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Key West

$351+ Cheap flights from Sioux Falls to Key West (FSD - EYW)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — EYW
Jul 9 — Jul 161
Thu 7/9
Thu 7/16
1 adult, Economy
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Cheap flight deals from Sioux Falls to Key West

Cheapest flights from Sioux Falls to Key West
Explore the most affordable flight options available from Sioux Falls to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 9, 2026.

This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:23 am
FSD
-
EYW
2 stops10h 27m
Delta
Wed 9/231:57 pm
EYW
-
FSD
1 stop6h 52m
Delta
Deal found 6/6$351
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:23 am
FSD
-
EYW
2 stops10h 27m
Delta
Tue 9/221:57 pm
EYW
-
FSD
1 stop6h 52m
Delta
Deal found 6/8$374
This American Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:00 am
FSD
-
EYW
2 stops9h 55m
American Airlines
Tue 9/2211:30 am
EYW
-
FSD
2 stops9h 13m
American Airlines
Deal found 6/8$386
This American Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:00 am
FSD
-
EYW
2 stops9h 18m
American Airlines
Tue 8/114:50 pm
EYW
-
FSD
2 stops8h 40m
American Airlines
Deal found 6/6$419
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:15 am
FSD
-
EYW
2 stops10h 56m
Delta
Sat 10/312:35 pm
EYW
-
FSD
1 stop8h 37m
Delta
Deal found 6/9$421
This American Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:02 am
FSD
-
EYW
1 stop7h 23m
American Airlines
Tue 6/234:44 pm
EYW
-
FSD
2 stops8h 36m
American Airlines
Deal found 6/6$434
This United Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:40 am
FSD
-
EYW
1 stop6h 26m
United Airlines
Sat 10/314:05 pm
EYW
-
FSD
1 stop6h 38m
United Airlines
Deal found 6/5$436

Find flight deals from Sioux Falls to Key West

Discover tips and strategies to find the most affordable flight options for your journey from Sioux Falls (FSD) 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 June 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$351
(Delta)

Popular in

December

Cheapest in

September

Average price

$517
Provider with most accurate pricing for Sioux Falls Joe Foss Field-Key West flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sioux Falls Joe Foss Field-Key West flights.
Search Deals
From Sioux Falls Joe Foss Field to Key West
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($141 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sioux Falls 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 2,558,603 searches. Data last updated June 9, 2026.
Use the filters below to find and compare flights from Sioux Falls to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
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

$441

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Fri 9/18

8:23 am-7:50 pm

2 stops10h 27m

Key West

Tue 9/22

1:57 pm-10:51 pm

2 stops9h 54m

$449

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Wed 10/28

5:15 am-5:11 pm

2 stops10h 56m

Key West

Sat 10/31

2:35 pm-10:12 pm

1 stop8h 37m

$454

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Wed 8/5

6:00 am-4:18 pm

1 stop9h 18m

Key West

Tue 8/11

11:30 am-7:59 pm

2 stops9h 29m

$467

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Wed 8/5

5:30 am-1:00 pm

1 stop6h 30m

Key West

Tue 8/11

1:59 pm-7:59 pm

1 stop7h 00m

$561

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Sat 9/19

5:30 am-12:58 pm

1 stop6h 28m

Key West

Tue 9/22

1:57 pm-7:49 pm

1 stop6h 52m

$589

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/7

Sorted by cheapest first

Compare providers for flights from Sioux Falls to Key West

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sioux Falls to Key West in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sioux Falls-Key West flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sioux Falls-Key West flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sioux Falls-Key West flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sioux Falls-Key West flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sioux Falls-Key West flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sioux Falls to Key West

Have a flexible travel schedule? Discover the best time to fly to Key West from Sioux Falls with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Sioux Falls to Key West

What is the cheapest month to book a flight from Sioux Falls to Key West?

Currently, September is the cheapest month in which you can book a flight from Sioux Falls to Key West (average of $386). Flying from Sioux Falls to Key West in December is currently the most expensive (average of $1,105). 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.

How much does it cost to fly round-trip from Sioux Falls to Key West?

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 June 9, 2026.
Get a feel of what it's like to fly with United Airlines and American Airlines from Sioux Falls to Key West by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,803 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,803 reviews
United Airlines
7.4
Good
9,803 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
American Airlines
7.1
Good
11,642 reviews
United Airlines
7.4
Good
9,803 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Related info for your journey

Find useful and relevant information for your journey from Sioux Falls to Key West. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Sioux Falls to Key West?

    There are many flights that can get you from Sioux Falls to Key West in 6h 26m. Fly via United Airlines or Delta to get the fastest option. The distance from Sioux Falls to Key West is about 1563 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Sioux Falls to Key West round-trip?

    Flying on American Airlines is currently your cheapest option to Key West, with prices starting at $310. Another option worth looking into is United Airlines, starting at $456 round trip. You may be able to fly from Sioux Falls to Key West for 40% less than the average price by searching for these airlines.

  • Can I find deals for flights from Sioux Falls to Key West that include hotel bookings?

    Yes. In addition to deals on Sioux Falls to Key West flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sioux Falls to Key West?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sioux Falls to Key West.

  • Can I find deals for business class flights from Sioux Falls to Key West?

    Yes. Cheapflights offers flight deals from Sioux Falls to Key West by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Sioux Falls to Key West?

    Currently, September is the cheapest month in which you can book a flight from Sioux Falls to Key West (average of $386). Flying from Sioux Falls to Key West in December is currently the most expensive (average of $1,105). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Sioux Falls to Key West

Discover the top 2 airlines that operate flights from Sioux Falls 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 2,558,603 searches. Data last updated June 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$310Average$452FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$456Average$714FlexibilityNo cancel feeOn-time69%

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