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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 September , October 2026

28 Sep - 28 Oct $ 1,738.00
STL
St Louis
Frontier Airlines
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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29 Sep - 28 Oct $ 1,775.00
STL
St Louis
Frontier Airlines
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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28 Sep - 28 Oct $ 1,862.00
STL
St Louis
Alaska Airlines
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Alaska Airlines
3 STOPS
STL
St Louis
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Last minute flights from St Louis to Ulaanbaatar

28 Sep - 01 Oct $ 2,170.00
STL
St Louis
Frontier Airlines
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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28 Sep - 01 Oct $ 2,172.00
STL
St Louis
Frontier Airlines
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Frontier Airlines
3 STOPS
STL
St Louis
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28 Sep - 01 Oct $ 2,196.00
STL
St Louis
Alaska Airlines
2 STOPS
ULN
Ulaanbaatar
ULN
Ulaanbaatar
Alaska Airlines
3 STOPS
STL
St Louis
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One-way flights to Ulaanbaatar from St Louis

6:29 AM - 12:05 PM
Cathay Pacific
2 Stops
45h 16m
STL - ULN
$ 790
Kiwi
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9:04 AM - 4:30 PM
United Airlines
2 Stops
22h 51m
STL - ULN
$ 1,120
Kiwi
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9:04 AM - 4:30 PM
United Airlines
2 Stops
22h 51m
STL - ULN
$ 1,482
Kiwi
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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)
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.