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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)

Estimated arrivalLast reported

17 min early

This update may be out of date.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

Update time unavailable

Departure

San Francisco

SFO

Actual

Scheduled 18:30

Aug 19

Arrival

Ontario

ONT

Estimated

Scheduled 03:01

Aug 20

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Not available

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

Arrived

16 min early

Updated

Departure

Seattle

SEA

Actual

Scheduled 15:30

Aug 19

Arrival

San Francisco

SFO

Actual

Scheduled 17:45

Aug 19

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

    110 min late

  • SEA → SFO

    22 min late

  • SFO → ONT

    12 min early

  • SEA → SFO

    12 min early

  • SFO → ONT

    17 min early
Flight history and details

Aug 19, 2026 — Sep 18, 2026

Observed arrivals
41
Arrivals over 15 minutes late
11
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 17, 2026ArrivedSeattleSan Francisco
View this flight’s market
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
Aug 24, 2026ArrivedSeattleSan Francisco
9
Aug 23, 2026ArrivedSeattleSan Francisco
-13
Aug 22, 2026ArrivedSeattleSan Francisco
-13
Aug 21, 2026ArrivedSeattleSan Francisco
17
Aug 19, 2026ArrivedSeattleSan Francisco
-16

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