| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jun 06 | ONT | SEA | 13:48 | 16:08 |
Landed
|
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| Jun 05 | ONT | SEA | 13:37 | 15:47 |
Landed
|
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| Jun 04 | ONT | SEA | 13:39 | 16:05 |
Landed
|
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| Jun 03 | ONT | SEA | 13:40 | 16:07 |
Landed
|
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| Jun 02 | ONT | SEA | 13:36 | 15:56 |
Landed
|
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| Jun 01 | ONT | SEA | 13:41 | 16:09 |
Landed
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| May 31 | ONT | SEA | 13:45 | 16:06 |
Landed
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| May 30 | ONT | SEA | 13:40 | 15:57 |
Landed
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| May 29 | ONT | SEA | 13:44 | 16:07 |
Landed
|
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| May 28 | ONT | SEA | 13:57 | 16:51 |
Landed Late
|
Track > |
Delta Air Lines Flight DL3840 connects Ontario, United States to Seattle, United States, taking off from Ontario International Airport ONT and landing at Seattle Tacoma International Airport SEA.
How long is the DL3840 flight from Ontario to Seattle?
The average flight time from Ontario to Seattle is 2 hours and 24 minutes. The flight distance is 1540 km / 957 miles and the average flight speed is 642 km/h / 399 mph.
What is the On-Time Performance (OTP) of Delta Air Lines Flight DL3840 Ontario to Seattle?
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.
When was the latest DL3840 flight?
The latest flight took off on Saturday, June 6th, 2026 with the flight status being Landed on 16:08.
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, 10% of all DL3840 flights are delayed. The average delay is 16 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.
Flight DL3840 is code-shared by 2 airlines using the flight numbers VS4052, KL5993
Other flights departing from Ontario ONT: WN3062, DL1006, WN2126, AS2440
Other flights arriving at Seattle SEA: AS316, AS3033, AS729, DL3955
All flights connecting Ontario ONT to Seattle SEA.