Cheap flights from Key Largo to St. Louis (STL)

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The best prices from Key Largo to Lambert-St Louis are usually found in June or August, booked 49 days in advance, depart on a Saturday or Thursday and return on a Tuesday

How to find the cheapest flight from
Key Largo to St. Louis (STL)

All the information you need to plan the best null to STL flight in 2022: compare Key Largo to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.
KE9 - STL
Price
$203 - $322
STL
Temperature
32 - 80.6 °F
STL
Rainfall
2.2 - 4.7 inches

Popular in

February

High demand for flights, 13% potential price rise

Cheapest in

June

Best time to find cheap flights, 28% potential price drop

Round-trip from

$203

From Key Largo to Lambert-St Louis

One-way from

$119

One-way flight from Key Largo to Lambert-St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
When is the cheapest time to fly from Key Largo to St. Louis (KE9 - STL)?

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.

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

Find a great deal and save up to 47% by booking at least 43 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Key Largo to St. Louis within the next two weeks, with the cheapest ticket starting at $316.

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

June can be a great time to fly to St. Louis from Key Largo with a flight ticket averaging about $280. Cheapflights users have found deals in the month of June for as cheap as $161. The most expensive prices can be found in the month of February.

Cheap flights from Key Largo to St. Louis in May, June 2022

The best prices found for Key Largo to STL flights for May, June
13 Jun - 22 Jun
$177pp
MIA
Miami
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
MIA
Miami
3 Jun - 6 Jun
$182pp
MIA
Miami
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
MIA
Miami
19 May - 23 May
$185pp
MIA
Miami
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
MIA
Miami

Key Largo to St. Louis 2022 flight deals

Cheap flights to St. Louis from Key Largo found for this year
13 Jun - 22 Jun
$177pp
MIA
Miami
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
MIA
Miami
3 Jun - 6 Jun
$182pp
MIA
Miami
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
MIA
Miami
19 May - 23 May
$185pp
MIA
Miami
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
MIA
Miami

Non-stop flights to St. Louis from Key Largo

Save time with Key Largo to St. Louis direct flight deals
22 Sep - 24 Sep
$218pp
MIA
Miami
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
MIA
Miami
20 Sep - 4 Oct
$238pp
MIA
Miami
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
MIA
Miami
16 Sep - 19 Sep
$258pp
MIA
Miami
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
MIA
Miami

Last minute flights from Key Largo to St. Louis

Late deals on round-trip flights to St. Louis from Key Largo, departing today and this week
22 May - 23 May
$208pp
MIA
Miami
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
MIA
Miami
26 May - 1 Jun
$222pp
MIA
Miami
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
MIA
Miami
22 May - 23 May
$240pp
MIA
Miami
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
MIA
Miami

One-way flights to Lambert-St Louis from Key Largo

The cheapest one-way flights from Key Largo to St. Louis
7:25 am - 3:28 pm
Delta
1 Stop
9h 03m
MIA - STL
Delta
$119
Delta
3:28 am - 12:09 pm
American Airlines
2 Stops
9h 41m
MIA - STL
American Airlines
2:40 am - 1:06 pm
Spirit Airlines
1 Stop
11h 26m
MIA - STL
Spirit Airlines
$133
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Key Largo</span> to <span class="emphasized">St. Louis</span> flights.

Flight FAQs

From Key Largo to St. Louis

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 7 different airlines.

Which airlines flying from Key Largo to Lambert-St Louis have flexible cancellations due to COVID-19?

Some of our airline partners flying from Key Largo to Lambert-St Louis have new flexible policies in place due to COVID-19. American Airlines, Spirit Airlines, and Frontier are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

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

Yes, there are multiple flights from Key Largo to St. Louis for under $200. The cheapest flight booked recently is on Frontier for just $177, but on average you can expect to pay $213.

Are there nonstop flights from Key Largo to St. Louis for under $300 on Cheapflights?

Cheapflights has at least 20 direct flights from Key Largo to St. Louis under $300. A good price for a nonstop flight from Key Largo to St. Louis is less than $353.

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

There are currently 20+ open flights from Key Largo to St. Louis within the next 7 days for less than $300.

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

Flights from Key Largo to Lambert-St Louis have been viewed 14 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 Spirit Airlines, which is currently one of the cheapest options available, starting at $61. Frontier flights start at $88 while deals on Delta start at $108 one-way.

What are the most popular airlines that fly from Key Largo to St. Louis?

Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from Key Largo to St. Louis.

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: Envoy Air (91%), American Airlines (68%), Qatar Airways( 66%).

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

Looking at all options, your cheapest flight can be booked for $62. While the most popular route (Miami - Lambert-St Louis) can be booked for $185 on average our data indicates $529 when flying from Key Largo to St. Louis.

COVID Restrictions

View COVID Travel Restrictions for St. Louis, MO

Do I need a COVID test to fly to St. Louis from Key Largo?

Information is based on travel restrictions for travel to Lambert-St Louis within the United States

Most visitors from Key Largo need to provide a negative COVID-19 test result and/or quarantine to enter Lambert-St Louis.

COVID-19 testing requirements
Visitors from Key Largo must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Lambert-St Louis.

Quarantine requirements
Visitors from Key Largo are not required to quarantine after entering Lambert-St Louis.

Do I need a test to fly back to Key Largo from St. Louis?

Returning to Key Largo from Lambert-St Louis

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Key Largo.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Key Largo.

Hide COVID Travel Restrictions for St. Louis, MO

Alternative routes for Key Largo to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for St. Louis

Things to know before you go - useful duration and weather info for your trip from Key Largo to St. Louis.
Flight duration from Key Largo to STL
2h 47m
Average temperature for May in St. Louis
78.8 °F
Avg rainfall for May in St. Louis
5.1 ″

Airports servicing Key Largo

Airports servicing St. Louis

Top 4 airlines flying from Key Largo to Lambert-St Louis

The chart below displays the airlines Cheapflights users traveling from Key Largo to St. Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$41 $106 No cancel fee 62%
Spirit Airlines
$50 $119 No cancel fee 65%
American Airlines
$86 $267 No cancel fee 71%
Delta
$137 $399 No cancel fee N/A

Hourly flight availability from Key Largo to St. Louis

See what time of day planes typically take off from Key Largo towards St. Louis.
Evening 6 PM to midnight 46% of Key Largo to STL departures
Afternoon Noon to 6 PM 27% of Key Largo to STL departures
Morning 6 AM to noon 16% of Key Largo to STL departures
Early morning Midnight to 6 AM 11% of Key Largo to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Key Largo to St. Louis
See how many times per day planes take to the skies headed from Key Largo to St. Louis.
Sunday
5 daily flights
Monday
5 daily flights
Tuesday
3 daily flights
Wednesday
5 daily flights
Thursday
4 daily flights
Friday
5 daily flights
Saturday
5 daily flights
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