Is DL4031 delayed?
DL4031 left Seattle 33 min early, at 14:52 on Sep 30; its arrival time is not confirmed yet.
Usually on time: arrived within 15 min of schedule on 38 of the last 53 flights.
Each route and date is shown separately. Confirm that both airports match your booking.
33 min early
This update may be out of date. Check with your airline.
Update time unavailable
Departure
Seattle
SEA
Actual
Scheduled 15:26
Sep 30
Arrival
Ontario
ONT
Scheduled
Sep 30
Times shown in airport local time
Service date: · Scheduled departure date (America/Los_Angeles)
In the air. The market on this flight settles on the airport’s recorded arrival.
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Market prices express trading expectations about a contract’s stated threshold. They do not confirm airline status. The linked market shows its terms and activity.
No live update yet
Showing the published schedule until live times are reported.
Update time unavailable
Departure
Ontario
ONT
Scheduled
Sep 30
Arrival
Seattle
SEA
Scheduled
Sep 30
Times shown in airport local time
Service date: · Scheduled departure date (America/Los_Angeles)
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 22 min late
Ontario → Seattle
- 1 min early
Seattle → Ontario
- 97 min late
Ontario → Seattle
- 56 min early
Seattle → Ontario
- 102 min late
Ontario → Seattle
Is DL4031 usually late?
Observation window: Aug 31, 2026 – Sep 30, 2026
On time means arriving no more than 15 minutes after the scheduled time; late means more than 15 minutes after. Cancelled and diverted flights are counted apart from arrivals. Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
At the airports today
Seattle (SEA) departures
- Left more than 15 min late
- 81 of 270
- Cancelled today
- 1
Related flights
Flight history and details
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 29, 2026Arrived | Ontario | Seattle | 22 | |
| Sep 29, 2026Arrived | Seattle | Ontario | -1 | |
| Sep 28, 2026Arrived | Ontario | Seattle | 97 | |
| Sep 28, 2026Arrived | Seattle | Ontario | -56 | |
| Sep 27, 2026Arrived | Ontario | Seattle | 102 | |
| Sep 27, 2026Arrived | Seattle | Ontario | -37 | |
| Sep 26, 2026Arrived | Ontario | Seattle | 12 | |
| Sep 26, 2026Arrived | Seattle | Ontario | 21 | |
| Sep 25, 2026Arrived | Ontario | Seattle | 10 | |
| Sep 25, 2026Arrived | Seattle | Ontario | 3 | |
| Sep 24, 2026Arrived | Ontario | Seattle | 33 | |
| Sep 24, 2026Arrived | Seattle | Ontario | 0 | |
| Sep 23, 2026Arrived | Ontario | Seattle | 77 | |
| Sep 23, 2026Arrived | Seattle | Ontario | 0 | |
| Sep 22, 2026Arrived | Ontario | Seattle | 24 | |
| Sep 22, 2026Arrived | Seattle | Ontario | -20 | |
| Sep 21, 2026Arrived | Ontario | Seattle | 75 | |
| Sep 21, 2026Arrived | Seattle | Ontario | -1 | |
| Sep 20, 2026Arrived | Ontario | Seattle | 53 | |
| Sep 20, 2026Arrived | Seattle | Ontario | 5 | |
| Sep 19, 2026Arrived | Ontario | Seattle | -9 | |
| Sep 19, 2026Arrived | Seattle | Ontario | -17 | |
| Sep 18, 2026Arrived | Ontario | Seattle | -3 | |
| Sep 18, 2026Arrived | Seattle | Ontario | -19 | |
| Sep 17, 2026Arrived | Ontario | Seattle | 10 | |
| Sep 17, 2026Arrived | Seattle | Ontario | -24 | |
| Sep 16, 2026Arrived | Ontario | Seattle | 12 | |
| Sep 16, 2026Arrived | Seattle | Ontario | -1 | |
| Sep 15, 2026Arrived | Ontario | Seattle | -4 | |
| Sep 15, 2026Arrived | Seattle | Ontario | -13 | |
| Sep 14, 2026Arrived | Ontario | Seattle | 25 | |
| Sep 14, 2026Arrived | Seattle | Ontario | -20 | |
| Sep 13, 2026Arrived | Ontario | Seattle | 66 | |
| Sep 12, 2026Arrived | Ontario | Seattle | -19 | |
| Sep 11, 2026Arrived | Ontario | Seattle | 10 | |
| Sep 11, 2026Arrived | Seattle | Ontario | -26 | |
| Sep 10, 2026Arrived | Ontario | Seattle | 23 | |
| Sep 10, 2026Arrived | Seattle | Ontario | 1 | |
| Sep 9, 2026Arrived | Ontario | Seattle | 31 | |
| Sep 9, 2026Arrived | Seattle | Ontario | -6 | |
| Sep 8, 2026Arrived | Ontario | Seattle | 0 | |
| Sep 8, 2026Arrived | Seattle | Ontario | -11 | |
| Sep 7, 2026Arrived | Ontario | Seattle | 2 | |
| Sep 7, 2026Arrived | Seattle | Ontario | -21 | |
| Sep 6, 2026Arrived | Ontario | Seattle | 11 | |
| Sep 6, 2026Arrived | Seattle | Ontario | -15 | |
| Sep 5, 2026Arrived | Ontario | Seattle | 2 | |
| Sep 5, 2026Arrived | Seattle | Ontario | 3 | |
| Sep 4, 2026Arrived | Ontario | Seattle | 1 | |
| Sep 4, 2026Arrived | Seattle | Ontario | 14 | |
| Sep 3, 2026Arrived | Ontario | Seattle | 13 | |
| Sep 3, 2026Arrived | Seattle | Ontario | 315 | |
| Sep 1, 2026Arrived | Seattle | Ontario | 64 |
Email me if DL4031 runs late
We email you if your next DL4031 flight in the coming day is more than 15 minutes late, cancelled or diverted. Alerts last 30 days. No account needed.