To tell the truth, Tottenham are also under the risk of being eliminated in the semi finals. 
The biggest mistake would be to underestimate Bodø/Glimt right now. They literally just eliminated Lazio and I can say they completely deserved it as well. They dominated the match home and resisted well in Italy later on. I don't think there is a big difference between Tottenham and Lazio. Don't look at bookies. They are manipulating the odds but they can't change the truth.
Why not have a finale like:
Athletic Bilbao v Bodø/Glimt ??
The biggest mistake would be to underestimate Bodø/Glimt right now. They literally just eliminated Lazio and I can say they completely deserved it as well. They dominated the match home and resisted well in Italy later on. I don't think there is a big difference between Tottenham and Lazio. Don't look at bookies. They are manipulating the odds but they can't change the truth.
Why not have a finale like:
Athletic Bilbao v Bodø/Glimt ??
The final between Athletic Bilbao vs Bodø/Glimt could happen, in football there are always unexpected surprises. Moreover, Bodø/Glimt's performance this season is different, from the last 5 matches they have played they have a positive trend, with an undefeated record. Bodø/Glimt also has a fairly dynamic and attractive playing style scheme. Of course this is a good capital to face Tottenham plus they have their own philosophy in the way they fight by implementing differences in each round, in other words they are ready to roll out the depth of the Squad material, both players and formations.
Likewise with Bibao in their squad they are the same as Man United, even Bilbao is better than Man United this season especially when viewed from their performance in the domestic league. So this will be a very tight match. So the possibility of a final as you expect could happen, but I myself predict that the Europa League final match will be between Man United vs Bodø/Glimt because it must be admitted that Man United's performance in the European league with the domestic league is very different, they are very good when in Europe.