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

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1 Adults (11+)
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 May , June 2026

31 May - 16 Jun $ 1,890.00
STL
St Louis
Frontier Airlines
3 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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31 May - 16 Jun $ 1,928.00
STL
St Louis
Frontier Airlines
3 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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31 May - 16 Jun $ 2,001.00
STL
St Louis
Frontier Airlines
3 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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Last minute flights from St Louis to Ulaanbaatar

25 May - 01 Jun $ 2,135.00
STL
St Louis
Alaska Airlines
3 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Alaska Airlines
3 STOPS
STL
St Louis
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25 May - 01 Jun $ 2,157.00
STL
St Louis
Alaska Airlines
3 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Alaska Airlines
3 STOPS
STL
St Louis
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25 May - 01 Jun $ 2,230.00
STL
St Louis
WestJet
3 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
WestJet
3 STOPS
STL
St Louis
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One-way flights to Ulaanbaatar from St Louis

7:41 PM - 12:05 AM
MIAT Mongolian Airlines
3 Stops
42h 4m
STL - ULN
$ 1,076
Kiwi
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6:21 AM - 10:00 AM
Jeju Air
3 Stops
41h 19m
STL - ULN
$ 1,081
Kiwi
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6:21 AM - 1:50 AM
MIAT Mongolian Airlines
3 Stops
33h 9m
STL - ULN
$ 1,119
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.