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United Airlines

Is UA1665 delayed?

No delay reported yet. UA1665 is scheduled to leave San Francisco at 23:44 on Nov 14 and reach Boston at 07:50 (Nov 15) (as of Nov 14, 15:56 UTC).

Usually on time: arrived within 15 min of schedule on 25 of the last 28 flights.

No live update yet

Showing the published schedule until live times come in.

Update time unavailable

Departure

San Francisco

SFO

Scheduled

Nov 14

Arrival

Boston

BOS

Scheduled

Nov 15

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

Route overview: San Francisco → BostonSFOBOS
San Francisco → Boston

Recent arrivals

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

  • San Francisco → Boston

    24 min late

  • San Francisco → Boston

    11 min early

  • San Francisco → Boston

    15 min early

  • San Francisco → Boston

    15 min early

  • San Francisco → Boston

    On schedule (1 min behind)

Is UA1665 usually late?

Period: Oct 15, 2026 – Nov 14, 2026

Arrivals tracked
28
On time
89%
of 28 arrivals
Late
11%
of 28 arrivals
Cancelled
7%
of 30 flights
Median arrival delay
10 min early
9 in 10 arrived within
16 min

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. Compares scheduled and actual arrival times. Cancelled and diverted flights are left out. Some flights may be missing.

How flight status works

At the airports today

San Francisco (SFO) departures

Left more than 15 min late
25 of 46
Cancelled today
41
Flights from San Francisco to Boston today

Boston (BOS) departures

Left more than 15 min late
26 of 52
Cancelled today
53

Related flights

All United Airlines flights

Flight history and details
UA1665 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Nov 13, 2026CancelledSan FranciscoBostonNot availableNot available
Nov 12, 2026ArrivedSan FranciscoBoston24
Nov 11, 2026ArrivedSan FranciscoBoston-11
Nov 10, 2026ArrivedSan FranciscoBoston-15
Nov 9, 2026ArrivedSan FranciscoBoston-15
Nov 8, 2026ArrivedSan FranciscoBoston1
Nov 7, 2026ArrivedSan FranciscoBoston-2
Nov 6, 2026ArrivedSan FranciscoBoston38
Nov 5, 2026ArrivedSan FranciscoBoston-2
Nov 4, 2026ArrivedSan FranciscoBoston3
Nov 3, 2026ArrivedSan FranciscoBoston-7
Nov 2, 2026ArrivedSan FranciscoBoston-9
Nov 1, 2026ArrivedSan FranciscoBoston0
Oct 31, 2026ArrivedSan FranciscoBoston-38
Oct 30, 2026CancelledSan FranciscoBostonNot availableNot available
Oct 29, 2026ArrivedSan FranciscoBoston-17
Oct 28, 2026ArrivedSan FranciscoBoston-13
Oct 27, 2026ArrivedSan FranciscoBoston-4
Oct 26, 2026ArrivedSan FranciscoBoston-9
Oct 25, 2026ArrivedSan FranciscoBoston8
Oct 24, 2026ArrivedSan FranciscoBoston-13
Oct 23, 2026ArrivedSan FranciscoBoston-21
Oct 22, 2026ArrivedSan FranciscoBoston44
Oct 21, 2026ArrivedSan FranciscoBoston-28
Oct 20, 2026ArrivedSan FranciscoBoston-36
Oct 19, 2026ArrivedSan FranciscoBoston-34
Oct 18, 2026ArrivedSan FranciscoBoston-20
Oct 17, 2026ArrivedSan FranciscoBoston-30
Oct 16, 2026ArrivedSan FranciscoBoston-11
Oct 15, 2026ArrivedSan FranciscoBoston13
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