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Key Largo

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

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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MIA
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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The best prices from Lambert-St Louis to Key Largo are usually found in September or August, booked 78 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from St. Louis to Key Largo

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Key Largo (KE9). 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

March

Cheapest in

September

Round-trip from

$319
(American Airlines)

One-way from

$65
(CheapOair)
High demand for flights, 17% potential price rise
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Best time to find cheap flights, 15% potential price drop
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From Lambert-St Louis to Key Largo
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One-way flight from Lambert-St Louis to Key Largo
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Find flight deals from St. Louis to Key Largo

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

This American Airlines deal was found by Cheapflights users on 11/21. 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 11/285:07 amSTL - MIA
Nonstop2h 53mAmerican Airlines
Fri 11/299:57 pmMIA - STL
Nonstop3h 00mAmerican Airlines
Deal found 11/21$319
This Mytrip deal was found by Cheapflights users on 11/21. 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.
Wed 12/111:00 pmSTL - MIA
2 stops34h 20mMultiple Airlines
Wed 12/181:42 pmMIA - STL
2 stops22h 48mMultiple Airlines
Deal found 11/21$327
This Mytrip deal was found by Cheapflights users on 11/21. 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.
Sat 12/144:26 pmSTL - MIA
3 stops20h 52mSpirit Airlines
Wed 12/189:45 amMIA - STL
3 stops30h 36mSpirit Airlines
Deal found 11/21$330
This Delta deal was found by Cheapflights users on 11/21. 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 11/2811:50 amSTL - MIA
1 stop4h 07mDelta
Fri 11/298:30 amMIA - STL
1 stop4h 34mDelta
Deal found 11/21$338
This United Airlines deal was found by Cheapflights users on 11/21. 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 12/1910:35 amSTL - MIA
1 stop6h 58mUnited Airlines
Thu 12/267:00 pmMIA - STL
1 stop5h 59mUnited Airlines
Deal found 11/21$419
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.
Sun 12/85:55 amSTL - MIA
1 stop6h 35mSouthwest
Thu 12/124:30 pmMIA - STL
2 stops6h 35mSouthwest
Deal found 11/20$462
This Booking.com deal was found by Cheapflights users on 11/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/225:38 pmSTL - MIA
1 stop29h 38mFrontier
Tue 11/266:15 amMIA - STL
1 stop18h 51mFrontier
Deal found 11/21$583

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

Customize your flight search to find flights from St. Louis to Key Largo 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

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sun 1/5

12:15 pm-11:25 pm

3 stops34h 10m

Miami

Sun 1/12

10:00 am-11:45 am

2 stops26h 45m

$319

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sun 1/5

10:09 pm-5:00 am

1 stop29h 51m

Miami

Sun 1/12

6:00 am-9:06 am

1 stop28h 06m

$323

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Thu 1/16

1:55 pm-9:35 pm

1 stop6h 40m

Miami

Tue 1/21

4:40 pm-10:05 pm

1 stop6h 25m

$324

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Thu 12/5

4:26 pm-9:30 pm

3 stops28h 04m

Miami

Sat 12/7

9:28 pm-3:21 pm

2 stops18h 53m

$325

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 12/25

6:00 am-10:01 am

Nonstop3h 01m

Miami

Wed 1/1

5:18 am-10:45 am

1 stop6h 27m

$329

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sun 1/5

5:00 am-3:43 pm

2 stops9h 43m

Miami

Fri 1/10

9:00 am-2:14 pm

1 stop6h 14m

$344

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 12/11

7:15 am-1:10 pm

1 stop4h 55m

Miami

Tue 12/17

7:00 am-12:03 pm

1 stop6h 03m

$432

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Fri 2/21

3:21 pm-6:47 pm

2 stops26h 26m

Miami

Mon 3/3

7:52 pm-2:25 pm

2 stops19h 33m

$492

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 1/29

7:09 pm-1:54 am

1 stop29h 45m

$65

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 1/21

2:00 pm-9:27 pm

1 stop6h 27m

$98

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

Showing 1-10 of 16 results
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Best time to book a flight from St. Louis to Key Largo

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

Travel insights for flights from St. Louis to Key Largo

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

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

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

To ensure you get the cheapest price possible for a flight from St. Louis to Key Largo, you should look to book at least 78 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, September is the cheapest month in which you can book a flight from St. Louis to Key Largo (average of $218). Flying from St. Louis to Key Largo in March is currently the most expensive (average of $286). 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 KE9?

Find hourly flight availability from St. Louis to Key Largo. 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.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Key Largo as you normally would.

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

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Key Largo. Price data was last updated on November 18, 2024.

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

Weekly flight availability from St. Louis to Key Largo

Explore weekly flight availability from St. Louis to Key Largo. 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 STL to KE9 are scheduled on a Thursday (6 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Key Largo by month

Plan your trip to Key Largo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Key Largo ranges from 1.6 - 9.9 inches per month. September is typically the wettest month, when rainfall can reach 9.9 in. January is typically the driest time to visit Key Largo when rainfall is around 1.6 in.

Temperature in Key Largo by month

Plan your trip to Key Largo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Key Largo, 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 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 68.0 F).

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. 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 Key Largo. Reviews last updated November 21, 2024.
Peruse reviews from past customers who have flown with Frontier, Spirit Airlines and United Airlines from St. Louis to Key Largo to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,005 reviews

Boarding

8.2

Entertainment

7.7

Food

7.2

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

Boarding

8.2

Entertainment

7.7

Food

7.2

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

Boarding

8.2

Entertainment

7.7

Food

7.2

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

Boarding

8.2

Entertainment

7.7

Food

7.2

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

Boarding

8.2

Entertainment

7.7

Food

7.2

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

Boarding

8.2

Entertainment

7.7

Food

7.2

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 St. Louis to Key Largo. 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 Key Largo?

    For a flight from St. Louis to Key Largo, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 3 outbound flights to Key Largo per day. 6 airlines have flights to Key Largo from Lambert-St Louis on a regular basis.

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

    The Lambert-St Louis to Key Largo flight path was viewed by 6 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $65. Users have also found prices from $147 and $159 on Spirit Airlines and American Airlines, respectively.

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

    The top 3 most reliable airlines when flying from St. Louis to Key Largo are Envoy Air (100%), American Airlines (97%) and Qatar Airways (97%).

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

    On average you can expect to pay $756 for a flight from St. Louis to Key Largo. The cheapest flight overall is $182 while the most popular route, (Lambert-St Louis - Miami) is currently priced at $148.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Key Largo (average of $218). Flying from St. Louis to Key Largo in March is currently the most expensive (average of $286). 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.

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Top 6 airlines flying from St. Louis to Key Largo

Discover the top 6 airlines that operate flights from St. Louis to Key Largo. 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$74Average$148FlexibilityNo cancel feeOn-time65%
FrontierCheapest$147Average$233FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$216Average$422FlexibilityNo cancel feeOn-time63%
DeltaCheapest$218Average$419FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$222Average$394FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$287Average$493FlexibilityNo cancel feeOn-time69%
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