How to find out when your flight will actually leave

Your airline's website and app are the fastest source. Log in with your confirmation number or ticket number, and you will see the current departure time — updated in real time as conditions change. The airline also sends text or email alerts to the phone number and address on your booking, so check those inboxes before calling.

If you are at the airport, the departure boards show the most current information. Gate agents and customer service desks have access to the same data the website does, but they are often slower to reach than refreshing the app yourself. Call the airline's customer service line only if the website is down or you need to rebook on a different flight — hold times are usually 30 minutes or longer.

For weather delays, the National Weather Service website shows radar and forecasts for your departure city. If thunderstorms are moving through, flights typically resume 30 minutes after the last lightning strike in the airport area. For fog or low visibility, resumption depends on when conditions improve enough for safe takeoff — this can be unpredictable and may take hours.

Key Takeaways

  • Check your airline's website or app first — it updates faster than calling and shows your specific flight's status in real time.
  • Weather delays usually clear within a few hours, but fog and thunderstorms can be unpredictable and may keep flights grounded longer.
  • Mechanical delays can take anywhere from one hour to overnight, depending on what the problem is and whether a replacement aircraft is available.
  • If your flight is cancelled rather than delayed, you have the right to rebook on the next available flight at no extra cost or receive a refund.
  • Text and email alerts from your airline tell you about changes, so check those before spending time on hold with customer service.

Why delays last different amounts of time

Weather is the most common reason flights are held on the ground. Thunderstorms, heavy rain, and low visibility all require the airport to pause takeoffs and landings until conditions are safe. Once the storm passes or visibility improves, flights resume quickly — usually within 30 minutes to an hour. Fog can be slower to clear and may keep an airport closed for several hours.

Mechanical problems vary widely in how long they take to fix. A minor issue like a lavatory malfunction might delay a flight 30 minutes to an hour. A serious problem — an engine fault, a hydraulic leak, or a structural crack — can ground a plane for hours or overnight while technicians diagnose and repair it. If the problem cannot be fixed quickly, the airline will bring in a different aircraft, which adds time for that plane to arrive and be prepared.

Air traffic control delays happen when an airport is too congested to land all incoming planes at once. These delays are usually short — 15 to 45 minutes — because planes are straightforward held in a queue. Crew scheduling issues occur when a flight crew runs out of legal working hours before the flight departs; the airline must wait for a fresh crew to arrive, which typically takes one to three hours.

What happens if your flight is cancelled instead of delayed

A cancellation is different from a delay. If your flight is cancelled, it will not depart that day. The airline must rebook you on the next available flight to your destination at no extra charge, even if it is on a competing airline. You can also request a full refund of your ticket price instead of rebooking.

The airline will contact you by phone, text, or email to inform you of the cancellation and your options. If you do not hear from them within a few hours, call their customer service line or visit the ticket counter at the airport. Have your confirmation number ready. If the next available flight is more than three hours away, the airline must also provide a meal voucher and hotel room if you need to stay overnight.

Checking your airline's specific policies

Each airline handles delays and rebooking differently, so read your airline's policy before your flight. Most major carriers — American, Delta, United, Southwest, JetBlue — post their delay and cancellation policies on their websites under "Customer Service" or "Policies." These pages explain what compensation or meals you are may have access to to and how to request a refund.

Some airlines offer travel credits or vouchers instead of refunds for cancelled flights. Others have stricter rules about which flights they will rebook you on. A few charge fees to change flights even when the airline caused the delay. Knowing your airline's rules before you travel means you will not be surprised if something goes wrong.

When to expect updates during a long delay

Airlines update flight status every 15 to 30 minutes during active delays. If your flight is delayed more than two hours, the airline will usually announce whether it will depart that day or be cancelled. This announcement typically comes three to four hours after the original departure time, though it can come sooner if the problem is clearly unfixable.

Do not assume silence means the flight is still on. Check your app or the airport departure board every 20 to 30 minutes. Weather can change quickly, and your airline may resume flights without a formal announcement — the board will straightforward show a new departure time. If you are at the airport, stay near your gate or keep your phone charged so you do not miss a last-minute push to depart.

What to do while you wait

If your delay is expected to be more than an hour, move away from the gate area to a quieter part of the terminal. Bring water, snacks, and a phone charger — airport outlets are often hard to find. If you have a long layover after this flight, contact your next airline when ready to let them know you may be late; they can hold a connection or rebook you if needed.

Keep your boarding pass and ID accessible. If the airline decides to depart suddenly, you will need to get to the gate quickly. If you leave the airport during a delay, tell a gate agent first — some airlines will not hold the flight if you are not present at boarding time, even if you are delayed by their own problem.

Frequently Asked Questions

Can I get money back if my flight is delayed but not cancelled?

No. U.S. airlines are not required to refund tickets for delays, only for cancellations. You are may have access to to a meal voucher and hotel room if the delay is long enough to require an overnight stay, but the amount varies by airline. Check your airline's policy for the specific threshold.

What if the delay is the airline's fault, not weather?

Mechanical problems and crew scheduling issues are the airline's responsibility, not an act of nature. You still cannot demand a refund for a delay, but you may be may have access to to compensation under your airline's policy or under European Union rules if you are flying from Europe. Read your airline's policy or contact them directly to ask about compensation.

How long can an airline delay a flight before they have to cancel it?

There is no legal limit in the U.S. An airline can delay a flight indefinitely as long as they believe it will eventually depart. However, most airlines will cancel a flight if the delay exceeds 12 to 24 hours, because holding a plane and crew that long becomes impractical and expensive.

Will the airline tell me if my flight is going to be cancelled?

The airline will contact you by phone, text, or email once they decide to cancel. This usually happens three to six hours after the original departure time, though it can happen sooner if the problem is clearly unfixable. Check your app frequently — the status will change there before you receive a formal notification.

Can I leave the airport and come back if my flight is delayed?

Yes, but tell a gate agent first. If you leave without notifying anyone and the flight departs early, the airline may not hold it for you. Some airlines will not reboard passengers who left the gate area during a delay, so confirm the policy before you go.