| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| May 20 | BOI | SFO | 09:33 | 10:01 |
Landed Late
|
Track > |
| May 19 | BOI | SFO | 09:59 | 10:17 |
Delayed
|
Track > |
| May 18 | BOI | SFO | 09:37 | 10:02 |
Landed Late
|
Track > |
| May 17 | BOI | SFO | 09:15 | 09:48 |
Landed Late
|
Track > |
| May 16 | BOI | SFO | 09:48 | 10:19 |
Delayed
|
Track > |
| May 15 | BOI | SFO | 09:24 | 09:53 |
Landed Late
|
Track > |
| May 14 | BOI | SFO | 13:16 | 09:30 |
Unknown
|
Track > |
| May 13 | BOI | SFO | 10:25 | 10:55 |
Delayed
|
Track > |
| May 12 | BOI | SFO | 09:33 | 10:04 |
Landed Late
|
Track > |
| May 11 | BOI | SFO | 09:16 | 09:43 |
Landed
|
Track > |
United Airlines Flight UA4639 connects Boise, United States to San Francisco, United States, taking off from Boise Airport BOI and landing at San Francisco International Airport SFO.
How long is the UA4639 flight from Boise to San Francisco?
The average flight time from Boise to San Francisco is 1 hour and 28 minutes. The flight distance is 840 km / 522 miles and the average flight speed is 558 km/h / 347 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA4639 Boise to San Francisco?
The Airportia On-Time Performance Rating for United Airlines Flight UA4639 is 4.4/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA4639 arriving at?
Flight UA4639 arrives at San Francisco International Airport (SFO) Terminal 3.
When was the latest UA4639 flight?
The latest flight took off on Wednesday, May 20th, 2026 with the flight status being Landed on 10:01.
How else can the flight UA4639 be referenced as?
This United Airlines flight can also be referenced as UAL4639, UA 4639, UAL 4639.
How often is flight UA4639 delayed?
On average, 90% of all UA4639 flights are delayed. The average delay is 36 minutes.
Can I get compensation for my delayed or cancelled UA4639 flight or baggage issues?
If your UA4639 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 UA4639 Flight Tracker above for more details.
Flight UA4639 is code-shared by 1 airline using the flight number NH7335
Other flights departing from Boise BOI: WN1428, UA1105, WN4625, SY3010
Other flights arriving at San Francisco SFO: UA5877, UA499, AA4940, AA6378
All flights connecting Boise BOI to San Francisco SFO.