Wind speed that stops flights depends on the aircraft type and runway direction

Airlines do not delay or cancel flights at a single wind speed threshold. Instead, the limit depends on three things: the specific aircraft, whether the wind is a headwind or crosswind, and the runway orientation. A Boeing 737 might operate safely in conditions that ground a regional jet. A headwind that helps a plane take off becomes a crosswind problem on a different runway. Most commercial aircraft can handle headwinds up to 40 to 50 knots, but crosswind limits typically fall between 25 and 35 knots — and some smaller regional aircraft cannot exceed 20 knots of crosswind.

When wind gusts exceed these limits, the pilot loses the ability to control the aircraft during takeoff or landing. The plane may drift sideways, overshoot the runway, or fail to lift off within the available distance. Rather than attempt a landing that could fail, pilots and dispatchers choose to delay the flight, divert to another airport, or cancel it entirely. The decision happens on the ground before the flight departs, not in the air.

Key Takeaways

  • Headwind limits for most commercial jets range from 40 to 50 knots, while crosswind limits are typically 25 to 35 knots depending on aircraft type.
  • A crosswind is more restrictive than a headwind because it pushes the aircraft sideways, and smaller regional aircraft have lower crosswind tolerances than large jets.
  • Wind gusts matter more than steady wind speed — a 30-knot steady wind may be acceptable, but gusts to 40 knots can trigger a delay.
  • Pilots and dispatchers check wind conditions before departure and decide whether to delay, divert, or cancel based on the aircraft's certified limits.
  • Runway direction affects whether wind is a headwind or crosswind, so the same weather may delay flights on one runway but not another.

How headwind and crosswind limits differ

Headwind blows directly into the nose of the aircraft. It slows the plane's movement across the ground, which means the aircraft needs more runway to take off and has more air flowing over the wings to generate lift. Pilots generally prefer headwind for this reason. Most commercial aircraft are certified to take off and land in headwinds up to 40 to 50 knots without restriction.

Crosswind blows perpendicular to the runway — from left to right or right to left. It pushes the aircraft sideways. The pilot must steer into the wind and use control surfaces to keep the nose pointed down the runway while the fuselage drifts. This is much harder to control than a headwind, especially during the critical moments of takeoff rotation or landing flare. Crosswind limits are lower: typically 25 to 35 knots for large jets, and as low as 15 to 20 knots for regional turboprops and smaller aircraft.

When a storm approaches from the side, the airport may become unusable for one runway direction but remain open for the other. If the wind is from the north and the airport has two parallel runways running north-south, planes can use the runway that points north (taking off into the headwind). If the wind shifts to come from the northeast, it becomes a crosswind problem on both runways, and delays or diversions become likely.

Why gust speed matters more than steady wind

The wind speed reported by the airport weather station is usually the sustained wind — the average over a 10-minute period. But wind is not steady. Gusts spike above the average, sometimes by 10 to 20 knots or more. A pilot or dispatcher checking conditions might see "wind 25 knots, gusts to 40" and must assume the aircraft will encounter that 40-knot gust during takeoff or landing.

An aircraft certified for 35 knots of crosswind can operate in 25 knots of steady crosswind, but if gusts reach 40 knots, the limit is exceeded. The pilot cannot predict exactly when a gust will hit — it might occur during the most critical phase of flight, when the aircraft is slowest and least controllable. To avoid that risk, the flight is delayed until gusts drop below the limit, or it is diverted to an airport with calmer conditions.

Thunderstorms and wind shear create the most dangerous gust patterns because they are unpredictable and can change within minutes. A flight might be cleared for takeoff, then encounter a sudden downdraft or microburst that exceeds the aircraft's control limits. For this reason, pilots will abort a takeoff if wind conditions deteriorate after they have started the takeoff roll.

Regional aircraft have lower wind limits than large jets

A regional jet carrying 50 to 70 passengers has a lower crosswind limit than a Boeing 737 or Airbus A320 carrying 150 to 180 passengers. The smaller aircraft has less weight, smaller control surfaces, and less aerodynamic authority to fight a crosswind. A regional turboprop might be limited to 15 knots of crosswind, while a large jet is certified for 30 to 35 knots.

This matters because regional carriers often operate from smaller airports with shorter runways and fewer runway directions. When wind shifts to a crosswind direction, a regional flight may be delayed or cancelled while larger jets at the same airport continue to operate. Passengers on connecting flights through a hub may experience cascading delays if regional feeders are grounded but mainline flights are not.

How pilots and dispatchers make the decision to delay or cancel

Before each flight, the dispatcher and pilot review the current weather and the aircraft's certified limits. The dispatcher checks the airport's ATIS (Automated Terminal Information System), which broadcasts wind, visibility, and runway in use. If wind is within limits, the flight is cleared to depart. If wind is marginal — close to the limit but not exceeding it — the pilot may request a delay to see if conditions improve, or request a diversion to a nearby airport with better weather.

Once airborne, the pilot receives updated wind information from air traffic control. If conditions deteriorate unexpectedly, the pilot can request to divert to an alternate airport. If the pilot is already on approach and wind exceeds limits, the pilot will execute a go-around — abort the landing, climb back to altitude, and either wait for conditions to improve or divert. A go-around is safe but adds fuel burn and delay.

The decision to cancel a flight is made by the airline, not the pilot. If wind is forecast to remain above limits for many hours, or if multiple runways are unusable, the airline may cancel the flight rather than delay it indefinitely. Cancelled flights are rebooked on later flights or other airlines, and passengers receive rebooking or refund options depending on the airline's policy.

Wind conditions that typically trigger delays at major airports

At most major U.S. airports, crosswind delays become common when sustained crosswind reaches 25 to 30 knots, or when gusts exceed 35 to 40 knots. Headwind delays are rare because headwind is beneficial, but a very strong headwind (above 50 knots) can cause a delay if the aircraft cannot generate enough lift or if the runway is too short for the required takeoff distance.

Winter storms in the Northeast and Midwest often produce crosswinds of 30 to 40 knots, which delays regional flights and can affect larger jets if gusts spike. Summer thunderstorms can produce wind shear and microbursts that exceed any aircraft's limits, leading to ground stops where no flights are allowed to depart or land until the storm passes. Coastal airports like San Francisco and Denver, which sit in mountain passes, experience frequent crosswind delays because wind is funneled and accelerated by terrain.

What happens when you are delayed due to wind

If your flight is delayed due to wind, the airline will hold the flight at the gate or on the tarmac until conditions improve or until a decision is made to divert or cancel. You will see the delay reflected in the flight status on the airline's website or app, usually listed as "weather" or "wind." The pilot and dispatcher are monitoring conditions continuously, and the flight will depart as soon as wind drops below the aircraft's limits.

If the delay extends beyond a few hours, the airline may offer to rebook you on a later flight, a different airline, or a ground transportation option like a bus or hotel voucher. Policies vary by airline and by whether the delay is within or outside the airline's control. Wind is considered an act of nature, so airlines are not required to pay compensation under U.S. Department of Transportation rules, but they must rebook you at no additional cost.

Frequently Asked Questions

What wind speed will definitely cancel my flight?

There is no single speed that cancels all flights. A 35-knot crosswind will cancel a regional flight but may not affect a large jet. A 50-knot headwind is rare and usually does not cause a cancellation. Cancellations happen when wind is forecast to remain above the aircraft's limit for many hours, or when multiple runways become unusable simultaneously. Check your airline's website for real-time flight status.

Can a plane take off in 40-knot winds?

It depends on wind direction and aircraft type. A 40-knot headwind is well within limits for most commercial jets. A 40-knot crosswind exceeds the limits of most aircraft and will cause a delay or cancellation. A 40-knot gust in a crosswind direction will also trigger a delay even if the sustained wind is lower. The pilot and dispatcher determine whether the specific conditions are within the aircraft's certified limits.

Why do some flights depart in wind that delays others?

Different aircraft have different wind limits. A large jet may depart in 30 knots of crosswind while a regional turboprop is grounded. Also, wind direction matters — a 30-knot wind from the north is a headwind on one runway and a crosswind on another. The same weather can delay flights on one runway while other runways remain open.

Do pilots practice landing in high wind?

Yes. Pilots train in simulators to land in crosswind conditions up to the aircraft's certified limit. They also train for wind shear and microburst recovery. However, training is different from actual flight — simulators cannot replicate the full sensory experience of a real crosswind landing. Pilots are conservative and will divert or go around if conditions exceed their comfort level or the aircraft's limits.

Will my flight be delayed if wind is forecast but not happening yet?

Not usually. Dispatchers make decisions based on current conditions and short-term forecasts (the next 2 to 4 hours). If wind is forecast to arrive later in the day, your morning flight will depart on time. If you are scheduled to depart in the afternoon when wind is expected, the airline may delay the flight preemptively or offer to rebook you on an earlier flight to avoid the weather.