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United Airlines

Is UA1665 delayed?

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

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

Arrived

23 min early

Official source · Updated

Departure

San Francisco

SFO

Actual

Scheduled 23:41

Sep 14

Arrival

Boston

BOS

Actual

Scheduled 08:09

Sep 15

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Not available
Actual

Service date: · Scheduled departure date (UTC)

Arrived

14 min late

Official source · Updated

Departure

Ontario

ONT

Actual

Scheduled 02:30

Sep 14

Arrival

San Francisco

SFO

Actual

Scheduled 20:50

Sep 13

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: San Francisco → BostonSFOBOS
Route overview

Recent arrivals

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

  • SFO → BOS

    27 min early

  • SFO → BOS

    42 min early

  • SFO → BOS

    17 min early

  • ONT → SFO

    16 min late

  • SFO → BOS

    12 min early
Flight history and details

Aug 23, 2026 — Sep 22, 2026

Observed arrivals
25
Arrivals over 15 minutes late
3
Observed cancellations
0
Observed occurrences
37

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

UA1665 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 21, 2026ArrivedSan FranciscoBoston
-27
Sep 19, 2026ArrivedSan FranciscoBoston
-42
Sep 18, 2026ArrivedSan FranciscoBoston
-17
Sep 19, 2026ArrivedOntarioSan Francisco
16
Sep 17, 2026ArrivedSan FranciscoBoston
-12
Sep 18, 2026ArrivedOntarioSan Francisco
88
Sep 16, 2026ArrivedSan FranciscoBoston
-42
Sep 15, 2026ArrivedSan FranciscoBoston
-53
Sep 14, 2026ArrivedSan FranciscoBoston
-23
Sep 13, 2026ArrivedSan FranciscoBoston
-43
Sep 14, 2026ArrivedOntarioSan Francisco
14
Sep 12, 2026ArrivedSan FranciscoBoston
-42
Sep 11, 2026ArrivedSan FranciscoBoston
-20
Sep 10, 2026ArrivedSan FranciscoBoston
-30
Sep 9, 2026ArrivedSan FranciscoBoston
-46
Sep 8, 2026ArrivedSan FranciscoBoston
-45
Sep 7, 2026ArrivedSan FranciscoBoston
-14
Sep 8, 2026ArrivedOntarioSan Francisco
-3
Sep 6, 2026ArrivedSan FranciscoBoston
-25
Sep 5, 2026ArrivedSan FranciscoBoston
-43
Sep 4, 2026ArrivedSan FranciscoBoston
-39
Sep 5, 2026ArrivedOntarioSan Francisco
-19
Sep 3, 2026ArrivedSan FranciscoBoston
-4
Sep 3, 2026ArrivedOntarioSan Francisco
31
Sep 2, 2026ArrivedSan FranciscoBoston
-63

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