If you didn't catch the listed price, it's a special nod to the first anniversary of Boeing 787 Dreamliner service to the Big Easy by British Airways. To celebrate this event and another big one, the city of New Orleans's 300th anniversary, British Airways will offer this sale fare for purchase through May 10, 2018. Flights are available from September 24 through October 31, 2018. Departures from MSY are available on Mondays and Wednesday, and returns from LHR are valid on Wednesdays through Fridays. There is a 7-night minimum stay required.
Searching on BA.com, I could find seats departing MSY on Wednesday, September 26, and returning from LHR on Friday, October 5, 2018. Other dates can easily be found throughout October.
For those of you wanting to head to NOLA to celebrate its anniversary here is a list of flights from all across the US and Canada to New Orleans (MSY).
Need a room in London? Here's a list of hotels spread all over London for you to choose from on Hotelwatchdog.