Where to find your flight number after you've flown

Your past flight number appears on your airline confirmation email, your boarding pass (paper or digital), and your airline account under past bookings. If you no longer have the email or boarding pass, log into your airline account directly — every major carrier stores your flight history there, searchable by date or destination. You can also call the airline's customer service line with your name and the approximate travel date, and they will pull up the flight number in seconds.

The flight number itself is a two-letter airline code followed by one to four digits — for example, United 1247 or Southwest 4891. It appears on every document connected to that flight, so if you have any record of the trip at all, you have the flight number nearby.

Key Takeaways

  • Your airline account is the fastest source: log in, find the trip by date, and the flight number is listed with all other booking details.
  • Your confirmation email from when you booked contains the flight number and stays in your inbox even after the flight has passed.
  • If you have your boarding pass — paper, screenshot, or PDF — the flight number is printed at the top or bottom.
  • Calling the airline with your name and travel date will retrieve the flight number within minutes, even if you have no documents.
  • Third-party booking sites like Kayak, Expedia, or Google Flights show your past bookings if you used the same account to reserve the ticket.

Checking your airline account online

Every major airline — United, American, Delta, Southwest, JetBlue, Alaska, Spirit, Frontier — has a "My Bookings" or "Manage My Booking" section on its website. Go to the airline's homepage, look for a link near the top that says "Manage Booking" or "My Trips," and enter your confirmation number and last name, or log in with your frequent flyer account if you have one.

Once you are in, you will see a list of all your past and upcoming trips. Click on the trip you are looking for, and the flight number will be displayed alongside the departure time, aircraft type, and seat assignment. This method works even years after the flight has taken place, as long as the airline still has the booking in its system — which they do for at least several years.

If you do not remember your confirmation number, most airlines let you search by last name and email address instead. Some also let you filter by date range, which is helpful if you remember the month but not the exact day.

Finding your confirmation email

When you booked your flight, the airline or booking site sent you a confirmation email. Search your email inbox for the airline name, your destination city, or the word "confirmation." The email will have a subject line like "Your flight confirmation for [City]" or "Booking confirmation — [Confirmation Number]."

Open the email and scroll to the itinerary section. The flight number is listed there, usually next to the departure time and date. If you booked through a third-party site like Expedia or Kayak, the confirmation email came from that site, not the airline, but it still contains the flight number.

If you cannot find the email, check your spam or promotions folder — confirmation emails sometimes land there by mistake. You can also search by the airline name or a keyword like "flight" or "itinerary" to narrow the results.

Using your boarding pass

Your boarding pass — whether you printed it, saved it as a PDF, or took a screenshot on your phone — displays the flight number prominently. On a paper boarding pass, it is usually at the top left or top right, printed in large text. On a digital boarding pass in an airline app or email, it appears in the same location.

If you saved your boarding pass as a file, search your computer or phone for PDFs or images from the travel date. If you took a screenshot, look in your phone's photo library under the date you flew. The flight number will be visible in the image.

Calling the airline directly

If you have no documents and cannot access your airline account, call the airline's customer service number. You will find it on the airline's website or on your credit card statement if you paid by card. Have your name, the approximate travel date, and your destination city ready.

Tell the representative you need the flight number for a trip you took on a specific date. They will ask for your name and either your confirmation number or the date and destination. Within a minute or two, they will have the flight number on their screen and can read it to you. This method works even if the flight was months or years ago.

Checking third-party booking sites

If you booked through Kayak, Expedia, Google Flights, Orbitz, or another third-party site, log into that site with the same account you used to book. Look for a section called "My Trips," "Bookings," or "Past Bookings." Click on the trip, and the flight number will be displayed.

This works only if you used an account on that site — if you booked as a guest without creating an account, the site will not have a record you can access. In that case, go back to your confirmation email from the booking site, which will have the flight number listed.

What to do if you still cannot find it

If you have tried the methods above and still do not have the flight number, you have two remaining options. First, check your credit card or bank statement from the date you booked or flew. The airline name will be listed, and you can use that to narrow your search in your email or airline account.

Second, contact the airline one more time with as much detail as you can provide: your name, the exact date you flew, the departure and arrival cities, and the time of day you flew. The more specific you are, the faster the representative can find your booking. They may also ask for your frequent flyer number if you have one, which speeds up the search.

Frequently Asked Questions

How long do airlines keep booking records?

Most airlines keep booking records for at least five to seven years, and some keep them indefinitely. You can usually find your flight number even years after you flew, as long as you have your name and the approximate travel date. If the airline has deleted the record, your confirmation email is your backup source.

Can I find a flight number if I do not have a confirmation number?

Yes. Log into your airline account with your frequent flyer number or email address, or call the airline with your name and travel date. Both methods let you search without a confirmation number. The airline's system is indexed by passenger name and date, so you do not need the confirmation number to retrieve the booking.

What if I booked through a travel agent?

Contact the travel agent directly — they have a copy of your booking and can provide the flight number when ready. If you no longer have contact information for the agent, check your confirmation email, which usually lists the agency name and phone number. You can also try logging into the airline account directly using your name and travel date.

Is the flight number the same as my confirmation number?

No. Your confirmation number is a code the airline assigns when you book — usually six characters like "ABC123." Your flight number is the airline's designation for that specific flight — like "United 1247." Both appear on your confirmation email and boarding pass, but they are different things.

Can I find a flight number if someone else booked the ticket for me?

If the ticket was booked under your name, you can find it using any of the methods above — your airline account, confirmation email, or by calling the airline. If it was booked under someone else's name, you will need that person to provide the confirmation number or log into their airline account, since the booking is tied to the name on the ticket.