Probably on the flight. It's tough to tell since they didn't really have to worry about it. In previous seasons, missing a flight usually meant getting on the next flight and you were as much as 2 hours behind. The problem this season seems to have been that there have been several missed flights that ended up costing a day or more. Recovering from 2 hours happens all the time. Recovering from a day isn't so easy.
The flight wasn't very full from what I saw, so going standby on the next flight probably wouldn't have been a big deal, but there wasn't any indication of when the next flight would have been. There was a catch-up point, so even if they had to wait for the next morning, it probably wouldn't have been as bad as some this season have been.
I would have thought that even with the 1/2 hour to deliver the care package, it would have been faster, but apparently it wasn't since all of the teams that did the cleaning were ahead of Charla and Myrna. I think Charla and Myrna still made the best choice for them, though. Charla's lack of height would have really hurt them trying to clean the flap. The other teams looked like they kept switching who was scrubbing, so I'm guessing that was very tiring.
I noticed the same thing about Danny in the roadblock. The guy was always visible, but right before Danny found him, it seemed like he stood out more. The sun might have shifted, but... I think the tag-along guy was starting to really get impatient with Charla. Although, I also wonder if there was specific "rules" as to when they had a tag-along. Danielle had the same problem as Charla, but once she had someone point out to her what she was doing wrong, she was fine. Charla, on the other hand, was told at least 5 times to not touch the buttons and/or screen.
There are a few of the teams that have already gone home that I would have liked to have seen win over Eric and Danielle, but of the three final teams (or 4, for that matter), they are the only ones that I feel are deserving in terms of personality. The beauty queens have really been hitting the challenges hard recently, so I think they have the best chance of winning. I just can't stand how arrogant they always seem.