Reports out of South America on Thursday night said a fee has been agreed for £15.8m and that Quintero was on a flight to London Heathrow.
Quintero took a flight From Medellin to Bogota before flying to Heathrow with a ticket for seat 6A according to Colombian reports.
The 21-year-old's agent Maria Elena Chavarro tweeted on Thursday:
"Today @juanferquinte10 travelled to England to sign a contract with Arsenal who are paying 20m Euros (around £15.8m) to FCPorto, congratulations!"
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