| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| May 18 | ORD | STL | 20:18 | 18:53 |
En-Route
|
Track > |
| May 17 | ORD | STL | 18:07 | 18:55 |
Landed
|
Track > |
| May 15 | ORD | STL | 17:34 | 18:22 |
Landed
|
Track > |
| May 14 | ORD | STL | 18:09 | 19:09 |
Landed Late
|
Track > |
| May 13 | ORD | STL | 17:35 | 18:17 |
Landed
|
Track > |
| May 11 | ORD | STL | 17:32 | 18:14 |
Landed
|
Track > |
| May 10 | ORD | STL | 17:44 | 18:29 |
Landed
|
Track > |
| May 06 | ORD | STL | 17:34 | 18:56 |
Unknown
|
Track > |
| May 05 | ORD | STL | 18:26 | 18:44 |
Unknown
|
Track > |
| May 05 | ORD | STL | 17:20 | 19:36 |
Unknown
|
Track > |
United Airlines Flight UA4545 connects Chicago, United States to St. Louis, United States, taking off from Chicago O'Hare International Airport ORD and landing at St. Louis Lambert International Airport STL.
How long is the UA4545 flight from Chicago to St. Louis?
The average flight time from Chicago to St. Louis is 52 minutes. The flight distance is 415 km / 258 miles and the average flight speed is 533 km/h / 331 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA4545 Chicago to St. Louis?
The Airportia On-Time Performance Rating for United Airlines Flight UA4545 is 5/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA4545 arriving at?
Flight UA4545 arrives at St. Louis Lambert International Airport (STL) Terminal 1.
When was the latest UA4545 flight?
The latest flight took off on Monday, May 18th, 2026 with the flight status being En-Route on 18:53.
How else can the flight UA4545 be referenced as?
This United Airlines flight can also be referenced as UAL4545, UA 4545, UAL 4545.
How often is flight UA4545 delayed?
On average, 30% of all UA4545 flights are delayed. The average delay is 7 minutes.
Can I get compensation for my delayed or cancelled UA4545 flight or baggage issues?
If your UA4545 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 UA4545 Flight Tracker above for more details.
Flight UA4545 is code-shared by 3 airlines using the flight numbers AC4936, NH7590, NZ2905
Other flights departing from Chicago ORD: AA3959, AA2323, AA4929, UA2351
Other flights arriving at St. Louis STL: WN1538, WN1753, AA5454, WN3904
All flights connecting Chicago ORD to St. Louis STL.