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Cheap flights from St. Louis to Key West from $97

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Key West

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:29 pm - 9:24 amSTL  Lambert-St Louis-EYW Key West
41h 55m2 stops Atlanta Hartsfield-Jackson Tampa
Multiple Airlines Logo
10:59 am - 4:34 pmEYW  Key West-STL Lambert-St Louis
6h 35m1 stop Orlando
$261Multiple Airlines
Mon, Sep 14 - Fri, Sep 18
Multiple Airlines Logo
6:39 pm - 7:44 amSTL  Lambert-St Louis-EYW Key West
12h 05m1 stop Orlando
Multiple Airlines Logo
10:59 am - 1:10 pmEYW  Key West-STL Lambert-St Louis
27h 11m2 stops Orlando Atlanta Hartsfield-Jackson
$268Multiple Airlines
Thu, Oct 1 - Sun, Oct 4
Multiple Airlines Logo
6:39 pm - 10:19 amSTL  Lambert-St Louis-EYW Key West
14h 40m1 stop Orlando
Multiple Airlines Logo
1:16 pm - 1:10 pmEYW  Key West-STL Lambert-St Louis
24h 54m2 stops Tampa Atlanta Hartsfield-Jackson
$271Multiple Airlines
Thu, Oct 1 - Tue, Oct 6
American Airlines Logo
8:10 am - 3:06 pmSTL  Lambert-St Louis-EYW Key West
5h 56m1 stop Charlotte Douglas
American Airlines Logo
11:14 am - 3:48 pmEYW  Key West-STL Lambert-St Louis
5h 34m1 stop Miami
$303American Airlines
Wed, Dec 9 - Tue, Dec 15
American Airlines Logo
5:00 am - 10:55 amSTL  Lambert-St Louis-EYW Key West
4h 55m1 stop Miami
American Airlines Logo
10:18 am - 3:48 pmEYW  Key West-STL Lambert-St Louis
6h 30m1 stop Miami
$303American Airlines
Tue, Dec 1 - Wed, Dec 9
Delta Logo
2:25 pm - 8:01 pmSTL  Lambert-St Louis-EYW Key West
4h 36m1 stop Atlanta Hartsfield-Jackson
Delta Logo
2:06 pm - 6:13 pmEYW  Key West-STL Lambert-St Louis
5h 07m1 stop Atlanta Hartsfield-Jackson
$303Delta
Wed, Oct 21 - Wed, Nov 18
Delta Logo
2:31 pm - 8:00 pmSTL  Lambert-St Louis-EYW Key West
4h 29m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:05 pm - 11:56 pmEYW  Key West-STL Lambert-St Louis
6h 51m1 stop Atlanta Hartsfield-Jackson
$303Delta
Tue, Nov 10 - Tue, Nov 17
United Airlines Logo
6:09 am - 1:54 pmSTL  Lambert-St Louis-EYW Key West
6h 45m1 stop Newark
United Airlines Logo
4:10 pm - 9:35 pmEYW  Key West-STL Lambert-St Louis
6h 25m1 stop Chicago O'Hare Intl
$303United Airlines
Wed, Oct 28 - Wed, Nov 4
United Airlines Logo
6:00 am - 4:22 pmSTL  Lambert-St Louis-EYW Key West
9h 22m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl
United Airlines Logo
4:05 pm - 9:13 pmEYW  Key West-STL Lambert-St Louis
6h 08m1 stop Chicago O'Hare Intl
$308United Airlines
Sat, Jan 23 - Wed, Jan 27
United Airlines Logo
6:00 am - 3:06 pmSTL  Lambert-St Louis-EYW Key West
8h 06m1 stop Chicago O'Hare Intl
United Airlines Logo
4:05 pm - 9:13 pmEYW  Key West-STL Lambert-St Louis
6h 08m1 stop Chicago O'Hare Intl
$329United Airlines
Mon, Feb 1 - Thu, Feb 11

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American Airlines flights from St. Louis to Key West

Our best American Airlines deals on St. Louis to Key West flight tickets
American Airlines
Dec 1
STL5:00 amLambert-St Louis
4h 55m
1 stop
EYW10:55 amKey West
Dec 9
EYW10:18 amKey West
6h 30m
1 stop
STL3:48 pmLambert-St Louis
$303
American Airlines
Oct 14
STL8:48 amLambert-St Louis
7h 06m
1 stop
EYW4:54 pmKey West
Oct 21
EYW1:43 pmKey West
5h 06m
1 stop
STL5:49 pmLambert-St Louis
$353
American Airlines
Dec 1
STL7:26 amLambert-St Louis
7h 57m
2 stops
EYW4:23 pmKey West
Dec 5
EYW11:14 amKey West
7h 11m
1 stop
STL5:25 pmLambert-St Louis
$384

United Airlines flights from St. Louis to Key West

Our best United Airlines deals on St. Louis to Key West flight tickets
United Airlines
Jan 23
STL6:00 amLambert-St Louis
9h 22m
2 stops
EYW4:22 pmKey West
Jan 27
EYW2:30 pmKey West
9h 39m
2 stops
STL11:09 pmLambert-St Louis
$333
United Airlines
Jan 9
STL8:25 amLambert-St Louis
6h 57m
1 stop
EYW4:22 pmKey West
Jan 15
EYW4:05 pmKey West
6h 08m
1 stop
STL9:13 pmLambert-St Louis
$406
United Airlines
Jan 8
STL8:25 amLambert-St Louis
6h 57m
1 stop
EYW4:22 pmKey West
Jan 15
EYW4:05 pmKey West
8h 04m
1 stop
STL11:09 pmLambert-St Louis
$419

momondo Fare Finder

 
Use the filters below to find and compare flights from St. Louis to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Mon 9/14

2:29 pm-9:24 am

2 stops41h 55m

Key West

Fri 9/18

10:59 am-4:34 pm

1 stop6h 35m

$261

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Thu 10/1

6:39 pm-7:44 am

1 stop12h 05m

Key West

Sun 10/4

10:59 am-1:10 pm

2 stops27h 11m

$268

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Thu 10/1

6:39 pm-10:19 am

1 stop14h 40m

Key West

Tue 10/6

1:16 pm-1:10 pm

2 stops24h 54m

$271

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Wed 12/9

8:10 am-3:06 pm

1 stop5h 56m

Key West

Tue 12/15

11:14 am-3:48 pm

1 stop5h 34m

$303

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Tue 12/1

5:00 am-10:55 am

1 stop4h 55m

Key West

Wed 12/9

10:18 am-3:48 pm

1 stop6h 30m

$303
Quickest round-trip

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Wed 10/21

2:25 pm-8:01 pm

1 stop4h 36m

Key West

Wed 11/18

2:06 pm-6:13 pm

1 stop5h 07m

$303

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Tue 11/10

2:31 pm-8:00 pm

1 stop4h 29m

Key West

Tue 11/17

6:05 pm-11:56 pm

1 stop6h 51m

$303

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Wed 10/28

6:09 am-1:54 pm

1 stop6h 45m

Key West

Wed 11/4

4:10 pm-9:35 pm

1 stop6h 25m

$303

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Sat 1/23

6:00 am-4:22 pm

2 stops9h 22m

Key West

Wed 1/27

4:05 pm-9:13 pm

1 stop6h 08m

$308

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Mon 2/1

6:00 am-3:06 pm

1 stop8h 06m

Key West

Thu 2/11

4:05 pm-9:13 pm

1 stop6h 08m

$329

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Key West from

How to get the cheapest flight ticket from St. Louis to Key West

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Key West?

Prices are currently low for flights on this route.

Typical prices usually range from $426 to $590.
The lowest price recently found on this route was $261.

What is the cheapest month to fly to Key West?

In general, January is the cheapest month to fly from St. Louis to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $316. If you are unable to visit Key West during the month of January, then departing from St. Louis during the month December is also very affordable. Most momondo users find prices during this month for around $345.

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

You are more likely to see cheaper flights to Key West from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Key West for around $469 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Key West from St. Louis for as low as $330 on momondo.

When to book flights from St. Louis to Key West

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Key West according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Key West (STL to EYW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Key West

Best Price Found

$97

Fastest flight time

4h 29m

Direct flights

None
The best one-way flight to Key West from St. Louis in the past 72 hours is $97. The best round-trip flight deal from St. Louis to Key West found on momondo in the last 72 hours is $261.
The fastest flight from St. Louis to Key West takes 4h 29m
There are no direct flights from St. Louis to Key West. There are no popular flight routes from St. Louis to Key West.
Search flight deals

Frequently asked questions about flying from St. Louis to Key West

  • How far is Lambert-St Louis to Key West by plane?

    A flight from Lambert-St Louis to Key West will travel around 1088.7 mi. 4h 29m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Key West Airport?

    Prices for flights from Lambert-St Louis Airport to Key West Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Key West Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Key West Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Key West Airport.

  • What documentation or ID do you need to fly to Key West Airport?

    The necessary travel and health documents for your Key West Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Key West?

Best airlines flying from St. Louis to Key West

Compare and see reviews for airlines that fly from St. Louis to Key West with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $222Free CancellationRating
7.1
11,993 reviews
Search American Airlines flights
DeltaPriceFrom $242Free CancellationRating
7.8
8,530 reviews
Search Delta flights
United AirlinesPriceFrom $292Free CancellationRating
7.4
10,121 reviews
Search United Airlines flights

Traveling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Big Pine Key
Little Torch Key

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Key West?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Key West for you.

Can I find flights from St. Louis to Key West with flexible booking policies on momondo?

Flights from St. Louis to Key West with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Key West?

Once you have performed a search for St. Louis to Key West flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Key West right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Key West flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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