I cannot assist you, but just to mention that I took my first trip to North America in 1973, with a firm that I think was called 'Airfare'. It was Gatwick to Toronto by way of Prestwick. The Charter flight was operated by a B.Cal 707. It was the first (and last) time I had tasted Drambuie, and of course the hostesses were dressed in tartan.
If i remember correctly, at that time air charter firms were going bust quite regularly, with little or no compensation for passengers - we were seriously concerned whether 'Airfare' would do the same whilst we were abroad, but it was ok.
They say travel broadens the mind, we took a circular trip by Greyhound bus from Toronto via the deep South to the West Coast of the USA and back again via a northern route. It took 5/6 weeks and left an indelible impression on me as young 20year old student. It was wonderful. Sorry to take this a bit OT.