United Airlines has an overall on-time arrival rate of 81%. The most common passenger complaint is flight_problems. United Airlines ranks #5 out of 14 U.S. airlines for reliability.
Source: Bureau of Transportation Statistics. Updated July 2026.UA
United Airlines
Lands on time
81%
When late
~71 min
Cancelled
1.0%
Flights tracked
1,539,001
United Airlines is pretty reliable as airlines go. About 81% of their flights land on time. When they don't, you're usually waiting around 71 minutes. The biggest reason? late_aircraft.
About 6.9 out of every 100k passengers file a formal complaint. The thing people complain about most: flight_problems.
Busiest United Airlines routes
LGA → ORDNew York – Chicago
74%on time
ORD → LGAChicago – New York
73%on time
ORD → EWRChicago – Newark
72%on time
EWR → ORDNewark – Chicago
73%on time
IAH → ORDHouston – Chicago
81%on time
ORD → IAHChicago – Houston
80%on time
DEN → IAHDenver – Houston
80%on time
IAH → DENHouston – Denver
82%on time
EWR → MCONewark – Orlando
79%on time
MCO → EWROrlando – Newark
76%on time
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Data last updated July 2026. Source: Bureau of Transportation Statistics.