often price matches Spirit, that being said you are probably better off flying NW
as you will have more frequencies, a wider variety of aircraft to choose from (DC-9, A319/A320, or 757 dependent on the flight) vs. Spirit's MD
-80's, and fly in/out of the Worldgateway in DTW
, as opposed to the third-world dump called the LC
Its up to you, whatever price you prefer and whether you have an FF
account. Either way you'd be stupid to not take the nonstop on either one of these airlines.
Actually, I have no idea what the prices are, but American Eagle flies DTW
also with ERJ's. If you want to ride on the jungle jet, then fly them, although unless the price was really good, I'd take the others.