If I may . . . I fly a fair amount with firearms (maybe 12 flights a year) and I've been flying with firearms since the Eighties (so I've seen a lot of changes in required procedures - believe it or not, it use to be okay to have it loose in the bag and they used to just stick the orange...
+1 for the Hogue BRG suggestion made earlier. Here's a from-the-rear photo of a P938 with the BRG (please ignore the G43) that may be illustrative of how these stocks might help your grip overcome the issue.
Just FWIW, I've only shot the P938 with the Hogue Black Rubber Grip stocks and have...
Alpha Wolf Canada-length barrel together with VV 3N38 147-gr HST handloads gives the ordinarily small Glock 43 an 1150 fps payload that turns it into a sweet lightweight hiking companion for the high desert.
I've had a number of these over the years. I'm surprised to report that the one that gets the most carry is the Beretta Nano - surprised that it shoots so well for me, since its trigger appears to have been developed from a staplegun. Fabulous deal at $199.99 brand new after rebate from Palmetto...