Is UA2478 delayed?
No delay reported — UA2478 is expected in San Francisco at 17:34 on Sep 29, as scheduled.
Usually on time: arrived within 15 min of schedule on 33 of the last 47 flights.
Each route and date is shown separately. Confirm that both airports match your booking.
On time
This update may be out of date. Check with your airline.
Update time unavailable
Departure
Seattle
SEA
Scheduled
Not available
Arrival
San Francisco
SFO
Estimated
Sep 29
Times shown in airport local time
Service date: · Scheduled arrival date; departure time unavailable (America/Los_Angeles)
Think UA2478 runs late today? Delayed is trading at 35¢ — pays out x2.84.
Will United Airlines UA 2478 from Seattle to San Francisco arrive on time, be delayed, or be cancelled on Sep 29?Flight details
Departure · UTC
- Scheduled
- Not available
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
- Not available
Market prices express trading expectations about a contract’s stated threshold. They do not confirm airline status. The linked market shows its terms and activity.
No live update yet
Showing the published schedule until live times are reported.
Update time unavailable
Departure
San Francisco
SFO
Scheduled
Sep 29
Arrival
Ontario
ONT
Scheduled
Sep 29
Times shown in airport local time
Service date: · Scheduled departure date (America/Los_Angeles)
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Market prices express trading expectations about a contract’s stated threshold. They do not confirm airline status. The linked market shows its terms and activity.
Also sold as NZ9420, CM1446, LX3302, VA8294
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 22 min late
San Francisco → Ontario
- 63 min late
Seattle → San Francisco
- On time
San Francisco → Ontario
- 18 min early
Seattle → San Francisco
- 18 min early
Seattle → San Francisco
Is UA2478 usually late?
Observation window: Aug 30, 2026 – Sep 29, 2026
On time means arriving no more than 15 minutes after the scheduled time; late means more than 15 minutes after. Cancelled and diverted flights are counted apart from arrivals. Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
At the airports today
Seattle (SEA) departures
- Left more than 15 min late
- 157 of 272
- Cancelled today
- 3
San Francisco (SFO) departures
- Left more than 15 min late
- 111 of 306
- Cancelled today
- 2
Related flights
Flight history and details
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 28, 2026Arrived | San Francisco | Ontario | 22 | |
| Sep 28, 2026Arrived | Seattle | San Francisco | 63 | |
| Sep 27, 2026Arrived | San Francisco | Ontario | 0 | |
| Sep 27, 2026Arrived | Seattle | San Francisco | -18 | |
| Sep 26, 2026Arrived | Seattle | San Francisco | -18 | |
| Sep 25, 2026Arrived | San Francisco | Ontario | 36 | |
| Sep 25, 2026Arrived | Seattle | San Francisco | 63 | |
| Sep 24, 2026Arrived | Seattle | San Francisco | 72 | |
| Sep 23, 2026Arrived | San Francisco | Ontario | -19 | |
| Sep 23, 2026Arrived | Seattle | San Francisco | -27 | |
| Sep 22, 2026Arrived | San Francisco | Ontario | -23 | |
| Sep 22, 2026Arrived | Seattle | San Francisco | -29 | |
| Sep 21, 2026Arrived | Seattle | San Francisco | 44 | |
| Sep 20, 2026Arrived | Seattle | San Francisco | 69 | |
| Sep 19, 2026Arrived | San Francisco | Ontario | -8 | |
| Sep 19, 2026Arrived | Seattle | San Francisco | -24 | |
| Sep 18, 2026Arrived | Seattle | San Francisco | 26 | |
| Sep 17, 2026Arrived | Seattle | San Francisco | 110 | |
| Sep 16, 2026Arrived | Seattle | San Francisco | 22 | |
| Sep 15, 2026Arrived | San Francisco | Ontario | -12 | |
| Sep 15, 2026Arrived | Seattle | San Francisco | -12 | |
| Sep 14, 2026Arrived | San Francisco | Ontario | -17 | |
| Sep 14, 2026Arrived | Seattle | San Francisco | -3 | |
| Sep 13, 2026Arrived | San Francisco | Ontario | -12 | |
| Sep 13, 2026Arrived | Seattle | San Francisco | -19 | |
| Sep 12, 2026Arrived | San Francisco | Ontario | 7 | |
| Sep 12, 2026Arrived | Seattle | San Francisco | -7 | |
| Sep 11, 2026Arrived | San Francisco | Ontario | 7 | |
| Sep 11, 2026Arrived | Seattle | San Francisco | -29 | |
| Sep 10, 2026Arrived | San Francisco | Ontario | -13 | |
| Sep 10, 2026Arrived | Seattle | San Francisco | 11 | |
| Sep 9, 2026Arrived | San Francisco | Ontario | -15 | |
| Sep 9, 2026Arrived | Seattle | San Francisco | -16 | |
| Sep 8, 2026Arrived | San Francisco | Ontario | -10 | |
| Sep 8, 2026Arrived | Seattle | San Francisco | -18 | |
| Sep 7, 2026Arrived | San Francisco | Ontario | -16 | |
| Sep 7, 2026Arrived | Seattle | San Francisco | -24 | |
| Sep 6, 2026Arrived | San Francisco | Ontario | -20 | |
| Sep 6, 2026Arrived | Seattle | San Francisco | -30 | |
| Sep 5, 2026Arrived | San Francisco | Ontario | -24 | |
| Sep 5, 2026Arrived | Seattle | San Francisco | -23 | |
| Sep 4, 2026Arrived | Seattle | San Francisco | 25 | |
| Sep 3, 2026Arrived | Seattle | San Francisco | 64 | |
| Sep 2, 2026Arrived | Seattle | San Francisco | -14 | |
| Sep 1, 2026Arrived | Seattle | San Francisco | 57 | |
| Aug 31, 2026Arrived | Seattle | San Francisco | 24 | |
| Aug 30, 2026Arrived | Seattle | San Francisco | -28 |
Email me if UA2478 runs late
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