East Midlands Trains operates a train from Grimsby to Boston every 4 hours. Tickets cost $22 - $35 and the journey takes 53 min. 2 other operators also service this route. Alternatively, Stagecoach in Lincolnshire operates a bus from Grimsby to Boston hourly. Tickets cost $15 and the journey takes 1 h 46 min. Brylaine Travel also services this route hourly.
From Grimsby Town train to Lincoln Central, train to Sleaford, then train to Boston. 3 h 38 min £37. From Ellis Way, Holles Street (Asda) bus to Lincoln, Tentercroft Street then bus to Boston, Spayne Road. 3 h 58 min £21. From Grimsby taxi to Boston. 1 h 3 min £158. From Grimsby drive to Boston. 1 h 3 min £9.