This question already has an answer here:

My family and I took a flight on Jet Blue last February and I need to find the flight number and ticket number so I can claim my points.

marked as duplicate by CGCampbell, Giorgio, Willeke, Jim MacKenzie, Newton Feb 19 '18 at 15:31

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • @JanDoggen Doesn't seem to be a duplicate. The information there might get the flight number but it won't help with the ticket number. – David Richerby Feb 14 '18 at 15:39

Assuming the number hasn't changed - you could find that same flight on Flight Radar 24 and it will tell you the number.

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