Fairly open availability in Aug/Sept (and sporadic availability elsewhere). I could not manage to find an outbound routing with the babybus, but the return seems widely available. Good TP opportunities if you play around with the dates. 820 TPs using the below routing if I am not mistaken.
Sample:
https://www.google.com/flights#flt=R...8*2.GBP.150298
Similar price from GOT/ARN via HEL/LAX (using Finnair A350). Also available from AMS for about £70 more with the option to route straight through DFW and use the AA 777 to HNL.
Bookable thru a couple of OTAs. I just called Iberia and ticketed within 5 minutes.