Their sighs of relief might drown out the sound of the engines as they fly south to Buenos Aires today, but Scotland will leave North America with an unbeaten record after adding this scrappy and workmanlike win to victory over the USA last weekend.
Canadians are a famously hospitable people, but Scotland defence coach Matt Taylor has warned his players to expect a not-so-warm welcome when they take on the home side at Toronto's BMO Stadium tonight.
Greig Laidlaw believes his side are in line for a 15 to 20-point winning margin against Canada in Toronto today, so long as they can hammer home the advantages that have created a gap of eight places between the two sides in the world rankings.
The frustrations built up during his 10 months on the sidelines will finally be laid to rest by Peter Horne when the Glasgow Warriors centre makes his first start for Scotland against Canada in Toronto on Saturday, one of four changes to the side which beat the US Eagles 24-6 in Houston last weekend.
New Zealand have booked a place in the top four for Sunday's semi-final round of the IRB Junior World Championship in Auckland, after achieving the necessary bonus-point victory with a comfortable win in the final pool match at the ECOLight Stadium.
Scotland's preparations for Saturday's meeting with Canada in Toronto suffered a double blow yesterday when it was confirmed that the Saracens duo Jim Hamilton and Duncan Taylor have been ruled out of the game with ankle and calf injuries respectively.
All week, Vern Cotter had worn a look of grave intensity but, as the new Scotland coach reflected on this comfortable win on Saturday evening, an expression far closer to contentment settled on his features.
Stuart Hogg may have been in the doghouse for the past three months, but he emerged from it with his tail wagging wildly on Saturday evening when he delivered the sort of trademark solo try that marks him out as a very special talent indeed.
Greig Laidlaw, the Scotland captain, has warned his compatriots that they need to worry about the opposition rather than the weather as they head into tonight's match with the United States in hot and humid Houston.
Vern Cotter has a reputation for plain-speaking, but he is doing his level best to destroy it as he sits in a windowless room deep in the bowels of the BBVA Stadium in Houston on the eve of Scotland's encounter with the United States.
Having named three new caps in the starting line-up for Saturday's match with the USA Eagles in Houston, Scotland coach Vern Cotter yesterday warned that a baptism of fire lies in store for them against a side who have made huge strides since the Scots last played them 11 years ago.
Duncan Hodge, the Scotland assistant coach, is confident his players will cope with the heat and humidity of Houston when they open their summer Test series by taking on the USA Eagles in the Texas city on Saturday.