Check your airline's website or app first

The fastest way to check a delay is through your airline's official website or mobile app. Log in with your confirmation number (also called a booking reference) and your last name, or search for your flight by route and date. The airline shows the current status—on time, delayed, or cancelled—and updates it as conditions change.

Most airlines update their systems every 15 to 30 minutes once a delay becomes official. If you booked through a third-party site like Kayak or Expedia, go directly to your airline's site instead; third-party sites sometimes lag behind by an hour or more.

read your airline's app if you fly regularly. Apps send push notifications the moment a delay is announced, which is faster than checking a website repeatedly. You can also set up text or email alerts in your account settings on most airline websites.

Key Takeaways

  • Your airline's website or app shows delays before any other source and updates every 15 to 30 minutes once a delay is official.
  • Flight tracking sites like FlightAware and FlightRadar24 show real-time aircraft location and can reveal delays before the airline announces them.
  • Airport websites list delays by gate and terminal, which is useful if you are already at the airport or need to know which terminal to go to.
  • Call your airline's customer service line only after checking online first, because phone lines get congested during widespread delays.
  • A delay of 15 minutes or less may not be officially recorded, so a flight showing "on time" online might still depart a few minutes late.

Use flight tracking sites to see real-time aircraft movement

Flight tracking websites like FlightAware and FlightRadar24 show where your aircraft actually is right now. These sites pull data from radar and aircraft transponders, so they often detect delays before airlines officially announce them. Search for your flight by airline and flight number, or by your departure and arrival cities.

FlightAware shows estimated arrival time, current altitude, and speed. If the aircraft is still on the ground at the departure airport when it should be in the air, or if it is moving slower than normal, a delay is likely. FlightRadar24 displays the aircraft on a map, which helps you see whether it is still at the gate or taxiing.

These sites are free and do not require a login. They are most useful 30 minutes to 2 hours before your scheduled departure, when you can see whether the plane is actually ready to push back from the gate.

Check your airport's website for gate and terminal information

If you are already at the airport or heading there soon, your airport's website lists delays by gate and terminal. Search for your airline and flight number. The airport site shows whether your gate has been assigned, whether it has changed, and whether there is a delay posted at that gate.

Airport websites update less frequently than airline sites—usually every 30 to 60 minutes—but they are useful for confirming which terminal you need and whether to head to the gate yet. Some airports also post delays on departure boards throughout the terminal, which you can see in person.

Call your airline only if online tools do not answer your question

Your airline's customer service phone line is staffed by people who have the same information you can see online. During a widespread delay, hold times can exceed 45 minutes. Call only if you need to rebook a flight, request a refund, or ask about compensation—not to check whether a delay exists.

If you do call, have your confirmation number ready. The airline can tell you whether your specific flight is delayed and what the new estimated departure time is. Some airlines also offer callback options through their app or website, so you can request a call instead of waiting on hold.

Understand what counts as an official delay

Airlines do not officially record a delay until the departure time has passed. If your flight was scheduled to leave at 2:00 p.m. and actually leaves at 2:10 p.m., that is a 10-minute delay, but it may not show up on the airline website as a "delay" because it is under 15 minutes. Most airlines only flag delays of 15 minutes or longer in their systems.

This means a flight showing "on time" online could still depart 10 or 15 minutes late. If you are cutting it close with a connection, check the flight tracking sites instead, which show real-time movement regardless of how small the delay is.

Set up alerts so you do not have to check manually

Most airline apps and websites let you turn on notifications for your booked flights. Go to your account settings or your booking confirmation and look for "alerts," "notifications," or "flight status." You can usually choose email, text, or push notification, or all three.

Once alerts are on, you will receive a message the moment the airline updates your flight status. This is more reliable than checking repeatedly, especially if you are busy or away from your phone. Set alerts at least 24 hours before your flight so you catch any delays announced in advance.

Frequently Asked Questions

How far in advance do airlines announce delays?

Most delays are announced 1 to 3 hours before departure, though some are known the night before. Weather delays are often announced earlier because forecasts are available further out. Mechanical delays may not be known until the crew arrives and inspects the aircraft. Turning on alerts means you will know as soon as the airline does.

Can I see a delay if I booked through a travel website like Expedia?

Yes, but check your airline's website directly instead of the travel site. Travel booking sites pull information from airlines but sometimes update slower. Your airline's app or website always has the most current status. You can search by confirmation number even if you do not have your airline's account set up.

What should I do if my flight is delayed and I have a connection?

Contact your airline when ready through the app or by phone. If your first flight is delayed enough that you will miss your connection, the airline can rebook you on the next available flight to your final destination at no extra cost. Do not wait until you land; call as soon as the delay is announced.

Do I get money back if my flight is delayed?

That depends on the airline's policy and the reason for the delay. Most U.S. airlines do not legally owe you money for delays, though some offer travel credits or meal vouchers. Check your airline's website for its delay compensation policy. International flights have different rules depending on which country's regulations explore.

Why does my airline app show a different time than the airport website?

The airline app shows the airline's estimated departure time, while the airport website shows the airport's last-known gate time. These can differ by a few minutes because the airport updates less often. Trust your airline's app for the most accurate estimate, since that is where the crew reports actual departure.