| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Mar 28 | SDF | IAD | 09:53 | 10:55 |
Landed
|
Track > |
| Mar 27 | SDF | IAD | 10:05 | 11:18 |
Landed
|
Track > |
| Mar 26 | SDF | IAD | 09:51 | 10:58 |
Landed
|
Track > |
| Mar 25 | SDF | IAD | 10:07 | 11:20 |
Landed
|
Track > |
| Mar 24 | SDF | IAD | 10:02 | 11:11 |
Landed
|
Track > |
| Mar 23 | SDF | IAD | 10:14 | 11:26 |
Landed
|
Track > |
| Mar 22 | SDF | IAD | 09:58 | 11:07 |
Landed
|
Track > |
| Mar 21 | SDF | IAD | 10:01 | 11:17 |
Landed
|
Track > |
| Mar 20 | SDF | IAD | 09:54 | 11:07 |
Landed
|
Track > |
| Mar 19 | SDF | IAD | 09:57 | 11:07 |
Landed
|
Track > |
United Airlines Flight UA4021 connects Louisville, United States to Washington, United States, taking off from Louisville International Airport SDF and landing at Washington Dulles International Airport IAD.
How long is the UA4021 flight from Louisville to Washington?
The average flight time from Louisville to Washington is 1 hour and 10 minutes. The flight distance is 724 km / 450 miles and the average flight speed is 619 km/h / 385 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA4021 Louisville to Washington?
The Airportia On-Time Performance Rating for United Airlines Flight UA4021 is 5/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA4021 arriving at?
Flight UA4021 arrives at Washington Dulles International Airport (IAD) Terminal 3.
When was the latest UA4021 flight?
The latest flight took off on Saturday, March 28th, 2026 with the flight status being Landed on 10:55.
How else can the flight UA4021 be referenced as?
This United Airlines flight can also be referenced as UAL4021, UA 4021, UAL 4021.
How often is flight UA4021 delayed?
On average, 0% of all UA4021 flights are delayed. The average delay is 0 minutes.
Can I get compensation for my delayed or cancelled UA4021 flight or baggage issues?
If your UA4021 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our UA4021 Flight Tracker above for more details.
Flight UA4021 is code-shared by 2 airlines using the flight numbers AC4428, CM2673
Other flights departing from Louisville SDF: UA295, AA5214, AA3138, WN733
Other flights arriving at Washington IAD: UA274, UA6211, UA4239, UA567
All flights connecting Louisville SDF to Washington IAD.