Liquid anxiety: Which European airports have scrapped the 100ml limit?

Widespread deployment of new CT security scanners across European airports is prompting many hubs to drop the longstanding 100ml cabin liquid limit and permit containers up to 2 litres, with Heathrow applying the change across all terminals and other UK airports (Gatwick, Birmingham, Belfast, Edinburgh) also adopting it. Adoption is patchy on the continent: Frankfurt has 2L allowances at 15 lanes in Terminal 2 and five lanes in Terminal 1, Berlin allows 2L in 24 lanes, and Italy’s Milan Linate, Bologna, Rome Fiumicino, Malpensa T1 and Turin (fast-track) have rolled it out; several other airports including Dublin, Prague (Václav Havel T2), Vilnius, Kaunas, Kraków, Poznań, Cluj, Billund and Malta also allow 2L. The EU Commission has signalled a bloc-wide change is under consideration, but major hubs including Amsterdam, Barcelona, Brussels, Paris, Madrid, Athens and Lisbon are either undecided or retaining 100ml (Athens plans scanners by early 2027, Paris aims for readiness by 2030), a dynamic relevant to airport retail, security-equipment vendors and regulatory timelines.

Analysis

Market structure: Immediate winners are CT scanner manufacturers and integrators (e.g., OSI Systems - OSIS, L3Harris - LHX, Leidos - LDOS) plus travel-retail operators (Dufry - DUFN.SW, Lagardère travel-retail assets) because larger container limits (100ml → 2L) raise average duty‑free basket sizes and create a retrofit hardware cycle. Losers are incumbents that sell travel-size consumables (premium miniatures) and airports slow to deploy scanners (Paris, Madrid) that will cede retail spend and passenger satisfaction to early adopters.

Risk assessment: Tail risks include a terrorism-related reversion to strict limits (low prob, high impact), large-scale scanner software/false‑positive failures creating operational chaos, or EU regulatory delays (Paris full readiness by 2030). Timing: localized retail and order upside visible in 0–6 months at deployed airports, broader European procurement and capex 6–36 months; funding/tender cycles and service-contract terms are critical hidden dependencies.

Trade implications: Addressable retrofit market is material — ~hundreds of checkpoints in Europe; if average checkpoint retrofit = $0.5–3M, aggregate near‑term aftermarket = low‑to‑mid hundreds of millions. Favor security-equipment suppliers with installed‑base service revenue (OSIS, LHX, LDOS); favor travel‑retail operators with strong airport footprints for a 6–18 month retail uplift (+1–3% revenue per adopting airport expected).

Contrarian angles: Consensus underestimates procurement lead times and service/revenue mix (hardware wins alone underpriced). Mispricings: manufacturers with recurring service contracts and installed base are asymmetric winners; unintended consequence risk includes longer queues and staffing needs that could blunt retail gains. Historical parallel: post‑2006 liquid ban — durable ancillary winners emerged only after multi‑year infrastructure rollouts, so be selective on timing.

Key Decisions for Investors

• Establish a 2% long position in OSI Systems (OSIS) and a 1% long in L3Harris (LHX) (total 3% portfolio) over 12–24 months to play CT‑scanner retrofits and service revenues; target +20–35% upside if either secures multiple EU airport contracts; hard stop-loss 18% on entry.
• Initiate a 1.5% long position in Dufry (DUFN.SW) (or equivalent travel‑retail operator) to capture expected +1–3% liquids-related revenue per adopting airport within 6–18 months; take profits at +25% or if same-store retail uplift misses 2 consecutive quarters.
• Execute a relative pair: long DUFN.SW 1% / short IAG (IAG.L) 1% for 6–12 months — rationale: retail capture expands quicker than airline unit margins; unwind if IAG outperforms by >10% or passenger volumes compress >5% QoQ.
• Use options to limit cost: buy a 9–12 month call spread on OSIS (buy ATM call, sell ~25% OTM call) sized ≤0.5% portfolio to play procurement wins; concurrently buy a 3–6 month 10–15% OTM put spread on a major European leisure carrier (e.g., EZJ.L or IAG.L) sized ≤0.5% portfolio as insurance against a security incident or operational rollback.
• Trigger-based increase: monitor EU Commission formal harmonization or public procurement announcements over next 180 days; if a bloc‑wide mandate or multi‑airport funding program is published, increase security‑vendor exposure (OSIS/LHX/LDOS) by additional 1–2% each within 30 days of announcement.