From Streatham train to London St. Pancras, train to Luton Airport Parkway Rail Station, then line 888 bus to Airport Bus Station. 1hrs 06min £24. From StreathamSt.Leonard's Church bus to Brixton Academy (SW9), line 2 bus to Lisson Grove, Dorset SquareBaker Street Stn, then bus to Airport Bus Station. 1hrs 53min £9. From Streatham taxi to London Luton. 1hrs 11min £119.