Cheap flights from St. Louis to South America from $149
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 South America departing on 8/31. 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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LATAM Airlines flights from St. Louis to South America
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Delta flights from St. Louis to South America
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How to get the cheapest flight ticket from St. Louis to South America
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 cheapest month to fly to South America?
In general, September is the cheapest month to fly from St. Louis to South America. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $700. If you aren’t able to travel during the month of September, then book flights to South America from St. Louis during February instead. Flights to South America in February, while not as cheap as those in September, still average around $746.
What is the cheapest day to depart on your flight to South America?
The cheapest day to depart from St. Louis to South America is on a Wednesday when prices can be found for as low as $741. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to South America for around $967.
What is the cheapest time of day to depart on your flight to South America?
Our data shows that the cheapest St. Louis to South America flights are usually those with departure times in the morning. Our users have found flights to South America in the morning for as low as $785. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $831 on average. Flights to South America from St. Louis at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.
How far in advance should I book a flight to South America?
You are more likely to see cheaper flights to South America from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to South America for around $792 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South America from St. Louis for as low as $676 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to South America?
Spirit Airlines, LATAM Airlines, and Avianca are the most popular carriers operating from Lambert-St Louis to South America
What airlines fly to South America?
American Airlines, Delta and LATAM Airlines are the top three most popular airlines that fly to South America from St. Louis according to our data. American Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to South America. Keep in mind that there are 6 different airlines that fly to South America on a routine basis, so you have a few additional options to choose from.
Cheap St. Louis to South America flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to South America
When did momondo last update prices for flights from Lambert-St Louis Airport to South America?
Prices for flights from Lambert-St Louis Airport to South America were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to South America?
The number of operators available for flights from Lambert-St Louis Airport to South America is 6 as of July 2025.
How old do you have to be to fly from Lambert-St Louis Airport to South America?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to South America.
What documentation or ID do you need to fly to South America?
The travel and health documents you'll need for your trip to South America may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at South America. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Best airlines flying from St. Louis to South America
Compare and see reviews for airlines that fly from St. Louis to South America with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $289 | Free Cancellation | Rating 8.0 7,983 reviews | |||
| PriceFrom $336 | Free Cancellation | Rating 6.3 8,103 reviews | |||
| PriceFrom $399 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $403 | Free Cancellation | Rating 7.5 1,805 reviews | |||
| PriceFrom $474 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $758 | Free Cancellation | Rating 7.1 9,669 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to South America?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to South America. momondo saves you time and could save you money on your trip.
Can I find flights from St. Louis to South America with flexible booking policies on momondo?
momondo does allow users to show only those flights to South America 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 South America?
Once all potential St. Louis to South America flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from St. Louis to South America right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to South America from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.