Go for it. I've seen several people do this and it seems to be fine -- just make sure there's enough space based on the size of your kid. (With a <6 mo. baby it seems straightforward; a 2-year-old would be another matter.)
People Also Ask
When can you travel on a train with a baby? Basically as soon as you're ready to take your baby out in public you can take them on a train. However, you should talk to your pediatrician before taking a long train trip with your newborn, since infants are more vulnerable to infections.
The best time to fly with kidsWhile you can't always fly at the optimal time (based on your child's age, that is), it's great when you can. The best times, most agree, are between three and nine months, when kids aren't yet mobile, and any time after age two or three.