If you need to travel from Arusha to Dar Es Salaam, there are two main options. You can either fly or you can take a long-haul bus.
Flights run, on average, $150 USD for a one way flight. You’ll also need cab fare to the airport, which, depending on your negotiation skills, can run you anywhere from $10-25 USD as well. All in, let’s call it $175. Not too awful really, and it will likely only take you five hours start to finish to arrive in Dar.
The bus ticket runs approximately 40,500-50,000 shillings, or around $20 USD