$399 Find Cheap Flights from St. Louis to Peru

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Peru departing on 11/15. 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

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Cheap Flights from St. Louis to Peru

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lima
Lima1 stop$604
Cusco
Cusco2 stops$1,055
Arequipa
Arequipa2 stops$872
Lima
Lima1 stop$604
Cusco
Cusco2 stops$1,055
Arequipa
Arequipa2 stops$872

Book Cheap St. Louis to Peru Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Peru 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 St. Louis to Peru

Tue, Dec 2 - Fri, Dec 12
Spirit Airlines Logo
12:20 pm - 10:58 pmSTL-LIM
9h 38m1 stop
Spirit Airlines Logo
11:59 pm - 1:53 pmLIM-STL
14h 54m1 stop
$604Spirit Airlines
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Thu, Oct 30 - Thu, Nov 6
Multiple Airlines Logo
10:57 am - 1:20 amSTL-LIM
14h 23m2 stops
Multiple Airlines Logo
1:05 pm - 6:00 pmLIM-STL
29h 55m1 stop
$618Multiple Airlines
Find Deal
Mon, Mar 2 - Mon, Mar 9
LATAM Airlines Logo
10:00 am - 8:55 pmSTL-LIM
9h 55m1 stop
LATAM Airlines Logo
12:15 pm - 11:40 pmLIM-STL
11h 25m1 stop
$631LATAM Airlines
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Thu, Oct 30 - Wed, Nov 5
American Airlines Logo
10:10 am - 11:25 pmSTL-LIM
13h 15m2 stops
American Airlines Logo
12:45 am - 2:36 pmLIM-STL
14h 51m2 stops
$638American Airlines
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Mon, Mar 2 - Sun, Mar 8
Delta Logo
6:00 am - 8:15 pmSTL-LIM
13h 15m2 stops
Delta Logo
12:05 am - 6:04 pmLIM-STL
17h 59m2 stops
$644Delta
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Thu, Oct 30 - Thu, Nov 6
Delta Logo
11:21 am - 9:20 pmSTL-LIM
9h 59m1 stop
Delta Logo
11:40 pm - 2:43 pmLIM-STL
16h 03m1 stop
$645Delta
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Thu, Jan 1 - Fri, Jan 30
LATAM Airlines Logo
6:00 am - 9:35 pmSTL-LIM
14h 35m2 stops
LATAM Airlines Logo
12:15 pm - 11:40 pmLIM-STL
12h 25m1 stop
$664LATAM Airlines
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Sun, Nov 23 - Thu, Dec 4
United Airlines Logo
6:43 pm - 11:55 pmSTL-LIM
28h 12m2 stops
United Airlines Logo
1:50 am - 4:04 pmLIM-STL
15h 14m1 stop
$669United Airlines
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Sun, Nov 23 - Thu, Dec 4
United Airlines Logo
4:35 pm - 11:55 pmSTL-LIM
30h 20m1 stop
United Airlines Logo
1:50 am - 4:04 pmLIM-STL
15h 14m1 stop
$673United Airlines
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Tue, Dec 16 - Mon, Mar 16
American Airlines Logo
6:00 am - 9:30 pmSTL-LIM
14h 30m2 stops
American Airlines Logo
1:20 am - 3:42 pmLIM-STL
14h 22m1 stop
$724American Airlines
Find Deal
Booking Insights

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Peru, 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 from St. Louis to Peru is February, when tickets cost $665 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of round-trip tickets is $856 and $854 respectively.

What’s the cheapest day of the week to fly from St. Louis to Peru?

The average price of all round-trip flights from St. Louis to Peru clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Peru on a Wednesday and more expensive on a Friday. On your return trip to St. Louis, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

How far in advance should I book a flight from St. Louis to Peru?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Peru, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Peru, you should book around 4 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$399
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from St. Louis to Cusco

FAQs - booking Peru flights

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

    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 from St. Louis to Peru.

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

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

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

    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 from St. Louis to Peru 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 from St. Louis to Peru?

    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 from St. Louis to Peru 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 Peru?

    The cheapest time of day to fly to Peru is generally in the morning, when round-trip flights cost $785 on average. Morning departures are around 2% cheaper than evening flights, on average. The most expensive time of day to fly to Peru is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $831.

Reviews of the top 3 airlines serving from St. Louis to Peru

 
Need help choosing which airline to fly with from St. Louis to Peru? 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.
7.9
DeltaOverall score based on 7954 reviews
8.2Boarding
8.5Crew
7.9Entertainment
7.3Food
7.9Comfort
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Nothing special. The crew never went out of their way for anything.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

I’m entitled to a refund per LATAM due to the mid flight itinerary change and being stuck in São Paulo for 24 hours and needing to get a hotel. The airline was dismissive and of no help.

The flight was late. Please do not delay next time.

I couldn't travel, now I can't get a refund and to change the date I have to pay an absurd fine.

Boarding was confusing with a delayed flight because there was no English translation

My biggest complaint is the comfort. I am not tall and there was no legroom. It was very uncomfortable. During my transfer in Sao Paola, the flight was slightly delayed so boarding was confusing because there were no instructions in English.

Horrible the worst airlines I have ever flown. Cancelled flight with no choices and when contacted them they were not helpful

I never got this flight. You sent me to Chile!!! And from Chile I got the other flight to São Paulo... I've arrived 7h latter than I was supposed to arrive because of Delta delays.

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.

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

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.

Given it’s a red-eye into Charolotte, we didn’t get any food. The survey does not include “N/A” so the rating will be skewed.

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

American airlines suck they delay the flights all the time made me sleep in an airport because my flight was delayed and I miss my connecting flight

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

Having to reschedule flights a day later, they loaded by luggage on the wrong plane from Little rock now I have to HOPE they deliver it to where im staying like they said would. International flight crew was very disgruntled and not very friendly.

We will be writing a long, detailed letter to corporate about our awful experience with American airlines.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

The entertainment package was vast and the selections were very current. Keep updating it was great.

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

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