Will Planes Fly in Snow? Yes, and Here Is What Actually Stops Them

Yes, planes fly in snow. Airliners take off and land in it all winter, and a snowfall alone does not ground a flight.

Three things do: a wing that cannot be kept clean, a runway too slick to stop on, and visibility below the legal limit. None of the three is a snowfall total.

The measure that surprises most people is the clock. Once a jet is deiced, the fluid protects it for a set time that depends on how hard it is snowing, and in heavy snow the published tables give no time at all.

How Many Inches of Snow Will Cancel a Flight?

There is no set number of inches of snowfall. The limits are set by the condition of the runway and the aircraft, so a plowed runway can keep working in a deep snowstorm while a thin layer of wet ice earns the lowest possible code.

Chicago Midway shows how far that goes. On December 8, 2005, jets were still landing there in a storm that dropped about 10 inches in total, with arrivals held in the air while plows cleared the runway.

Big cancellation days come when a storm overwhelms an airport’s whole system. On January 25, 2026, airlines canceled more than 11,000 U.S. flights according to FlightAware, as snow, sleet and freezing rain spread from the Southern Rockies to New England.

That day, airlines canceled every flight at Reagan National, and LaGuardia closed in the afternoon. Delays often outlast the snow too, because planes need deicing and departures back up, and air traffic control meters the flow.

The Wing Has to Be Clean Before Takeoff

The first limit is a hard rule. U.S. airline regulations bar a takeoff when frost, ice or snow is adhering to the wings, control surfaces or propellers.

So in falling snow, the jet gets sprayed. The first job is removing what is there, and a thicker fluid then keeps new snow from sticking, a process covered in our guide to why planes need to be deiced. See what airplane deicer is made of for the chemistry.

The time that fluid keeps working is called holdover time. Thin Type I fluid is short-lived: in Transport Canada’s tables, at 27°F and above it gives just 6 to 11 minutes in moderate snow.

Thicker Type IV fluid gives 25 to 55 minutes in the same snow. If a plane is stuck in line too long, it can have to go back for another spray, which is one reason snow delays compound.

Heavy snow is where the tables stop. Transport Canada’s tables say no holdover times exist when the visibility works out to heavy intensity, and wind, jet blast or blowing snow can cut protection below even the lowest listed time.

The fluid is also a ground-only tool. It does not protect the aircraft in flight, where in-flight icing is a separate problem handled by the plane’s own systems.

Can Planes Land in Snow? The Runway Decides

Yes, and the runway gets a grade first. Since October 1, 2016, U.S. airports have used a Runway Condition Assessment Matrix, which assigns a code from 0 to 6 to each third of the runway.

Look at how little the depth matters past 1/8 inch (3 mm). Deep dry snow scores better than thin ice, which is why the ratings describe the surface and not the total snowfall.

Pilots then calculate whether they can stop in the distance available, using wheel brakes and reverse thrust together. Ramps and taxiways turn slick as well.

Slick ramps can send aircraft sliding on the ground too. Watch the “Plane sliding on ice” video on YouTube.

The matrix exists because of a landing at Midway. On that 2005 night, Southwest Flight 1248, a Boeing 737-700, ran off the end of runway 31C, which has 5,826 feet of usable landing distance, and struck a car on the road beyond. A child in the car was killed.

Braking reports that night were mixed: good or fair for the first half of the runway, poor for the second. The NTSB’s probable cause was the pilots’ failure to use reverse thrust in time, and the FAA formed the committee behind the new matrix after that accident.

Visibility: Whiteout, Flat Light and Takeoff Minimums

The third limit is the opposite of CAVOK. Where an airport has no published takeoff minimums, U.S. airline, charter and foreign-carrier takeoffs under instrument rules need 1 statute mile of visibility for two-engine planes and 1/2 mile for planes with more than two.

Approved operators can go well below that with the right runway lights and sensors. AOPA describes authorizations down to 500 feet of runway visual range, so a gray view from the terminal does not settle it.

Airbus demonstrated fully automatic, vision-based takeoffs in a research program it concluded in June 2020.

Pilots flying by sight have a harder problem. The FAA describes whiteout as being engulfed in a uniformly white glow with no shadows, horizon or references, and its advice is blunt: never take off in one.

Flat light is the milder version, which the FAA calls an optical illusion and a partial white out. Pilots lose depth perception and contrast, and level flight can feel like a climb or a descent.

Does Snow Hurt the Engines?

Jets fly through falling snow routinely, but heavy precipitation is a known risk to steady combustion. SKYbrary lists water ingestion from heavy precipitation or contaminated runways among the conditions that can disrupt it, leading in serious cases to a flameout.

That is why many procedures tell pilots to select continuous ignition in significant precipitation. Normally the ignition system runs only during engine start, because combustion then sustains itself as long as fuel and airflow are not interrupted.

Taking Off From Snow Itself

Some aircraft skip the plowed runway altogether. The 109th Airlift Wing flies the Defense Department’s only ski-equipped LC-130 Hercules aircraft, on missions to Greenland and Antarctica.

To get those skibirds off snow or ice, crews have used jet-assisted takeoff bottles, firing eight at a time. Production of the bottles stopped in 1991, and in 2022 the wing assembled the Air National Guard’s first T56 3.5 engine, part of a shift away from the bottles.

Light planes do it on a smaller scale. AVweb’s ski-flying advice is to plan a takeoff run at least 10 percent longer than on wheels, because snow adds drag.

The hazard on a frozen lake is overflow, when water runs over the ice and saturates the snow on top. It can make it impossible to get the plane moving fast enough to take off, so pilots test unfamiliar ice with a modified touch-and-go before committing.

Bush pilots also have a low-tech fix for flat light. They carry red shop rags and toss two or three out over the landing site, which gives them something to judge the flare against.

Antarctica goes one step further with wheels on ice. Blue-ice areas have no net annual snow accumulation, and the first wheeled landing at Patriot Hills came in December 1986.

Australia’s Wilkins Aerodrome, about 43 miles (70 km) southeast of Casey research station, has a 10,500-foot (3,200 m) runway on natural glacial ice. Airbus A319s fly it from Hobart, and a snow groomer tills the surface before each wheeled flight to raise its friction.

Air Florida Flight 90: The Flight That Shows Why the Rules Exist

On January 13, 1982, a Boeing 737-200 left Washington National in heavy snow at 24°F (-4°C). The NTSB records it hitting the 14th Street Bridge and plunging into the ice-covered Potomac River.

Deicing finished at 3:10 p.m., but the takeoff roll did not begin until about 3:59 p.m. That is nearly 50 minutes in falling snow, and the relief operator had mixed the right side’s fluid for a warmer 28°F.

At the gate, a tug could not move the jet on the icy ramp, so the crew tried reverse thrust, which the tug operator said was against American Airlines policy. After pushback, the captain answered “off” to the anti-ice item on the checklist.

The crew also pulled up close behind a DC-9, apparently hoping its exhaust would melt the snow. The slush it produced refroze on the leading edges and engine inlets.

The takeoff setting was 2.04 engine pressure ratio. With engine anti-ice off, the gauges read falsely, and the actual power corresponded to only about 1.70, despite the first officer’s “that’s not right” and “Naw, I don’t think that’s right.”

The jet came down 0.75 nautical miles from the runway’s end. Seventy-four of the 79 people aboard died, along with four people in vehicles on the bridge.

Two of the biggest changes to the rules around snow followed accidents, as the entries below show.