From Wood Green Underground Station Tube to Finsbury Park Underground Station, Tube to London Euston, then train to Watford Junction. 41 min £9. From Wood Green, Park Avenue Wood Green line 221 bus to Edgware then line 142 bus to Watford Junction Railway Station. 1 h 40 min £3. From Wood Green taxi to Watford Junction Station. 21 min £71. From Wood Green drive to Watford Junction Station. 21 min £3.