Key West

$138+ Cheap flights from Dulles Intl (IAD) to Key West (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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — EYW
Aug 25 — Sep 11
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Key West are usually found in July or August, booked 51 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from Dulles Intl to Key West

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 August 20, 2025.

Round-trip from

$264
(Delta)

One-way from

$138
(Kiwi.com)

Popular in

December

Cheapest in

July

Average price

$404

Good round-trip deal

$467 or less
From Washington, D.C. Dulles Intl to Key West
One-way flight from Washington, D.C. Dulles Intl to Key West
Highest demand for flights based on searches. 9% potential increase in price ($52 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Average for round-trip flights in August 2025
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Key West.

Find flight deals from Dulles Intl to Key West

Cheapest flights from Dulles Intl to Key West
Explore the most affordable flight options available from Dulles Intl to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This Delta deal was found by Cheapflights users on 8/20. 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 11/53:33 pmIAD - EYW
1 stop4h 33mDelta
Wed 11/126:00 pmEYW - IAD
1 stop5h 17mDelta
Deal found 8/20$264
This Mytrip deal was found by Cheapflights users on 8/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/313:53 pmIAD - EYW
1 stop5h 02mMultiple Airlines
Mon 11/36:36 pmEYW - IAD
2 stops16h 47mMultiple Airlines
Deal found 8/18$268
This Delta deal was found by Cheapflights users on 8/20. 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.
Sat 9/63:26 pmIAD - EYW
1 stop4h 46mDelta
Sat 9/136:10 pmEYW - IAD
1 stop5h 07mDelta
Deal found 8/20$269
This Delta deal was found by Cheapflights users on 8/20. 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 9/176:00 amIAD - EYW
1 stop4h 55mDelta
Mon 9/226:10 pmEYW - IAD
1 stop6h 03mDelta
Deal found 8/20$289
This Delta deal was found by Cheapflights users on 8/20. 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 8/2712:20 pmIAD - EYW
1 stop5h 05mDelta
Sat 8/306:20 pmEYW - IAD
1 stop5h 01mDelta
Deal found 8/20$293
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Thu 9/46:20 amIAD - EYW
1 stop7h 41mUnited Airlines
Mon 9/83:50 pmEYW - IAD
1 stop6h 49mUnited Airlines
Deal found 8/19$294
This United Airlines deal was found by Cheapflights users on 8/20. 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.
Sun 12/76:00 amIAD - EYW
1 stop8h 06mUnited Airlines
Thu 12/113:02 pmEYW - IAD
1 stop6h 19mUnited Airlines
Deal found 8/20$297
This Delta deal was found by Cheapflights users on 8/20. 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.
Sat 8/303:26 pmIAD - EYW
1 stop4h 46mDelta
Wed 9/311:52 amEYW - IAD
1 stop6h 57mDelta
Deal found 8/20$299
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Fri 10/178:25 amIAD - EYW
2 stops11h 30mMultiple Airlines
Mon 10/209:50 amEYW - IAD
1 stop10h 56mMultiple Airlines
Deal found 8/19$301
This Delta deal was found by Cheapflights users on 8/18. 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.
Sat 9/276:23 amIAD - EYW
1 stop4h 32mDelta
Wed 10/17:00 amEYW - IAD
1 stop7h 33mDelta
Deal found 8/18$304
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Fri 11/75:34 pmIAD - EYW
2 stops15h 27mMultiple Airlines
Mon 11/1010:41 amEYW - IAD
1 stop8h 25mMultiple Airlines
Deal found 8/18$305

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 August 20, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Key West that are best for you.

Fly from

Dulles Intl

Fly to

Key West

Route

Depart

Return

Price

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 11/5

3:33 pm-8:06 pm

1 stop4h 33m

Key West

Wed 11/12

6:00 pm-11:17 pm

1 stop5h 17m

$264

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 9/6

6:20 am-2:11 pm

1 stop7h 51m

Key West

Tue 9/23

3:50 pm-10:39 pm

1 stop6h 49m

$264

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Fri 10/31

3:53 pm-8:55 pm

1 stop5h 02m

Key West

Mon 11/3

6:36 pm-11:23 am

2 stops16h 47m

$268

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 9/6

3:26 pm-8:12 pm

1 stop4h 46m

Key West

Sat 9/13

6:10 pm-11:17 pm

1 stop5h 07m

$269

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 9/13

12:35 pm-8:07 pm

1 stop7h 32m

Key West

Sat 9/20

6:10 pm-11:17 pm

1 stop5h 07m

$269

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Tue 10/28

10:11 am-5:21 pm

1 stop7h 10m

Key West

Tue 11/4

12:22 pm-4:57 pm

1 stop4h 35m

$289

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Mon 9/29

6:00 am-10:55 am

1 stop4h 55m

Key West

Sat 10/4

6:10 pm-11:17 pm

1 stop5h 07m

$289

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Tue 9/23

12:35 pm-8:07 pm

1 stop7h 32m

Key West

Sat 9/27

6:10 pm-11:17 pm

1 stop5h 07m

$289

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 9/17

6:00 am-10:55 am

1 stop4h 55m

Key West

Mon 9/22

6:10 pm-12:13 am

1 stop6h 03m

$289

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 8/27

12:20 pm-5:25 pm

1 stop5h 05m

Key West

Sat 8/30

6:20 pm-11:21 pm

1 stop5h 01m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 20 results
1
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Best time to book a flight from Dulles Intl to Key West

Have a flexible travel schedule? Discover the best time to fly to Key West from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Key West

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Key West?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Key West. Price data was last updated on August 8, 2025.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Key West may vary depending on when you book. For the best chance of a lower fare, look to book 50 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Key West?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Key West (average of $328). Flying from Washington, D.C. Dulles Intl Airport 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.

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

Find hourly flight availability from Dulles Intl to Key West. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to Key West in the afternoon. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the morning.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport 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 August 20, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport 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.
8.0
Very good

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

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.
8.0
Very good
8.0
Very good

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

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.
8.0
Very good

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

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.
8.0
Very good

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

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 Dulles Intl 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 airport do you fly into for flights to Key West from Washington, D.C. Dulles Intl?

    Key West (EYW) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to Key West. You should not have trouble finding flights to Key West from Washington, D.C. Dulles Intl; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 3 airlines have flights to the Key West airport from Washington, D.C. Dulles Intl. It is only a 2.6 mi journey from Key West (EYW) to Key West’s city center.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Key West?

    Airlines like Delta and United Airlines fly from Washington, D.C. Dulles Intl Airport to Key West in about 4h 33m. The time it takes to get you to your destination can typically vary by up to 3h 18m. Airlines will cover a distance of 1025 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Key West round-trip?

    According to our current data, Delta ($179), United Airlines ($248), and American Airlines ($348) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Key West. Delta is 63% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Key West?

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Key West is $268. On average you can expect to pay $559. The most popular route, (Washington, D.C. Dulles Intl - Key West), can usually be booked for $249.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Key West?

    Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Key West (average of $328). Flying from Washington, D.C. Dulles Intl Airport 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 Dulles Intl to Key West

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

Top 3 airlines flying from Dulles Intl to Key West

Discover the top 3 airlines that operate flights from Dulles Intl 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$179Average$440FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$499FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$348Average$489FlexibilityNo cancel feeOn-time71%

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