From former spouses to reunited brothers, BBC's Race Across the World has had a wide range of pairings over the years.
But what makes the perfect partner to travel the world with?
Scientists from Edith Cowan University have uncovered the personality traits that can make or break a trip.
While mother and son Caroline and Tom won this year's series, their results suggest your perfect travel partner probably isn't your mum.
Instead, the experts say that the ideal companion has four key attributes - emotional intelligence, travel experience, congruence, and conscientiousness.
If you're someone who is quite emotional, your ideal travel partner will be someone of the same sex with high emotional intelligence, according to the researchers.
But if you're more practical, an opposite-sex partner with excellent problem-solving skills is probably better suited.
'The best travel partner may depend on what each traveller values most,' explained Professor Sam Huang, who led the study.
While mother and son Caroline and Tom won this year's series of Race Across the World, the results suggest your perfect travel partner probably isn't your mum.
Since it first hit our screens back in 2019, Race Across the World has quickly become one of the BBC's most popular programmes.
In each series, pairs of competitors race across an area of the world using any means of transportation other than air travel - equipped only with the cost of a one-way plane ticket.
Series 1 was won by married couple Tony & Elaine Teasdale, Series 2 by Emon Choudhury and his nephew Jamiul Choudhury, and Series 3 by best friends Cathie Rowe & Tricia Sail.
Meanwhile, last year's Series 4 was won by best friends Alfie Watts & Owen Wood, and the most recent series, Series 5, by mother and son Caroline Bridge & Tom Bridge.
So, what made these pairs stand out against the competition?
In their new study, the team set out to understand what really makes for the perfect travel companion.
'Travel partner seeking has become a new and increasingly popular social phenomenon, especially among young travelers,' they explained in their study, published in the International Journal of Tourism Research.
'However, little is known about what partner attributes are preferred by this market and how such attributes impact memorable tourism experience.'
Since it first hit our screens back in 2019, Race Across the World has quickly become one of the BBC's most popular programmes.
Race Across the World: The winners
- Series 1: Married couple Tony and Elaine Teasdale
- Series 2: Emon Choudhury and his nephew Jamiul Choudhury
- Series 3: Best friends Cathie Rowe & Tricia Sail
- Series 4: Best friends Alfie Watts & Owen Wood
- Series 5: Mother and son Caroline Bridge & Tom Bridge
To get to the bottom of it, the team analysed 1,086 user posts on the Chinese social networking service Douban.
Their analysis revealed four key attributes of good travel partners.
These were: emotional intelligence, travel experience, congruence (agreement or harmony), and conscientiousness.
However, the balance of these qualities will depend on what you personally value the most.
'Those who place greater importance on emotional support and companionship are generally better matched with same-sex travel partners who possess high emotional intelligence and conscientiousness, traits that promote harmonious interactions and understanding,' Professor Huang explained.
However, if you prioritise practical benefits - things like skills and problem-solving abilities - an opposite-sex partner will be better for you.
In such cases, conscientiousness combined with extensive travel experience becomes key to successful cooperation and efficient resource sharing, according to the researchers.
Before you take this as a sign to cancel that upcoming trip with your wife, the team reassures that there are things you can do to make holidays more enjoyable for everyone.
'The advice is that if you are travelling with family, be sure to set some goals and expectations before packing your bags,' Professor Huang added.