I AM INTERESTED IN DOING A MILEAGE RUN PREFERABLY FROM EFD (ELLINGTON FIELD-HOUSTON) AND ENDING AT SJT (SAN ANGELO). I HAVE TRIED TO MAKE THE PROPER CONNECTIONS AND HAVE GREAT DIFFICULTY. CAN ANYONE OFFER THE KITTY CAT PILOTS SOME HELP. THEY CAN REALLY USE THE MILES.
I would try www.expedia.com and select Flight Wizard. The Flight Wizard should allow you to book the routing you mentioned. If you have the need for multiple cities, then use the Multiple Stops Search. Also, the Airline Fare List on that site will offer you the best roundtrip fare between any two cities. I use it all the time.
If you are on CO and expecting to get the 500 mile minimum or segment credit from Ellington to IAH or HOU, or between IAH and HOU, best call CO ahead of time. I think their fine print does not allow frequent flier miles between these particular airports.