Trip.com
>
Flights
>
Flights to Mongolia
>
Flights to Ulaanbaatar
Hotels in Ulaanbaatar
>
Flights from St. Louis to Ulaanbaatar

Cheapest airlines flights from St. Louis to Ulaanbaatar

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.
Turkish Airlines logo Turkish Airlines
Airlines are determined based on actual purchased flight tickets from St. Louis to Ulaanbaatar according to previous 12 months data from Trip.com.

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

      • STL 12:28
        39h 32m
        2 stops
        UBN 17:00
        St. Louis - Ulaanbaatar | Fri, Jul 10 | Delta Air Lines
        UBN 00:25
        28h 5m
        2 stops
        STL 15:30
        Ulaanbaatar - St. Louis | Sat, Jul 18 | Asiana Airlines
        US$3,263 US$6,785
        52% off
        52% off
        US$6,785 US$3,263
      • STL 19:23
        32h 37m
        2 stops
        UBN 17:00
        St. Louis - Ulaanbaatar | Fri, Jul 10 | Asiana Airlines
        UBN 00:25
        28h 5m
        2 stops
        STL 15:30
        Ulaanbaatar - St. Louis | Sat, Jul 18 | Asiana Airlines
        US$3,264 US$6,785
        52% off
        52% off
        US$6,785 US$3,264
      • STL 06:37
        45h 8m
        2 stops
        UBN 16:45
        St. Louis - Ulaanbaatar | Fri, Jul 10 | Cathay Pacific
        UBN 13:00
        39h 46m
        2 stops
        STL 15:46
        Ulaanbaatar - St. Louis | Fri, Jul 17 | Korean Air
        US$4,262 US$6,785
        37% off
        37% off
        US$6,785 US$4,262
      • STL 17:13
        34h 32m
        2 stops
        UBN 16:45
        St. Louis - Ulaanbaatar | Fri, Jul 10 | American Airlines
        UBN 13:00
        39h 46m
        2 stops
        STL 15:46
        Ulaanbaatar - St. Louis | Fri, Jul 17 | Korean Air
        US$4,394
        35% off
        US$6,785 US$4,394
      • STL 07:08
        39h 2m
        2 stops
        UBN 11:10
        St. Louis - Ulaanbaatar | Fri, Jul 10 | Korean Air
        UBN 13:00
        39h 46m
        2 stops
        STL 15:46
        Ulaanbaatar - St. Louis | Fri, Jul 17 | Korean Air
        US$5,156
        24% off
        US$6,785 US$5,156
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        ULN 15:00
        6h
        Nonstop
        STL 16:00
        Ulaanbaatar - St. Louis | Thu, Jun 18 | Normal Airline
        Find more flights
        Find more flights
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        Search
        Search
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        Search
        Search
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        Search
        Search
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        Search
        Search
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        Search
        Search
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        Search
        Search
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        Search
        Search
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        Search
        Search
      • STL 13:00
        17h 25m
        1 stop
        ULN 14:00
        St. Louis - Ulaanbaatar | Tue, Jun 16 | Normal Airline
        Search
        Search

Displayed flight fares from St. Louis to Ulaanbaatar are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

St. Louis to Ulaanbaatar Flight Details

The distance between St. Louis and Ulaanbaatar is about 10,255.88 km. Based on Trip.com's latest data, travel demand is highest in October. The off-season for travel is December.

Cheapest return ticket priceUS$3,263
Cheapest monthDecember
Peak season for travelOctober
Flight distance10,255.88 km
Popular airlineTurkish Airlines
Flight statistics for the St. Louis–Ulaanbaatar route are based on aggregated booking data from Trip.com over the past 12 months.

Frequently Asked Questions

  • Which airlines offer flights from St. Louis to Ulaanbaatar?

    At the moment, several airlines serve connecting flights from St. Louis to Ulaanbaatar, including: Turkish Airlines Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from St. Louis to Ulaanbaatar is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from St. Louis to Ulaanbaatar, you can use various tools on Trip.com:
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Ulaanbaatar travel is around October.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from St. Louis to Ulaanbaatar is December, when demand for travel is lower.
  • You can land at any one of the following hubs in Ulaanbaatar, with St. Louis Lambert International Airport to Chinggis Khaan International Airport (STL-UBN) is by far the most common option on this route: Chinggis Khaan International Airport (UBN) Buyant Ukhaa International Airport (ULN).
  • The time difference between Ulaanbaatar and St. Louis is 14h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Trip.com Airline Insights on Flights from St. Louis to Ulaanbaatar

Which airline offers the cheapest direct flights from St. Louis to Ulaanbaatar?

Data is based on the average price of all nonstop flights from St. Louis to Ulaanbaatar on Trip.com over the past 12 months.

Based on Trip.com’s data from the past 12 months, Alaska Airlines provides the lowest-priced direct flights from St. Louis to Ulaanbaatar, with fares starting at US$941.

US$941
US$2,259
US$3,577
US$4,895
Alaska Airlines
US$941
Alaska Airlines
Turkish Airlines
US$1,059
Turkish Airlines
Hawaiian Airlines
US$4,895
Hawaiian Airlines

Explore More Popular Flights

Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.