Cheap flights from St. Louis to Santiago from $484
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 Santiago departing on 7/15. 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 Santiago
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 Santiago?
In general, October is the cheapest month to fly from St. Louis to Santiago. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $772. If you don’t want to visit Santiago in October, then you should wait until July to fly from St. Louis, when ticket prices are also cheap, with an average price of $898.
What is the cheapest day to depart on your flight to Santiago?
The cheapest day to depart on your flight to Santiago is on a Wednesday when prices can be found for as low as $955. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Santiago on Saturday is $1,189.
What is the cheapest time of day to depart on your flight to Santiago?
At noon is the cheapest time of day to fly from St. Louis to Santiago when you can find flight prices for as low as $982. Flying to Santiago at noon is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Santiago, so prices are often more expensive at around $1,074 per ticket.
How far in advance should I book a flight to Santiago?
You are more likely to see cheaper flights to Santiago from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Santiago for around $979 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Santiago from St. Louis for as low as $817 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Santiago Arturo Merino Benitez?
LATAM Airlines and Delta are the most popular carriers operating from Lambert-St Louis to Santiago Arturo Merino Benitez
What airlines fly to Santiago?
LATAM Airlines, Delta and American Airlines are the top three most popular airlines that fly to Santiago from St. Louis according to our data. LATAM Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Santiago. Keep in mind that there are 4 different airlines that fly to Santiago on a routine basis, so you have a few additional options to choose from.
When to book flights from St. Louis to Santiago
Cheap St. Louis to Santiago (STL to SCL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Santiago
How far is Lambert-St Louis to Santiago Arturo Merino Benitez by plane?
The distance between Lambert-St Louis and Santiago Arturo Merino Benitez is about 5131.6 mi. Typically, this will take 12h 42m by plane in normal conditions.
When did momondo last update prices for flights from Lambert-St Louis Airport to Santiago Arturo Merino Benitez Airport?
Prices for flights from Lambert-St Louis Airport to Santiago Arturo Merino Benitez Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Santiago Arturo Merino Benitez Airport?
As of July 2025, there are 4 operators available to choose from for flights from Lambert-St Louis Airport to Santiago Arturo Merino Benitez Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Santiago Arturo Merino Benitez Airport?
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 Santiago Arturo Merino Benitez Airport.
What documentation or ID do you need to fly to Santiago Arturo Merino Benitez Airport?
The required travel and health documents for your Santiago Arturo Merino Benitez Airport 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 Santiago Arturo Merino Benitez Airport. 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 Santiago?
Based on momondo bookings for flights between St. Louis and Santiago, the leading airline is LATAM Airlines, making up 43% of the total bookings. Other popular airlines include Delta with 30%, American Airlines with 18%, and United Airlines with 9%.
Best airlines flying from St. Louis to Santiago
Compare and see reviews for airlines that fly from St. Louis to Santiago with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $742 | Free Cancellation | Rating 8.0 7,983 reviews | |||
| PriceFrom $762 | Free Cancellation | Rating 7.5 1,805 reviews | |||
| PriceFrom $822 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $883 | Free Cancellation | Rating 7.4 8,861 reviews |
Traveling to a place near Santiago?
Book flights to Santiago if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from St. Louis to Santiago?
Finding the right flight to Santiago 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 Santiago quick and easy, saving you time and money.
Can I find flights from St. Louis to Santiago with flexible booking policies on momondo?
Flights from St. Louis to Santiago with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from St. Louis to Santiago?
momondo provides multiple filters to help you find the best flight to Santiago 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 Santiago right now. Can momondo alert me if prices change?
If you are not ready to book a flight from St. Louis to Santiago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Santiago and let you know when they change.