I think you are drastically underestimating the typical revenue of a long haul or international flight.
A good starting point is RASM, or average revenue per available seat mile. For the airline industry a reasonable benchmark for that is about 15 cents, or so.
So multiply the number of seats on the plane by the number of miles and you'll get something that's at least in the same order of magnitude for passenger revenue on a flight.
Since we know air freight only really makes sense for long distances or over water -- you're going to be using a truck to get medical supplies from Dallas to NYC, and it will take less than 24 hours -- let's pick a good example route:
HKG > LAX on a 767, a standard wide-body
7,243 miles x 375 seats x $0.15 = $406,912.50
So we know the post guessing $30k in passenger revenue for a typical flight is in the wrong order of magnitude.
For the number I kind of picked 15 cents out of my ass, it's a number I've seen in the past year in earnings reports for the majors and it easily gets us into the basic range we're talking about. Just google the terms RASM, PRASM, and CASM and you'll find a ton of info, that's the basic jargon used in the business to come up with info of this type.