Can I book the same flight as someone else?

Yes. Any seat still for sale on that flight can be bought by anyone. You need the airline, flight number and departure date, then book the same flight in a separate reservation. Your fare may differ from theirs because prices change over time.

How do I know which flight someone is on?

Ask for a screenshot of their confirmation. The airline code and flight number (for example DL 264 or UA 918), the departure date and the two airport codes are all you need. Ignore their name and booking reference — you cannot and should not use those.

Can we sit together if we booked separately?

Usually yes, but it is not automatic. Call the airline and ask them to link or cross-reference the two reservations, then pick adjacent seats on the seat map. If seats are not assignable in advance, ask at check-in or at the gate.

Can I book a flight for someone else?

Yes. Airlines let you buy a ticket in another person's name — you just enter their full name exactly as it appears on their passport or ID, plus their date of birth. The payment card does not need to match the passenger.

How to book the same American Airlines flight as someone else

To get on the same American Airlines flight as someone else, search their route and date, filter to American, and match the flight number (AA plus digits) and departure time. After booking, call American on 1-800-433-7300 with both record locators and ask the agent to link the reservations so the two bookings travel as one party.

Finding the flight

Get the flight number and departure date from their confirmation — for example American Airlines flight number plus the date. A screenshot is enough.
Search the same route and date on aa.com or on Google Flights, and filter the results to American Airlines.
Match the scheduled departure time, then expand the itinerary and check that the flight number is identical. Same number, same date, same aircraft.
Book your own ticket. It will be a separate reservation from theirs.

American specifics

Linked records. American agents can cross-reference two record locators. This does not merge them — you each keep your own ticket — but it flags you as travelling together, which helps with seating and rebooking if the flight is disrupted.
Seat selection. Standard Main Cabin seats are generally free to select at booking. Preferred seats (better location, standard legroom) and Main Cabin Extra carry a fee unless you have AAdvantage status.
Basic Economy. American's Basic Economy does not include complimentary advance seat assignment; you can sometimes pay to pick a seat, otherwise it is assigned at check-in. Changes are heavily restricted.
Same-day flight change. American allows a same-day change to another flight on the same route and date, bookable from 24 hours before departure, subject to availability. It is complimentary for elite members and on some fare types, otherwise a flat fee. Basic Economy is not eligible.
American Eagle and oneworld codeshares. Four-digit AA numbers are usually regional operators, and AA numbers in the 6000s and 7000s are typically codeshares operated by partners such as British Airways or Iberia. Search the operating carrier's own number.

Pitfalls

Fares differ between bookings made at different times, seats may not be adjacent, and a codeshare confirmation can name an airline that is not the one flying the aircraft. If you are unsure which is which, start from the general same-flight guide.

The faster way

SameFly does the matching for you: drop in a screenshot of their confirmation and it reads the airline, flight number, route and date, then sends you straight to that exact flight. It is free, no account is needed, and the image is never stored.

Drop a screenshot of your flight confirmation

Drag & drop, click to browse, or paste with ⌘/Ctrl + V

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Common questions

Can I book the same flight as someone else?: Yes. Any seat still for sale on that flight can be bought by anyone. You need the airline, flight number and departure date, then book the same flight in a separate reservation. Your fare may differ from theirs because prices change over time.
How do I know which flight someone is on?: Ask for a screenshot of their confirmation. The airline code and flight number (for example DL 264 or UA 918), the departure date and the two airport codes are all you need. Ignore their name and booking reference — you cannot and should not use those.
Can we sit together if we booked separately?: Usually yes, but it is not automatic. Call the airline and ask them to link or cross-reference the two reservations, then pick adjacent seats on the seat map. If seats are not assignable in advance, ask at check-in or at the gate.
Can I book a flight for someone else?: Yes. Airlines let you buy a ticket in another person's name — you just enter their full name exactly as it appears on their passport or ID, plus their date of birth. The payment card does not need to match the passenger.