LHR · London · Terminal T3
American Airlines Check-in at London Heathrow Airport
American Airlines departs from Terminal T3 at London Heathrow Airport. Online check-in opens 24h before departure.
American Airlines check-in rules at LHR
Step-by-step at London Heathrow Airport
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Check in online
Open the American Airlines app or website 24 hours before departure. Save the boarding pass to your phone wallet.
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Arrive at Terminal T3
American Airlines flights at LHR depart only from Terminal T3. Allow 120 minutes from arrival to gate.
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Drop off bags at T3 main hall
Bag-drop 3 hours before departure, closes 60 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 T3 gates 1–46
Allow 10–20 minutes from security to your gate. Boarding starts 45 minutes (long-haul) before departure; gate closes 20 minutes before.
Boarding American Airlines at LHR
Terminal T3 notes
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Typical gates
American Airlines flights typically depart from gates T3 gates 1–46.
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Walk time
Expect 10–20 minutes from security to the furthest gate.
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Eat & shop
T3 has Caviar House, Gordon Ramsay's Plane Food, World Duty Free. Standard LHR T3 selection.
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Lounges
Admirals Club T3 (Business + ConciergeKey + OneWorld Sapphire). Flagship Lounge (Flagship First/Business). Both at T3.
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Family / accessibility
Family priority lane at T3 security. Stroller drop at gate. AA offers children's meals on long-haul if pre-ordered 24h+ before.
Known issues at LHR with American Airlines
BA codeshare flights at T5
Problem: Many AA-numbered flights from LHR are operated by BA and depart from T5, not T3.
Solution: Check 'Operated by' on your booking. If BA, go to T5 and use ba.com for online check-in.
US-bound APIS data needed
Problem: Flights to US blocked until ESTA + passport + US address entered.
Solution: Use 'My Trips' on aa.com 24h+ before departure.
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: