Air
Woodbourne Airport is a domestic airport and is also used by the RNZAF as an operational base. There are direct flights from Wellington, Christchurch and Auckland. Omaka Aerodrome, to the south of the city centre, is used solely by private and vintage aircraft. An airshow (based mainly on World War I and II aircraft) is held at Omaka Aerodrome every two years at Easter.
Road
State Highway 1 runs through Blenheim and State Highway 6 terminates at the junction of the two state highways. Blenheim is notable for a town of its size in that it does not havetraffic lights at any intersection. Instead, roundabouts speed arterial traffic flow. Since the installation of these roundabouts traffic volumes have quickly increased and upgrading options are being considered, e.g. traffic lights, longer two-lane approaches and even a bypass.
Rail
Blenheim is on the Main North Line, the northern part of the unofficially-named South Island Main Trunk Railway. The TranzCoastal, the daily long-distance passenger train between Picton and Christchurch, stops at Blenheim Railway Station.
A major railway classification yard is north of Blenheim at Spring Creek.
The narrow-gauge Blenheim Riverside Railway runs through the town
