Originally Posted by dliesse

5. (1987) You need to fly from Burbank, CA to Montreal, Quebec next month. Your travel agent has booked you a three flight itinerary involving three airlines, each operating a different model of aircraft, each built by the same manufacturer. One of the airlines is foreign and operates a widebody on the final leg. Each aircraft will also have a different engine configuration. None of the aircraft were built north of the 45° parallel. Identify the routing, the three airlines and the three aircraft types.

Well, this pretty much limits it to McDonnell Douglas aircraft (Toulouse is south of 45° but the Airbus 320 series didn't go into service until 1988). So for the last leg we need to think of a foreign airline operating a DC-10 to Montreal. Then we need a couple other McDD operators for the first two legs. By 1987 I don't think there were a lot of options out of BUR, yet, so let's try this:

BUR-SEA, AS MD-82
SEA-YVR, UA DC-8-61
YVR-YUL, CP DC-10-30

I like it, and to be honest, that is not a routing I thought to investigate when researching this question. That said, I don't recall UA running stretch 8s on the SEA-YVR. Doesn't mean they didn't though. And then we'll have to hope each of those aircraft specific flights connected well with each other at each point.

Unfortunately, I have no way of checking just now, so we'll have to settle for inconclusive. I'll be home in five days, so please remind me to check.

In the meantime, one schedule I can definitely vouch for connectionwise involves the same combination of aircraft, including a United D8S for the second flight. Different routing though, and the first and third airlines are different.

Care to hazard a guess?