Every August, the FAA quietly publishes one of the most consequential documents in winter aviation: the holdover time guidelines for the coming season. The winter 2026–2027 tables were issued on August 11, and Part 121 and 135 operators across the country are updating their deicing programs against them right now. Most shippers have never heard of a holdover table. But between November and March, those tables — and the deicing queues behind them — decide whether time-critical freight moves on schedule or sits on a ramp watching the clock run.
What Deicing Actually Does
The rule underneath it all is simple and absolute: no aircraft may take off with frost, ice, or snow adhering to its wings, control surfaces, or propellers. Contamination changes the shape of the wing, and a wing that has changed shape does not produce the lift the performance numbers assume. There is no waiver for urgent cargo.
So when frozen precipitation is falling, aircraft get treated before departure. Deicing fluid — heated and sprayed under pressure — strips off what has already accumulated. In active precipitation, a second, thickened anti-icing fluid goes on top and clings to the surfaces to keep new snow and ice from bonding.
That protection is not indefinite, which is where holdover time comes in. Holdover time is the window between fluid application and the moment the fluid can no longer absorb what is falling on it. The window shifts with fluid type, temperature, and the kind and intensity of precipitation — in heavy snow at low temperatures it can get very short. If the aircraft does not lift off inside the window, it goes back for another treatment and rejoins the queue. On a bad night at a busy airport, that queue is the schedule.
The tables also change every season, and this year they moved. The winter 2026–2027 package adds new fluid-specific tables, revises several others, removes one Type IV fluid from the guidelines, and reduces some generic Type IV holdover times in certain conditions — so on some nights this winter, the protection window will be shorter than the one crews flew with last season. Operators must replace last season’s data and brief crews before using the new numbers.
Where Winter Actually Breaks a Supply Chain
The deicing pad is rarely the whole story. Winter disrupts time-critical logistics in layers:
- Queues and ground stops. Deicing throughput is finite. When demand outruns pad capacity, departure delays stack, and traffic management initiatives at the departure or arrival end stretch them further.
- Hub cascade. Integrated carrier networks concentrate overnight freight through a small number of hubs. An ice storm over the wrong city at the wrong hour doesn’t delay one shipment — it delays the sort, and everything flowing through it.
- Missed connections. A next-flight-out shipment that misses its connection in a storm doesn’t slip an hour; it often slips to the next day’s schedule.
- Crew duty limits. Delays consume duty time. A flight that finally gets its release can still cancel because the crew has run out of legal hours.
None of this is anyone’s failure — it is the system working as designed, safely. But “safely delayed” is cold comfort when the freight is an AOG part, a production-line component, or tissue for a scheduled surgery.
How We Plan Around It
Winter is when dedicated charter earns its keep, because charter keeps options open that scheduled networks give up. We watch the weather against every active mission and re-plan before the delay happens, not after. If the natural airport is buried, we look at alternates — sometimes a general aviation field forty minutes’ drive away that is open, plowed, and deicing with no queue. If a hub sort is at risk, we route around the hub entirely with point-to-point lift. Aircraft choice matters too: for the right mission we favor equipment that can accept a runway the storm hasn’t reached, and we position it early — ahead of the weather — rather than filing into the teeth of it.
The honest version of winter planning is that nobody beats the weather; you beat the queue. Booking the backup before you need it, holding a charter option while the scheduled connection is still theoretically alive, deciding at the first slip instead of the third — that is what keeps a winter shipment on the day it was promised.
Build the Contingency Before the First Storm
The holdover tables are published, the operators are trained, and the season is coming either way. If your operation moves freight that cannot wait out a storm, the time to set up the charter contingency — approved vendors, standing quotes, a desk that answers — is before the first ground stop of the season, not during it.
Our desk is staffed 24/7/365, storms included. Call (858) 529-7860 or email quotes@onflyair.com and we’ll build the winter plan with you now — so when the radar lights up, you already know your move.