Originally Posted by ettrich

I'd like to book the AMS to BKK INCEU60
Has anybody been successful with booking a routing via HEL, so AMS-HEL-LHR-SIN-BKK-SIN-LHR-AMS ?

AMS-LHR-SIN-BKK-SIN-LHR-AMS is fine using ITA Matrix, comes to Euro 1493

Adding HEL so AMS-HEL-LHR to start the trip produces only error messages.
As there are 5 transfers, 2 in Europe oneway allowed, it should/could work.
best regards,
Ettrich