I just booked our shuttle ride to the airport for our honeymoon.
Delaware Express ( www.delexpress.com ) has a promotion right now using the code "EXPRESS" for 25% off your shuttle service. This promo is only available by booking online at their website. I don't know how long the code is good for.
If you'd like to use it, click on "Shuttle Reservation" and at the bottom of the screen there's a box for "Frequent User Login". Enter the code in that box.
We needed a shuttle because our flight leaves at 7am the morning after the wedding. We didn't want to make any of our family/friends drive us that early. The promo saved us about $15!
Re: PSA: Delaware Express Shuttle
With the discount, it will cost us $49 one way. I didn't look into taxis, so I don't know the difference in cost. This was the best option for us having several bags plus FI's wheelchair.
We only needed a ride TO the airport, since it's so early. We didn't want to bother friends/family for a ride. However, we come back to Philadelphia at 6pm, so my dad will just pick us up.
I took a taxi from Media, PA, to the airport 2.5 years ago and it was about $25 before tip. I'm sure it would be more now, plus Wilmington is farther than Media.