY → DENNew Orleans to Denver	71.4%188 flights	86.4%1,016 flights	United
DEN → LITDenver to Little Rock	72.3%113 flights	78.8%1,090 flights	United
SEA → LAXSeattle to Los Angeles	79.7%261 flights	91.9%942 flights	United
LIT → DENLittle Rock to Denver	72.3%113 flights	74.3%1,089 flights	United
DEN → DTWDenver to Detroit	77.3%446 flights	79.5%728 flights	United
DTW → DENDetroit to Denver	82.4%446 flights	82.9%728 flights	United
DEN → INDDenver to Indianapolis	81.4%285 flights	80.3%861 flights	Frontier
IND → DENIndianapolis to Denver	77.5%285 flights	80.5%861 flights	United
CVG → DENCincinnati / Covington to Denver	82.5%412 flights	85.0%728 flights	United
DEN → CVGDenver to Cincinnati / Covington	74.3%410 flights	81.5%728 flights	United
DFW → IADDallas-Fort Worth to Dulles	90.1%155 flights	84.4%976 flights	Frontier
IAD → DFWDulles to Dallas-Fort Worth	83.3%155 flights	80.2%975 flights	Frontier
RDU → DENRaleigh/Durham to Denver	71.6%280 flights	85.8%806 flights	United
DEN → RDUDenver to Raleigh/Durham	84.0%279 flights	80.4%805 flights	Frontier
CID → DENCedar Rapids to Denver	74.3%169 flights	76.6%910 flights	United
DEN → CIDDenver to Cedar Rapids	77.8%169 flights	78.4%910 flights	United
MCO → LAXOrlando to Los Angeles	79.6%233 flights	85.9%836 flights	United
LAX → MCOLos Angeles to Orlando	48.3%232 flights	88.3%835 flights	United
LAX → SLCLos Angeles to Salt Lake City	84.5%444 flights	90.4%623 flights	United
SLC → LAXSalt Lake City to Los Angeles	87.8%444 flights	88.7%622 flights	United
DEN → ELPDenver to El Paso	82.2%333 flights	78.0%729 flights	Frontier
ELP → DENEl Paso to Denver	80.4%333 flights	82.3%729 flights	United
DEN → MSNDenver to Madison	75.0%141 flights	81.4%910 flights	United
MSN → DENMadison to Denver	63.5%140 flights	81.8%909 flights	United
LAX → SMFLos Angeles to Sacramento	85.3%180 flights	88.2%856 flights	United
SMF → LAXSacramento to Los Angeles	77.7%180 flights	89.6%856 flights	United
SFO → DFWSan Francisco to Dallas-Fort Worth	55.7%174 flights	78.9%821 flights	United
DFW → SFODallas-Fort Worth to San Francisco	64.9%174 flights	75.0%819 flights	United
TPA → CLETampa to Cleveland	76.9%830 flights	84.0%131 flights	United
CLE → TPACleveland to Tampa	76.4%828 flights	93.1%131 flights	United
ATL → SFOAtlanta to San Francisco	65.3%307 flights	79.7%640 flights	United
SFO → ATLSan Francisco to Atlanta	57.8%306 flights	85.4%640 flights	United
CLE → RSWCleveland to Fort Myers	78.0%557 flights	93.4%349 flights	United
RSW → CLEFort Myers to Cleveland	71.3%557 flights	92.8%349 flights	United
CLT → DENCharlotte to Denver	73.9%203 flights	84.1%695 flights	United
DEN → CLTDenver to Charlotte	86.9%202 flights	75.7%695 flights	Frontier
DEN → GRRDenver to Grand Rapids	85.7%147 flights	75.3%729 flights	Frontier
GRR → DENGrand Rapids to Denver	71.9%146 flights	79.8%729 flights	United
DEN → MEMDenver to Memphis	82.2%136 flights	80.0%729 flights	Frontier
MEM → DENMemphis to Denver	70.4%136 flights	80.2%729 flights	United
CLE → FLLCleveland to Fort Lauderdale	74.5%380 flights	90.7%479 flights	United
FLL → CLEFort Lauderdale to Cleveland	68.4%380 flights	92.2%479 flights	United
DEN → TYSDenver to Knoxville/Maryville	79.4%126 flights	77.8%729 flights	Frontier
TYS → DENKnoxville/Maryville to Denver	71.4%126 flights	86.4%729 flights	United
CMH → DENColumbus to Denver	65.2%113 flights	81.5%729 flights	United
DEN → CMHDenver to Columbus	79.5%113 flights	80.1%729 flights	United
IAD → MIADulles to Miami	61.2%156 flights	84.8%512 flights	United
MIA → IADMiami to Dulles	68.4%156 flights	81.3%512 flights	United
IAH → ONTHouston to Ontario	69.5%152 flights	74.9%365 flights	United
ONT → IAHOntario to Houston	74.7%151 flights	89.0%365 flights	United
DEN → PNSDenver to Pensacola	77.4%210 flights	80.1%242 flights	United
PNS → DENPensacola to Denver	63.3%210 flights	73.1%242 flights	United

Across their whole networks

Frontier is #7 on the airline on-time leaderboard (72.5% on time, 1.9% cancelled, 202,286 flights); United is #1 (78.2% on time, 1.6% cancelled, 1,503,166 flights).

More matchups

American vs United Frontier vs Southwest American vs Frontier Southwest vs United Delta vs Frontier Delta vs United Alaska vs United Frontier vs JetBlue Alaska vs Frontier JetBlue vs United

Historical results, not a guarantee. Source: US DOT Bureau of Transportation Statistics marketing-carrier on-time reports, Jun 2025 to May 2026. United includes United Express. ATIS Alerts is not affiliated with any airline.

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