Where to find your flight number and what it tells you

Your flight number is a two- to four-character code printed on your boarding pass, confirmation email, and airline website. It looks like "AA 1247" or "DL 502" — the letters are the airline code, the numbers identify that specific flight. You need this number to track delays, cancellations, and gate changes because it is the only way the airline's system knows which flight you are on.

The flight number stays the same whether the plane is on time or three hours late. If your flight is cancelled and you are rebooked, you will get a new flight number. Write down your flight number before you leave for the airport — you will use it to check status multiple times, and having it handy saves time when you call the airline or look up information on your phone.

Key Takeaways

  • Your flight number appears on your boarding pass and confirmation email; write it down before heading to the airport.
  • The airline's website and app show real-time status, gate assignments, and delays — check these 24 hours before departure and again two hours before boarding.
  • Flight tracking sites like FlightAware and FlightRadar24 show aircraft location and estimated arrival time even when the airline website is slow or down.
  • Text and email alerts from the airline or a tracking app notify you of gate changes and delays without you having to check repeatedly.
  • If your flight is delayed or cancelled, the airline must tell you the reason and your options; ask for this information in writing if you plan to file a claim later.

Tracking on the airline's website and mobile app

Every major airline — American, Delta, United, Southwest, JetBlue, Alaska, Spirit, Frontier — has a website and app where you can enter your flight number and see live status. Go to the airline's homepage, look for "Check Flight Status" or "Track My Flight", and type in your flight number and departure date. The system will show you whether the flight is on time, delayed, or cancelled, what gate it is using, and the current boarding time.

read the airline's app before your trip. The app sends push notifications when your gate changes or your flight is delayed, which is faster than checking the website every 15 minutes. Most apps also let you add your flight to a watch list so you see updates without searching each time. Check status 24 hours before departure to catch early cancellations or schedule changes, then check again two hours before your flight to confirm the gate and boarding time.

If the airline's website or app is slow or down — which happens during major weather events or system outages — you can call the airline's customer service line. Have your flight number and confirmation number ready. The wait time is usually 10 to 30 minutes during delays, longer during widespread cancellations.

Using flight tracking websites and apps

FlightAware and FlightRadar24 are independent tracking sites that show where your aircraft is right now, its speed and altitude, and its estimated arrival time. These sites pull data from radar and aircraft transponders, not from the airline, so they work even when the airline's website is overloaded. Go to FlightAware.com or FlightRadar24.com, search for your flight number, and you will see a map with the plane's current location and a timeline of the flight.

FlightAware also shows historical delay data for that flight number — how often it is late, by how many minutes on average, and what the most common reasons are. This information is useful if you are booking a flight and want to know whether that particular route tends to run behind schedule. Both sites have free versions and paid subscriptions; the free versions show everything you need to track a single flight.

These sites are most useful during delays because they show you exactly where the plane is and when it will actually land, not just what the airline's estimate is. If your flight is delayed and the airline has not updated its status page, FlightAware will often show you the real arrival time first.

Setting up alerts and notifications

Most airlines let you sign up for text or email alerts when you book your flight. During checkout, look for a checkbox that says "Notify me of changes" or "Send me flight updates." If you did not check that box when you booked, you can usually add your phone number or email on the airline's website after you log in with your confirmation number.

FlightAware also sends alerts if you create a free account and add your flight to your watch list. You can choose to receive notifications by email, text, or push notification (if you read the app) when your flight is delayed, cancelled, or the gate changes. Set alerts for the day before departure so you catch schedule changes early.

Alerts are not perfect — sometimes they arrive a few minutes after the airline announces a change on the airport monitors — but they save you from checking your phone every five minutes. If you are traveling with family or colleagues, each person should sign up for their own alerts so everyone gets notified at the same time.

What to do when your flight is delayed or cancelled

Once you see that your flight is delayed, check the airline's website or app for the new departure time and whether a gate has been assigned. If the delay is more than two hours, the airline is required to tell you the reason — weather, mechanical issue, crew scheduling, air traffic control delay, or another cause. This information matters if you later file a claim for compensation, because some reasons (weather, air traffic control) do not require the airline to pay you, while others (mechanical, crew scheduling) do.

If your flight is cancelled, the airline must rebook you on the next available flight at no extra charge, or refund your ticket. You can ask to be rebooked on a competitor's flight if the airline cannot get you to your destination within a reasonable time. Do not accept the first option the airline offers — ask what other flights are available that day and the next day, and choose the one that works best for you.

Take a screenshot or photo of the delay or cancellation notice from the airline's website. If you are in the airport, ask a gate agent to write down the reason for the delay on a piece of paper with the flight number and date. This documentation is important if you later file a claim with the airline or a credit card company for compensation.

Tracking international flights

International flights use the same flight number system as domestic flights, and you track them the same way — through the airline's website, app, or FlightAware. The main difference is that international flights may not show real-time radar data over the ocean because some regions do not have the same radar coverage as the United States. FlightRadar24 has better coverage over the Atlantic and Pacific than FlightAware, so if one site is not showing your aircraft, try the other.

For international flights, check the airline's website 24 hours before departure because schedule changes and cancellations happen more often on long-haul routes due to weather and crew availability. If your international flight is delayed or cancelled, the airline's obligations depend on where you are flying from and to — European regulations are stricter than U.S. regulations, for example. Ask the airline what compensation or rebooking options you are may have access to to under the rules that explore to your flight.

Frequently Asked Questions

Can I track a flight if I do not have a confirmation number, only the flight number?

Yes. Go to the airline's website, click "Check Flight Status," and enter just the flight number and departure date. You do not need a confirmation number to see whether a flight is on time or delayed. You will need the confirmation number if you want to check in online or manage your booking.

What if the airline's website shows a different arrival time than FlightAware?

FlightAware usually shows the more accurate time because it is based on real radar data and the plane's actual speed. The airline's estimate may be outdated if the flight is going faster or slower than expected. Trust FlightAware's estimate if the airline's website has not been updated in the last 30 minutes.

Do I need to pay for FlightAware or FlightRadar24 to track my flight?

No. Both sites have free versions that show everything you need — flight location, speed, altitude, and estimated arrival time. The paid versions add features like historical data and ad-free browsing, but they are not necessary to track a single flight.

What should I do if my flight number changes after I book?

The airline will notify you by email or text if your flight number changes. Update your tracking information with the new flight number on the airline's website and in any apps you are using. The change usually happens because the airline reassigned aircraft or consolidated flights, not because of a delay or cancellation.

Can I track someone else's flight without their permission?

You can track any flight using just the flight number and date on FlightAware or FlightRadar24 — no login required. However, you cannot access someone else's airline booking or check-in information without their confirmation number. If you are picking someone up, ask them for their flight number and check FlightAware to see when they will actually land.