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

Flying on Delta is currently your cheapest option to Key West, with prices starting at $283. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $288 and $689, respectively. You may be able to fly from Sioux Falls to Key West for 45% less than the average price by searching for these airlines.

What is the cheapest day to fly from Sioux Falls to Key West?

Travelers seeking maximum savings on their Sioux Falls to Key West flight should consider departing on Friday mornings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Key West ranges from 1.5 - 6.7 inches per month. September is typically the wettest month, when rainfall can reach 6.7 in. February is typically the driest time to visit Key West when rainfall is around 1.5 in.

If weather is an important factor for your trip to Key West, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 69.8 F).

What are the most popular airlines that fly from Sioux Falls to Key West?

American Airlines, Delta and United Airlines are the most popular airlines when flying from Sioux Falls to Key West.

What is the cheapest day to fly round-trip from Sioux Falls to Key West?

It’s generally more expensive to depart on a Thursday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

What is the cheapest month to fly from Sioux Falls to Key West?

Due to multiple factors, expect to potentially pay more when booking in April. For low rates, July can be a great choice for travel to Key West. Flights to Key West from Sioux Falls in July are about $523 on average during July, but can be found for as low as $310.

What is the cheapest time of day to fly from FSD to EYW?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Sioux Falls to Key West as you normally would.

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.

$283+ Flights from Sioux Falls to Key West

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

Airfare is below average for this route at the moment. Sioux Falls to Key West flights typically cost between $427 and $590 in August. The cheapest round-trip price found within the last 3 days was $283 on Delta (Aug 26-Aug 30).

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Cheap flight deals from Sioux Falls to Key West

Round-trip from	$283 (Delta)
Popular in	April
Cheapest in	July
Average price	$310

From Sioux Falls Joe Foss Field to Key West

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($90 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

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Find 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 July 28, 2025.

Tue 8/265:27 amFSD - EYW

1 stop6h 38mDelta

Sat 8/306:20 pmEYW - FSD

1 stop5h 46mDelta

Deal found 7/27

$283

Sat 11/86:30 amFSD - EYW

2 stops14h 19mAmerican Airlines

Wed 11/122:39 pmEYW - FSD

1 stop7h 31mAmerican Airlines

Deal found 7/27

$288

Mon 12/156:08 pmFSD - EYW

2 stops18h 58mUnited Airlines

Sat 12/204:05 pmEYW - FSD

2 stops32h 50mUnited Airlines

Deal found 7/27

$689

Best flights from Sioux Falls to Key West
Discover carefully curated flight deals from Sioux Falls to Key West that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2025.

Tue 8/265:27 amFSD - EYW

1 stop6h 38mDelta

Sat 8/306:20 pmEYW - FSD

1 stop5h 46mDelta

Deal found 7/27

$283

Sat 11/86:30 amFSD - EYW

2 stops14h 19mAmerican Airlines

Wed 11/122:39 pmEYW - FSD

1 stop7h 31mAmerican Airlines

Deal found 7/27

$288

Mon 12/156:08 pmFSD - EYW

2 stops18h 58mUnited Airlines

Sat 12/204:05 pmEYW - FSD

2 stops32h 50mUnited Airlines

Deal found 7/27

$689

Last-minute flights from Sioux Falls to Key West
Discover last-minute flight deals from Sioux Falls to Key West. Data last updated July 28, 2025 and is based on user searches.

Sun 8/35:15 amFSD - EYW

1 stop6h 53mDelta

Thu 8/76:27 pmEYW - FSD

1 stop5h 36mDelta

Deal found 7/27

$862

Sun 8/35:58 pmFSD - EYW

2 stops18h 53mAmerican Airlines

Thu 8/71:29 pmEYW - FSD

2 stops11h 59mAmerican Airlines

Deal found 7/27

$866

Tue 8/265:27 amFSD - EYW

1 stop6h 38mDelta

Sat 8/306:20 pmEYW - FSD

1 stop5h 46mDelta

Deal found 7/27

$283

Tue 8/266:00 amFSD - EYW

2 stops9h 46mAmerican Airlines

Sat 8/303:59 pmEYW - FSD

1 stop6h 04mAmerican Airlines

Deal found 7/26

$288

Cheapflights Fare Finder

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

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Tue 8/26

5:27 am-1:05 pm

1 stop6h 38m

Key West

Sat 8/30

6:20 pm-11:06 pm

1 stop5h 46m

$283

Sioux FallsKey West

FSD - EYW

FSDEYW

Sioux Falls Joe Foss Field

Tue 8/26

6:00 am-4:46 pm

2 stops9h 46m

Key West

Sat 8/30

3:59 pm-9:03 pm

1 stop6h 04m

$288

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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, August is the cheapest month in which you can book a flight from Sioux Falls to Key West (average of $328). Flying from Sioux Falls to Key West in March is currently the most expensive (average of $492). 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 a feel of what it's like to fly with Delta, 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.

Delta

8.0

Very good

7,971 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,971 reviews

Delta

8.0

Very good

7,971 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,893 reviews

Delta

8.0

Very good

7,971 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,971 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Sioux Falls to Key West round-trip?
Flying on Delta is currently your cheapest option to Key West, with prices starting at $283. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $288 and $689, respectively. You may be able to fly from Sioux Falls to Key West for 45% 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, August is the cheapest month in which you can book a flight from Sioux Falls to Key West (average of $328). Flying from Sioux Falls to Key West in March is currently the most expensive (average of $492). 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

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Alternative routes for Sioux Falls to Key West

Other flights to Key West

Top 3 airlines flying from Sioux Falls to Key West

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$288	Average$538	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$343	Average$593	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$353	Average$538	FlexibilityNo cancel fee	On-time69%

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$283+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Sioux Falls to Key West with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Sioux Falls to Key West

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Sioux Falls to Key West

Cheapest flights from Sioux Falls to Key WestExplore 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 July 28, 2025.

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 July 28, 2025.

Cheapflights Fare Finder

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

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.

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?

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

Reviews of airlines servicing Key West

Get a feel of what it's like to fly with Delta, 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.

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.

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Sioux Falls to Key West

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Sioux Falls to Key West

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Book with Flexibility

Travel Smart

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 July 28, 2025.