| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jul 13 | SEA | LHR | 21:55 | 14:43 |
En-Route
|
Track > |
| Jul 12 | SEA | LHR | 22:17 | 15:03 |
Landed
|
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| Jul 11 | SEA | LHR | 22:32 | 15:22 |
Landed
|
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| Jul 10 | SEA | LHR | 22:01 | 15:03 |
Landed
|
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| Jul 09 | SEA | LHR | 22:08 | 15:04 |
Landed
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| Jul 08 | SEA | LHR | 22:25 | 15:48 |
Landed
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| Jul 07 | SEA | LHR | 22:06 | 15:16 |
Landed
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| Jul 06 | SEA | LHR | 22:07 | 14:59 |
Landed
|
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| Jul 05 | SEA | LHR | 22:44 | 15:38 |
Landed
|
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| Jul 04 | SEA | LHR | 22:10 | 15:06 |
Landed
|
Track > |
KLM Flight KL6021 connects Seattle, United States to London, United Kingdom, taking off from Seattle Tacoma International Airport SEA and landing at London Heathrow Airport LHR.
How long is the KL6021 flight from Seattle to London?
The average flight time from Seattle to London is 8 hours and 57 minutes. The flight distance is 7701 km / 4785 miles and the average flight speed is 860 km/h / 534 mph.
How many KL6021 flights are operated per week?
7 flights per week. The flight KL6021 is operated on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.
What is the On-Time Performance (OTP) of KLM Flight KL6021 Seattle to London?
The Airportia On-Time Performance Rating for KLM Flight KL6021 is 5/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight KL6021 arriving at?
Flight KL6021 arrives at London Heathrow Airport (LHR) Terminal 3.
When was the latest KL6021 flight?
The latest flight took off on Tuesday, July 14th, 2026 with the flight status being En-Route on 14:43.
How else can the flight KL6021 be referenced as?
This KLM flight can also be referenced as KLM6021, KL 6021, KLM 6021.
How often is flight KL6021 delayed?
On average, 20% of all KL6021 flights are delayed. The average delay is 8 minutes.
Can I get compensation for my delayed or cancelled KL6021 flight or baggage issues?
If your KL6021 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 KL6021 Flight Tracker above for more details.
Other flights departing from Seattle SEA: DL2512, DL20, AS1560, AS522
Other flights arriving at London LHR: AV120, DL20, BT5630, BA387
All flights connecting Seattle SEA to London LHR.
