Ghost capacity: scheduled seats vs actually bookable seats
Airlines first; also engine/OEM if flown capacity later follows
Earliest signal that consensus ASK growth is overstated. Short airlines with phantom capacity and weak demand; long competitors where ghost capacity implies a pricing umbrella. Also useful as an early read for aero names before actual block hours roll over.
OAG or Cirium schedules by publication snapshot; OAG Schedule Snapshot / Cirium Diio Schedule Snapshot; airline website scrape by flight/date; Amadeus Flight Offers Search or Sabre/Travelport shopping APIs for live availability; OAG Airfare / Altus for observed prices; cancellation history from OAG Flight Status or FlightAware AeroAPI. OAG says schedules cover 900+ airlines and are updated every 15 minutes; Cirium says its schedules include 900+ airlines and 12 months forward-looking coverage. (oag.com)
2
Route-level fuel breakeven fare
Airlines
Best way to predict where cuts happen and whose margins are most exposed. Short carriers operating below stressed breakeven; long carriers with high pass-through or stronger competitors exiting.
OAG/Cirium schedules; aircraft type and seat config from Cirium Fleets Analyzer or ch-aviation; fuel burn model by aircraft/sector length from Piano-X, Eurocontrol BADA, Cirium emissions/fuel-burn estimates, or internal model; jet fuel prices from Platts/Argus/Bloomberg; FX; airport charges from airport tariff PDFs; observed fares from OAG Airfare / Infare / airline scrape; actual flown block times from FlightAware/FR24. Cirium has published that it developed flight/aircraft-seat CO₂ and fuel-burn calculations. (Cirium)
3
Fuel pass-through by route and carrier
Airlines
Separates “fuel shock = bad” from “capacity discipline = fares up.” Long airlines raising fares faster than fuel cost; short those absorbing fuel.
Observed fares from OAG Airfare / Altus, Infare, airline/OTA/metasearch scrape; filed fare/rule changes from ATPCO; jet fuel forward curve; FX; route-level scheduled seats; forward bookings from IATA DDS / ForwardKeys / Amadeus Travel Intelligence; RASK/CASK from company filings. OAG says airfare data is tracked across carriers, channels and markets globally. (oag.com)
4
Competitor pain map by route overlap
Airlines
Highest-quality equity alpha: find routes where weak capacity exits and a stronger airline inherits pricing power. Long beneficiary, short retreating carrier.
Route overlap from OAG/Cirium schedules; market share by route/airport; observed fares from OAG Airfare / Infare; balance sheet/fuel hedge data from filings; aircraft type/fuel efficiency from Cirium/ch-aviation; slot-constrained airport flag; booking data from IATA DDS / ForwardKeys / Amadeus.
5
Tail-level utilization by engine family
Safran, GE Aerospace, Rolls-Royce, MTU, RTX/Pratt, aircraft OEMs; also airlines
Converts airline cuts into civil aero revenue impact. If flying hours/cycles fall by engine family, aftermarket expectations are at risk. If old aircraft stay active because deliveries are delayed, aftermarket may hold up.
Tail-level actual flights from FlightAware AeroAPI/Firehose, FR24, ADS-B Exchange-style feeds where legally usable; fleet/engine mapping from Cirium Fleets Analyzer, ch-aviation, Ascend; OAG schedule baseline; actual block time/cycles; parked/in-service status; aircraft age and operator. FlightAware says AeroAPI provides live/historical flight data including positions, historical tracks and airport activity. (FlightAware)
Safran, GE Aerospace, Rolls-Royce, MTU, RTX/Pratt; MRO-exposed suppliers
Better than raw block hours. Investment question is whether lower flying delays shop visits, reduces parts demand, or keeps spare-engine tightness elevated.
Engine family by tail from Cirium/ch-aviation; actual cycles/block hours from FlightAware/FR24; shop visit indicators from Cirium Ascend/Fleets Analyzer, airline maintenance disclosures, MRO commentary, engine OEM KPIs; spare engine lease rates from specialist brokers/IBA/Ascend; LLP cycle assumptions; USM/teardown pricing from aftermarket brokers. Cirium says Fleets Analyzer combines fleet and flight analytics with engine/component-level utilisation in an investor MRO forecasting case study. (assets.fta.cirium.com)
7
Aircraft parking / utilization decay / old fleet retention
Airlines; Airbus, Boeing, Safran, GE, Rolls, RTX, MTU
If high fuel triggers parking of older aircraft, aftermarket and used parts shift. But if OEM delivery delays force airlines to keep old aircraft flying, older-engine aftermarket can benefit. This is where lazy “fuel up = old planes down” thinking dies quietly.
Tail status from Cirium Fleets Analyzer, ch-aviation aircraft data, airline fleet pages, airport parking observations, ADS-B inactivity; aircraft age/engine type/ownership; maintenance check timing; delivery delays from Airbus/Boeing order books; monthly utilization by tail. ch-aviation says it tracks extensive commercial aircraft data, including registration, variant, status, ownership and MRO-related datasets. (ch-aviation)
8
Downgauging and equipment swaps
Airlines; Airbus/Boeing; engine OEMs
Captures hidden capacity cuts where flights stay but seat count falls. Also shows aircraft mix rotation, which drives fuel burn and engine-hour exposure.
Scheduled aircraft type from OAG/Cirium; actual flown aircraft type/tail from FlightAware/FR24; seat counts from Cirium/ch-aviation/airline seat maps; equipment-change history by flight number; route-level fare response.
9
Fuel hedge roll-off and effective fuel CASK curve
Airlines
Finds earnings cliff risk. Some airlines look protected for one or two quarters, then hedges roll off and margins get hit. Short where consensus underestimates effective fuel cost.
Airline fuel hedge disclosures from annual/interim reports; jet fuel, gasoil and Brent curves from Bloomberg/ICE/Platts/Argus; FX; projected consumption from capacity model; fuel burn by fleet mix; historical fuel CASK.
10
Booking momentum vs capacity growth
Airlines
If booked passengers lag scheduled capacity, cuts or fare discounting follow. Short airlines growing into weak bookings; long those with strong bookings and constrained seats.
Forward bookings from IATA DDS, ForwardKeys, Amadeus Travel Intelligence, Sabre MIDT-style data; scheduled seats from OAG/Cirium; fare scrape; load factor history. Amadeus Travel Intelligence includes air searches, air bookings, traffic and schedule data; ForwardKeys markets real-time/predictive air traffic and booking/travel-pattern data. (amadeus.com)
11
Airspace drag / actual distance vs great-circle distance
Airlines; Rolls-Royce/GE/Safran if long-haul hours shift
Finds carriers structurally hurt by rerouting, especially Europe-Asia or Middle East-sensitive networks. Higher fuel price makes every extra mile more punitive.
Actual flight tracks from FlightAware/FR24/Aireon-type ADS-B; great-circle route calculation; OAG/Cirium schedules; aircraft fuel burn curves; jet fuel prices; route fares and cargo estimates. FlightAware says its data includes terrestrial ADS-B and Aireon space-based ADS-B, with global tracking including oceans/deserts/poles. (FlightAware)
12
Slot-protected vs cuttable capacity
Airlines
Prevents bad short ideas. A fuel-negative Heathrow or Schiphol route may survive because slot value matters, while a secondary leisure route gets cut first.
Airport slot coordination files; IATA slot season data where available; OAG/Cirium route schedules; airport capacity constraints; route profitability model; historical season-to-season slot retention.
13
Cancellation reason classifier: commercial vs operational
Airlines; engine OEMs secondarily
Commercial cancellations months ahead are margin/capacity signals. Same-day cancellations are often weather/ATC/crew noise. Distinguishing them improves your signal-to-garbage ratio, a rare gift in aviation data.
Cancellation timing from OAG Flight Status / FlightAware; NOTAMs; weather; ATC disruption data from Eurocontrol/NATS; strike calendars; tail-level maintenance flags; schedule revision timestamps.
14
MRO deferral / cannibalisation stress index
Safran, GE, Rolls-Royce, MTU, RTX/Pratt; airlines
If airlines defer shop visits, OEM aftermarket revenue can lag flying activity. If cannibalisation rises, near-term airline cash flow improves but supplier revenue quality deteriorates.
High fuel should favour new aircraft, but delivery delays force old aircraft to keep flying. Long aftermarket where old fleets remain active; short airlines stuck with inefficient fleet and weak pricing.
Airbus/Boeing order and delivery data; airline fleet plans; Cirium/ch-aviation fleet age and orders; actual tail utilization; engine mix; lease expiry/check timing; fuel breakeven by subfleet; OEM production commentary.
16
Cargo offset on long-haul routes
Network airlines; widebody OEM/engine exposure
Some fuel-stressed long-haul routes survive because belly cargo subsidises passenger economics. Avoid falsely predicting cuts where cargo yield is the hidden support.
Cargo rates from TAC Index/Baltic Air Freight Index/freight forwarder data; widebody schedules from OAG/Cirium; route-level passenger fares; load factor; fuel burn; belly capacity by aircraft type; cargo revenue disclosures.
17
Labour/crew momentum as capacity confidence signal
Airlines
Hiring freezes, unpaid leave and base closures can lead formal capacity cuts. Useful, but noisier than booking/schedule/fare data.
Airline job postings, LinkedIn, airline career pages, pilot/cabin-crew recruitment events, union releases, crew base announcements, training school intake.
18
Wet lease / ACMI demand shift
Airlines; some aero suppliers second-order
Shows whether airlines are cutting variable capacity or covering aircraft shortages. Can explain why schedules hold despite owned-fleet problems.
ACMI schedules from OAG/Cirium; aircraft/tail operator mismatch from FlightAware/FR24; wet-lease announcements; charter/ACMI rates; airline fleet availability; aircraft grounding data.
Thing people call “fare buckets”
What it really means
Where to get it
Filed fares / fare rules
What airlines filed into distribution, including rules and restrictions
ATPCO pricing/rules data. ATPCO says it collects pricing data directly from airlines and is a key source for airline merchandising/pricing data. (atpco.net)
Observed market fares
Prices seen in shopping channels over time
OAG Airfare / Altus, Infare, airline/OTA/metasearch scrapes. OAG says its airfare product uses historical prices from 1,500+ booking sites including airline websites, OTAs, metasearch and GDSs. (oag.com)
Live booking-class availability
Actual availability by class, e.g. Y/B/M/K/L/T etc.
Travelport Air Availability by Booking Class, selected GDS APIs, airline NDC/direct API, or carefully permissioned booking-engine scraping. Travelport explicitly supports availability by booking class at segment level. (support.travelport.com)
Forward bookings / tickets
Actual bookings or ticketed demand by OD/POS/channel
IATA DDS, ForwardKeys, Amadeus Travel Intelligence, Sabre MIDT-style data. IATA DDS aggregates airline sales, market and itinerary data from carrier contributions, BSP and ARC sources. (IATA)
Live consumer flight offers
Searchable prices/availability, usually not full bucket inventory
Amadeus Flight Offers Search, Duffel, Sabre Air Search, direct NDC APIs. Amadeus says Flight Offers Search covers live prices and availability across 400+ airlines. (Amadeus IT Group SA)