Open the Messages app
Open an existing iMessage conversation or start a new one
Type your flight details in the message field
Include airline, flight number, departure time, arrival time, and airport if needed
Tap the Send button
If available, send a boarding pass or flight confirmation as an attachment
To share live flight details, copy the flight info from your airline app and paste it into iMessage
If you want the recipient to track the flight, send the flight number and airline name
If you have an iPhone with supported features, use the Share Sheet from the airline app to send the flight info directly to Messages