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United Airlines

Is UA2478 delayed?

Each route and date is shown separately. Confirm that both airports match your booking.

Service date: · Scheduled departure date (America/Los_Angeles)

DepartedLast reported

14 min early

This update may be out of date. Check with your airline.

Official source · Updated

Departure

San Francisco

SFO

Actual

Scheduled 18:54

Sep 18

Arrival

Ontario

ONT

Scheduled

Sep 19

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Not available
Actual
Not available

Service date: · Scheduled departure date (America/Los_Angeles)

Arrived

26 min late

Official source · Updated

Departure

Seattle

SEA

Actual

Scheduled 15:47

Sep 18

Arrival

San Francisco

SFO

Actual

Scheduled 17:40

Sep 18

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: Seattle → San FranciscoSEASFO
Route overview

Recent arrivals

Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.

  • SEA → SFO

    27 min early

  • SFO → ONT

    23 min early

  • SEA → SFO

    29 min early

  • SEA → SFO

    44 min late

  • SEA → SFO

    69 min late
Flight history and details

Aug 25, 2026 — Sep 24, 2026

Observed arrivals
44
Arrivals over 15 minutes late
13
Observed cancellations
0
Observed occurrences
59

Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.

How flight status works

UA2478 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 23, 2026ArrivedSeattleSan Francisco
-27
Sep 22, 2026ArrivedSan FranciscoOntario
-23
Sep 22, 2026ArrivedSeattleSan Francisco
-29
Sep 21, 2026ArrivedSeattleSan Francisco
44
Sep 20, 2026ArrivedSeattleSan Francisco
69
Sep 19, 2026ArrivedSan FranciscoOntario
-8
Sep 19, 2026ArrivedSeattleSan Francisco
-24
Sep 18, 2026ArrivedSeattleSan Francisco
26
Sep 17, 2026ArrivedSeattleSan Francisco
110
Sep 16, 2026ArrivedSeattleSan Francisco
22
Sep 15, 2026ArrivedSan FranciscoOntario
-12
Sep 15, 2026ArrivedSeattleSan Francisco
-12
Sep 14, 2026ArrivedSan FranciscoOntario
-17
Sep 14, 2026ArrivedSeattleSan Francisco
-3
Sep 13, 2026ArrivedSan FranciscoOntario
-12
Sep 13, 2026ArrivedSeattleSan Francisco
-19
Sep 12, 2026ArrivedSan FranciscoOntario
7
Sep 12, 2026ArrivedSeattleSan Francisco
-7
Sep 11, 2026ArrivedSan FranciscoOntario
7
Sep 11, 2026ArrivedSeattleSan Francisco
-29
Sep 10, 2026ArrivedSan FranciscoOntario
-13
Sep 10, 2026ArrivedSeattleSan Francisco
11
Sep 9, 2026ArrivedSan FranciscoOntario
-15
Sep 9, 2026ArrivedSeattleSan Francisco
-16
Sep 8, 2026ArrivedSan FranciscoOntario
-10
Sep 8, 2026ArrivedSeattleSan Francisco
-18
Sep 7, 2026ArrivedSan FranciscoOntario
-16
Sep 7, 2026ArrivedSeattleSan Francisco
-24
Sep 6, 2026ArrivedSan FranciscoOntario
-20
Sep 6, 2026ArrivedSeattleSan Francisco
-30
Sep 5, 2026ArrivedSan FranciscoOntario
-24
Sep 5, 2026ArrivedSeattleSan Francisco
-23
Sep 4, 2026ArrivedSeattleSan Francisco
25
Sep 3, 2026ArrivedSeattleSan Francisco
64
Sep 2, 2026ArrivedSeattleSan Francisco
-14
Sep 1, 2026ArrivedSeattleSan Francisco
57
Aug 31, 2026ArrivedSeattleSan Francisco
24
Aug 30, 2026ArrivedSeattleSan Francisco
-28
Aug 29, 2026ArrivedSeattleSan Francisco
-14
Aug 28, 2026ArrivedSan FranciscoOntario
32
Aug 28, 2026ArrivedSeattleSan Francisco
18
Aug 27, 2026ArrivedSeattleSan Francisco
35
Aug 26, 2026ArrivedSeattleSan Francisco
15
Aug 25, 2026ArrivedSeattleSan Francisco
-26

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