Flight
You can fly directly into Cartagena. I recommend watching ticket prices because they have been fluctuating over the past few months. I have seen them drop as low as $300 or $400 round-trip from Chicago. This of course depends on the days of the week you fly in and out. The airport is a short 15 minute car ride to the hotel. There are plenty of cabs lined up outside of the airport. Make sure you have some cash on you! The ride should only cost you about $6.
Travel Note
You can get around most of the old city and outer wall area by foot. It's a great way to see the city and everything is fairly close to each other. If you do need a cab, there are plenty you can grab off of the street or have your hotel call one for you. Be sure to have cash on you since they don't take cards in the cabs. Cab fare is relatively cheap (much cheaper than Chicago rates!).
House Or Rental
There are plenty of Airbnb options in Cartagena. I would recommend finding one near Casa Pombo located in the old city or in the Getsemani area.
Hotel
This hotel is right next to Casa Pombo, the hotel where we will hold the wedding.
Hotel
This is Casa Pombo's sister hotel. It is a few blocks away from Casa Pombo
Hotel
Hotel
Centrally located in the Old City and close to Casa Pombo
Hotel
Hotel
Hotel
Hotel
Hotel
Hotel