DL 4156 — Denver to Seattle
DL 4156 Schedule
Delta Air Lines runs DEN to SEA every day. Scheduled block time is 2h 59m. Typically a Embraer E175.
Embraer E175 (E7W)
Scheduled equipment: Embraer E175. Embraer-built. Registration, build year, and photo fill in the moment the aircraft broadcasts.
DL 4156 Flight Path
Cruise altitude, ground speed, and vertical rate from ADS-B broadcasts. The altitude profile fills in while DL 4156 is airborne, capturing climbs, step-climbs, and descents in real time.
Flight path chart appears once DL 4156 is airborne and broadcasting.
Frequently Asked Questions
If a plane icon is moving on the map, yes. That's ADS-B, the aircraft's own GPS position broadcast, updated every few seconds. No icon means the flight isn't airborne at the moment: either before pushback, already landed, or a day it doesn't operate.
Scheduled equipment is the E7W. The live tracker shows the actual tail and registration when DL 4156 is airborne. Carriers swap aircraft often enough that you'll sometimes see a different airframe than the scheduled type.
Every day of the week. On days outside that pattern this page will show the schedule but no live aircraft.
Scheduled 2h 59m gate to gate from DEN to SEA. Actual air time varies with winds and ATC routing. Tailwinds can shave 15 to 20 minutes on long segments.
GPS-accurate via ADS-B. Typically within 30 meters horizontally, updated every 5 to 10 seconds. If the broadcast drops over oceans or mountainous terrain, the map holds the last-known position and the label changes to reflect the signal gap.
A projection from current position, groundspeed, and remaining distance. It doesn't account for descent procedures, holding, or ATC vectoring near the destination. Trust it within plus or minus 10 minutes once the flight is past the halfway mark.
Delta Air Lines is a skyteam member, so you may see this flight ticketed under a partner airline's code as well. The live aircraft is the same regardless of which code is on your ticket.