What is the current status of flight dl3999?

Flight dl3999 has been canceled (status: Canceled). Contact Delta Air Lines or your booking channel for rebooking or refund (updated Sep 22, 2026).

Is flight dl3999 on time today?

Flight dl3999 has been canceled (status: Canceled). Contact Delta Air Lines or your booking channel for rebooking or refund options; if booked on Trip.com, use Manage Booking.

Has flight dl3999 departed yet? What is the departure time?

Flight dl3999 is scheduled to depart at 3:45 PM. The latest actual or estimated departure time is 3:45 PM, and the current status is Canceled (updated Sep 22, 2026).

When is flight dl3999 scheduled to arrive?

Flight dl3999 is scheduled to arrive at 6:46 PM. The latest estimated or actual arrival time is 6:46 PM. Status is Canceled as of Sep 22, 2026.

How can I check real-time status for flight dl3999?

Track flight dl3999 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications.

If flight dl3999 is delayed or canceled, what should I do?

If dl3999 is delayed or canceled, first confirm the latest status here (Canceled, updated Sep 22, 2026). Contact Delta Air Lines or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com.

Has flight dl3999 departed from Santa Ana?

Flight dl3999 has been canceled and did not depart from Santa Ana (SNA). Contact Delta Air Lines or your booking channel for next steps.

Delta Air Lines

DL3999 Flight Status

According to real-time data from Trip.com, flight DL3999, operated by Delta Air Lines and scheduled to fly from Santa Ana (SNA to Seattle (SEA), has been cancelled. Please contact the airline or airport counter for the latest information.

Sat, Sep 19

SNA-SEA

Access more flight status info on the Trip.com app

Canceled

Please refer to the airline for the latest information

Santa Ana(SNA)

Scheduled: 3:45 PM, Sep 19

John Wayne Airport

Seattle(SEA)

Scheduled: 6:46 PM, Sep 19

Seattle-Tacoma International Airport

Check-in Counter

Boarding Gate

Arrival Gate

Baggage

Information provided by VariFlight For real-time updates, please check airport displays or contact your airline.

Trip.com

Flights

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DL3999

DL3999 Aircraft Details

Plane model info unavailable

Punctuality (Departure)

Punctuality (Arrival)

Early on average

Age

Seats

Flight Distance

Economy

In-Flight Services

Unknown

Seat Information

Legroom

Seat width

Reclining Angle

Seat layout example

Flight History for DL3999

Check more records from Trip.com about DL3999 before and after today

Date	Airport		Aircraft Model	Departure	Arrival	Status
Date	Departure	Arrival	Aircraft Model	Departure	Arrival	Status
Wed, Sep 16	Seattle (SEA)	Santa Ana (SNA)	JET	--	--	Canceled
Sat, Sep 19	Santa Ana (SNA)	Seattle (SEA)	JET	--	--	Canceled

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Frequently Asked Questions

What is the current status of flight dl3999?
Flight dl3999 has been canceled (status: Canceled). Contact Delta Air Lines or your booking channel for rebooking or refund (updated Sep 22, 2026).
Is flight dl3999 on time today?
Flight dl3999 has been canceled (status: Canceled). Contact Delta Air Lines or your booking channel for rebooking or refund options; if booked on Trip.com, use Manage Booking.
Has flight dl3999 departed yet? What is the departure time?
Flight dl3999 is scheduled to depart at 3:45 PM. The latest actual or estimated departure time is 3:45 PM, and the current status is Canceled (updated Sep 22, 2026).
When is flight dl3999 scheduled to arrive?
Flight dl3999 is scheduled to arrive at 6:46 PM. The latest estimated or actual arrival time is 6:46 PM. Status is Canceled as of Sep 22, 2026.
How can I check real-time status for flight dl3999?
Track flight dl3999 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications.
If flight dl3999 is delayed or canceled, what should I do?
If dl3999 is delayed or canceled, first confirm the latest status here (Canceled, updated Sep 22, 2026). Contact Delta Air Lines or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com.
Has flight dl3999 departed from Santa Ana?
Flight dl3999 has been canceled and did not depart from Santa Ana (SNA). Contact Delta Air Lines or your booking channel for next steps.