Using ViewModels and Partial View with asp.net mvc

Start by creating view models that represent what you want to display/edit in the view

public class TicketVM
{
  public int TicketID { get; set; }
  public string Description { get; set; }
  public decimal Price { get; set; }
  public int Quantity { get; set; }
}
public class OrderVM
{
  public int ID { get; set; }
  public int EventID { get; set; }
  public string EventName { get; set; }
  // additional properties of Event you want to display
  public DateTime OrderDate { get; set; }
  public string FirstName { get; set; }
  // additional properties of Order and OrderDetails you want to edit
  public List<TicketVM> Tickets { get; set; }
}

Side note: Its a bit unclear why you have separate models for Order and OrderDetails, or why OrderDetails has public int TicketID { get; set; } which suggests an Order can only have one ticket so I suggest you may need some changes to your database structure. If the intention is that a user can order multiple tickets for different people, then the name, email and phone of each ticket holder should probably be stored in the TicketsOrdered table (and those properties added to the TicketVM class)

The view would then be (assuming its for a Create method)

@model TicketVM
@using (Html.BeginForm())
{
  @Html.HiddenFor(m => m.EventID)
  <h2>@Model.EventName</h2>
  // other display properties of event
  @Html.TextBoxFor(m => m.OrderDate)
  @Html.TextBoxFor(m => m.FirstName)
  // other edit control for properties of Order and OrderDetails (see note above)
  @Html.EditorFor(m => m.Tickets)
  <input type="submit" value="Save" />
}

and the EditorTemplate for TicketVM (in /Views/Shared/EditorTemplates/TicketVM.cshtml)

@model TicketVM
@Html.HiddenFor(m => m.TicketID)
@Html.DisplayFor(m => m.Description)
@Html.DisplayFor(m => m.Price)
@Html.TextBoxFor(m => m.Quantity)

Then the controller methods would be (note you have not shown you Event model so adjust the following to suit)

public ActionResult Create(int ID) // assumes ID is the ID of the Event
{
  // Get the event and its tickets
  Event e = db.Events.Where(e = e.EventID = ID).Include(e => e.Tickets);
  // Initialize a new order
  OrderVM model = new OrderVM
  {
    EventID = e.EventID,
    EventName = e.EventName,
    // other properties of event as required
    Tickets = e.Tickets.Select(t => new TicketVM
    {
      TicketID = t.TicketID,
      Description = t.Description,
      Price = t.Price
    })
  };
  return View(model);
}
[HttpPost]
public ActionResult Create(OrderVM model)
{
  if (!ModelState.IsValid)
  {
    // repopulate any properties as required
    return View(model);
  }
  // Initialize an Order data model, save it and gets its ID
  Order order = new Order
  {
    OrderDate = model.OrderDate,
    // other properties of Order
  };
  db.Orders.Add(order);
  db.SaveChanges();
  // ditto for OrderDetails (but see notes above)

  // Initialize an TicketsOrdered data model for each valid ticket
  foreach(TicketVM ticket in model.Tickets.Where(t => t.Quantity > 0))
  {
    TicketsOrdered ticketOrder = new TicketsOrdered
    {
      OrderID = order.ID,
      TicketID = ticketOrder.TicketID,
      Quantity = ticketOrder.Quantity
    }
    db.TicketsOrdered.Add(ticketOrder);
  }
  db.SaveChanges();
  return RedirectToAction(...);
}