Hi Natalie
Sorry to hear of your loss, a very similar thing happened to me so I understand how you feel.
The reason I went abroad is because I needed donor eggs and I wasn't prepared to wait for them in the UK (my consultant even recommended I go to Spain) and I also prefer their attitude and the fact that the donors there are anonymous.
There are lots of good clinics out there, I know Prague is fairly popular as is Greece with Spain probably being the top of the list.
You would probably need to travel out for an initial consultation and then back for the week of treatment, but be aware that you may well also need to line up a clinic in the UK for scans in between times. Make sure that the price you have been quoted includes drugs as this may not always be the case.
It may well be cheaper to travel abroad but it's not always the case - my treatment cost me 10K Euros so certainly not cheaper! You need to take into account the cost of travel and accommodation too.
My biggest piece of advise though is do as much research as you can, make sure you know what you are getting for your money and that you are 100% happy with the clinic you end up dealing with. Going abroad does add a great deal of stress to the situation and remember you are still going to put yourself through a fairly serious medical procedure. Sorry for sounding so serious but it's easy to forget what you are actually putting yourself through and you need to make sure you look after yourself properly.
I wouldn't worry too much about flying after ET, I came home the day after mine and it was fine - the result is currently sitting in her high chair making a lot of mess!
If I can answer any other questions please just ask and I'll do my best to help.

with whatever you decide and keep us posted.
Love Gracie
xxxxx