I just attach the screenshot below:
According to WoAinfo, XPs required for the same level at different airport should be exactly the same.
I can recall it was very difficult to progress after LV81 at BKK, so it might be changed recently.
Can anyone confirm this or have any idea on it?
PS: I would say if the XP for each level will dramatically increase after Lv100 for all airports (the same growth before Lv100 and then it just +5000 from XPs required for Lv99 > Lv100, so to be 7000 XPs or something…), could be better for OCDs like me… 
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Yeah. At some big airports like IAD, BKK, and LHR the xp per level after level 80 jumps to around 5000, almost 6000 for level 89 at IAD. It’s miserable lol. For some reason that doesn’t happen at SYD.
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I wouldn’t mind grinding it if I got an interesting contract but it’s a couple of CRJ’s at LHR. Would love another 20 levels at LHR after unlocking SYD which are just cool retro liveries for BA 
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Yeah, I already knew it will be very hard after Lv81. But my point is that things seems to be different at BKK and it has been changed, probably recently.
The XP needed to Lv83 should be 5,272 but 1,318 at BKK (like LHR), and only BKK.
I have no idea what’s happening…
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