Cheap Flights from St. Louis (STL) to Ulaanbaatar (ULN)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Ulaanbaatar (ULN-Buyant-Ukhaa Intl.)

Alternative airports near Ulaanbaatar

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ulaanbaatar (UBN-Chinggis Khaan Intl.) UBN. Cheapest option available. Average driving time to city center is 38 minutes. Flights from $1,232
UBN
Ulaanbaatar (UBN-Chinggis Khaan Intl.)
Cheapest
Average driving time to city center38 min
Flights from $1,232

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN) cost?
Grab a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN)?
The cheapest month to fly from STL to ULN is , when demand is low. Off-peak season is usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN)?
To find the cheapest airline flying from STL to ULN, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to ULN?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on various factors, including the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN)?
Opt for a flight from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN) last-minute?
Last-minute fares from STL to ULN are generally more expensive. To lock in the lowest rates, start searching for flights well in advance. That said, if you're flexible with your travel plans, you may score a cheap fare just before your departure.
Is it cheaper to book a STL to ULN flight and hotel package?
You'll typically save money by securing a STL to ULN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've chosen your ideal accommodations and flights, consider adding extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Chinggis Khaan Intl. Airport (ULN)?
In most cases, you're able to reschedule or cancel your STL to ULN flight. However, there may be additional charges, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want further details, head to our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Buyant-Ukhaa Intl.
Distance
6361 mi

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St. Louis to Ulaanbaatar Flights

The cheapest times to fly from St. Louis to Ulaanbaatar

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Ulaanbaatar are during the month of . You can find some of the cheapest flights from St. Louis to Ulaanbaatar with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Ulaanbaatar

Sunday is one of the best days to book for cheap flights from St. Louis to Ulaanbaatar: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Ulaanbaatar

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Ulaanbaatar in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Ulaanbaatar flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Ulaanbaatar airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Ulaanbaatar Flights

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*Available to One Key members.