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Peru

$604+ Cheap flights from St. Louis (STL) to Peru

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIM
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from St. Louis to Peru

Keep the following information in mind while searching for St. Louis to Peru flight deals. Data was last updated September 15, 2025.

Round-trip from

$604
(KAYAK)

Popular in

July

Cheapest in

February

Average price

$824
From Lambert-St Louis to Peru
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from St. Louis to Peru

Cheapest flights from St. Louis to Peru
Explore the most affordable flight options available from St. Louis to Peru. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This KAYAK deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/212:20 pmSTL - LIM
1 stop9h 38mSpirit Airlines
Fri 12/1211:59 pmLIM - STL
1 stop14h 54mSpirit Airlines
Deal found 9/14$604
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:57 amSTL - LIM
2 stops14h 23mMultiple Airlines
Thu 11/61:05 pmLIM - STL
1 stop29h 55mMultiple Airlines
Deal found 9/15$618
This American Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:10 amSTL - LIM
2 stops13h 15mAmerican Airlines
Wed 11/512:45 amLIM - STL
2 stops14h 51mAmerican Airlines
Deal found 9/15$638
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:00 amSTL - LIM
2 stops14h 15mDelta
Wed 11/512:05 amLIM - STL
1 stop17h 38mDelta
Deal found 9/15$645
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:00 amSTL - LIM
2 stops13h 15mDelta
Thu 12/1112:05 amLIM - STL
1 stop17h 30mDelta
Deal found 9/15$665
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/236:43 pmSTL - LIM
2 stops28h 12mUnited Airlines
Thu 12/41:50 amLIM - STL
1 stop15h 14mUnited Airlines
Deal found 9/14$669
This LATAM Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/236:00 amSTL - LIM
1 stop14h 20mLATAM Airlines
Fri 12/512:15 pmLIM - STL
1 stop12h 26mLATAM Airlines
Deal found 9/14$671
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/149:21 amSTL - LIM
1 stop10h 59mDelta
Fri 11/2111:40 pmLIM - STL
1 stop11h 43mDelta
Deal found 9/14$685
This LATAM Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:12 pmSTL - AQP
2 stops19h 48mLATAM Airlines
Wed 12/105:55 pmAQP - STL
2 stops17h 46mLATAM Airlines
Deal found 9/13$872
This LATAM Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:12 pmSTL - TPP
2 stops14h 48mLATAM Airlines
Wed 12/108:35 pmTPP - STL
2 stops15h 06mLATAM Airlines
Deal found 9/13$892
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/94:41 pmSTL - CUZ
2 stops46h 45mAmerican Airlines
Thu 11/1312:02 pmCUZ - STL
2 stops29h 09mAmerican Airlines
Deal found 9/13$1,055
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:08 pmSTL - CUZ
2 stops13h 11mAmerican Airlines
Tue 10/2810:02 pmCUZ - STL
2 stops25h 54mAmerican Airlines
Deal found 9/14$1,063

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Peru that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from St. Louis to Peru that are best for you.

Fly from

St. Louis

Fly to

Peru

Route

Depart

Return

Price

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Thu 10/30

10:10 am-11:25 pm

2 stops13h 15m

Lima J Chavez Intl

Wed 11/5

12:45 am-2:36 pm

2 stops14h 51m

$638

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Mon 3/2

7:30 am-8:55 pm

1 stop12h 25m

Lima J Chavez Intl

Sun 3/8

12:05 am-8:39 pm

2 stops20h 34m

$644

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Mon 12/8

5:12 pm-5:00 am

1 stop10h 48m

Lima J Chavez Intl

Mon 12/15

12:15 pm-11:41 pm

1 stop12h 26m

$645

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Wed 12/10

5:28 pm-5:00 am

1 stop10h 32m

Lima J Chavez Intl

Wed 12/17

12:15 pm-9:58 pm

1 stop10h 43m

$645

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Tue 11/18

5:12 pm-5:00 am

1 stop10h 48m

Lima J Chavez Intl

Tue 11/25

12:15 pm-9:58 pm

1 stop10h 43m

$645

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Thu 12/11

5:12 pm-5:00 am

1 stop10h 48m

Lima J Chavez Intl

Thu 12/18

12:15 pm-9:58 pm

1 stop10h 43m

$645

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Thu 10/30

11:21 am-9:20 pm

1 stop9h 59m

Lima J Chavez Intl

Thu 11/6

11:40 pm-2:43 pm

1 stop16h 03m

$645

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Mon 11/24

5:12 pm-5:00 am

1 stop10h 48m

Lima J Chavez Intl

Mon 12/1

11:40 pm-4:07 pm

1 stop17h 27m

$645

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Thu 12/4

5:12 pm-5:00 am

1 stop10h 48m

Lima J Chavez Intl

Thu 12/11

12:15 pm-11:41 pm

1 stop12h 26m

$645

St. LouisLima

STL - LIM

STLLIM

Lambert-St Louis

Mon 11/17

5:12 pm-5:00 am

1 stop10h 48m

Lima J Chavez Intl

Mon 11/24

12:15 pm-9:58 pm

1 stop10h 43m

$645

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 15 results
1
2

Best time to book a flight from St. Louis to Peru

Have a flexible travel schedule? Discover the best time to fly to Peru from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from St. Louis to Peru?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Peru (average of $499). Flying from St. Louis to Peru in December is currently the most expensive (average of $802). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to PE?

Find hourly flight availability from St. Louis to Peru. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from St. Louis to Peru, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Peru

Get insights into the airlines that provide service to Peru. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Peru. Reviews last updated September 15, 2025.
Read through reviews of airlines operating flights from St. Louis to Peru, such as Delta, LATAM Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LATAM Airlines
7.5
Good
1,847 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Peru. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Peru?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Peru. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

  • How long is the flight from St. Louis to Peru?

    There are many flights that can get you from St. Louis to Peru in 12h 25m. Fly via American Airlines, Delta, or LATAM Airlines to get the fastest option. The distance from St. Louis to Peru is about 3608 mi. This flight may include one or multiple stops.

  • What are the most popular routes from St. Louis to Peru?

    The most popular route from St. Louis to Peru is Lambert-St Louis - Lima J Chavez Intl. You may also consider Lambert-St Louis - Cusco Velazco Astete or Lambert-St Louis - Arequipa Rodriguez Ballon.

  • Can I find deals for flights from St. Louis to Peru that include hotel bookings?

    Yes. In addition to deals on St. Louis to Peru flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Peru?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Peru.

  • Can I find deals for business class flights from St. Louis to Peru?

    Yes. Cheapflights offers flight deals from St. Louis to Peru by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Peru?

    Currently, April is the cheapest month in which you can book a flight from St. Louis to Peru (average of $499). Flying from St. Louis to Peru in December is currently the most expensive (average of $802). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Peru

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from St. Louis to Peru

Discover the top 3 airlines that operate flights from St. Louis to Peru. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$633Average$814FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$659Average$879FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$668Average$873FlexibilityNo cancel feeOn-time71%

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