London Heathrow to Mauritius: WED/FRI/SAT/SUN    
Mauritius to London Heathrow: WED/THURS/SAT/MON     
 
All Air Mauritius flights from Heathrow are overnight flights, return flights on Weds/Sat are day flights and Thurs/Sat there are overnight flights.



London Heathrow to Mauritius: WED/FRI/SUN
Mauritius to London Heathrow: MON/THURS/SAT



All British Airways flights from Heathrow are overnight flights, return flights are all day flights.
Emirates has daily flights from london and other leading UK airports to Mauritius via Dubai.