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Cheap flights from St Louis (STL) to Ulaanbaatar (ULN)

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0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from St Louis (STL) to Ulaanbaatar (ULN)

How to find the cheapest flight from St Louis (STL) to Ulaanbaatar (ULN)
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How to find the cheapest flight from St Louis (STL) to Ulaanbaatar (ULN)
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How to find the cheapest flight from St Louis (STL) to Ulaanbaatar (ULN)
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Cheap flights from St Louis to Ulaanbaatar in August , September 2026

30 Aug - 30 Sep $ 1,517.00
STL
St Louis
Frontier Airlines
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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30 Aug - 30 Sep $ 1,573.00
STL
St Louis
WestJet
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
WestJet
3 STOPS
STL
St Louis
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24 Aug - 05 Sep $ 2,826.00
STL
St Louis
Alaska Airlines
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Alaska Airlines
2 STOPS
STL
St Louis
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Last minute flights from St Louis to Ulaanbaatar

28 Aug - 01 Sep $ 1,891.00
STL
St Louis
Frontier Airlines
3 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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29 Aug - 01 Sep $ 1,891.00
STL
St Louis
Frontier Airlines
3 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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29 Aug - 01 Sep $ 1,927.00
STL
St Louis
Frontier Airlines
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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One-way flights to Ulaanbaatar from St Louis

8:55 AM - 8:10 PM
MIAT Mongolian Airlines
2 Stops
26h 50m
STL - ULN
$ 762
Kiwi
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9:30 AM - 4:30 PM
United Airlines
2 Stops
22h 25m
STL - ULN
$ 1,058
Kiwi
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9:00 AM - 4:30 PM
United Airlines
2 Stops
22h 55m
STL - ULN
$ 1,058
Kiwi
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How to find the cheapest flight from St Louis (STL) to Ulaanbaatar (ULN)

Related info for your journey
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How to find the cheapest flight from St Louis (STL) to Ulaanbaatar (ULN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Ulaanbaatar (ULN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.