UA639 Flight Status United Airlines: San Francisco to San Antonio (UAL639)
Are you looking for the November 9th, 2026 UA 639 Boston to Los Angeles flight? Go to our UA639 Boston to Los Angeles Flight Status page >
UA 639 San Francisco to San Antonio Flight Status
Not scheduled today (November 9th, 2026). Latest flight: September 23rd, 2026 ; recent history is in the table below.
UA 639 Flight Status & Schedule United Airlines San Francisco to San Antonio
| Date | From | To | Departure | Arrival | Status | Details |
|---|---|---|---|---|---|---|
| Sep 23 | SFO | SAT | 13:22 | 18:39 | Landed Late | Track > |
| Sep 19 | SFO | SAT | 13:15 | 18:14 | Landed Late | Track > |
| Sep 16 | SFO | SAT | 12:53 | 17:57 | Landed | Track > |
| Sep 12 | SFO | SAT | 12:42 | 17:47 | Landed | Track > |
| Sep 09 | SFO | SAT | 13:12 | 18:22 | Landed Late | Track > |
United Airlines' San Francisco–San Antonio flight covers 2,381 km (1,480 mi). Its timetable allows 3 h 36 min; in practice it usually takes about 3 h 5 min, so it often makes up time. It is not flying today; the last flight, on 23 September 2026, landed 43 minutes late.
About UA 639
- Distance
- 2,381 km (1,480 mi)
- Typical flight time
- 3 h 5 min
- On time
- 2 of the last 5
- Average delay when late
- 29 min
- Usually departs from
- Terminal 2
UA 639 FAQ
- How long is the UA639 flight?
- The timetable allows 3 h 36 min. San Francisco to San Antonio is 2,381 km (1,480 mi).
- How often is UA639 late?
- 3 of the last 5 flights arrived 15 or more minutes late; when late, by 29 minutes on average.
- Which terminal does UA639 use?
- It usually leaves from Terminal 2 at San Francisco International Airport (SFO) and arrives at Terminal B at San Antonio International Airport (SAT). Check the flight card above for today's terminal and gate.
- What other flight numbers does UA639 have?
- Also listed as UAL639 (United Airlines' ICAO code) and UA 639.
UA639 and San Francisco SFO to San Antonio SAT Flights
Flight UA639 is code-shared by 2 airlines using the flight numbers AC4347, NZ2373
Other flights departing from San Francisco SFO: WN2375, OO6050, OO3385, UA488
Other flights arriving at San Antonio SAT: WN1078, WN1663, WN4653, WN966
All flights connecting San Francisco SFO to San Antonio SAT.