are you being picked up or hiring a car -- quite an easy journey from liverpool to bolton -- motorway most of the way -- as it is from Manchester... there is a direct train from man airport I am fairly sure to Bolton...
As your in Luton, your best bet is an easy jet flight to liverpool then M'way to Bolton. Both luton and l'pool are small, easy to get in and out of airports. (altho manc is v good for a large airport)
When you get to l'pool M62 then M60 then M61 to Bolton. Very straightforward and easy. Cheaper too!
sparklymieow, have you not got a car, or could you not hire one. From Luton to Manchester the drive will be less than going to the airport, checking in in advance, flying, getting off and to your SIL the other side. It would be cheaper too I am sure. You can hire cars from Easy jet at Luton airport too.
agree with crunchie. We flew from manchester to london last year and after all the checking in time, hanging around and a small delay, plus drive to and from airport, it took about 5 hours! WOuld have been quicker and cheaper to train it or drive.