$321 Find Cheap Flights from Peru to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 9/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
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Cheap Flights from Peru to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Peru to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Peru to St. Louis

Sun, Sep 21 - Thu, Sep 25
United Airlines Logo
12:40 am - 6:23 pmLIM-STL
41h 43m2 stops
United Airlines Logo
6:15 am - 11:00 pmSTL-LIM
16h 45m1 stop
$843United Airlines
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Mon, Sep 22 - Thu, Sep 25
American Airlines Logo
6:30 am - 11:59 pmLIM-STL
17h 29m1 stop
American Airlines Logo
5:28 am - 10:25 pmSTL-LIM
16h 57m1 stop
$849American Airlines
Find Deal
Mon, Sep 22 - Thu, Sep 25
American Airlines Logo
6:30 am - 10:22 pmLIM-STL
15h 52m2 stops
American Airlines Logo
8:50 am - 10:25 pmSTL-LIM
13h 35m2 stops
$854American Airlines
Find Deal
Sun, Sep 21 - Thu, Sep 25
United Airlines Logo
12:40 am - 6:58 pmLIM-STL
18h 18m1 stop
United Airlines Logo
6:15 am - 11:00 pmSTL-LIM
16h 45m1 stop
$876United Airlines
Find Deal
Sun, Sep 21 - Thu, Sep 25
Delta Logo
12:15 am - 2:35 pmLIM-STL
14h 20m2 stops
Delta Logo
6:42 pm - 6:25 amSTL-LIM
11h 43m2 stops
$990Delta
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Tue, Sep 30 - Sat, Dec 20
LATAM Airlines Logo
12:15 am - 7:05 pmLIM-STL
18h 50m2 stops
LATAM Airlines Logo
5:17 pm - 5:00 amSTL-LIM
10h 43m1 stop
$1,269LATAM Airlines
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Wed, Oct 1 - Sat, Dec 20
LATAM Airlines Logo
11:20 pm - 5:47 pmLIM-STL
18h 27m1 stop
LATAM Airlines Logo
5:17 pm - 10:10 pmSTL-LIM
51h 53m2 stops
$1,315LATAM Airlines
Find Deal
Tue, Sep 30 - Sat, Dec 20
LATAM Airlines Logo
12:15 am - 10:00 pmLIM-STL
21h 45m2 stops
LATAM Airlines Logo
5:17 pm - 10:10 pmSTL-LIM
51h 53m2 stops
$1,358LATAM Airlines
Find Deal
Wed, Oct 1 - Sat, Dec 20
 Logo
12:00 pm - 8:14 amLIM-STL
20h 14m1 stop
 Logo
9:53 am - 8:55 pmSTL-LIM
10h 02m1 stop
$1,406
Find Deal
Tue, Sep 30 - Sat, Dec 20
 Logo
12:05 am - 4:48 pmLIM-STL
16h 43m1 stop
 Logo
6:00 am - 8:55 pmSTL-LIM
13h 55m1 stop
$1,610
Find Deal
Booking Insights

KAYAK's insights & trends for flights to St. Louis

Get data-powered insights and trends for flights to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to St. Louis is September, where tickets cost $637 on average for return flights. On the other hand, the most expensive months are July and May, where the average cost of tickets from Peru is $913 and $898 respectively. For one-way flights, the best month to travel is September with an average price of $637.


Good to know

Low seasonMarch
Cheapest flight$321
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly with an average 11% increase in price.
Flight from Lima to St. Louis

FAQs - booking St. Louis flights

  • How far is Lambert-St Louis Airport from central St. Louis?

    The city center of St. Louis is 13 miles from Lambert-St Louis Airport.

  • What is the name of St. Louis’s airport?

    St. Louis is served by Lambert-St Louis Airport, also commonly referred to as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl. The airport code is STL.

  • What is the cheapest day to fly to St. Louis?

    Based on KAYAK data, the cheapest day to fly to St. Louis is Tuesday where round-trip tickets can be as cheap as $624. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $908 on average.

  • How does KAYAK find such low prices on flights to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to St. Louis?

    The cheapest time of day to fly to St. Louis is generally at night, when round-trip flights cost $834 on average. The most expensive time of day to fly to St. Louis is generally in the morning, which is peak travel time and where the average cost of a ticket is $906.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 1,509 direct flights from within Peru to St. Louis. The most common day for departures is Sunday, with 17% of flights taking off on this day.

Top tips for finding cheap flights to St. Louis

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Reviews of the top airlines flying from Peru to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Peru to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 7980 reviews
7.9Entertainment
7.9Comfort
8.2Boarding
7.3Food
8.5Crew
Airline reviews

Check in process was terrible. Lady at counter didn’t know what she was doing

4.0 OkayAnonymous, Jul 2025ICN - SEA
Read more Delta reviews

Check in process was terrible. Lady at counter didn’t know what she was doing

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

The crew was amazing; Von, Vera and Guadalupe were very friendly and attentive throughout the entire flight. They were friendly and welcoming to everyone. A solid and dedicated team for sure!

Terrible. I was bumped off of my original flight and spent the next six days fighting to get back on it. I lost hours of my vacation trying to get this situation corrected.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Bought a ticket that included a bag and they still charged me to check it in, latam is the worst airline.

Because the flight was late, we lost the connection to Brazil. You, Delta delayed, and you Delta anticipated the door closing in 15 min from Miami to GRU. Why? It caused a lot of stress! I almost could not see my mother in law alive because of your delay.

My entertainment did not work. I was very tired from the botched connection, and the poor sleep

It’s a delta flight operated by LATAM. The whole ticket sale is a mess, delta changed my flight but didn’t update it in LATAM system, I couldn’t get my boarding pass, it took me hours to resolve this issue with delta. I had to change my travel plan. No apology from Delta even though it’s their fault.

Boarding was done by woman who insisted on strict standing in line policy; food was ok; entertainment minimal

entertainment was not good; the shoulder strap on Business class seat did not sit well across the body (more like across the neck); the food was not hot and the special meal promoted by insert in the menu was not available to us

The boarding and new bag drop-off process was confusing and causing massive delays.

Wider seats, better seat cushions, (I felt like there was a board I was sitting on). I had the chicken to eat but It neither tasted nor looked like chicken. The fruit was good.

I was in the last row and they sent me to check in my luggage last minute after boarding. I had to go through the crowd.

Our flight was cancelled and it took them 5 hours to reschedule and the next morning they said we still didn’t have a new ticket.

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis

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