| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Sep 10 | SFO | LAX | 20:15 | 21:57 |
En-Route
|
Track > |
| Aug 23 | SFO | LAX | 13:39 | 14:33 |
Delayed
|
Track > |
United Airlines Flight UA3900 connects San Francisco, United States to Los Angeles, United States, taking off from San Francisco International Airport SFO and landing at Los Angeles International Airport LAX.
How long is the UA3900 flight from San Francisco to Los Angeles?
The average flight time from San Francisco to Los Angeles is 54 minutes. The flight distance is 543 km / 338 miles and the average flight speed is 462 km/h / 287 mph.
How many UA3900 flights are operated per week?
1 flight per week. The flight UA3900 is operated on Friday.
What is the On-Time Performance (OTP) of United Airlines Flight UA3900 San Francisco to Los Angeles?
The Airportia On-Time Performance Rating for United Airlines Flight UA3900 is 4.5/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest UA3900 flight?
The latest flight took off on Friday, September 11th, 2026 with the flight status being En-Route on 21:57.
How else can the flight UA3900 be referenced as?
This United Airlines flight can also be referenced as UAL3900, UA 3900, UAL 3900.
How often is flight UA3900 delayed?
On average, 50% of all UA3900 flights are delayed. The average delay is 57 minutes.
Can I get compensation for my delayed or cancelled UA3900 flight or baggage issues?
If your UA3900 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 UA3900 Flight Tracker above for more details.
Other flights departing from San Francisco SFO: UA1145, AF81, OO5822, CM409
Other flights arriving at Los Angeles LAX: AF26, DL319, AA1291, AS496
All flights connecting San Francisco SFO to Los Angeles LAX.
