Highway 9, also called the Saskota Flyway, is a north–south, undivided provincial highway in Saskatchewan, Canada. It runs from North Dakota Highway 8 at the US border near Port of Northgate until it transitions into Provincial Road 283 at the Manitoba provincial boundary. Highway 9 is about 606 kilometres (377 mi) long and passes through the city of Yorkton and the towns of Alameda, Carlyle, Whitewood, Canora, Sturgis, Preeceville, and Hudson Bay. Major highways it intersects include Highway 1 (Trans-Canada highway), Highway 16 (Yellowhead Highway), and Highway 5. While most of it is a paved, two-lane highway, it is a gravel surfaced road from a few kilometres north of the town of Hudson Bay to its northern terminus at the Manitoba border. For short stretches through some of the larger communities, the highway is four lanes. The final 37 kilometres (23 mi) of Highway 9 runs concurrently with Highway 55 as part of the Northern Woods and Water Route.

Highway 9 passes by many notable lakes, traverses plateaus, and crosses major rivers such as the Souris, Qu'Appelle, and the Assiniboine. Along its route, there is also access to several parks and recreational areas.

The 1881 Dominion Land Survey divided southern Saskatchewan (as well as much of Western Canada) into six-mile by six-mile townships. Each township was further divided into 36 one-mile by one-mile sections. Sixty-six foot wide road allowances were created every mile running north and south and every two miles running east and west along the section lines. Highway 9, like other early provincial highways, followed these road allowances.

In 1922 a severe flood covered about 50% of the land between Yorkton and Canora taking out road and railway grades, including long sections of Provincial Highway 9.

In 1926 Preeceville was the northern terminus of Provincial Highway 9.

The route for the southern part of Provincial Highway 9 near Carlyle was surveyed in 1929. In 1930–31, it was graded and part of it was gravelled. Further gravelling was done in 1933. Further upgrades were needed, so in "about 1952, rural municipal councils realized they had to improve their road system to accommodate heavier loads and faster traffic.... road standards were set by the Government. Finally it was agreed the Government would pay sixty per cent and the municipality the remainder". The highway was then upgraded and oiled in 1956 north of Carlyle to Kenosee and Carlyle Lakes. In 1965–54 it was oiled south of town. Finally, in 1969–70, it was built up for heavier loads and paved.

Highway 9 begins at the Canada–United States border crossing in the south-eastern part of Saskatchewan and heads north to the east-central part of Saskatchewan ending at the border with Manitoba. Along the way, it crosses both the Trans-Canada Highway and Yellowhead Highway. Once in Manitoba, the highway continues to The Pas as Provincial Road 283. Along the route, Highway 9 traverses landscapes that transition from prairie grasslands in the south to boreal forest in the north. It passes through several towns, crosses multiple rivers, climbs plateaus, and provides access to several parks and recreational areas.

The southern terminus of Highway 9 begins at the Northgate Border Crossing and heads north. It continues south into the U.S. state of North Dakota as Highway 8. Adjacent to, and east of, the border crossing are the border communities of Northgate, Saskatchewan and Northgate, North Dakota. The original routing of Highway 9 went through the Canadian Northgate to the border station that was between the two Northgates. The two highways were rerouted about 0.5 miles (0.80 km) to the west of the Northgates in 1962. Continuing north from the border crossing, Highway 9 passes by Ceres Northgate Inland Terminal and crosses the Des Lacs River. From that river crossing, the highway bends to the north-west and intersects Highway 603 at its southern terminus (this section of the 603 is known as the Elcott Road as the former community of Elcott sat at this intersection). About 1.6 kilometres (1 mi) from the Elcott Road, Highway 9 turns north-east and descends into the Souris River Valley before crossing the Souris River and climbing up the other side. Once out of the valley, Highway 9 heads north for 16 kilometres (9.9 mi) before intersecting the east–west Highway 18. After a short 1.6 kilometres (1 mi) eastward concurrency with 18, 9 resumes it northerly travels. 3.2 kilometres (2.0 mi) from leaving the concurrency with 18, 9 intersects Township Road 40 at the south-east corner of Alameda. Eastbound on Township 40 crosses the Grant Devine Dam and provides access to Moose Creek Regional Park while west bound accesses Alameda. Continuing north from Alameda, Highway 9 heads to Carlyle. Along this stretch of highway, 9 intersects the eastern terminus of Highway 700, has a 3.2-kilometre (2 mi) long concurrency with the east–west Highway 361, and crosses Moose Mountain Creek.