St. Louis to China-town is booked tighter than Tom Thumb's ass.
5 seconds sound clip from the Planes, Trains & Automobiles (1987) movie soundboard.
You can hear this line at 00:40:43 in the Blu-ray version of the movie.
Quote context
[...]
- Why don't you take a picture? It'll last longer.
- I guess this is probably as good a time as any to tell you this.
- Our tickets are only good to St. Louis.
- St. Louis to China-town is booked tighter than Tom Thumb's ass.
- All right. Who knows a tune here? Who wants to sing a tune? Who's got a song?
[...]