Great Britain and Ireland is a common travel area and no passport is needed to travel between the two, only photographic ID (this is only required for check in and boarding)
The ID that is needed to fly to Dublin from Prestwick on a Ryanair flight is a passport.
It's 50 Mins on Lingus to Heathrow, around 65-70 mins to London City using Air France
That would depend on your nationality. As a general rule, for any international travel, bring a passport with you.
no direct flight. when traveling via dublin or heathrow, around 12 hours
flight time from heathrow to Singapore
A flight from Heathrow to Adelaide would take about 21 hours.
the flight time from Paris to heathrow is 50 min to one houre
The flight time from Oslo, Norway to London Heathrow Airport is about 1 hour, 27 minutes.
From London Heathrow to Cancun, Mexico flight time around 8 hours
The quickest flight is about 9.5 hours, flying from Montreal-New York-Dublin. There is no direct flight from Montreal to Dublin.
You can book a cheap flight to London Heathrow Airport by using the website skyscanner. Expedia and Travelocity may also have cheap flights to Heathrow Airport.
The average flight time from London Heathrow Airport to Toulouse, France is 1 hour, 6 minutes.