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KLM customer service in the UK: phone, chat, complaints and claims

KLM steers UK customers to online requests first – complaints, claims and refunds are all made, tracked and updated through one request system – but it also lists a UK Service Line, round-the-clock chat and WhatsApp. These are the routes on klm.co.uk, checked 10 November 2026.

By the EU261 Flight Delay editorial team Last reviewed: How we write our guides

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In short: KLM Service Line (UK): +44 20 7660 0293, English, national standard rate; hours shown on 10 November 2026: 09:00–17:30 London time. Chat: 24/7 on the website; WhatsApp and Messenger 24/7 in English. Complaints and claims: online request (klm.co.uk/claim), trackable. Escalation: AviationADR. Checked 10 November 2026 on klm.co.uk.

KLM phone number for the UK

KLM’s contact pages show phone details under “Need more help?” at the bottom of each topic. On the complaints page for the UK:

LineNumberLanguageHours (London time)Cost
KLM Service Line – United Kingdom+44 20 7660 0293English09:00–17:30 (shown as today’s hours on Tuesday 10 November 2026)“National standard rates”

KLM only displays the current day’s hours, so weekend times may differ. Flying Blue members can log in to get a service level based on their status. KLM does not list a separate Irish number on the UK site.

Chat, WhatsApp and Messenger

  • Website chat: KLM says “You can chat with us 24/7 from your computer”, using the chat button on the contact pages.
  • WhatsApp and Facebook Messenger: offered on the baggage contact page, in English, 24/7.

Chat is useful for quick questions and for following up. For anything you may need to prove later – a complaint, a compensation claim, a refund – use the online request so you have a reference number. KLM itself warns that “due to high demand, our response time may be longer than usual”.

Complaints, compensation and refunds

KLM runs complaints, claims and refunds through one request system (“Submit, change or track a request”):

What you wantWhere
Complaint, or EU261/UK261 compensation, or expensesklm.co.uk/claim – log in, or find your booking with the booking code and name
Check status or add missing information“Track or edit my request” on the same page
RefundRefund contact page

KLM gives no fixed reply time. Be careful with how you are paid: KLM offers compensation as a travel voucher – a higher non-refundable one, or a “cash” voucher you can exchange for money within one year. Under the Regulation you are entitled to money, so say you want a bank transfer. As a Dutch airline, KLM pays €250 / €400 / €600 under EU261, or £220 / £350 / £520 under UK261 on flights from the UK. Background: KLM delay compensation.

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What happened?Step 1 of 4

What happened to your flight?
Where did you fly from and to?

With a connection, enter your first departure and your final destination – compensation is based on the total distance.

How late did you arrive at your final destination?

What counts is when the aircraft doors opened at your destination – not the departure delay.

When were you told about the cancellation?
When did you arrive on the replacement flight?
Which airline operated the flight?
When was the flight?

How many passengers were on the booking?

1 passenger

Every passenger gets their own compensation, children too. Infants under 2 without their own seat do not count.

  • Free, no sign-up
  • Fee only if successful (35%)
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Delayed or damaged baggage

On “My baggage didn’t arrive on the baggage belt”, KLM offers Report delayed baggage and, once reported, Trace my delayed baggage. Damaged baggage has its own page in the same Baggage topic. A baggage phone number is shown only after you choose the country where you should have collected the bag; otherwise use the online forms, WhatsApp or Messenger. The legal deadlines – 7 days for damage, 21 days for delay – are in our delayed baggage and Montreal Convention guides.

Escalation: AviationADR

KLM’s complaints page says that if you have already made a request and are unhappy with the response, you can contact AviationADR on its website or by email at aviation@cdrl.org.uk. AviationADR is CAA-approved and free for passengers; apply after KLM’s final response or once 8 weeks have passed. See ADR schemes and our ADR complaint template. Because KLM belongs to an ADR scheme, the CAA’s complaints team will normally send UK passengers there.

KLM’s UK site lists an “Address for Service” in the footer for legal documents; for complaints, use the online request.

Frequently asked questions

What is the KLM phone number in the UK?

+44 20 7660 0293, the KLM Service Line for the United Kingdom, in English, at national standard rates. On 10 November 2026 it showed opening hours of 09:00–17:30 London time.

Can I contact KLM on WhatsApp?

Yes. KLM offers WhatsApp and Facebook Messenger in English, 24/7. Website chat is also available 24/7.

How do I submit a complaint or claim to KLM?

Online at klm.co.uk/claim. You can log in or find your booking with the booking code and your name, and track or edit the request later.

Does KLM pay compensation in cash?

KLM offers vouchers, including a “cash” voucher that can be exchanged for money within one year. You are entitled to money under the Regulation, so ask for a bank transfer.

The KLM name belongs to its owner; EU261 Flight Delay is an independent information site and is not affiliated with KLM. Information only, not legal advice.

Sources

  1. Contact – I want to make, edit or track a complaint – KLM
  2. Contact – My baggage didn’t arrive on the baggage belt – KLM
  3. Make a request (claims) – KLM
  4. Compensation – KLM
  5. AviationADR – complaints process and participating members – AviationADR

We check every rule against the sources above. Spotted an error? Tell us – see our editorial policy.