If you are positive that your baby did not ingest a non food item causing an obstruction of the GI tract you can offer your baby some boiled chicken and rice. This will help sooth her tummy as well as safely giving her plain pepto bismol to help with the diarrhea and gas. The published dose for Pepto is 1 - 3 mg/kg DIVIDED over the course of the day. Using the middle of the range, this is the equivalent of about 1 ml/lb, but this should be divded over the course of the day, One teaspoon = 5 ml; 1 table spoon = 15 ml.
You can also offer her some plain pedialyte to help aid in hydration. You can either mix it with her water 50/50 or give her small amounts via dropper. :)
This all could be from the stress of the flight along with a dog food she is not used to. Good luck and I sure hope your little one feels better very very soon. :)
If she shows symptoms of vomiting, very tender around the abdomen, lethargy, or fever over 103, you will need to see the vet with her. :)