public class FlightSearchResults
{
    public FlightSearch SearchModel { get; set; }
    public List<vwLowFareSearchResults> SearchResults { get; set; }
    public string TestString { get; set; }
    public DateTime TestDate { get; set; }
}

FlightSearchResults flightSearchResults = new FlightSearchResults();
flightSearchResults.SearchModel = model;
flightSearchResults.SearchResults = flights;
flightSearchResults.TestDate = DateTime.Now.AddDays(-2);
flightSearchResults.TestString = "Just Testing . . .";
return RedirectToAction("index", "flights", flightSearchResults);

return RedirectToAction("index", "flights", new { SearchResults = flights, SearchModel = model });
return RedirectToAction("Result", "Dialog", new RouteValueDictionary(flightSearchResults));

return View("~/Views/Flights/Index.cshtml", flightSearchResults);