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This question already has an answer here:

I am a dual British/US citizen and hold both passports. However, my recently renewed US passport has not arrived yet and I leave in 48 hours. Can I get an ESTA and travel on my British passport?

marked as duplicate by Newton, David Richerby, Jim MacKenzie, Giorgio, gmauch Aug 9 '18 at 13:46

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.

  • Where are you flying from? One person posted here that she was unable to do this at a Canadian airport with preclearance. But if you're leaving from an airport without preclearance, you might be able to get away with it. – phoog Aug 9 '18 at 10:03
  • Also maybe related: travel.stackexchange.com/questions/86081/… – Newton Aug 9 '18 at 10:08
  • I am flying from Paris to JFK – yola moniz Aug 9 '18 at 10:12