Why is that? is it that crazy?
Look at other airports across Europe that are of a similar size to BHX that are not tourist destinations for comparison...
Dusseldorf (DUS): 20,040,193 pax - Seasonal Charter to MBJ Only
Budapest (BUD): 17,526,000 pax - No TATL Flights
Luton (LTN): 16,735,984 pax - No TATL Flights
Bucharest (OTP): 15,946,791 pax - 4x weekly flights to JFK Only
Hamburg (HAM): 14,830,000 pax - No TATL Flights
Birmingham (BHX): 12,848,201 pax - Year-Round CUN/MBJ and Seasonal BGI/LRM/PUJ
Marseille (MRS): 11,167,485 pax - Daily flights to YUL Only
Lyon (LYS): 10,248,000 pax: - Daily flights to YUL Only
There are capital cities in Europe that carry millions more pax than BHX that don't have direct flights across the Atlantic, even to the most popular tourist destination. BHX at least has 5 routes across the Atlantic with TUI. All of the above airlines have just one route if that!