Cheap flights from St. Louis to Key West (STL - EYW) from $229

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 6/6. 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 — EYW
Mar 23 — Mar 301

The best prices from Lambert-St Louis to Key West are usually found in January or August, booked 63 days in advance, depart on a Friday or Tuesday and return on a Wednesday

Cheap flight deals from St. Louis to Key West

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Key West (EYW). 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 March 19, 2024.

Popular in

March

Cheapest in

January

Round-trip from

$374

One-way from

$229
High demand for flights, 17% potential price rise
Best time to find cheap flights, 13% potential price drop
From Lambert-St Louis to Key West
One-way flight from Lambert-St Louis to Key West

What is the cheapest day to fly round-trip from St. Louis to Key West?

Flying to your destination on a Saturday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Key West. Check prices with Cheapflights to find a great deal for your trip.

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

To save up to 85% on this flight, we recommend booking at least 25 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St. Louis to Key West from $620 1-2 weeks out and tickets from $677 for flights departing within the next 72 hours.

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

The best pricing can be found in the month of January. Prices to Key West from St. Louis average $527. You can even find prices in January for less than $527, as users have found deals to Key West from as low as $334. The month of March appears to be one of the more expensive times to travel to Key West from St. Louis. Flying in the targeted month can save you up to 20%.

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

One of the essential ways to save on airfare from St. Louis to Key West is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 15% on airfare.

Cheap Delta flights from St. Louis to Key West

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Key West. 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 3,145,932 searches. Data last updated March 19, 2024.
Peruse some of the lowest-priced Delta flights we've found from St. Louis to Key West. Deals update often to give you more flight options matching your criteria
Tue 4/236:00 amSTL - EYW
1 stop7h 15mDelta
Wed 4/246:10 pmEYW - STL
1 stop4h 50mDelta
Deal found 3/17$238
Thu 8/222:05 pmSTL - EYW
1 stop4h 31mDelta
Tue 8/276:05 pmEYW - STL
1 stop6h 34mDelta
Deal found 3/18$273
Thu 8/12:05 pmSTL - EYW
1 stop4h 31mDelta
Mon 8/56:05 pmEYW - STL
1 stop6h 34mDelta
Deal found 3/17$368
Wed 4/176:00 amSTL - EYW
1 stop7h 15mDelta
Sun 4/217:45 amEYW - STL
1 stop5h 11mDelta
Deal found 3/17$1,178

Cheap American Airlines flights from St. Louis to Key West

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Key West. 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 3,145,932 searches. Data last updated March 19, 2024.
Take a gander at the lowest prices we've found on American Airlines flights from St. Louis to Key West. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Fri 5/31:11 pmSTL - EYW
1 stop5h 10mAmerican Airlines
Tue 5/74:58 pmEYW - STL
1 stop7h 01mAmerican Airlines
Deal found 3/17$246
Sat 9/75:37 amSTL - EYW
1 stop4h 39mAmerican Airlines
Wed 9/115:23 pmEYW - STL
1 stop6h 57mAmerican Airlines
Deal found 3/17$255
Mon 5/67:30 amSTL - EYW
1 stop7h 38mAmerican Airlines
Mon 5/134:58 pmEYW - STL
1 stop7h 01mAmerican Airlines
Deal found 3/17$256
Sat 9/75:37 amSTL - EYW
1 stop4h 39mAmerican Airlines
Wed 9/112:01 pmEYW - STL
2 stops8h 06mAmerican Airlines
Deal found 3/17$260
Mon 5/65:04 amSTL - EYW
2 stops9h 14mAmerican Airlines
Mon 5/134:58 pmEYW - STL
1 stop7h 01mAmerican Airlines
Deal found 3/17$261
Sat 9/147:37 amSTL - EYW
2 stops7h 50mAmerican Airlines
Tue 9/1711:43 amEYW - STL
2 stops8h 06mAmerican Airlines
Deal found 3/16$265
Wed 5/226:40 amSTL - EYW
2 stops8h 28mAmerican Airlines
Fri 5/314:58 pmEYW - STL
1 stop7h 01mAmerican Airlines
Deal found 3/17$268
Fri 4/57:10 amSTL - EYW
1 stop7h 55mAmerican Airlines
Fri 4/121:03 pmEYW - STL
1 stop5h 59mAmerican Airlines
Deal found 3/17$270
Thu 4/41:11 pmSTL - EYW
1 stop5h 10mAmerican Airlines
Mon 4/85:14 pmEYW - STL
1 stop6h 46mAmerican Airlines
Deal found 3/18$271

Cheap St. Louis to Key West flights in March & April 2024

Find cheap flight options from St. Louis to Key West specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Prices were last updated on March 19, 2024.
These are some of the most attractive deals on flights from St. Louis to Key West in 2024. More deals are always being added, so be sure to check back regularly.
Mon 4/156:31 amSTL - EYW
1 stop9h 53mUnited Airlines
Sat 4/204:58 pmEYW - STL
1 stop6h 16mUnited Airlines
Deal found 3/17$258
Fri 4/57:10 amSTL - EYW
1 stop7h 55mAmerican Airlines
Fri 4/121:03 pmEYW - STL
1 stop5h 59mAmerican Airlines
Deal found 3/17$270
Fri 4/55:15 amSTL - EYW
1 stop5h 54mAmerican Airlines
Fri 4/123:35 pmEYW - STL
2 stops8h 07mAmerican Airlines
Deal found 3/17$275
Fri 4/56:20 amSTL - EYW
2 stops7h 41mAmerican Airlines
Fri 4/121:03 pmEYW - STL
2 stops8h 26mAmerican Airlines
Deal found 3/17$281
Thu 3/289:17 amSTL - EYW
1 stop7h 16mAmerican Airlines
Tue 4/23:04 pmEYW - STL
1 stop5h 16mAmerican Airlines
Deal found 3/17$325
Sat 3/305:12 amSTL - EYW
1 stop6h 23mAmerican Airlines
Thu 4/46:01 pmEYW - STL
1 stop5h 41mAmerican Airlines
Deal found 3/17$326
Thu 3/289:17 amSTL - EYW
1 stop5h 45mAmerican Airlines
Tue 4/23:04 pmEYW - STL
2 stops8h 54mAmerican Airlines
Deal found 3/17$330
Thu 3/286:19 amSTL - EYW
2 stops8h 43mAmerican Airlines
Tue 4/24:42 pmEYW - STL
1 stop5h 56mAmerican Airlines
Deal found 3/18$331
Wed 3/209:17 amSTL - EYW
1 stop7h 16mAmerican Airlines
Wed 4/34:42 pmEYW - STL
1 stop5h 56mAmerican Airlines
Deal found 3/17$335

St. Louis to Key West 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Key West in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
These are some of the most attractive deals on flights from St. Louis to Key West in 2024. More deals are always being added, so be sure to check back regularly.
Fri 5/31:11 pmSTL - EYW
1 stop5h 10mAmerican Airlines
Tue 5/74:58 pmEYW - STL
1 stop7h 01mAmerican Airlines
Deal found 3/17$246
Sat 9/75:37 amSTL - EYW
1 stop4h 39mAmerican Airlines
Wed 9/115:23 pmEYW - STL
1 stop6h 57mAmerican Airlines
Deal found 3/17$255
Mon 5/67:30 amSTL - EYW
1 stop7h 38mAmerican Airlines
Mon 5/134:58 pmEYW - STL
1 stop7h 01mAmerican Airlines
Deal found 3/17$256
Mon 4/156:31 amSTL - EYW
1 stop9h 53mUnited Airlines
Sat 4/204:58 pmEYW - STL
1 stop6h 16mUnited Airlines
Deal found 3/17$258
Sat 9/75:37 amSTL - EYW
1 stop4h 39mAmerican Airlines
Wed 9/112:01 pmEYW - STL
2 stops8h 06mAmerican Airlines
Deal found 3/17$260
Mon 5/65:04 amSTL - EYW
2 stops9h 14mAmerican Airlines
Mon 5/134:58 pmEYW - STL
1 stop7h 01mAmerican Airlines
Deal found 3/17$261
Sat 9/147:37 amSTL - EYW
2 stops7h 50mAmerican Airlines
Tue 9/1711:43 amEYW - STL
2 stops8h 06mAmerican Airlines
Deal found 3/16$265
Wed 5/226:40 amSTL - EYW
2 stops8h 28mAmerican Airlines
Fri 5/314:58 pmEYW - STL
1 stop7h 01mAmerican Airlines
Deal found 3/17$268
Fri 4/57:10 amSTL - EYW
1 stop7h 55mAmerican Airlines
Fri 4/121:03 pmEYW - STL
1 stop5h 59mAmerican Airlines
Deal found 3/17$270

St. Louis to Key West flights leaving soon

Find last-minute flight options from St. Louis to Key West 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 3,145,932 searches. Data last updated March 19, 2024.
Check out these flights departing soon from St. Louis to Key West. Tip: verify your flight details before completing your reservation.
Thu 3/289:17 amSTL - EYW
1 stop7h 16mAmerican Airlines
Tue 4/23:04 pmEYW - STL
1 stop5h 16mAmerican Airlines
Deal found 3/17$325
Sat 3/305:12 amSTL - EYW
1 stop6h 23mAmerican Airlines
Thu 4/46:01 pmEYW - STL
1 stop5h 41mAmerican Airlines
Deal found 3/17$326
Thu 3/289:17 amSTL - EYW
1 stop5h 45mAmerican Airlines
Tue 4/23:04 pmEYW - STL
2 stops8h 54mAmerican Airlines
Deal found 3/17$330
Thu 3/286:19 amSTL - EYW
2 stops8h 43mAmerican Airlines
Tue 4/24:42 pmEYW - STL
1 stop5h 56mAmerican Airlines
Deal found 3/18$331
Wed 3/209:17 amSTL - EYW
1 stop7h 16mAmerican Airlines
Wed 4/34:42 pmEYW - STL
1 stop5h 56mAmerican Airlines
Deal found 3/17$335
Thu 3/286:19 amSTL - EYW
2 stops7h 52mAmerican Airlines
Tue 4/23:04 pmEYW - STL
2 stops8h 54mAmerican Airlines
Deal found 3/17$336
Wed 3/209:17 amSTL - EYW
1 stop5h 45mAmerican Airlines
Wed 4/37:55 amEYW - STL
2 stops9h 34mAmerican Airlines
Deal found 3/17$340
Wed 3/205:15 amSTL - EYW
2 stops8h 56mAmerican Airlines
Wed 4/37:55 amEYW - STL
2 stops9h 34mAmerican Airlines
Deal found 3/17$345
Sat 3/3010:07 amSTL - EYW
2 stops7h 37mAmerican Airlines
Thu 4/46:50 amEYW - STL
2 stops8h 45mAmerican Airlines
Deal found 3/17$421

One-way flights to Key West from St. Louis

Search for one-way flight options from St. Louis to Key West. 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 3,145,932 searches. Data last updated March 19, 2024.
Take a look at some of the best available options we've come across on one-way flights from St. Louis to Key West. Users needing a return flight from St. Louis to Key West should utilize the search form above.
Thu 6/67:00 amSTL - EYW
1 stop8h 22mAmerican Airlines
Deal found 3/17$229
Thu 6/66:00 amSTL - EYW
2 stops9h 31mAmerican Airlines
Deal found 3/17$264
Thu 6/67:30 amSTL - EYW
3 stops24h 32mMultiple Airlines
Deal found 3/17$286

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

Customize your flight search to find flights from St. Louis to Key West 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 3,145,932 searches. Data last updated March 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$238 - $316

Route

Depart

Return

Price

Lambert-St LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Tue 4/23

1 stop7h 15m

Key West

Wed 4/24

1 stop4h 50m

$238

Lambert-St LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Fri 5/3

1 stop5h 10m

Key West

Tue 5/7

1 stop7h 01m

$246

Lambert-St LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Sat 9/7

1 stop4h 39m

Key West

Wed 9/11

1 stop6h 57m

$255

Lambert-St LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Mon 5/6

1 stop7h 38m

Key West

Mon 5/13

1 stop7h 01m

$256

Lambert-St LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Mon 4/15

1 stop9h 53m

Key West

Sat 4/20

1 stop6h 16m

$258

Lambert-St LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Sat 9/7

1 stop4h 39m

Key West

Wed 9/11

2 stops8h 06m

$260

Lambert-St LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Thu 8/22

1 stop4h 31m

Key West

Tue 8/27

1 stop6h 34m

$273

Lambert-St LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Tue 4/23

1 stop26h 51m

Key West

Sat 4/27

1 stop7h 09m

$303

Lambert-St LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Tue 4/23

2 stops18h 09m

Key West

Sat 4/27

1 stop7h 09m

$316

Flights are sorted by cheapest first

Deals found on 3/17

When is the best time to book a flight from St. Louis to Key West?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Key West. Price data was last updated on January 28, 2024.
Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Key West. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

When is the cheapest time to fly from St. Louis to Key West?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Key West. Price data was last updated on March 17, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Key West flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday 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 West by month

Plan your trip from St. Louis to Key West by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Key West is currently $260 while a round-trip flight costs $267. Price data was last updated on March 10, 2024.

Currently, January is the cheapest month in which you can book a flight from St. Louis to Key West (average of $374). Flying from St. Louis to Key West in March is currently the most expensive (average of $506). 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

$374

February

$415

March

$506

April

$503

May

$476

June

$498

July

$478

August

$395

September

$427

October

$475

November

$448

December

$400

Temperature and rainfall in Key West by month

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

EYW

Temperature

69.8 - 84.2 °F

Reviews of airlines servicing Key West

Get insights into the airlines that provide service to Key West. 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 West. Reviews last updated March 19, 2024.
See what other customers who have flown with Delta, American Airlines and United Airlines from St. Louis to Key West have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
11,551 reviews

Boarding

8.2

Food

7.5

Entertainment

8.1

Overall

8.1

Crew

8.6

Comfort

7.9

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.

8.1
Very good
11,551 reviews
8.1
Very good
11,551 reviews

Boarding

8.2

Food

7.5

Entertainment

8.1

Overall

8.1

Crew

8.6

Comfort

7.9

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.

7.4
Good
11,602 reviews
8.1
Very good
11,551 reviews

Boarding

8.2

Food

7.5

Entertainment

8.1

Overall

8.1

Crew

8.6

Comfort

7.9

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.

7.3
Good
15,312 reviews
8.1
Very good
11,551 reviews

Boarding

8.2

Food

7.5

Entertainment

8.1

Overall

8.1

Crew

8.6

Comfort

7.9

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 West. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • Can I find flights from St. Louis to Key West for under $300 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Key West for under $300. The cheapest flight booked recently is on Delta for just $238, but on average you can expect to pay $274.

  • Are there last-minute flights available from St. Louis to Key West for under $400?

    There are currently 20+ open flights from St. Louis to Key West within the next 7 days for less than $400.

  • What are the cheapest airlines flying from St. Louis to Key West round-trip?

    Our cheapest airline available from St. Louis to Key West is Delta. Our recent data shows that you can find tickets from as low as $238 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $246 and $258 round-trip. Users have found that Delta is 54% cheaper than the other options available to this destination.

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

  • What does STL to EYW mean?

    Lambert-St Louis Airport is STL and Key West Airport is EYW. 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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

Top 3 airlines flying from St. Louis to Key West

Discover the top 3 airlines that operate flights from St. Louis to Key West. 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 3,145,932 searches. Data last updated March 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$226Average$475FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$287Average$508FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$295Average$505FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Search flights from St. Louis to Key West by cabin class

Find flights from St. Louis to Key West, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Key West?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from St. Louis to Key West. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Key West?

Cheapflights simply makes it quick and affordable to book flights from St. Louis to Key West by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from St. Louis to Key West with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from St. Louis to Key West, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from St. Louis to Key West become cheaper?

Yes, Cheapflights offers price alerts on St. Louis to Key West flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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