| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Aug 18 | ORD | SEA | 07:19 | 09:14 |
Landed
|
Track > |
| Aug 17 | ORD | SEA | 07:24 | 09:14 |
Landed
|
Track > |
| Aug 16 | ORD | SEA | 07:26 | 09:16 |
Landed
|
Track > |
| Aug 15 | ORD | SEA | 07:34 | 09:28 |
Landed
|
Track > |
| Aug 14 | ORD | SEA | 08:43 | 10:42 |
Landed Late
|
Track > |
| Aug 13 | ORD | SEA | 07:26 | 09:15 |
Landed
|
Track > |
| Aug 12 | ORD | SEA | 07:30 | 09:34 |
Landed
|
Track > |
| Aug 11 | ORD | SEA | 07:30 | 09:18 |
Landed
|
Track > |
| Aug 10 | ORD | SEA | 07:38 | 09:45 |
Landed
|
Track > |
| Aug 09 | ORD | SEA | 07:26 | 09:44 |
Landed
|
Track > |
United Airlines Flight UA1643 connects Chicago, United States to Seattle, United States, taking off from Chicago O'Hare International Airport ORD and landing at Seattle Tacoma International Airport SEA.
How long is the UA1643 flight from Chicago to Seattle?
The average flight time from Chicago to Seattle is 3 hours and 57 minutes. The flight distance is 2762 km / 1716 miles and the average flight speed is 699 km/h / 434 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA1643 Chicago to Seattle?
The Airportia On-Time Performance Rating for United Airlines Flight UA1643 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA1643 arriving at?
Flight UA1643 arrives at Seattle Tacoma International Airport (SEA) Terminal B.
When was the latest UA1643 flight?
The latest flight took off on Monday, August 18th, 2025 with the flight status being Landed on 09:14.
How else can the flight UA1643 be referenced as?
This United Airlines flight can also be referenced as UAL1643, UA 1643, UAL 1643.
How often is flight UA1643 delayed?
On average, 10% of all UA1643 flights are delayed. The average delay is 52 minutes.
Can I get compensation for my delayed or cancelled UA1643 flight or baggage issues?
If your UA1643 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 UA1643 Flight Tracker above for more details.
Other flights departing from Chicago ORD: UA1100, UA1832, UA2071, UA5380
Other flights arriving at Seattle SEA: AS745, UA204, AS3412, AS2189
All flights connecting Chicago ORD to Seattle SEA.
