There are 3 train companies operating 3 routes - 125 (GW), 52 (FC): Luton - Sutton Loop, MML. The cheapest train costs $43 and is 3h 35min.
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There are 3 ways to travel from Bath to Luton. 2 trains, 4 buses and 1 by car are possible between the two areas. The by car from Bath to Luton is the cheapest. The by car from Bath to Luton is the fastest. The train operated by running from Bath to Luton is the most convenient.
It's important to check each mode when booking your ticket so that you can find the best method for you. The cost of each type varies differently, so be sure to use Faretrotter to keep an eye out!