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(UA) United Airlines 639 Flight Tracker
Flight Status
Flight Tracker
ALTITUDE33000 ft
AND CRUISING
Heading107
Speed
519 ktsFlight Time
Total
3h 30m
Elapsed
1h 52m
Remaining
1h 38m
Flight Distance
Total
0
Flown
0
Remaining
0
Past and Upcoming Flights
For flights prior to the results below, please use our Historical Flight Status feature.
12-Sep
09-Sep
10-Sep
11-Sep
12-Sep
13-Sep
14-Sep
15-Sep
Flights for Wednesday, 09-Sep-2026
Departure Time
Origin
Destination
Arrival Time
12:20 PDT
SFO
San Francisco
SAT
San Antonio
17:56 CDT
Flights for Thursday, 10-Sep-2026
Departure Time
Origin
Destination
Arrival Time
18:35 EDT
BOS
Boston
LAX
Los Angeles
21:50 PDT
Flights for Friday, 11-Sep-2026
Departure Time
Origin
Destination
Arrival Time
18:35 EDT
BOS
Boston
LAX
Los Angeles
21:50 PDT
Flights for Saturday, 12-Sep-2026
Departure Time
Origin
Destination
Arrival Time
12:20 PDT
SFO
San Francisco
SAT
San Antonio
17:56 CDT
Flights for Sunday, 13-Sep-2026
Departure Time
Origin
Destination
Arrival Time
18:35 EDT
BOS
Boston
LAX
Los Angeles
21:50 PDT
Flights for Monday, 14-Sep-2026
Departure Time
Origin
Destination
Arrival Time
18:35 EDT
BOS
Boston
LAX
Los Angeles
21:50 PDT
Flights for Tuesday, 15-Sep-2026
No Flight Information Available
According to our data, this flight is not scheduled to fly on this date