Live tracking not available yet
DL3840 has a schedule in our database but isn't on the airport board right now. Live position data typically appears within a few hours of departure.
Flight Status
Scheduled
Route Info
SEA
Seattle–Tacoma International Airport
Seattle
Scheduled 9:45 AM
ONT
Ontario International Airport
Ontario
T2 Scheduled 12:35 PM
2h 50m flight time
Daily
Recent Flights
No flight history yet
History builds as this flight gets tracked
Schedule
Operating Days
Mo
Tu
We
Th
Fr
Sa
Su
Upcoming
Thu, Mar 19
Fri, Mar 20
Sat, Mar 21
Sun, Mar 22
Mon, Mar 23
Tue, Mar 24
Wed, Mar 25
Schedule valid
May 07 —
Jun 14, 2026