Originally Posted by
swag
Public transit means the E-2 bus, but it only runs into downtown NOLA weekdays before 6 pm. It's about a 45 minute ride, and runs roughly every half hour or so. If you're staying near the downtown stop at Tulane & Loyola, and at $2.00, it's not a terrible ride. I'd advise against it at other times, when a transfer is needed to complete the journey to downtown.
Jefferson Transit
I'll update because I forgot the other option, the RTA 202 airport bus. The last 202 bus leaves the airport at 7 pm, and may be a reasonable option for a 6 pm flight arrival, if you can't catch the last E-2 at 6:14. The 202 terminates at Elk/Canal, aboit a block from the E-2 terminus.
https://www.norta.com/Maps-Schedules...ne.aspx?ID=202