How to Find Your Flight Number Before and After You Book

Where to find your flight number on your confirmation email

Your flight number appears on the confirmation email your airline sends after you book. Open the email from the airline (not from the travel website where you bought the ticket) and look for a section labeled "Booking Reference," "Confirmation Details," or "Flight Information." The flight number is usually a two-letter airline code followed by three or four digits — for example, AA 1247 for American Airlines or DL 502 for Delta.

If you cannot find the confirmation email, search your email inbox for the airline's name or the word "confirmation." Check your spam or promotions folder as well. The confirmation email typically arrives within minutes of purchase, though it can take up to an hour.

Key Takeaways

Your flight number is on your airline confirmation email in a section labeled "Flight Information" or "Booking Details," formatted as two letters plus three or four numbers.
If you booked through a travel website, the airline's own confirmation email contains the flight number, not the travel website's email.
Your airline's website lets you look up your flight number using your booking reference and last name, even if you lost the email.
At the airport, your flight number appears on the departures board and on your boarding pass once you check in or print it at home.
If you only have a booking reference number, the airline can retrieve your full flight details by phone or through their website.

Finding your flight number on the airline's website

If you cannot locate your confirmation email, go to your airline's website and look for a "Manage My Booking" or "Check My Reservation" link. You will need two pieces of information: your booking reference (a six-character code from your confirmation) and the last name on the ticket. Enter these details and the airline will display your full itinerary, including the flight number.

Most major airlines — United, Southwest, American, Delta, JetBlue, and others — have this tool on their homepage. The process takes less than a minute. Write down or screenshot your flight number once you find it, since you may need it to track delays or contact the airline.

Retrieving your flight number from a travel booking site

If you booked through a third-party site like Expedia, Kayak, or Google Flights, your confirmation email from that site may show the flight number. However, the most reliable source is still the airline's own confirmation email, which should have arrived separately.

If you only have access to the travel site's confirmation, log back into your account on that website and find your booking history. Click on the reservation to view the full details, which should include the flight number. You can also call the airline directly with your booking reference, and they will provide the flight number over the phone.

Finding your flight number on your boarding pass

Once you arrive at the airport or check in online, your boarding pass displays your flight number prominently at the top. If you checked in online and printed your boarding pass at home, the flight number is in the upper left corner. If you printed it at the airport kiosk or received a mobile boarding pass on your phone, the flight number appears in the same location.

The departures board in the airport terminal also lists flight numbers next to each destination and departure time. Look for your airline and destination, and the flight number will be displayed there. This is useful if you need to confirm your flight number while at the airport.

What to do if you cannot find your booking reference

If you have lost both your confirmation email and your booking reference, call the airline's customer service line directly. Have your full name, date of birth, and departure date ready. The airline can look up your reservation using this information and provide your flight number and all other booking details.

You can also visit the airline's ticket counter at the airport with your ID and passport. The agent will pull up your reservation and print a new boarding pass, which will show your flight number. This method works even if you have no documentation at all.

Understanding flight number formats across different airlines

Every airline uses a two-letter code followed by numbers. The two letters are the airline's IATA code — a standardized identifier used worldwide. American Airlines is AA, Delta is DL, United is UA, Southwest is SW, and JetBlue is B6. The numbers that follow identify the specific flight on that route.

Some airlines use three-digit numbers (like AA 100), while others use four digits (like DL 1502). A few regional carriers may display their code differently, but the format is always letters plus numbers. Once you know your airline's two-letter code, you can spot your flight number quickly on any document or screen.

Using your flight number to track delays and status

Once you have your flight number, you can track your flight's status on the airline's website, on flight tracking sites like FlightAware or FlightRadar24, or through the airline's mobile app. Enter your flight number and departure date, and the site will show you the current status, any delays, and the estimated arrival time.

You can also use your flight number when calling the airline to ask about delays or changes. Having the flight number ready makes the conversation faster and ensures you are discussing the correct flight if you have multiple bookings.

Frequently Asked Questions

Is my flight number the same as my booking reference?

No. Your booking reference is a six-character code (like ABC123) that identifies your reservation. Your flight number (like AA 1247) identifies the specific aircraft and route. You need the booking reference to look up your reservation, but the flight number is what appears on your boarding pass and the airport departures board.

Can I change my flight if I only have the flight number?

You will need your booking reference or confirmation number to change your flight, not just the flight number. However, if you have your booking reference, you can use it along with the flight number to contact the airline and request a change. Call the airline or use their website's "Manage My Booking" tool.

What if two flights have the same number on the same day?

This is extremely rare. Airlines assign unique flight numbers to each departure on a given route and date. If you see the same number listed twice, one is likely a different date or a connecting flight. Always confirm the departure time and destination along with the flight number to be certain you have the right flight.

Do I need my flight number to check in at the airport?

No. You can check in with just your ID and passport. However, having your flight number or booking reference ready speeds up the process. If you check in online before arriving at the airport, you will receive a boarding pass that displays your flight number.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.