Air Canada
Is AC4378 delayed?
Service date: · Scheduled arrival date; departure time unavailable (America/Los_Angeles)
Arrived
20 min late
Official source · Updated
Departure
Boise
BOI
Scheduled
Not available
Arrival
San Francisco
SFO
Actual
Scheduled 09:18
Sep 16
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Not available
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
Operating flight: UAL4639
BOISFO
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 20 min late
BOI → SFO
- 22 min early
BOI → SFO
- 26 min early
BOI → SFO
- 22 min early
BOI → SFO
- 20 min early
BOI → SFO
Flight history and details
Aug 17, 2026 — Sep 16, 2026
- Observed arrivals
- 13
- Arrivals over 15 minutes late
- 4
- Observed cancellations
- 0
- Observed occurrences
- 13
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 16, 2026Arrived | Boise | San Francisco | 20 | |
| Sep 15, 2026Arrived | Boise | San Francisco | -22 | |
| Sep 14, 2026Arrived | Boise | San Francisco | -26 | |
| Sep 13, 2026Arrived | Boise | San Francisco | -22 | |
| Sep 12, 2026Arrived | Boise | San Francisco | -20 | |
| Sep 11, 2026Arrived | Boise | San Francisco | 37 | |
| Sep 10, 2026Arrived | Boise | San Francisco | -25 | |
| Sep 9, 2026Arrived | Boise | San Francisco | 6 | |
| Sep 8, 2026Arrived | Boise | San Francisco | -25 | |
| Sep 7, 2026Arrived | Boise | San Francisco | 17 | |
| Sep 6, 2026Arrived | Boise | San Francisco | -1 | |
| Sep 5, 2026Arrived | Boise | San Francisco | 43 | |
| Sep 4, 2026Arrived | Boise | San Francisco | -10 |