Trailfinders has topped a Which? list of the country's best holiday companies thanks to its "first-class service".
The worldwide specialist achieved a score of 92% and was one of eight companies to be named a "recommended provider".
It was rated five stars for customer service during booking and the ease of booking categories, and four stars for accommodation, tours, journey and value for money. Trailfinders was also awarded four stars for having descriptions matching reality.
Walking holiday specialist Inntravel came second in the poll, with 89%, and Princess Cruises received a customer score of 88%, achieving five stars in the ease of booking and accommodation categories, putting the line in joint third place.
Also among the top ten were Exodus (88%), Archers Holidays (88%), Audley Travel (87%), Riviera Travel (87%), HF Holidays (87%), Fred Olsen Cruise (86%) and escorted tour and cruise company Voyages Jules Verne (85%).
Meanwhile, Thomas Cook received the lowest customer score rating of 60% - scoring two stars for journey and tours and three stars in all other categories.
Other companies that failed to get more than 70% included Olympic Holidays (62%), First Choice (65%), and Lowcostholidays.com (64%).
Which? asked members to complete an online survey about their holiday experiences, with 5,781 people respondents taking part.
Which? said: "With all top 10 holiday companies achieving a customer score of at least 85%, booking a trip with one of them seems like a sure-fire way to a great break.
"Better still, the highest-scoring companies cover a mix of holidays to suit most tastes, so you'll find beach destinations, city tours, activity adventures, cruises and much more."
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