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Cheap flights from St. Louis (STL) to Key Largo, FL from $75

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 5/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — MIA
May 8 — May 151
From?
To?
Wed 5/8
Wed 5/15
1 adult, Economy
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The best prices from Lambert-St Louis to Key Largo are usually found in September or January, booked 83 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 May 3, 2024.

Popular in

March

Cheapest in

September

Round-trip from

$209

One-way from

$128
High demand for flights, 19% potential price rise
Search Deals
Best time to find cheap flights, 15% potential price drop
Search Deals
From Lambert-St Louis to Key Largo
Search Deals
One-way flight from Lambert-St Louis to Key Largo
Search Deals

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

Users have found that booking a flight from St. Louis to Key Largo at least 57 days early can save you up to 86% on average compared to booking a flight this week. If booking 57 days before your flight isn’t an option for you, users have found flights from St. Louis to Key Largo for as little as $388 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $553 for flights departing within the next 3 days.

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

September is one of the best times of the year to fly to Key Largo from St. Louis. Prices for September average $385 per person but you can even find prices for as low as $199. The most expensive prices can be found in the month of March. Opting for a September flight can save you 23% on your journey compared to booking in March

When is the cheapest time to fly from St. Louis to Key Largo (STL - KE9)?

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.

Cheap Frontier flights from St. Louis to Key Largo

Explore cheap flight options specifically provided by Frontier for the route between St. Louis and Key Largo. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 3, 2024.
Peruse some of the lowest-priced Frontier flights we've found from St. Louis to Key Largo. Deals update often to give you more flight options matching your criteria
Tue 5/144:50 pmSTL - MIA
1 stop12h 13mFrontier
Thu 5/231:40 pmMIA - STL
1 stop9h 26mFrontier
Deal found 4/30$150
Sat 6/88:02 pmSTL - MIA
1 stop8h 51mFrontier
Sat 6/155:15 amMIA - STL
1 stop10h 03mFrontier
Deal found 5/2$156
Thu 5/1611:06 pmSTL - MIA
1 stop29h 54mFrontier
Mon 5/207:35 amMIA - STL
1 stop30h 34mFrontier
Deal found 5/1$163
Mon 5/138:04 pmSTL - MIA
1 stop8h 59mFrontier
Thu 5/231:40 pmMIA - STL
1 stop9h 26mFrontier
Deal found 4/30$164
Fri 5/178:45 pmSTL - MIA
1 stop26h 47mFrontier
Mon 5/207:35 amMIA - STL
1 stop30h 34mFrontier
Deal found 5/1$167
Sat 6/158:02 pmSTL - MIA
1 stop27h 58mFrontier
Sat 6/225:15 amMIA - STL
1 stop10h 03mFrontier
Deal found 5/2$169
Mon 8/268:00 pmSTL - MIA
1 stop27h 41mFrontier
Tue 9/33:21 pmMIA - STL
1 stop19h 16mFrontier
Deal found 5/1$174
Fri 5/178:45 pmSTL - MIA
1 stop26h 47mFrontier
Mon 5/207:35 amMIA - STL
1 stop30h 34mFrontier
Deal found 5/1$178
Sat 8/108:00 pmSTL - MIA
1 stop8h 59mFrontier
Tue 8/133:21 pmMIA - STL
1 stop19h 16mFrontier
Deal found 5/1$180

Cheap Spirit Airlines flights from St. Louis to Key Largo

Explore cheap flight options specifically provided by Spirit Airlines for the route between St. Louis and Key Largo. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 3, 2024.
Have a look at some of the cheapest available Spirit Airlines flights departing from St. Louis and landing in Key Largo. Check back soon if you're not seeing flights that suit your needs.
Sat 5/1111:39 amSTL - MIA
2 stops13h 01mSpirit Airlines
Tue 5/1410:11 amMIA - STL
2 stops25h 35mSpirit Airlines
Deal found 5/2$163
Fri 5/174:05 pmSTL - MIA
2 stops32h 35mSpirit Airlines
Mon 5/205:45 amMIA - STL
3 stops28h 54mSpirit Airlines
Deal found 5/1$197
Mon 5/134:05 pmSTL - MIA
2 stops27h 52mSpirit Airlines
Wed 5/159:45 amMIA - STL
3 stops33h 55mSpirit Airlines
Deal found 5/1$200
Mon 5/274:05 pmSTL - MIA
1 stop23h 13mSpirit Airlines
Wed 5/295:25 amMIA - STL
2 stops37h 04mSpirit Airlines
Deal found 5/1$207
Fri 5/174:05 pmSTL - MIA
2 stops27h 11mSpirit Airlines
Mon 5/205:45 amMIA - STL
3 stops28h 54mSpirit Airlines
Deal found 5/1$211
Sat 5/115:15 pmSTL - MIA
3 stops27h 30mSpirit Airlines
Tue 5/1410:11 amMIA - STL
2 stops25h 35mSpirit Airlines
Deal found 5/2$214
Sat 5/2511:39 amSTL - MIA
2 stops11h 30mSpirit Airlines
Wed 5/295:25 amMIA - STL
2 stops37h 04mSpirit Airlines
Deal found 5/1$221
Fri 5/174:05 pmSTL - MIA
3 stops32h 35mSpirit Airlines
Mon 5/205:45 amMIA - STL
3 stops28h 54mSpirit Airlines
Deal found 5/1$227
Sun 5/266:19 pmSTL - MIA
2 stops27h 32mSpirit Airlines
Wed 5/297:06 pmMIA - STL
2 stops23h 23mSpirit Airlines
Deal found 5/2$229

Cheap St. Louis to Key Largo flights in May & June 2024

Find cheap flight options from St. Louis to Key Largo specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,899,487 searches. Prices were last updated on May 3, 2024.
The lowest fares we've come across on flights traveling from St. Louis to Key Largo in May and June 2024. For more flight deals, be sure to check back very soon.
Thu 5/1611:06 pmSTL - MIA
1 stop29h 54mFrontier
Tue 5/217:40 amMIA - STL
1 stop26h 56mFrontier
Deal found 5/2$148
Mon 5/208:04 pmSTL - MIA
1 stop8h 56mFrontier
Thu 5/231:40 pmMIA - STL
1 stop9h 26mFrontier
Deal found 5/2$150
Sat 6/88:02 pmSTL - MIA
1 stop8h 51mFrontier
Sat 6/155:15 amMIA - STL
1 stop10h 03mFrontier
Deal found 5/2$156
Sat 5/1111:39 amSTL - MIA
2 stops13h 01mSpirit Airlines
Tue 5/1410:11 amMIA - STL
2 stops25h 35mSpirit Airlines
Deal found 5/2$163
Sat 6/158:02 pmSTL - MIA
1 stop27h 58mFrontier
Sat 6/225:15 amMIA - STL
1 stop10h 03mFrontier
Deal found 5/2$169
Fri 5/178:45 pmSTL - MIA
1 stop26h 47mFrontier
Mon 5/207:35 amMIA - STL
1 stop30h 34mFrontier
Deal found 5/1$178
Sat 5/188:04 pmSTL - MIA
1 stop8h 56mFrontier
Mon 5/202:47 pmMIA - STL
1 stop23h 22mFrontier
Deal found 5/2$189
Thu 5/1611:06 pmSTL - MIA
1 stop24h 26mFrontier
Mon 5/207:35 amMIA - STL
1 stop30h 34mFrontier
Deal found 5/2$193
Sat 6/158:02 pmSTL - MIA
1 stop27h 58mFrontier
Tue 6/187:30 amMIA - STL
1 stop26h 59mFrontier
Deal found 5/2$197

St. Louis to Key Largo 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Key Largo in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 3, 2024.
The lowest fares we've come across on flights traveling from St. Louis to Key Largo in May and June 2024. For more flight deals, be sure to check back very soon.
Thu 5/1611:06 pmSTL - MIA
1 stop29h 54mFrontier
Tue 5/217:40 amMIA - STL
1 stop26h 56mFrontier
Deal found 5/2$148
Mon 5/208:04 pmSTL - MIA
1 stop8h 56mFrontier
Thu 5/231:40 pmMIA - STL
1 stop9h 26mFrontier
Deal found 5/2$150
Sat 6/88:02 pmSTL - MIA
1 stop8h 51mFrontier
Sat 6/155:15 amMIA - STL
1 stop10h 03mFrontier
Deal found 5/2$156
Sat 5/1111:39 amSTL - MIA
2 stops13h 01mSpirit Airlines
Tue 5/1410:11 amMIA - STL
2 stops25h 35mSpirit Airlines
Deal found 5/2$163
Sat 6/158:02 pmSTL - MIA
1 stop27h 58mFrontier
Sat 6/225:15 amMIA - STL
1 stop10h 03mFrontier
Deal found 5/2$169
Mon 8/268:00 pmSTL - MIA
1 stop27h 41mFrontier
Tue 9/33:21 pmMIA - STL
1 stop19h 16mFrontier
Deal found 5/2$174
Fri 5/178:45 pmSTL - MIA
1 stop26h 47mFrontier
Mon 5/207:35 amMIA - STL
1 stop30h 34mFrontier
Deal found 5/1$178
Sat 5/188:04 pmSTL - MIA
1 stop8h 56mFrontier
Mon 5/202:47 pmMIA - STL
1 stop23h 22mFrontier
Deal found 5/2$189
Fri 9/208:00 pmSTL - MIA
1 stop27h 41mFrontier
Mon 9/235:16 amMIA - STL
1 stop9h 06mFrontier
Deal found 5/2$192

Non-stop flights to Key Largo from St. Louis

Discover non-stop flight options from St. Louis to Key Largo. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 3, 2024.
For a quicker trip, book one of these direct flights from St. Louis to Key Largo. Search for alternative flights from St. Louis to Key Largo by utilizing the search form above.
Wed 8/215:15 amSTL - MIA
Nonstop2h 48mAmerican Airlines
Wed 9/49:00 pmMIA - STL
Nonstop3h 00mAmerican Airlines
Deal found 5/2$234
Sat 9/215:31 amSTL - MIA
Nonstop2h 49mAmerican Airlines
Sat 9/289:00 pmMIA - STL
Nonstop3h 00mAmerican Airlines
Deal found 5/2$259
Tue 6/185:00 amSTL - MIA
Nonstop2h 50mAmerican Airlines
Thu 6/209:22 pmMIA - STL
Nonstop3h 04mAmerican Airlines
Deal found 5/2$264
Sat 9/215:31 amSTL - MIA
Nonstop2h 49mAmerican Airlines
Thu 9/269:00 pmMIA - STL
Nonstop3h 00mAmerican Airlines
Deal found 5/1$279
Fri 8/95:15 amSTL - MIA
Nonstop2h 48mAmerican Airlines
Tue 8/209:16 pmMIA - STL
Nonstop3h 00mAmerican Airlines
Deal found 5/2$281
Tue 10/225:31 amSTL - MIA
Nonstop2h 49mAmerican Airlines
Sat 10/269:00 pmMIA - STL
Nonstop3h 00mAmerican Airlines
Deal found 5/2$283
Sat 6/295:00 amSTL - MIA
Nonstop2h 50mAmerican Airlines
Mon 7/19:22 pmMIA - STL
Nonstop3h 04mAmerican Airlines
Deal found 5/2$284
Wed 8/285:15 amSTL - MIA
Nonstop2h 48mAmerican Airlines
Sun 9/19:16 pmMIA - STL
Nonstop3h 00mAmerican Airlines
Deal found 5/2$289
Mon 8/55:29 amSTL - MIA
Nonstop2h 51mAmerican Airlines
Thu 8/89:16 pmMIA - STL
Nonstop3h 00mAmerican Airlines
Deal found 5/1$299

St. Louis to Key Largo flights leaving soon

Find last-minute flight options from St. Louis to Key Largo for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 3, 2024.
Check out these flights departing soon from St. Louis to Key Largo. Users should examine the flight details to ensure there are no surprises.
Sat 5/1111:39 amSTL - MIA
2 stops13h 01mSpirit Airlines
Tue 5/1410:11 amMIA - STL
2 stops25h 35mSpirit Airlines
Deal found 5/2$163
Sat 5/115:15 pmSTL - MIA
3 stops27h 30mSpirit Airlines
Tue 5/1410:11 amMIA - STL
2 stops25h 35mSpirit Airlines
Deal found 5/2$214
Sat 5/1111:39 amSTL - MIA
2 stops13h 01mSpirit Airlines
Tue 5/145:10 pmMIA - STL
1 stop18h 36mSpirit Airlines
Deal found 5/2$275
Sat 5/118:04 pmSTL - MIA
1 stop8h 59mFrontier
Tue 5/149:45 pmMIA - STL
1 stop13h 02mFrontier
Deal found 5/2$298
Thu 5/97:30 amSTL - MIA
2 stops7h 04mMultiple Airlines
Mon 5/133:10 pmMIA - STL
2 stops19h 29mMultiple Airlines
Deal found 5/2$333
Sat 5/115:15 pmSTL - MIA
3 stops27h 30mMultiple Airlines
Tue 5/1410:11 amMIA - STL
3 stops21h 54mMultiple Airlines
Deal found 5/2$336
Tue 5/74:50 pmSTL - MIA
1 stop12h 13mFrontier
Wed 5/810:14 pmMIA - STL
1 stop13h 24mFrontier
Deal found 5/1$338
Thu 5/97:30 amSTL - MIA
2 stops7h 04mMultiple Airlines
Mon 5/135:45 amMIA - STL
3 stops28h 54mMultiple Airlines
Deal found 5/2$388
Thu 5/911:38 amSTL - MIA
1 stop17h 22mFrontier
Mon 5/1310:15 pmMIA - STL
1 stop18h 35mFrontier
Deal found 5/2$548

One-way flights to Key Largo from St. Louis

Search for one-way flight options from St. Louis to Key Largo. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 3, 2024.
Take a look at some of the best available options we've come across on one-way flights from St. Louis to Key Largo. Users needing a return flight from St. Louis to Key Largo should utilize the search form above.
Wed 5/158:04 pmSTL - MIA
1 stop8h 56mFrontier
Deal found 5/1$75
Mon 5/134:05 pmSTL - MIA
2 stops22h 41mSpirit Airlines
Deal found 5/2$78
Tue 5/144:50 pmSTL - MIA
1 stop12h 13mFrontier
Deal found 5/1$81
Thu 5/1611:06 pmSTL - MIA
1 stop24h 26mFrontier
Deal found 5/2$85
Thu 5/1611:06 pmSTL - MIA
1 stop24h 26mFrontier
Deal found 5/1$86
Sat 5/118:04 pmSTL - MIA
1 stop8h 59mFrontier
Deal found 5/1$89
Wed 6/198:02 pmSTL - MIA
1 stop8h 38mFrontier
Deal found 5/1$90
Thu 6/203:32 pmSTL - MIA
1 stop8h 28mFrontier
Deal found 5/1$93
Mon 5/138:04 pmSTL - MIA
1 stop8h 59mFrontier
Deal found 5/2$94

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 2,899,487 searches. Data last updated May 3, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$150 - $259

Route

Depart

Return

Price

Lambert-St LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 5/14

1 stop12h 13m

Miami

Thu 5/23

1 stop9h 26m

$150

Lambert-St LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 6/8

1 stop8h 51m

Miami

Sat 6/15

1 stop10h 03m

$156

Lambert-St LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Thu 5/16

1 stop29h 54m

Miami

Mon 5/20

1 stop30h 34m

$163

Lambert-St LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Mon 5/13

1 stop8h 59m

Miami

Thu 5/23

1 stop9h 26m

$164

Lambert-St LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 5/22

2 stops12h 17m

Miami

Wed 5/29

2 stops37h 04m

$191

Lambert-St LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Fri 5/17

2 stops32h 35m

Miami

Mon 5/20

3 stops28h 54m

$197

Lambert-St LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Mon 5/13

2 stops27h 52m

Miami

Wed 5/15

3 stops33h 55m

$200

Lambert-St LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Fri 6/7

1 stop6h 36m

Miami

Tue 6/11

1 stop7h 32m

$248

Lambert-St LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 9/21

Nonstop2h 49m

Miami

Sat 9/28

Nonstop3h 00m

$259

Flights are sorted by cheapest first

Deals found on 4/30

When is the best time to 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 January 28, 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 83 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.
Search Deals

When is the cheapest time 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 April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
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.
Search Deals

Average price of flights to Key Largo by month

Plan your trip from St. Louis to Key Largo by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Key Largo is currently $86 while a round-trip flight costs $192. Price data was last updated on April 28, 2024.

Currently, September is the cheapest month in which you can book a flight from St. Louis to Key Largo (average of $209). Flying from St. Louis to Key Largo in March is currently the most expensive (average of $290). 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.

January

$221

February

$235

March

$290

April

$266

May

$254

June

$269

July

$286

August

$241

September

$209

October

$231

November

$258

December

$258

Temperature and rainfall in Key Largo by month

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

MIA

Temperature

68 - 84.2 °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 May 3, 2024.
Peruse reviews from past customers who have flown with Frontier, Spirit 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.
Delta
8.1
Very good
10,858 reviews
Check prices

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

Delta
8.1
Very good
10,858 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

United Airlines
7.4
Good
11,143 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

American Airlines
7.3
Good
14,767 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

Spirit Airlines
6.4
Okay
8,737 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

Frontier
6.3
Okay
4,100 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

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 6 outbound flights to Key Largo per day. 7 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 $150, but on average you can expect to pay $182.

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

    Cheapflights has at least 20 direct flights from St. Louis to Key Largo under $300. A good price for a nonstop flight from St. Louis to Key Largo is less than $302.

  • Are there last-minute flights available from St. Louis to Key Largo for under $200?

    There are currently 19+ open flights from St. Louis to Key Largo within the next 7 days for less than $200.

  • What days are nonstop flights available from St. Louis to Key Largo?

    Nonstop flights are available for this route on the following days: Monday, Wednesday, Friday.

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

    The Lambert-St Louis to Key Largo flight path was viewed by 2 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How many flights depart from St. Louis to Key Largo on average per day?

    3 flight departures from St. Louis to Key Largo per day on average.
    Early Morning (Midnight to 6am) - 67% of flight departures
    Afternoon (Noon - 6pm) - 33% of flight departures

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

    For as low as $150, Frontier can have you in Key Largo from St. Louis in 12h 13m. The distance between St. Louis and Key Largo is about 1075 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $75. Users have also found prices from $78 and $128 on Spirit Airlines and American Airlines, respectively.

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

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

  • 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 Southwest (72%), American Airlines (71%) and Qatar Airways (57%).

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

    On average you can expect to pay $1,102 for a flight from St. Louis to Key Largo. The cheapest flight overall is $146 while the most popular route, (Lambert-St Louis - Miami) is currently priced at $192.

  • 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).

  • 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 5/2.

See more FAQs

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Alternative routes for St. Louis to Key Largo
See prices for flight routes from nearby airports that may be better suited for you.

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Top 7 airlines flying from St. Louis to Key Largo

Discover the top 7 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 2,899,487 searches. Data last updated May 3, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$70Average$178FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$159Average$205FlexibilityNo cancel feeOn-time62%
Search Frontier flights
American AirlinesCheapest$226Average$406FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Sun Country AirCheapest$254Average$607FlexibilityNo cancel feeOn-time83%
Search Sun Country Air flights
DeltaCheapest$271Average$429FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$300Average$549FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
JetBlueCheapest$336Average$419FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
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Search flights from St. Louis to Key Largo by cabin class

Find flights from St. Louis to Key Largo, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from St. Louis to Key Largo

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 May 3, 2024.
33%of flight departuresEarly morningMidnight to 6 am
32%of flight departuresMorning6 am to noon
35%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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 May 3, 2024.
Sunday6daily flights
Monday7daily flights
Tuesday7daily flights
Wednesday7daily flights
Thursday7daily flights
Friday7daily flights
Saturday6daily flights

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Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis to Key Largo for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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Yes, we can. To see specific flights from St. Louis to Key Largo with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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