LHR · London · Terminal T4
KLM Check-in at London Heathrow Airport
KLM departs from Terminal T4 at London Heathrow Airport. Online check-in opens 30h before departure.
KLM check-in rules at LHR
Step-by-step at London Heathrow Airport
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Check in online
Open the KLM app or website 30 hours before departure. Save the boarding pass to your phone wallet.
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Arrive at Terminal T4
KLM flights at LHR depart only from Terminal T4. Allow 120 minutes from arrival to gate.
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Drop off bags at T4 main hall
Bag-drop 2 hours before departure, closes 45 minutes before departure. Self-service kiosks available.
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Clear security
Submit your wait time on the airport page above to help others. Standard liquids rule: 100 ml in a single transparent bag.
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Walk to gate T4 gates 1–24
Allow 5–15 minutes from security to your gate. Boarding starts 30 minutes before departure; gate closes 20 minutes before.
Boarding KLM at LHR
Terminal T4 notes
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Typical gates
KLM flights typically depart from gates T4 gates 1–24.
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Walk time
Expect 5–15 minutes from security to the furthest gate.
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Eat & shop
T4 has Pret, Wagamama, Plaza Premium Lounge dining, World Duty Free.
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Lounges
KLM Crown Lounge LHR T4 (World Business + SkyTeam Elite Plus). Modern facility.
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Family / accessibility
Family priority lane. Stroller drop at gate. KLM offers children's bag with toys.
Known issues at LHR with KLM
Shuttle-style flights — close together
Problem: Multiple daily LHR-AMS flights mean tight turnarounds. If your flight is delayed, the next AMS flight may be only 1–2 hours later.
Solution: If using AMS as transit hub, KLM rebooks automatically. Allow 2.5h connection at AMS for long-haul onward flights.
Estimate your EU 261 compensation
Flights to/from the EU, delayed 3+ hours or cancelled with less than 14 days' notice, are eligible for €250–€600 in compensation. Check your eligibility in 60 seconds: