It is unlikely teams departed directly from Ålesund to Milan. There are no direct flights from Ålesund to Heathrow on 20 Jun, so teams would have been on this itinerary:
SA1321 SK1321 from Ålesund to Oslo, 1425-1520
SA811 SK811 from Oslo to London Heathrow, 1715-1830, actual arrival 1906
Sightings at London Heathrow from 1940 onwards
BA582 from London Heathrow to Milan, 2035-2330
However, better options exist from Ålesund to Milan (unless they were full):
Via Frankfurt
SA1321 SK1321 from Ålesund to Oslo, 1425-1520
LH863 from Oslo to Frankfurt, 1705-1910
LH258 from Frankfurt to Milan, 2150-2300
Via London Gatwick
D82829 from Ålesund to London Gatwick, 1550-1710
U25299 from London Gatwick to Milan, 2005-2300
Bergen isn't likely either. A Bergen-Heathrow itinerary would also involve them going via Oslo. The latest flight is DY625 from Bergen to Oslo, 1500-1555. However, there are these better options:
Via Amsterdam (leaves 55min before the Oslo flight)
KL1188 from Bergen to Amsterdam, 1405-1550
VY8436 from Amsterdam to Milan, 1825-2005
Via Copenhagen and Munich (shorter connection times)
SA2873 SK2873 from Bergen to Copenhagen, 1600-1720
LH2445 from Copenhagen to Munich, 1900-2035
LH1864 from Munich to Milan, 2145-2050
Teams most likely set off for Milan from Oslo. But a bus from Ålesund to Oslo would take 11 hours, giving them little space between Ålesund on 19 Jun and the departure from Oslo on the afternoon of 20 Jun. Was Ålesund a KOR leg followed by a long bus ride to Oslo, or did teams fly into Oslo for a task or two before leaving?
Edit: Oops, thanks Claude!