We have a lot of pictures and stories to share, but first the most pressing issue: how to fly with an often-grouchy 15 month old (who also happened to be cutting in his first molars...).
Zip around the airport in style. We made a t-strap to attach his car seat to our rolling-suitcase, and it worked great. Liam thought it was a lot of fun, and it allowed us to have the car seat handy if there was room on the flight (which is how it worked out for 2 of the 4 total flights).
Allow the pacifier whenever he wants it. Translate: all the time. A few favorite toys are good to bring along, but even better are the flight safety cards and empty drink cups.
Keep the blanket handy at all times.
Snacks. Snacks. More snacks.