$227 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 4/29. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Peru

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

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$734
Cusco
Cusco2 stops$1,039
Arequipa
Arequipa2 stops$953
Lima
Lima1 stop$734
Cusco
Cusco2 stops$1,039
Arequipa
Arequipa2 stops$953

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

Wed, Sep 9 - Sat, Sep 19
LATAM Airlines Logo
1:30 pm - 5:00 am
STL
-
LIM
15h 30m
1 stop
LATAM Airlines Logo
12:05 pm - 8:06 am
LIM
-
STL
20h 01m
1 stop
$734LATAM Airlines
Thu, Apr 23 - Thu, Apr 30
Delta Logo
6:00 am - 9:35 pm
STL
-
LIM
15h 35m
2 stops
Delta Logo
8:55 am - 11:36 pm
LIM
-
STL
14h 41m
2 stops
$735Delta
Mon, Jun 22 - Wed, Jul 1
American Airlines Logo
6:00 am - 8:30 pm
STL
-
LIM
14h 30m
2 stops
American Airlines Logo
6:30 am - 9:37 pm
LIM
-
STL
15h 07m
2 stops
$740American Airlines
Sat, May 23 - Tue, Jun 9
Delta Logo
10:44 am - 5:00 am
STL
-
LIM
18h 16m
1 stop
Delta Logo
8:55 am - 11:38 pm
LIM
-
STL
14h 43m
2 stops
$765Delta
Sat, May 23 - Mon, Jun 8
LATAM Airlines Logo
6:00 am - 8:55 pm
STL
-
LIM
14h 55m
2 stops
LATAM Airlines Logo
12:15 am - 7:12 pm
LIM
-
STL
18h 57m
2 stops
$770LATAM Airlines
Wed, Sep 9 - Sat, Sep 19
American Airlines Logo
6:06 am - 10:15 pm
STL
-
LIM
16h 09m
2 stops
American Airlines Logo
10:00 pm - 12:18 pm
LIM
-
STL
14h 18m
2 stops
$774American Airlines
Sun, Jun 14 - Tue, Jun 23
LATAM Airlines Logo
1:30 pm - 5:00 am
STL
-
LIM
15h 30m
2 stops
LATAM Airlines Logo
8:55 am - 8:07 am
LIM
-
STL
23h 12m
2 stops
$779LATAM Airlines
Sat, Apr 11 - Sat, Apr 18
GOL Logo
5:24 am - 6:25 am
STL
-
CUZ
25h 01m
2 stops
GOL Logo
5:20 pm - 10:16 am
CUZ
-
STL
16h 56m
2 stops
$1,088GOL
Sat, Apr 11 - Sat, Apr 18
GOL Logo
8:00 am - 6:25 am
STL
-
CUZ
22h 25m
3 stops
GOL Logo
5:20 pm - 10:16 am
CUZ
-
STL
16h 56m
2 stops
$1,092GOL
Sun, Apr 26 - Sun, May 3
British Airways Logo
3:38 pm - 3:52 pm
STL
-
AQP
24h 14m
3 stops
British Airways Logo
12:10 pm - 1:22 pm
AQP
-
STL
25h 12m
3 stops
$1,223British Airways
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 $664 (return) on average. On the other hand, the most expensive months are March and June, when the average cost of round-trip tickets is $895 and $886 respectively.

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 3 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$227
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from St. Louis to Lima

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.

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 8292 reviews
8.1Boarding
7.8Entertainment
8.5Crew
7.2Food
7.9Comfort
Airline reviews

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

10.0 ExcellentAnonymous, Mar 2026
ATL - DTW
Read more Delta reviews

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

With Aeromexico it ended up good but with Delta it was bad because we did everything through Delta... Showed up at the Delta terminal... It was the wrong place! Nothing ever told us to go to the Aeromexico terminal. It said "in partnership with Aeromexico" but I was never instructed to check in with them or go to their terminal. We had to haul @$$ running through the airport and almost didn't make it thanks to this poor communication. 👎🏽

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Deleted flight made me loose my connection flight now stuck in Atlanta for a day

Good check in process Poor information on payments at Lima airport

Apart of Sky miles delta. And they go everywhere in Brazil

On board crew was very good. Crew was friendly, snacks were good, especially the chips. Seats seemed a bit cramped. Boarding seemed unorganized, as we were instructed to get to the gate an hour early and then just stood around until boarding.

We were not allowed to carry a bottle of water onto the 8 hour flight.

LATAM’s crews are fine, but God help you if you need any customer service. Their app and website never work, with error after error. Trying to solve anything over the phone is painful, and lastly, the boarding pass LATAM gave me to board the flight with Delta was invalid and I had to purchase an emergency one-way ticket at the last minute to get home.

We traveled with two young children, and it was not possible for our family to be seated together. No one offered help or assistance to organize seating so we could sit with our kids. In the end, we managed to find two seats in Economy so I could at least sit with one of them, even though I had originally paid for Comfort+. In summary, I had to downgrade my seat just to be able to sit with one of my children, which was very disappointing

I booked a flight through Kayak to Brazil I have traveled to Brazil several times before Kayak Delta or LATAM never mentioned during the booking or in the pre flight process that the visa requirements to visit Brazil have changed earlier this year. I was unaware of this change and as such never got a visa and was unable to fly from JFK to Sao Paulo Add to this that Delta allowed me to fly from Boston to JFK which they should not have as I didn’t have a visa. It has been a terrible experience and a huge loss of money

Latam may be the worst airline in the world, far worse than even the lowest of low cost airlines in the USA. I wasted hours trying to PAY THEM TO CHECK A BAG! Then they misled me at the terminal, sent me through the wrong security line, the list goes on and on... Just absolutely terrible in every way. Avoid at all costs.

we were missing our luggage, trying to find someone to have any empathy was pretty much not happening....

After changing the departure gate 5 times making us mo e from one side of the airport to the other and then back the flight was delayed nearly 2 hours. The male flight attendant had a bad attitude with the guest being condescending, disrespectful with people who were already on edge.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

It would have been nice if American tried to care.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

I booked 1st class, my flights were changed and I was sitting in the middle at the back of the plane. A far cry from the 1st class I purchased for my flights. I am grateful I arrived on time.

Aging planer and NO wifi on a 14 hour day flight. Unless you are retired or don't need to work or be in touch with the world... The lack of Wifif really ruined the flight. And the old plane - really showing it's age, wasn't great

There was no beverage service and the only time I saw a crew member walk through the cabin is when we were preparing to land.

Our flight was delayed 3 times and this is why I am giving such low reviews. Everything else was okay but being in the airport at 4:30pm for my initial flight at 7pm to not leave until after 9:30pm is insane,

Flights were constantly delayed. CRW took 50 minutes to get bags

Flight has been delayed every time I've ever taken it. Seats uncomfortable. Children behind me yelling the entire flight. Some of this is out of their control but overall just consistently not a great experience.

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

Information on your arrival and departure airports