World Capitals Closest to... dang, I forgot where

So little problem here... can you get the world capital I forgot, along with its 20 closest capital cities? I already have the closest capitals down.
Credits: Jerry928 for the idea
Quiz by Quizzer6794
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Last updated: June 29, 2015
First submittedJune 28, 2015
Times taken170
Average score85.7%
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CAPITAL CITY:
 
 
 
km
Capital Cities
mi
1498
Dublin
931
1753
Oslo
1098
1895
London
1178
2023
Amsterdam
1257
2114
Copenhagen
1313
2134
Brussels
1326
2142
Stockholm
1331
2238
Paris
1391
2320
Luxembourg
1441
2394
Berlin
1488
REYKJAVIK
 
 
 
km
Capital Cities
mi
2425
Helsinki
1507
2458
Tallinn
1528
2585
Riga
1606
2619
Bern
1628
2644
Prague
1643
2778
Warsaw
1726
2802
Vilnius
1741
2895
Madrid
1799
2895
Vienna
1799
2926
Monaco
1818
+1
Level 43
Jun 29, 2015
First answer I got correct was REYKJAVIK LOL. Where in the world is LONDON on this list?
+2
Level 54
Jun 30, 2015
I get Andorra la Vella and Vaduz making the list
+1
Level 64
Jun 30, 2015
Very close, but no!
+1
Level 70
Apr 23, 2022
Come on, Vaduz is about 240km closer than Monaco!

And Andorra la Vella is about 100km closer than Monaco.

They're both closer than Vienna and Madrid as well, and would come in at #16 and #19 on the list.

If you think they're further, what do you think the distances are?