Well, I agree you should look at all options when deciding - and cost is only one of them. I just compared pricing for a random April Friday - and the three best for me would have been Ryan Air, Wizz, and well, all the others weren’t good.
I look at date; price; flight times (I usually detest arriving late night); flight length; layovers (length and where); what is included; reliability; cancellation options; and comfort.
For my random April Friday, starting with Google Flights, only Ryan and Wizz had nonstops to Barcelona. Both were acceptable flight times (for ME) - and when I clicked through to the airline website, I could easily see my three levels of choice for inclusions.
I tried out an Iberia flight and could not reach an option to add a cabin or checked bag until after completing my personal details. So much for hidden pricing. Swiss Air initial price on this particular hypothetical day was twice the price of the most expensive of the other two, as was Lufthansa, and neither include a checked bag or prior-to-check-in seat choice in their initial cost.
Another day (weekday?) would undoubtedly be different pricing.
In this hypothetical search, I would absolutely choose Ryan Air or Wizz - the generality of cheaper (by quite a bit) held up. However I recently did a Budapest to Birmingham flight, where I had no flex on dates or times - and I paid more for Lufthansa because, regardless of layovers and price, it fit my needs. So yes, don’t JUST look at prices - but at what you really need and your priorities. But also don’t be afraid of hidden costs on the budget airlines. They may be additional, but I can’t see that they are hidden.
One thing to be checked, though, no matter what choice someone reading this might make, the admonition remains to check on the allowed size of cabin bags (not just weight). That didn’t immediately appear upfront on any of the sites, so would take some further research I didn’t do. And it IS a good reminder that carryon sizes vary between the U.S. major carriers and some of Europe’s domestic carriers.
blackcat unfortunate, since we have actually met, I know you are careful enough to see the details. Once those are acceptable or doable - and if you are able to follow their rules regarding carryon size and weight, you don’t need to worry they will take your carryon away from you for those reasons.
And ALL airlines retain the right to make people gate check if the flight is full. No getting around that. But when this happens, you can be assured your suitcase is on the plane.