Very close to Huntingdon....A1 is good these days, now it's a four-laner; biggest problem is the A14, between 0730 and 0900 it's a car park between Huntingdon and Cambridge.
M11's a bit of a pig at STN until the new flyover gets finished, but I reckon in the long term Peterborough's a reasonable proposition, as long as you don't mind getting through a few cars..I've been at STN since 1988;
88-90 Cortina 1.6 (blew up the engine)
90-91 Cavalier Diesel (got T-boned and written off)
91-96 another Cav (wrote it off on an LHR trip)
96-00 Peugeot 405 Diesel (traded it in for......)
00-02 another one but Turbo'd (crashed that too, courtesy of a French truck just North of STN, but got it repaired)
02 406 Turbodiesel (haven't broke it yet!)
Total mileage about 500,000 in commuting!
Don't see why the airline would mind as long as you arrive on time for your planning!!