If you are flying from Manchester, New Hampshire to London, Ontario - then you are flying internationally because New Hampshire is in the USA and Ontario is in Canada. Now if you meant London, England to Manchester, New Hampshire - well than that too is an international flight as England is part of the UK and not the USA. However, if you mean Manchester, England to London, Ontario - it is still an international flight. Canada is a commonwealth country and shares a queen with England - but it's no longer the same country. If for some odd reason, you meant Manchester, England to London, England - well they are both in England so unless you have a layover in Dublin or Paris, it would be a domestic flight.
4 hours
A typical flight between Dallas, TX and New Hampshire would have a flying time of about 3 hours, 6 minutes.
On average, a flight from England to Toronto is 8 hours.
A flight from England to Andes would take about 7 hours.
How long this flight is all depends on where you are starting in England. A flight from London, England to Islamabad, Pakistan takes an average of 12 hours.
4 hours 9 minutes
Roughly 4 and a half hours.
On average, a flight from England to New York is 7 hours.
On average, a flight from England to Washington DC is 8 hours.
barboados to England
There are several cities in the world called Manchester. The flight times to the Philippines are very different, depending on whether you are flying from Manchester, England or Manchester, New Hampshire, USA, for example.