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Delta Air Lines

Is DL4127 delayed?

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

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

Arrived

10 min early

Official source · Updated

Departure

Seattle

SEA

Actual

Scheduled 15:08

Sep 5

Arrival

Boise

BOI

Actual

Scheduled 23:14

Sep 5

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

86 min late

Official source · Updated

Departure

Boise

BOI

Actual

Scheduled 00:01

Sep 5

Arrival

Seattle

SEA

Actual

Scheduled 18:04

Sep 4

Times shown in airport local time

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Not available
Actual

Recent arrivals

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

  • BOI → SEA

    2 min late

  • SEA → BOI

    1 min late

  • BOI → SEA

    12 min early

  • SEA → BOI

    35 min early

  • BOI → SEA

    68 min late
Flight history and details

Aug 18, 2026 — Sep 17, 2026

Observed arrivals
29
Arrivals over 15 minutes late
5
Observed cancellations
0
Observed occurrences
40

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

DL4127 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 17, 2026ArrivedBoiseSeattle
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2
Sep 16, 2026ArrivedSeattleBoise
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1
Sep 16, 2026ArrivedBoiseSeattle
-12
Sep 15, 2026ArrivedSeattleBoise
-35
Sep 15, 2026ArrivedBoiseSeattle
68
Sep 14, 2026ArrivedBoiseSeattle
21
Sep 13, 2026ArrivedSeattleBoise
-25
Sep 13, 2026ArrivedBoiseSeattle
4
Sep 12, 2026ArrivedSeattleBoise
-7
Sep 12, 2026ArrivedBoiseSeattle
12
Sep 11, 2026ArrivedSeattleBoise
-15
Sep 11, 2026ArrivedBoiseSeattle
58
Sep 10, 2026ArrivedSeattleBoise
-10
Sep 10, 2026ArrivedBoiseSeattle
-1
Sep 9, 2026ArrivedBoiseSeattle
8
Sep 8, 2026ArrivedSeattleBoise
-22
Sep 8, 2026ArrivedBoiseSeattle
4
Sep 7, 2026ArrivedSeattleBoise
-23
Sep 7, 2026ArrivedBoiseSeattle
24
Sep 6, 2026ArrivedSeattleBoise
-5
Sep 6, 2026ArrivedBoiseSeattle
-8
Sep 5, 2026ArrivedSeattleBoise
-10
Sep 5, 2026ArrivedBoiseSeattle
86
Sep 4, 2026ArrivedSeattleBoise
-29
Sep 1, 2026ArrivedSeattleBoise
0
Aug 27, 2026ArrivedSeattleBoise
-4
Aug 26, 2026ArrivedSeattleBoise
-23
Aug 22, 2026ArrivedSeattleBoise
-13
Aug 21, 2026ArrivedSeattleBoise
-17

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