You’re coming from Germany? (Wilkommen!
)
Okay. Saskatoon is a LONG way from Toronto, Seattle, or Chicago. Actually, Saskatoon is a long way from anywhere. 
Thing one about the Prairies: it’s flat and open. Really, really flat and really, really open. It can be disturbing if you’re not used to it: when I visited (road trip to Edmonton), I felt like a fly on a pie-plate at times, as if I could feel the earth curving down to the horizon. And driving was stranger; at times I g=felt like my eyes were gettign sucked out through the windshield.
My mother was born in Saskatchewan and loved it; she often spoke of the beauty of the skies. When she went to Vancouver through the western mountains, she said they just ‘got in the way of the scenery’. 
Thing two about the Prairies: it’s an inland mid-continental climate with few moderating bodies of water west of Winnipeg, and pretty much nothing between you and the Arctic but grassland and the occasional tree. Translation: it gets bloody cold in the winter. Mom talked about walking to school when she was a kid, along the wooden sidewalks of Regina in -40 temperatures. What with global warming and all, it’s probably warmer now, but it’s still colder than Toronto. Be prepared.
Will you be moving a lot of personal belongings with you? Electronics, etc? <insert usual caution about different AC mains volatage and electrical plugs, TV standards, radio frequencies, etc>
Planes…
I would not recommend passing through the States unless you specifically want to visit the States; otherwise, it just adds another layer of hassle. There is no such thing as an ‘airside’ transfer in the US; all passengers touching US soil must pass though Customes and Immigration, even if they are getting on another plane and going on to a third country. This has buggered up the flight of more than one person.
It might be a good idea to get to Toronto, then take a connecting flight from here. Toronto has the largest airport in Canada, and you can basically get flights to anywhere out of Toronto. Also, travel to Toronto is easy from Europe, London especially.
Several Dopers have mentioned that Zoom Airlines is the cheapest way to get across the Atlantic to Canada; it goes from London and other parts of the UK, and Paris, to Toronto and Montréal and other destinations in Canada. Zoom has flights from London to Toronto in June for UKP 170 (plus taxes and fees in the UK, I assume).
(The UK pound is about $2 Canadian; the euro is about $1.40 Canadian. I distinctly remember both of them as being more, but that was five years ago. Hmm.)
I leave the exercise of getting to London from Germany as an exercise for the reader. 
There are, of course, direct flights from München to Toronto on other airlines at greater price.
Once in Montréal or Toronto, you can get a domestic flight on WestJet, Air Canada, or that other airline I don’t remember.
I would investigate taking a flight to (in preferred order of nearness) Regina SK, Winnipeg MB, Calgary AB, or Toronto ON, then taking a bus. I suspect at least one of these destinations would be cheaper than flying directly to Saskatoon. You will almost certainly have to change planes somewhere to do this.
I find a one-way air cost of about $400 (ticket price plus taxes and other charges, of which there are about half a dozen on air tickets) on Westjet for Toronto to Saskatoon or Regina; $300 for Toronto to Winnipeg; $375 for Toronto to Calgary. (Hmm. Not as bad as I thought.) Air Canada and Westjet are about the same in price.
On the other hand, Zoom has a direct flight in June, London to Winnipeg, for L200!
Bus…
Most buses in central Canada are run by Greyound, which has gobbled up other companies, and then reduced service. Bus trips run almost nonstop, with breaks every four or five hours for meals and rest stops. Very few people travel on bus journeys longer than a day or so.
It’s about a two-day non-stop bus journey to Regina from Toronto. I would not recommend this unless it was dramatically cheaper; I once did the bus trip from Toronto to Sault Ste. Marie, about a third of the way, and it took 11 hours and was rather brutal. The bus station food in Sudbury was …not terribly great.
Greyhound bus fare Winnipeg to Saskatoon is $98 plus tax one way. Greyhound quotes a bus fare of almost three hundred dollars (plus tax) Toronto to Saskatoon. Might as well fly. 
Trains…
There is not a lot of train service outside the Windsor-to-Quebec City corridor of central Canada. Passenger trains are run by VIA. The train trip from Toronto to the west would take about three days and would probably be quite expensive, as the famous transcontinental train (there is only one route) is now geared more towards tourists as a ‘rail cruise’, rather than a way to get somewhere. VIA gives a fare from Toronto to Saskatoon of almost $500… but at least you can get there on the train.
The route shown is the only surviving transcontinental train route; it goes through the bushland of northern Ontario. There used to be another route that went through Sault Ste. Marie and Thunder Bay and along the north shore of lake Superior, which is stunningly-beautiful country, but it was axed in a costcutting move.
If you pass through Toronto, we’ll have a DopeFest in your honour. Likewise Spoons and the others in Calgary, I’m sure.