London Heathrow Airport airport (LHR)

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

Online check-in opens
24h before departure
Online check-in closes
45 min before
Bag-drop opens
3 hours before departure
Bag-drop closes
60 minutes before departure
Counter location
T3 main hall (American Airlines dedicated counters)
Self bag-drop
T3 self-service kiosks

Step-by-step at London Heathrow Airport

  1. Check in online

    Open the American Airlines app or website 24 hours before departure. Save the boarding pass to your phone wallet.

  2. Arrive at Terminal T3

    American Airlines flights at LHR depart only from Terminal T3. Allow 120 minutes from arrival to gate.

  3. Drop off bags at T3 main hall

    Bag-drop 3 hours before departure, closes 60 minutes before departure. Self-service kiosks available.

  4. Clear security

    Submit your wait time on the airport page above to help others. Standard liquids rule: 100 ml in a single transparent bag.

  5. 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

  • Boarding starts: 45 minutes (long-haul) before departure
  • Gate closes: 20 minutes before departure
  • Boarding order: Flagship First → Flagship Business → ConciergeKey → Group 1 → Group 2–9
  • Priority boarding available: Yes (extra fee)

Terminal T3 notes

  • Typical gates

    American Airlines flights typically depart from gates T3 gates 1–46.

  • Walk time

    Expect 10–20 minutes from security to the furthest gate.

  • Eat & shop

    T3 has Caviar House, Gordon Ramsay's Plane Food, World Duty Free. Standard LHR T3 selection.

  • Lounges

    Admirals Club T3 (Business + ConciergeKey + OneWorld Sapphire). Flagship Lounge (Flagship First/Business). Both at T3.

  • 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:

American Airlines routes from LHR

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