I would respectfully disagree with the both the initial and the use-the-airport-code suggestions. Instead, I’d propose that the author of a trip report provide a title that best suits the report and its intended audience.

I count myself among those FlyerTalkers who are as much (or more) interested in destinations as in the flights to those destinations. That is, I (we) generally perceive getting to and from as a means to an end, not an end in itself. Consequently, some trip reports in this forum focus on being there rather than getting there. So, if 90% of my trip report is about the sociocultural grandeur of Dubuque and the rest about my unremarkable flights on Ozark Airlines, I would want to be able to entitle my trip report appropriately without catching the opprobrium of The Rules Kommittee.

Now there are certainly occasions when I would wish to include airlines and airports in my title. Although I recognize that the wizened veterans of FlyerTalk will surely know which cities are represented by FDH and FMO (to choose 2 that are on the current first page but that are mysteries to this typist), I also recognize that some FlyerTalkers are novices and might not know those codes, or maybe even SVO or STN. So if I think that novices might be interested in my report, I'd prefer the option of spelling out the city/airport name.

On the other hand, when a report focuses on one or more airline and its/their product in a certain class of service, then zrs70's suggestion makes sense.