Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from South Dakota to Key West from $136

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from South Dakota to Key West departing on 5/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from South Dakota to Key West

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
1:13 pm - 3:27 pm
FSD
-
EYW
25h 14m
1 stop
Multiple Airlines Logo
1:14 pm - 2:49 pm
EYW
-
FSD
26h 35m
2 stops
$351Multiple Airlines
Wed, Aug 5 - Tue, Aug 11
Allegiant Air Logo
6:51 pm - 2:35 pm
FSD
-
EYW
18h 44m
1 stop
Allegiant Air Logo
3:25 pm - 12:24 pm
EYW
-
FSD
21h 59m
1 stop
$355Allegiant Air
Thu, Jun 4 - Mon, Jun 8
Delta Logo
5:15 am - 5:11 pm
FSD
-
EYW
10h 56m
2 stops
Delta Logo
2:35 pm - 10:12 pm
EYW
-
FSD
8h 37m
1 stop
$393Delta
Sat, Oct 24 - Tue, Oct 27
Delta Logo
5:25 am - 1:08 pm
FSD
-
EYW
6h 43m
1 stop
Delta Logo
2:35 pm - 10:12 pm
EYW
-
FSD
8h 37m
1 stop
$421Delta
Wed, Nov 4 - Wed, Nov 11
United Airlines Logo
7:40 am - 3:06 pm
FSD
-
EYW
6h 26m
1 stop
United Airlines Logo
4:05 pm - 9:43 pm
EYW
-
FSD
6h 38m
1 stop
$423United Airlines
Wed, Oct 28 - Sat, Oct 31
American Airlines Logo
6:25 am - 4:23 pm
FSD
-
EYW
8h 58m
1 stop
American Airlines Logo
10:16 am - 7:59 pm
EYW
-
FSD
10h 43m
2 stops
$434American Airlines
Wed, Aug 5 - Wed, Aug 12
American Airlines Logo
10:59 am - 9:47 pm
FSD
-
EYW
9h 48m
2 stops
American Airlines Logo
1:45 pm - 11:59 pm
EYW
-
FSD
11h 14m
2 stops
$439American Airlines
Wed, Nov 4 - Wed, Nov 11
American Airlines Logo
10:59 am - 9:47 pm
FSD
-
EYW
9h 48m
2 stops
American Airlines Logo
1:23 pm - 6:45 pm
EYW
-
FSD
6h 22m
1 stop
$445American Airlines
Tue, Nov 3 - Tue, Nov 10
American Airlines Logo
7:02 am - 3:25 pm
FSD
-
EYW
7h 23m
1 stop
American Airlines Logo
2:21 pm - 10:17 pm
EYW
-
FSD
8h 56m
1 stop
$453American Airlines
Tue, Jun 16 - Tue, Jun 23
American Airlines Logo
6:00 am - 7:10 pm
FSD
-
EYW
12h 10m
2 stops
American Airlines Logo
2:21 pm - 10:17 pm
EYW
-
FSD
8h 56m
1 stop
$458American Airlines
Tue, Jun 16 - Tue, Jun 23

American Airlines flights from South Dakota to Key West

Our best American Airlines deals on South Dakota to Key West flight tickets
American Airlines
Aug 5
FSD6:25 amSioux Falls Joe Foss Field
8h 58m
1 stop
EYW4:23 pmKey West
Aug 12
EYW10:16 amKey West
10h 43m
2 stops
FSD7:59 pmSioux Falls Joe Foss Field
$434
American Airlines
Nov 4
FSD10:59 amSioux Falls Joe Foss Field
9h 48m
2 stops
EYW9:47 pmKey West
Nov 11
EYW1:45 pmKey West
11h 14m
2 stops
FSD11:59 pmSioux Falls Joe Foss Field
$439
American Airlines
Nov 3
FSD10:59 amSioux Falls Joe Foss Field
9h 48m
2 stops
EYW9:47 pmKey West
Nov 10
EYW1:23 pmKey West
6h 22m
1 stop
FSD6:45 pmSioux Falls Joe Foss Field
$445

Delta flights from South Dakota to Key West

Our best Delta deals on South Dakota to Key West flight tickets
Delta
Oct 24
FSD5:15 amSioux Falls Joe Foss Field
10h 56m
2 stops
EYW5:11 pmKey West
Oct 27
EYW2:35 pmKey West
8h 37m
1 stop
FSD10:12 pmSioux Falls Joe Foss Field
$393
Delta
Nov 4
FSD5:25 amSioux Falls Joe Foss Field
6h 43m
1 stop
EYW1:08 pmKey West
Nov 11
EYW2:35 pmKey West
8h 37m
1 stop
FSD10:12 pmSioux Falls Joe Foss Field
$421
Delta
Sep 17
FSD5:15 amSioux Falls Joe Foss Field
6h 54m
2 stops
EYW1:09 pmKey West
Sep 22
EYW2:35 pmKey West
8h 34m
1 stop
FSD10:09 pmSioux Falls Joe Foss Field
$523

momondo Fare Finder

 
Customize your flight search to find flights from South Dakota 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, momondo users made 832,500 searches. Data last updated May 22, 2026.
Use the filters below to find and compare flights from South Dakota to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Wed 8/5

1:13 pm-3:27 pm

1 stop25h 14m

Key West

Tue 8/11

1:14 pm-2:49 pm

2 stops26h 35m

$351

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Thu 6/4

6:51 pm-2:35 pm

1 stop18h 44m

Key West

Mon 6/8

3:25 pm-12:24 pm

1 stop21h 59m

$355

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Sat 10/24

5:15 am-5:11 pm

2 stops10h 56m

Key West

Tue 10/27

2:35 pm-10:12 pm

1 stop8h 37m

$393

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Wed 11/4

5:25 am-1:08 pm

1 stop6h 43m

Key West

Wed 11/11

2:35 pm-10:12 pm

1 stop8h 37m

$421
Quickest round-trip

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Wed 10/28

7:40 am-3:06 pm

1 stop6h 26m

Key West

Sat 10/31

4:05 pm-9:43 pm

1 stop6h 38m

$423

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Wed 8/5

6:25 am-4:23 pm

1 stop8h 58m

Key West

Wed 8/12

10:16 am-7:59 pm

2 stops10h 43m

$434

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Wed 11/4

10:59 am-9:47 pm

2 stops9h 48m

Key West

Wed 11/11

1:45 pm-11:59 pm

2 stops11h 14m

$439

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Tue 11/3

10:59 am-9:47 pm

2 stops9h 48m

Key West

Tue 11/10

1:23 pm-6:45 pm

1 stop6h 22m

$445

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Tue 6/16

7:02 am-3:25 pm

1 stop7h 23m

Key West

Tue 6/23

2:21 pm-10:17 pm

1 stop8h 56m

$453

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Tue 6/16

6:00 am-7:10 pm

2 stops12h 10m

Key West

Tue 6/23

2:21 pm-10:17 pm

1 stop8h 56m

$458

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Key West from

How to get the cheapest flight ticket from South Dakota 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 cheapest month to fly to Key West?

In general, June is the cheapest month to fly from South Dakota to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $278. If you are unable to visit Key West during the month of June, then departing from South Dakota during the month January is also very affordable. Most momondo users find prices during this month for around $282.

Can stopping save me money on South Dakota to Key West flights?

You could potentially save up to 17% on your flight if you consider stops on a South Dakota to Key West flight.

Cheap South Dakota to Key West flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from South Dakota to Key West

Fastest flight time

6h 26m

Direct flights

None
The fastest flight from South Dakota to Key West takes 6h 26m
There are no direct flights from South Dakota to Key West. There are no popular flight routes from South Dakota to Key West.
Search flight deals

Frequently asked questions about flying from South Dakota to Key West

  • When did momondo last update prices for flights from South Dakota to Key West Airport?

    Prices for flights from South Dakota to Key West Airport are updated daily.

  • How many operators does momondo search for flights from South Dakota to Key West Airport?

  • How old do you have to be to fly from South Dakota to Key West Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from South Dakota to Key West Airport.

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

    The travel and health documents required for your trip to Key West Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Key West Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from South Dakota to Key West

Compare and see reviews for airlines that fly from South Dakota to Key West with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $288Free CancellationRating
7.1
11,644 reviews
Search American Airlines flights
United AirlinesPriceFrom $456Free CancellationRating
7.4
9,751 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 South Dakota to Key West?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from South Dakota to Key West. momondo saves you time and could save you money on your trip.

Can I find flights from South Dakota to Key West with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for South Dakota to Key West flights to just show those with flexible booking policies.

How can momondo help me find flights from South Dakota to Key West?

Once you have performed a search for South Dakota 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 South Dakota to Key West right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Key West from South Dakota. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Key West trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 6/21
Sun 6/28
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States