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$143+ Cheap flights from Denver to Key West (DEN - EYW)

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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — EYW
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Key West are usually found in August or September, booked 86 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Denver to Key West

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) 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 September 17, 2025.

Round-trip from

$231
(American Airlines)

One-way from

$143
(Priceline)

Popular in

March

Cheapest in

August

Average price

$324
From Denver Intl to Key West
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One-way flight from Denver Intl to Key West
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Highest demand for flights based on searches. 7% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Denver to Key West

Cheapest flights from Denver to Key West
Explore the most affordable flight options available from Denver to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This American Airlines deal was found by Cheapflights users on 9/15. 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 11/156:00 amDEN - EYW
1 stop8h 16mAmerican Airlines
Sat 11/225:40 pmEYW - DEN
1 stop8h 16mAmerican Airlines
Deal found 9/15$231
This American Airlines deal was found by Cheapflights users on 9/15. 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 11/810:13 amDEN - EYW
1 stop9h 36mAmerican Airlines
Sat 11/154:59 pmEYW - DEN
1 stop7h 20mAmerican Airlines
Deal found 9/15$232
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/298:11 amDEN - EYW
2 stops9h 11mAmerican Airlines
Tue 11/41:33 pmEYW - DEN
2 stops10h 49mAmerican Airlines
Deal found 9/14$241
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/298:11 amDEN - EYW
2 stops9h 11mAmerican Airlines
Mon 11/31:23 pmEYW - DEN
1 stop9h 45mAmerican Airlines
Deal found 9/15$262
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/811:59 pmDEN - EYW
1 stop17h 47mMultiple Airlines
Sat 11/159:51 amEYW - DEN
1 stop24h 52mMultiple Airlines
Deal found 9/16$266
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/155:45 amDEN - EYW
2 stops9h 31mAmerican Airlines
Wed 10/222:14 pmEYW - DEN
1 stop9h 56mAmerican Airlines
Deal found 9/15$279
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Thu 11/2010:13 amDEN - EYW
1 stop9h 34mAmerican Airlines
Mon 11/244:55 pmEYW - DEN
1 stop7h 27mAmerican Airlines
Deal found 9/16$283

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver 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 September 17, 2025.
Use the filters below to find and compare flights from Denver to Key West that are best for you.

Fly from

Denver

Fly to

Key West

Route

Depart

Return

Price

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Sat 11/15

10:13 am-9:49 pm

1 stop9h 36m

Key West

Wed 11/19

4:10 pm-9:48 pm

1 stop7h 38m

$231

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Sat 11/15

11:59 pm-1:03 pm

2 stops11h 04m

Key West

Sat 11/22

5:40 pm-11:56 pm

1 stop8h 16m

$236

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Sat 11/8

8:13 am-9:49 pm

2 stops11h 36m

Key West

Sat 11/15

1:57 pm-10:09 pm

2 stops10h 12m

$286

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Thu 10/30

1:42 pm-9:17 am

2 stops17h 35m

Key West

Tue 11/4

11:45 am-12:07 pm

1 stop26h 22m

$291

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Sat 9/20

10:39 am-8:07 pm

1 stop7h 28m

Key West

Tue 9/23

2:00 pm-8:08 pm

1 stop8h 08m

$317

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Sat 9/27

8:10 am-6:59 pm

2 stops8h 49m

Key West

Tue 9/30

1:59 pm-10:16 pm

2 stops10h 17m

$327

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Fri 10/17

12:36 am-8:15 am

1 stop29h 39m

Key West

Thu 10/23

10:59 am-11:48 pm

2 stops14h 49m

$335

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Mon 9/29

12:59 am-10:55 am

1 stop7h 56m

Key West

Tue 10/7

1:57 pm-8:15 pm

1 stop8h 18m

$344

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Sun 10/19

12:50 am-11:27 am

1 stop8h 37m

Key West

Sat 10/25

1:57 pm-8:15 pm

1 stop8h 18m

$361

DenverKey West

DEN - EYW

DENEYW

Denver Intl

Fri 10/31

1:42 pm-10:07 am

2 stops18h 25m

$152

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 14 results
1
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Best time to book a flight from Denver to Key West

Have a flexible travel schedule? Discover the best time to fly to Key West from Denver 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 Denver to Key West

How far ahead should I book a flight from Denver to Key West?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Key West. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from Denver to Key West, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Denver to Key West (average of $328). Flying from Denver to Key West in March is currently the most expensive (average of $491). 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.

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 September 17, 2025.
Read through reviews of airlines operating flights from Denver to Key West, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

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.
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

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.
United Airlines
7.4
Good
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

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.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

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 Denver 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 Denver to Key West?

    Airlines like American Airlines and Delta fly from Denver to Key West in about 7h 28m. The time it takes to get you to your destination can typically vary by up to 2h 08m. The distance from Denver to Key West is about 1696 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from Denver to Key West is American Airlines. Our recent data shows that you can find tickets from as low as $230 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $236 and $357 round-trip. Users have found that American Airlines is 43% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver 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 Denver to Key West?

    Currently, August is the cheapest month in which you can book a flight from Denver to Key West (average of $328). Flying from Denver to Key West in March is currently the most expensive (average of $491). 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.

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Top 3 airlines flying from Denver to Key West

Discover the top 3 airlines that operate flights from Denver 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$230Average$369FlexibilityNo cancel feeOn-time71%
DeltaCheapest$236Average$389FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$357Average$568FlexibilityNo cancel feeOn-time69%

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