Is DL4031 delayed?
Each route and date is shown separately. Confirm that both airports match your booking.
Service date: · Scheduled departure date (America/Los_Angeles)
No live update yet
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Update time unavailable
Departure
Seattle
SEA
Scheduled
Sep 16
Arrival
Ontario
ONT
Scheduled
Sep 17
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
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.
Service date: · Scheduled departure date (UTC)
4 min early
Official source · Updated
Departure
Ontario
ONT
Actual
Sep 16
Arrival
Seattle
SEA
Actual
Sep 15
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
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.
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 4 min early
ONT → SEA
- 13 min early
SEA → ONT
- 25 min late
ONT → SEA
- 20 min early
SEA → ONT
- 66 min late
ONT → SEA
Flight history and details
Aug 17, 2026 — Sep 16, 2026
- Observed arrivals
- 27
- Arrivals over 15 minutes late
- 7
- Observed cancellations
- 0
- Observed occurrences
- 39
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 16, 2026Arrived | Ontario | Seattle | -4 | |
| Sep 15, 2026Arrived | Seattle | Ontario | -13 | |
| Sep 15, 2026Arrived | Ontario | Seattle | 25 | |
| Sep 14, 2026Arrived | Seattle | Ontario | -20 | |
| Sep 14, 2026Arrived | Ontario | Seattle | 66 | |
| Sep 13, 2026Arrived | Ontario | Seattle | -19 | |
| Sep 12, 2026Arrived | Ontario | Seattle | 10 | |
| Sep 11, 2026Arrived | Seattle | Ontario | -26 | |
| Sep 11, 2026Arrived | Ontario | Seattle | 23 | |
| Sep 10, 2026Arrived | Seattle | Ontario | 1 | |
| Sep 10, 2026Arrived | Ontario | Seattle | 31 | |
| Sep 9, 2026Arrived | Seattle | Ontario | -6 | |
| Sep 9, 2026Arrived | Ontario | Seattle | 0 | |
| Sep 8, 2026Arrived | Seattle | Ontario | -11 | |
| Sep 8, 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 5, 2026Arrived | Ontario | Seattle | 1 | |
| Sep 4, 2026Arrived | Seattle | Ontario | 14 | |
| Sep 4, 2026Arrived | Ontario | Seattle | 13 | |
| Sep 3, 2026Arrived | Seattle | Ontario | 315 | |
| Sep 1, 2026Arrived | Seattle | Ontario | 64 | |
| Aug 31, 2026Arrived | Seattle | Ontario | 1 | |
| Aug 26, 2026Arrived | Seattle | Ontario | 17 |