(UA) United Airlines 3666 On-Time Performance Rating

Date Range:

01-Mar-2026 to 30-Apr-2026

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(DCA) Ronald Reagan Washington National Airport

Washington, DC, US

On-Time Performance Chart

(using rounded numbers)

On-Time

82%

Late

Very Late

Excessive

12%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

39.666666666666664

Standard Deviation

45.1

Min

Max

142

UA 3666 On-Time Performance Details

Overall Rating

2.8 of 5

Average

Percentage On-Time 82%

Average Delay Time 39.666666666666664 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.8 shows that this flight has on-time performance characteristics better than 55% of all other flights in the FlightStats database.

On-Time Performance Rating

4.1 of 5

Good

Percentage On-Time 82%

This flight has an on-time performance of 82%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 82% of other flights.

Delay Performance

1.5 of 5

Poor

Average Delay Time 39.666666666666664 min

This flight has an average delay of 39.666666666666664 minutes with a standard deviation of 45.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 31% of other flights.