| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jun 06 | SEA | ONT | 09:55 | 12:12 |
Landed
|
Track > |
| Jun 05 | SEA | ONT | 09:53 | 12:09 |
Landed
|
Track > |
| Jun 04 | SEA | ONT | 10:12 | 12:14 |
Landed
|
Track > |
| Jun 03 | SEA | ONT | 09:56 | 12:00 |
Landed
|
Track > |
| Jun 02 | SEA | ONT | 09:54 | 12:06 |
Landed
|
Track > |
| Jun 01 | SEA | ONT | 10:07 | 12:19 |
Landed
|
Track > |
| May 31 | SEA | ONT | 09:51 | 12:02 |
Landed
|
Track > |
| May 30 | SEA | ONT | 10:05 | 12:20 |
Landed
|
Track > |
| May 29 | SEA | ONT | 10:11 | 12:20 |
Landed
|
Track > |
| May 28 | SEA | ONT | 09:57 | 12:15 |
Landed
|
Track > |
Delta Air Lines Flight DL3840 connects Seattle, United States to Ontario, United States, taking off from Seattle Tacoma International Airport SEA and landing at Ontario International Airport ONT.
How long is the DL3840 flight from Seattle to Ontario?
The average flight time from Seattle to Ontario is 2 hours and 11 minutes. The flight distance is 1540 km / 957 miles and the average flight speed is 703 km/h / 437 mph.
What is the On-Time Performance (OTP) of Delta Air Lines Flight DL3840 Seattle to Ontario?
The Airportia On-Time Performance Rating for Delta Air Lines Flight DL3840 is 5/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight DL3840 arriving at?
Flight DL3840 arrives at Ontario International Airport (ONT) Terminal 2.
When was the latest DL3840 flight?
The latest flight took off on Saturday, June 6th, 2026 with the flight status being Landed on 12:12.
How else can the flight DL3840 be referenced as?
This Delta Air Lines flight can also be referenced as DAL3840, DL 3840, DAL 3840.
How often is flight DL3840 delayed?
On average, 0% of all DL3840 flights are delayed. The average delay is 0 minutes.
Can I get compensation for my delayed or cancelled DL3840 flight or baggage issues?
If your DL3840 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our DL3840 Flight Tracker above for more details.
Other flights departing from Seattle SEA: DL555, DL1914, AS449, AS374
Other flights arriving at Ontario ONT: WN3874, DL1006, AS625, A81955
All flights connecting Seattle SEA to Ontario ONT.