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United Airlines

Is UA2040 delayed?

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

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

Estimated arrivalLast reported

On time

This update may be out of date.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

Update time unavailable

Departure

Chicago

ORD

Actual

Scheduled 21:28

Aug 19

Arrival

San Francisco

SFO

Estimated

Aug 20

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Not available

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

Arrived

18 min early

Updated

Departure

Boston

BOS

Actual

Scheduled 17:01

Aug 19

Arrival

Chicago

ORD

Actual

Scheduled 19:00

Aug 19

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Actual

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: Chicago → San FranciscoORDSFO
Route overview
Route overview: Boston → ChicagoBOSORD
Route overview

Recent arrivals

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

  • BOS → ORD

    79 min late

  • BOS → ORD

    4 min late

  • BOS → ORD

    4 min late

  • BOS → ORD

    20 min early

  • BOS → ORD

    3 min late
Flight history and details

Aug 19, 2026 — Sep 18, 2026

Observed arrivals
34
Arrivals over 15 minutes late
6
Observed cancellations
2
Observed occurrences
46

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

UA2040 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 17, 2026ArrivedBostonChicago
View this flight’s market
79
Sep 16, 2026ArrivedBostonChicago
4
Sep 15, 2026ArrivedBostonChicago
4
Sep 14, 2026ArrivedBostonChicago
-20
Sep 13, 2026ArrivedBostonChicago
3
Sep 12, 2026ArrivedBostonChicago
-30
Sep 11, 2026ArrivedBostonChicago
-24
Sep 10, 2026ArrivedBostonChicago
24
Sep 9, 2026ArrivedBostonChicago
2
Sep 8, 2026ArrivedBostonChicago
-3
Sep 7, 2026ArrivedBostonChicago
-27
Sep 6, 2026ArrivedChicagoSan Francisco
-24
Sep 6, 2026ArrivedBostonChicago
-30
Sep 5, 2026ArrivedBostonChicago
-29
Sep 4, 2026ArrivedChicagoSan Francisco
-26
Sep 4, 2026ArrivedBostonChicago
-11
Sep 3, 2026ArrivedChicagoSan Francisco
-20
Sep 3, 2026ArrivedBostonChicago
11
Sep 2, 2026ArrivedChicagoSan Francisco
-23
Sep 2, 2026ArrivedBostonChicago
53
Sep 1, 2026ArrivedChicagoSan Francisco
-17
Sep 1, 2026ArrivedBostonChicago
-22
Aug 31, 2026ArrivedBostonChicago
139
Aug 30, 2026ArrivedChicagoSan Francisco
-5
Aug 30, 2026ArrivedBostonChicago
48
Aug 29, 2026ArrivedBostonChicago
-37
Aug 28, 2026ArrivedChicagoSan Francisco
25
Aug 28, 2026ArrivedBostonChicago
-5
Aug 27, 2026ArrivedChicagoSan Francisco
-12
Aug 27, 2026ArrivedBostonChicago
-16
Aug 26, 2026ArrivedChicagoSan Francisco
-3
Aug 25, 2026ArrivedChicagoSan Francisco
8
Aug 24, 2026CancelledChicagoNot available
Not available
Aug 23, 2026CancelledChicagoNot available
Not available
Aug 22, 2026ArrivedChicagoSan Francisco
-7
Aug 19, 2026ArrivedBostonChicago
-18

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