UA639 United Airlines - Flight Status
Below, you can find details about United Airlines flight UA639, which currently operates between the airports of San Francisco - San Francisco International Airport (Airport Code SFO) and San Antonio - San Antonio International Airport (Airport Code SAT).
This flight data pertains specifically to the flight's details for Wednesday, September 16, 2026.
Table of contents:
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA639
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA639
UA639 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
UA639 United Airlines to San Antonio
En Route - On-time
Delay: 11 minutes
Flight Status for Wednesday September 16, 2026
En Route - On-time
Delay: 11 minutes
Flight Status for Wednesday September 16, 2026
Airline information
United Airlines
Equipment: Airbus A320
Departure
San Francisco (SFO)
September 16, 2026
San Francisco International Airport
Departed at:
12:19 pm
Terminal:
2
Gate:
D14
Scheduled Departure Time: 12:20 pm
Arrival
San Antonio (SAT)
September 16, 2026
San Antonio International Airport
Estimated Arrival Time:
06:07 pm
Terminal:
B
Gate:
B5
Scheduled Arrival Time: 05:56 pm
Baggage: 3
Disclaimer
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Codeshare Flights
This flight is shared with other airlines, this means that these other flights are the same:
- AC4347 - Air Canada
- NZ2373 - Air New Zealand
Additional Information
Which is the frequency of flight UA639?
The flight UA639 is scheduled to flight on Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday on a weekly basis.
Which is the distance of flight UA639?
The distance between the two airports is 1481 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 San Francisco: 2026-09-16 13:17:22
Current Time in San Antonio: 2026-09-16 15:17:22
The flight UA639 is scheduled to flight on Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday on a weekly basis.
Which is the distance of flight UA639?
The distance between the two airports is 1481 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 San Francisco: 2026-09-16 13:17:22
Current Time in San Antonio: 2026-09-16 15:17:22
Alternative Flights
The following airline serve the same route between San Francisco and San Antonio:
United Airlines - Flight Number: UA2281. (On Time performance: 35 - Average Delay: 43 minutes)
United Airlines - Flight Number: UA2281. (On Time performance: 35 - Average Delay: 43 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 March 31, 2026 to September 12, 2026. 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.
Note: We have excluded some days from the graph, since the quantity and quality of the data is not representative enough.
Delays analyzed by Month: It is not possible to calculate the On-Time Performance for this flight accurately by month 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 March 31, 2026 to September 12, 2026. 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: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Last Past Flights UA639
Date
Departure
Arrival
Duration
Aircraft
Status
Saturday
12 September
12 September
12:19 pm
San Francisco (SFO)
San Francisco (SFO)
05:52 pm
San Antonio (SAT)
San Antonio (SAT)
03h 33min
Airbus A320
Airbus A320
Landed - On-time
Wednesday
09 September
09 September
12:22 pm
San Francisco (SFO)
San Francisco (SFO)
06:24 pm
San Antonio (SAT)
San Antonio (SAT)
04h 02min
Airbus A320
Airbus A320
Landed - Delayed