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United Airlines

Is UA2100 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

22 min early

This update may be out of date.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

Update time unavailable

Departure

San Francisco

SFO

Actual

Scheduled 12:00

Aug 22

Arrival

Kalispell

FCA

Estimated

Scheduled 21:21

Aug 22

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/Phoenix)

Arrived

16 min early

Updated

Departure

Phoenix

PHX

Actual

Scheduled 08:57

Aug 22

Arrival

San Francisco

SFO

Actual

Scheduled 11:05

Aug 22

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: Phoenix → San FranciscoPHXSFO
Route overview

Recent arrivals

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

  • SFO → FCA

    25 min late

  • STL → SFO

    155 min late

  • STL → SFO

    30 min late

  • STL → SFO

    71 min late

  • SFO → FCA

    12 min early
Flight history and details

Aug 21, 2026 — Sep 20, 2026

Observed arrivals
34
Arrivals over 15 minutes late
16
Observed cancellations
0
Observed occurrences
54

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

UA2100 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 19, 2026ArrivedSan FranciscoKalispell
25
Sep 18, 2026ArrivedSt LouisSan Francisco
155
Sep 17, 2026ArrivedSt LouisSan Francisco
30
Sep 16, 2026ArrivedSt LouisSan Francisco
71
Sep 15, 2026ArrivedSan FranciscoKalispell
-12
Sep 14, 2026ArrivedSt LouisSan Francisco
-8
Sep 13, 2026ArrivedSt LouisSan Francisco
19
Sep 12, 2026ArrivedSan FranciscoKalispell
-22
Sep 11, 2026ArrivedSt LouisSan Francisco
61
Sep 10, 2026ArrivedSan FranciscoKalispell
-2
Sep 10, 2026ArrivedSt LouisSan Francisco
12
Sep 9, 2026ArrivedSan FranciscoKalispell
35
Sep 9, 2026ArrivedSt LouisSan Francisco
-2
Sep 8, 2026ArrivedSan FranciscoKalispell
-12
Sep 7, 2026ArrivedSan FranciscoKalispell
75
Sep 7, 2026ArrivedPhoenixSan Francisco
21
Sep 6, 2026ArrivedSan FranciscoKalispell
-12
Sep 6, 2026ArrivedPhoenixSan Francisco
-11
Sep 5, 2026ArrivedSan FranciscoKalispell
-16
Sep 5, 2026ArrivedPhoenixSan Francisco
-9
Sep 4, 2026ArrivedPhoenixSan Francisco
29
Sep 3, 2026ArrivedPhoenixSan Francisco
-7
Sep 2, 2026ArrivedPhoenixSan Francisco
-12
Sep 1, 2026ArrivedPhoenixSan Francisco
86
Aug 31, 2026ArrivedPhoenixSan Francisco
86
Aug 30, 2026ArrivedPhoenixSan Francisco
137
Aug 29, 2026ArrivedPhoenixSan Francisco
-5
Aug 28, 2026ArrivedPhoenixSan Francisco
67
Aug 27, 2026ArrivedPhoenixSan Francisco
-15
Aug 26, 2026ArrivedPhoenixSan Francisco
-14
Aug 25, 2026ArrivedPhoenixSan Francisco
71
Aug 24, 2026ArrivedPhoenixSan Francisco
-9
Aug 23, 2026ArrivedPhoenixSan Francisco
58
Aug 22, 2026ArrivedPhoenixSan Francisco
-16

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