UA4638 United Airlines - Flight Status
Below, you can find details about United Airlines flight UA4638, which currently operates between the airports of Boise - Boise Air Terminal (Airport Code BOI) and San Francisco - San Francisco International Airport (Airport Code SFO).
This flight data pertains specifically to the flight's details for Thursday, February 12, 2026.
Table of contents:
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA4638
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA4638
UA4638 On Time performance:
n/a
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions. Flight Status
UA4638 United Airlines from Boise
Landed - On-time
Flight Status for Thursday February 12, 2026
Landed - On-time
Flight Status for Thursday February 12, 2026
Airline information
United Airlines
Equipment: Embraer 175 (Enhanced Winglets)
Departure
Boise (BOI)
February 12, 2026
Boise Air Terminal
Departed at:
06:38 am
Terminal:
-
Gate:
B10
Scheduled Departure Time: 06:45 am
Arrival
San Francisco (SFO)
February 12, 2026
San Francisco International Airport
Arrived at:
07:16 am
Terminal:
3
Gate:
F6
Scheduled Arrival Time: 07:50 am
Baggage: 4
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.airport-sfo.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.
Codeshare Flights
This flight is shared with other airlines, this means that these other flights are the same:
- AC3997 - Air Canada
Additional Information
Which is the frequency of flight UA4638?
The flight UA4638 is scheduled to flight on daily basis.
Which is the distance of flight UA4638?
The distance between the two airports is 523 miles.
Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Boise: 2026-02-13 13:25:28
Current Time in San Francisco: 2026-02-13 12:25:28
The flight UA4638 is scheduled to flight on daily basis.
Which is the distance of flight UA4638?
The distance between the two airports is 523 miles.
Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Boise: 2026-02-13 13:25:28
Current Time in San Francisco: 2026-02-13 12:25:28
Alternative Flights
The following airlines serves the same route between Boise and San Francisco:
Alaska Airlines
- Flight Number: AS3025. (On Time performance: 70 - Average Delay: 16 minutes)
United Airlines
- Flight Number: UA4678. (On Time performance: 90 - Average Delay: 21 minutes)
- Flight Number: UA4733. (On Time performance: 86 - Average Delay: 11 minutes)
- Flight Number: UA4753. (On Time performance: 76 - Average Delay: 22 minutes)
- Flight Number: UA5312. (On Time performance: 81 - Average Delay: 33 minutes)
Alaska Airlines
- Flight Number: AS3025. (On Time performance: 70 - Average Delay: 16 minutes)
United Airlines
- Flight Number: UA4678. (On Time performance: 90 - Average Delay: 21 minutes)
- Flight Number: UA4733. (On Time performance: 86 - Average Delay: 11 minutes)
- Flight Number: UA4753. (On Time performance: 76 - Average Delay: 22 minutes)
- Flight Number: UA5312. (On Time performance: 81 - Average Delay: 33 minutes)
Punctuality and delays
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.
Delays analyzed by Weekday: We have gathered available data from last six months, spanning from September 25, 2025 to October 25, 2025. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.
Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from September 25, 2025 to October 25, 2025. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.
Delays analyzed by Weekday: We have gathered available data from last six months, spanning from September 25, 2025 to October 25, 2025. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.
Last Past Flights UA4638
Date
Departure
Arrival
Duration
Aircraft
Status
Thursday
12 February
12 February
06:38 am
Boise (BOI)
Boise (BOI)
07:16 am
San Francisco (SFO)
San Francisco (SFO)
01h 38min
Embraer 175 (E
Embraer 175 (E
Landed - On-time