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Key Largo

$58+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MIA
Nov 10 — Nov 171
Sun 11/10
Sun 11/17
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 53 days in advance, depart on a Tuesday or Wednesday and return on a Saturday

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 5, 2024.

Popular in

March

Cheapest in

September

Round-trip from

$129
(Mytrip)

One-way from

$58
(Mytrip)
High demand for flights, 15% potential price rise
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Best time to find cheap flights, 14% 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 5, 2024.

This Mytrip deal was found by Cheapflights users on 11/4. 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 12/412:00 pmSTL - MIA
2 stops11h 20mMultiple Airlines
Wed 12/114:38 pmMIA - STL
2 stops25h 07mMultiple Airlines
Deal found 11/4$228
This Mytrip deal was found by Cheapflights users on 11/4. 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.
Fri 12/66:46 pmSTL - MIA
1 stop30h 06mFrontier
Thu 12/126:00 amMIA - STL
1 stop27h 13mFrontier
Deal found 11/4$229
This FareScan deal was found by Cheapflights users on 11/4. 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 FareScan is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/54:26 pmSTL - MIA
2 stops28h 04mSpirit Airlines
Mon 12/95:48 amMIA - STL
2 stops34h 33mSpirit Airlines
Deal found 11/4$317
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Fri 11/291:40 pmSTL - MIA
1 stop6h 41mAmerican Airlines
Thu 12/59:05 pmMIA - STL
Nonstop3h 05mAmerican Airlines
Deal found 11/5$354
This Delta deal was found by Cheapflights users on 11/4. 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.
Mon 12/96:01 amSTL - MIA
1 stop15h 46mDelta
Wed 1/296:00 amMIA - STL
1 stop4h 54mDelta
Deal found 11/4$367
This Southwest deal was found by Cheapflights users on 11/4. 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.
Wed 12/46:50 amSTL - MIA
2 stops11h 55mSouthwest
Wed 2/127:05 amMIA - STL
1 stop11h 05mSouthwest
Deal found 11/4$378
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/2812:37 pmSTL - MIA
1 stop6h 48mUnited Airlines
Tue 12/31:00 pmMIA - STL
1 stop8h 51mUnited Airlines
Deal found 11/4$384
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/97:00 amSTL - MIA
1 stop32h 35mAlaska Airlines
Thu 12/126:55 pmMIA - STL
2 stops30h 04mAlaska Airlines
Deal found 11/5$482

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 2,554,862 searches. Data last updated November 5, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Mon 2/3

6:46 pm-11:22 pm

1 stop27h 36m

$58

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 12/4

12:15 pm-12:20 am

2 stops11h 05m

$103

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 12/17

4:26 pm-10:00 pm

2 stops28h 34m

$151

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 1/1

11:10 am-5:53 pm

1 stop5h 43m

$164

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Mon 2/3

4:44 pm-8:32 pm

Nonstop2h 48m

$166

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 1/7

12:00 pm-9:42 pm

1 stop8h 42m

$174

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 2/11

7:50 am-6:35 pm

2 stops9h 45m

$179

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Mon 3/3

7:00 am-6:47 pm

2 stops34h 47m

$217

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 2/12

8:00 pm-12:41 am

1 stop27h 41m

Miami

Wed 2/19

5:16 am-1:22 pm

1 stop9h 06m

$211

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 12/4

12:00 pm-12:20 am

2 stops11h 20m

Miami

Wed 12/11

4:38 pm-4:45 pm

2 stops25h 07m

$228

Flights are sorted by cheapest first

Deals found on 11/4

Showing 1-10 of 15 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 1, 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 53 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.

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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 $287). 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 5, 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 3, 2024.

Travelers seeking maximum savings on their St. Louis to Key Largo flight should consider departing on Tuesday 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.

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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 5, 2024.
Peruse reviews from past customers who have flown with Spirit Airlines, United Airlines and Delta 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
5,082 reviews

Boarding

8.3

Crew

8.7

Overall

8.1

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

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

Southwest
8.1
Very good
5,082 reviews
Southwest
8.1
Very good
5,082 reviews

Boarding

8.3

Crew

8.7

Overall

8.1

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

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

Alaska Airlines
8.0
Very good
9,421 reviews
Southwest
8.1
Very good
5,082 reviews

Boarding

8.3

Crew

8.7

Overall

8.1

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

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

Delta
8.0
Very good
8,830 reviews
Southwest
8.1
Very good
5,082 reviews

Boarding

8.3

Crew

8.7

Overall

8.1

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

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

United Airlines
7.4
Good
9,215 reviews
Southwest
8.1
Very good
5,082 reviews

Boarding

8.3

Crew

8.7

Overall

8.1

Food

7.2

Comfort

8.1

Entertainment

7.7

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
5,082 reviews

Boarding

8.3

Crew

8.7

Overall

8.1

Food

7.2

Comfort

8.1

Entertainment

7.7

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 1 outbound flight to Key Largo per day. 6 airlines have flights to Key Largo from Lambert-St Louis on a regular basis.

  • Can I find flights from St. Louis to Key Largo for under $200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Key Largo for under $200. The cheapest flight booked recently is on Frontier for just $129, but on average you can expect to pay $295.

  • Are there nonstop flights from St. Louis to Key Largo for under $400 on Cheapflights?

    Cheapflights has at least 2 direct flights from St. Louis to Key Largo under $400. A good price for a nonstop flight from St. Louis to Key Largo is less than $340.

  • Are there last-minute flights available from St. Louis to Key Largo for under $300?

    There are currently 7+ open flights from St. Louis to Key Largo within the next 7 days for less than $300.

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

    The Lambert-St Louis to Key Largo flight path was viewed by 4 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 $58. Users have also found prices from $151 and $164 on Spirit Airlines and United 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 GOL (94%), American Airlines (93%) and Qatar Airways (93%).

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

    On average you can expect to pay $759 for a flight from St. Louis to Key Largo. The cheapest flight overall is $147 while the most popular route, (Lambert-St Louis - Miami) is currently priced at $164.

  • What does STL to MIA mean?

    Lambert-St Louis Airport is STL and Miami Airport is MIA. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Fort Lauderdale Airport (FLL), Key West Airport (EYW), Miami Opa Locka Airport (OPF), Fort Lauderdale Executive Airport (FXE), Boca Raton Airport (BCT).

  • Can I find deals for flights from St. Louis to Key Largo that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Key Largo flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Key Largo with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Key Largo flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from St. Louis to Key Largo that allow pets onboard?

    Many airlines flying from St. Louis to Key Largo offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Key Largo?

    Yes, you can often find last-minute deals on St. Louis to Key Largo flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Key Largo flight deals updated?

    The St. Louis to Key Largo flight deals you see on this page were last updated on 11/5.

  • 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 $287). 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

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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 2,554,862 searches. Data last updated November 5, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$73Average$150FlexibilityNo cancel feeOn-time65%
FrontierCheapest$147Average$236FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$178Average$408FlexibilityNo cancel feeOn-time63%
DeltaCheapest$218Average$419FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$223Average$391FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$287Average$503FlexibilityNo cancel feeOn-time69%
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