Cheap flights from St. Louis to Seoul from $447
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Seoul departing on 8/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from St. Louis to Seoul
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between St. Louis and Seoul?
What is the cheapest month to fly to Seoul?
The month of December is another great option to travel to Seoul, with average flight prices from St. Louis averaging around $1,045.
What is the cheapest day to depart on your flight to Seoul?
According to our data, Tuesday is the cheapest day to fly to Seoul from St. Louis. The lowest ticket price found for a Tuesday departure recently was $1,367. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Seoul is Sunday, with ticket prices averaging around $1,713.
What is the cheapest time of day to depart on your flight to Seoul?
Flying to Seoul from St. Louis in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,290 when looking at flights departing in the afternoon. In the evening is when there is more demand to fly to Seoul, so prices are often more expensive at around $1,673 per ticket.
How far in advance should I book a flight to Seoul?
You are more likely to see cheaper flights to Seoul from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Seoul for around $1,289 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seoul from St. Louis for as low as $1,068 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Seoul?
Delta, Japan Airlines, and American Airlines are the most popular carriers operating from Lambert-St Louis to Seoul
What airlines fly to Seoul?
Air Canada, Delta and American Airlines are the top three most popular airlines that fly to Seoul from St. Louis according to our data. Air Canada is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Seoul. Keep in mind that there are 5 different airlines that fly to Seoul on a routine basis, so you have a few additional options to choose from.
When to book flights from St. Louis to Seoul
Cheap St. Louis to Seoul (STL to SEL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Seoul
How far is Lambert-St Louis to Seoul by plane?
The distance between Lambert-St Louis and Seoul is about 6661.9 mi. 17h 35m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Seoul?
Prices for flights from Lambert-St Louis Airport to Seoul are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Seoul?
As of July 2025, there are 5 operators available to choose from for flights from Lambert-St Louis Airport to Seoul.
How old do you have to be to fly from Lambert-St Louis Airport to Seoul?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Seoul.
What documentation or ID do you need to fly to Seoul?
The required travel and health documents for your Seoul trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seoul. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from St. Louis to Seoul?
Based on momondo bookings for flights between St. Louis and Seoul, the leading airline is Air Canada, making up 40% of the total bookings. Other popular airlines include Delta with 27%, United Airlines with 18%, and American Airlines with 15%.
Best airlines flying from St. Louis to Seoul
Compare and see reviews for airlines that fly from St. Louis to Seoul with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $799 | Free Cancellation | Rating 7.1 9,660 reviews | |||
| PriceFrom $902 | Free Cancellation | Rating 8.0 7,974 reviews | |||
| PriceFrom $902 | Free Cancellation | Rating 7.4 8,858 reviews | |||
| PriceFrom $996 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $1,080 | Free Cancellation | Rating 8.4 1,101 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Seoul?
Finding the right flight to Seoul from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seoul quick and easy, saving you time and money.
Can I find flights from St. Louis to Seoul with flexible booking policies on momondo?
momondo does allow users to show only those flights to Seoul from St. Louis which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from St. Louis to Seoul?
momondo provides multiple filters to help you find the best flight to Seoul from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from St. Louis to Seoul right now. Can momondo alert me if prices change?
Price alerts on flights to Seoul from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.