HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$65+ Cheap flights from Key Largo, FL to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — STL
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Key Largo to St. Louis with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Key Largo to Lambert-St Louis are usually found in September or July, booked 59 days in advance, depart on a Thursday or Saturday and return on a Tuesday

Cheap flight deals from Key Largo to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Key Largo (KE9) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 21, 2024.

Popular in

January

Cheapest in

September

Round-trip from

$158
(FlightHub)

One-way from

$65
(CheapOair)
High demand for flights, 36% potential price rise
Search Deals
Best time to find cheap flights, 23% potential price drop
Search Deals
From Key Largo to Lambert-St Louis
Search Deals
One-way flight from Key Largo to Lambert-St Louis
Search Deals

Find flight deals from Key Largo to St. Louis

Cheapest flights from Key Largo to St. Louis
Explore the most affordable flight options available from Key Largo to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This CheapOair deal was found by Cheapflights users on 11/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/56:00 amMIA - STL
1 stop27h 13mFrontier
Wed 12/116:46 pmSTL - MIA
1 stop30h 06mFrontier
Deal found 11/20$158
This Mytrip deal was found by Cheapflights users on 11/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/124:38 pmMIA - STL
2 stops19h 52mMultiple Airlines
Mon 12/165:00 pmSTL - MIA
2 stops30h 20mMultiple Airlines
Deal found 11/20$264
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Sat 12/288:35 pmMIA - STL
Nonstop3h 13mAmerican Airlines
Wed 1/15:15 amSTL - MIA
Nonstop2h 54mAmerican Airlines
Deal found 11/20$349
This Delta deal was found by Cheapflights users on 11/20. 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 12/207:45 pmMIA - STL
1 stop4h 55mDelta
Tue 12/247:15 amSTL - MIA
1 stop6h 09mDelta
Deal found 11/20$368
This United Airlines deal was found by Cheapflights users on 11/20. 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.
Thu 12/124:35 pmMIA - STL
1 stop6h 38mUnited Airlines
Mon 12/1610:10 amSTL - MIA
1 stop5h 47mUnited Airlines
Deal found 11/20$426
This Southwest deal was found by Cheapflights users on 11/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1712:00 pmMIA - STL
2 stops9h 45mSouthwest
Thu 12/195:50 amSTL - MIA
1 stop9h 50mSouthwest
Deal found 11/20$433

Find flights from Key Largo to St. Louis within your budget

Customize your flight search to find flights from Key Largo to St. Louis 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 2,612,795 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Thu 12/5

6:00 am-8:13 am

1 stop27h 13m

Lambert-St Louis

Wed 12/11

6:46 pm-1:52 am

1 stop30h 06m

$158

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Fri 2/7

6:00 am-9:54 am

1 stop4h 54m

Lambert-St Louis

Sun 2/9

2:00 pm-9:27 pm

1 stop6h 27m

$196

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Sat 2/8

6:00 am-12:45 pm

1 stop7h 45m

Lambert-St Louis

Sun 2/16

4:33 pm-8:24 pm

Nonstop2h 51m

$255

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Thu 1/16

8:45 am-2:37 pm

1 stop6h 52m

Lambert-St Louis

Thu 1/23

9:44 am-8:22 pm

2 stops9h 38m

$289

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Thu 1/16

10:00 am-7:55 pm

2 stops34h 55m

Lambert-St Louis

Thu 1/23

5:00 pm-5:48 pm

2 stops23h 48m

$297

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Sat 2/8

6:00 am-8:05 am

Nonstop3h 05m

Lambert-St Louis

Sun 2/16

8:40 am-12:25 pm

Nonstop2h 45m

$370

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Fri 1/24

5:55 pm-6:23 pm

2 stops25h 28m

Lambert-St Louis

Mon 1/27

2:49 pm-6:15 pm

2 stops26h 26m

$602

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Thu 1/30

6:14 pm-9:16 am

1 stop16h 02m

$65

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Wed 2/19

6:00 am-11:47 am

1 stop6h 47m

$98

MiamiSt. Louis

MIA - STL

MIASTL

Miami

Fri 1/31

5:15 pm-7:25 pm

Nonstop3h 10m

$100

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

Showing 1-10 of 15 results
1
2

Best time to book a flight from Key Largo to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Key Largo 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.

Travel insights for flights from Key Largo to St. Louis

Get recent, data-driven insights about flights from Key Largo to St. Louis including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Key Largo to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to St. Louis. Price data was last updated on November 15, 2024.

The price you pay for your flight from Key Largo to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 58 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from Key Largo to St. Louis (average of $308). Flying from Key Largo to St. Louis in March is currently the most expensive (average of $357). 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 KE9 to STL?

Find hourly flight availability from Key Largo to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2024.

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

What is the cheapest day to fly from Key Largo to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to St. Louis. Price data was last updated on June 23, 2024.

Travelers seeking maximum savings on their Key Largo to St. Louis flight should consider departing on Thursday at noon when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Key Largo to St. Louis

Explore weekly flight availability from Key Largo to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 21, 2024.

The most flights from KE9 to STL are scheduled on a Wednesday (6 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated November 21, 2024.
See what other customers who have flown with Frontier, Delta and American Airlines from Key Largo to St. Louis have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,005 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,464 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,755 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,172 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from Key Largo to St. Louis. 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 into for flights to St. Louis from Key Largo?

    If you book a flight to St. Louis from Key Largo, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 4 flights from Key Largo to Lambert-St Louis per day from 6 different airlines.

  • How popular is this Key Largo to St. Louis flight route?

    Flights from Key Largo to Lambert-St Louis have been viewed 3 times in the past calendar month.

  • What are the cheapest airlines to fly from Key Largo to St. Louis one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $65. Delta flights start at $98 while deals on Southwest start at $100 one-way.

  • What are the most reliable airlines from Key Largo to St. Louis?

    Before booking your flight to St. Louis from Key Largo, check out the most reliable airlines to get you to your destination on time: Southwest (93%), GOL (92%), Envoy Air( 91%).

  • What are the cheapest flights from Key Largo to St. Louis?

    Looking at all options, your cheapest flight can be booked for $137. While the most popular route (Miami - Lambert-St Louis) can be booked for $260 on average our data indicates $348 when flying from Key Largo to St. Louis.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Key Largo to St. Louis 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 Key Largo to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from Key Largo to St. Louis (average of $308). Flying from Key Largo to St. Louis in March is currently the most expensive (average of $357). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Key Largo to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Orlando to St. Louis flights
Orlando to Kansas City flights
Tampa to Kansas City flights
Miami to St. Louis flights
Tampa to St. Louis flights
Miami to Kansas City flights
Jacksonville to Kansas City flights
Jacksonville to St. Louis flights
Fort Lauderdale to Kansas City flights
Fort Lauderdale to St. Louis flights
Sarasota to Kansas City flights
Tampa to Springfield flights
West Palm Beach to St. Louis flights
Fort Myers to Kansas City flights
Gainesville to Kansas City flights
Pensacola to Kansas City flights
Orlando to Springfield flights
Jacksonville to Springfield flights
Fort Myers to St. Louis flights
West Palm Beach to Kansas City flights
Fort Lauderdale to Springfield flights
Sarasota to St. Louis flights
Panama City to St. Louis flights
West Palm Beach to Springfield flights
Fort Myers to Springfield flights
Daytona Beach to Kansas City flights
Melbourne to St. Louis flights
Melbourne to Kansas City flights
Sarasota to Springfield flights
Panama City to Kansas City flights
Pensacola to St. Louis flights
Miami to Springfield flights
Orlando to Joplin flights
Daytona Beach to St. Louis flights
Gainesville to St. Louis flights
Tallahassee to Kansas City flights
Sarasota to Joplin flights
Tallahassee to St. Louis flights
Panama City to Springfield flights
Valparaiso to St. Louis flights
Jacksonville to Joplin flights
Valparaiso to Kansas City flights
Daytona Beach to Springfield flights
Orlando to Columbia flights
Melbourne to Springfield flights
Pensacola to Columbia flights
Melbourne to Joplin flights
Daytona Beach to Joplin flights
Tampa to Columbia flights
Pensacola to Springfield flights

Top 6 airlines flying from Key Largo to St. Louis

Discover the top 6 airlines that operate flights from Key Largo to St. Louis. 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 2,612,795 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$87Average$152FlexibilityNo cancel feeOn-time65%
FrontierCheapest$128Average$243FlexibilityNo cancel feeOn-time62%
DeltaCheapest$199Average$398FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$209Average$345FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$258Average$373FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$290Average$388FlexibilityNo cancel feeOn-time69%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines