Originally Posted by
SK AAR
If you booked with Exp or other OTA you have received an Amadeus PNR and will be able to look up the reservation on Checkmytrip, BA/LH etc. If you booked directly with LA you have received their internal reservation No. and you can't use that outside LA / LA webpage.
Try Tripcase, worked for me last year on LATAM PNR. It schows you the Amadeus PNR.