| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jan 04 | ATL | ONT | 18:16 | 19:46 |
Landed
|
Track > |
| Jan 03 | ATL | ONT | 19:25 | 20:42 |
Delayed
|
Track > |
| Jan 02 | ATL | ONT | 18:05 | 19:50 |
Cancelled
|
Track > |
| Claim > | ||||||
| Jan 01 | ATL | ONT | 18:40 | 19:58 |
Landed
|
Track > |
| Dec 31 | ATL | ONT | 18:19 | 19:31 |
Landed
|
Track > |
| Dec 30 | ATL | ONT | 18:46 | 19:59 |
Landed
|
Track > |
| Dec 29 | ATL | ONT | 18:21 | 20:06 |
Landed Late
|
Track > |
| Dec 28 | ATL | ONT | 18:18 | 19:49 |
Landed
|
Track > |
| Dec 27 | ATL | ONT | 18:29 | 19:50 |
Landed
|
Track > |
| Dec 26 | ATL | ONT | 18:25 | 19:40 |
Landed
|
Track > |
KLM Flight KL5851 connects Atlanta, United States to Ontario, United States, taking off from Atlanta Hartsfield-Jackson International Airport ATL and landing at Ontario International Airport ONT.
How long is the KL5851 flight from Atlanta to Ontario?
The average flight time from Atlanta to Ontario is 4 hours and 22 minutes. The flight distance is 3050 km / 1895 miles and the average flight speed is 693 km/h / 430 mph.
What is the On-Time Performance (OTP) of KLM Flight KL5851 Atlanta to Ontario?
The Airportia On-Time Performance Rating for KLM Flight KL5851 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight KL5851 arriving at?
Flight KL5851 arrives at Ontario International Airport (ONT) Terminal 2.
When was the latest KL5851 flight?
The latest flight took off on Monday, January 5th, 2026 with the flight status being Landed on 19:46.
How else can the flight KL5851 be referenced as?
This KLM flight can also be referenced as KLM5851, KL 5851, KLM 5851.
How often is flight KL5851 delayed?
On average, 40% of all KL5851 flights are delayed. The average delay is 21 minutes.
Can I get compensation for my delayed or cancelled KL5851 flight or baggage issues?
If your KL5851 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 KL5851 Flight Tracker above for more details.
Other flights departing from Atlanta ATL: DL2171, DL770, DL5144, DL5132
Other flights arriving at Ontario ONT: DL770, WN3983, WN2792, TA530
All flights connecting Atlanta ATL to Ontario ONT.