all depends... when i've been on first flights of the day, esp when spirit and ata all have flights goign out with the DTW, MSP and MEM flights... i've seen it all the way out to the baggage carousel... 30 min should be ok for an 8:30... but I wouldnt push it much more than that. Remember, it's summer and lots of kids, baby strollers, etc that can really crunch the line.