I recently booked reward flight with United Points. The booking for myself is in the name Rossgordon Welsh instead of Ross Gordon Welsh. Do you think this will cause problems at check in? I am flying a combination of Thai, Singapore & Malaysian airlines.
No you will be fine; airlines do not allow punctuation or spacing in names, so it has to run first and middle names together like that.
As always, the only way to get 100% certainty of that would be to call the airline direct, but I’m a travel agent and book a dozen tickets a day for the last however many years and based on what you’re describing, any airline would do that and you’ll be fine.