We checked one Christmas flight, ATL to London Heathrow, Dec 25 to Jan 3, 1 stop in Montreal, on three sites: Skyscanner about $1,430, Google Flights $1,351, Gotoesy $833. Compare many booking sites in one search. Fares change often.
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How we checked
We searched the same route and dates on Google Flights, Skyscanner and Gotoesy on the same day and compared the price each site showed, matching the same airline and flight times wherever we could. When a site did not list the exact flight, we say so and show its closest fare instead.
Gotoesy compares many booking sites in one search, so it often finds the same seats for less. Fares change often, so the price you see today may be different. Checked bags may cost extra.
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