We have calculated how far we flew during our seven month trip…
Heathrow > Madrid > Lima: 10,760 km
Santiago > Auckland: 9,640 km
Auckland > Sydney > Ayers Rock: 4,320 km
Ayers Rock > Cairns: 1,790 km
Sydney > Melbourne > Bali: 5,085 km
Bali > Singapore > Bangkok: 3,110 km
Bangkok > Siem Reap: 351 km
Hanoi > Bangkok > Chiang Mai: 1,537 km
Chiang Mai > Bangkok: 568 km
Bangkok > Heathrow: 9,540 km
En route to Lima
In total we flew 46,701 km (29,019 miles). Considering that the equatorial circumference of the Earth is just over 40,000km, I think we did quite a direct route!