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Cheap flights from Washington, D.C. Dulles Intl Airport to Key West from $230

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Key West departing on 8/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Key West

Cheap round-trip flights

Delta Logo
3:26 pm - 8:12 pmIAD-EYW
4h 46m1 stop
Delta Logo
7:00 am - 2:31 pmEYW-IAD
7h 31m1 stop
$234Delta
Find Deal
Wed, Aug 27 - Sat, Aug 30
Delta Logo
3:26 pm - 8:12 pmIAD-EYW
4h 46m1 stop
Delta Logo
6:20 pm - 11:21 pmEYW-IAD
5h 01m1 stop
$249Delta
Find Deal
Fri, Sep 5 - Tue, Sep 9
Delta Logo
12:39 pm - 8:12 pmIAD-EYW
7h 33m1 stop
Delta Logo
2:00 pm - 6:49 pmEYW-IAD
4h 49m1 stop
$264Delta
Find Deal
Fri, Aug 22 - Tue, Aug 26
Delta Logo
3:26 pm - 8:12 pmIAD-EYW
4h 46m1 stop
Delta Logo
7:00 am - 1:53 pmEYW-IAD
6h 53m1 stop
$274Delta
Find Deal
Sat, Sep 6 - Sat, Sep 13
United Airlines Logo
6:00 am - 2:06 pmIAD-EYW
8h 06m1 stop
United Airlines Logo
1:25 pm - 4:14 pmEYW-IAD
2h 49mnonstop
$286United Airlines
Find Deal
Fri, Dec 12 - Thu, Dec 18
United Airlines Logo
6:00 am - 2:06 pmIAD-EYW
8h 06m1 stop
United Airlines Logo
3:02 pm - 11:21 pmEYW-IAD
8h 19m1 stop
$289United Airlines
Find Deal
Sat, Dec 13 - Wed, Dec 17
American Airlines Logo
8:09 am - 1:11 pmIAD-EYW
5h 02m1 stop
American Airlines Logo
7:31 am - 1:35 pmEYW-IAD
6h 04m1 stop
$339American Airlines
Find Deal
Fri, Oct 31 - Mon, Nov 3
American Airlines Logo
7:55 am - 2:55 pmIAD-EYW
7h 00m1 stop
American Airlines Logo
12:40 pm - 7:21 pmEYW-IAD
6h 41m1 stop
$358American Airlines
Find Deal
Tue, Nov 18 - Tue, Dec 2
Logo
5:40 pm - 1:30 pmIAD-EYW
19h 50m3 stops
Logo
10:41 am - 4:06 pmEYW-IAD
5h 25m1 stop
$367
Find Deal
Thu, Nov 13 - Mon, Nov 17
Logo
4:43 pm - 9:02 amIAD-EYW
16h 19m2 stops
Logo
3:44 pm - 11:23 amEYW-IAD
19h 39m3 stops
$372
Find Deal
Fri, Sep 5 - Mon, Sep 8

Delta flights from Washington, D.C. Dulles Intl Airport to Key West

Our best Delta deals on Washington, D.C. Dulles Intl Airport to Key West flight tickets
Delta
Aug 27
IAD3:26 pmWashington, D.C. Dulles Intl
4h 46m
1 stop
EYW8:12 pmKey West
Aug 30
EYW7:00 amKey West
7h 31m
1 stop
IAD2:31 pmWashington, D.C. Dulles Intl
$234
Find similar
Delta
Sep 5
IAD3:26 pmWashington, D.C. Dulles Intl
4h 46m
1 stop
EYW8:12 pmKey West
Sep 9
EYW6:20 pmKey West
5h 01m
1 stop
IAD11:21 pmWashington, D.C. Dulles Intl
$249
Find similar
Delta
Aug 22
IAD12:39 pmWashington, D.C. Dulles Intl
7h 33m
1 stop
EYW8:12 pmKey West
Aug 26
EYW2:00 pmKey West
4h 49m
1 stop
IAD6:49 pmWashington, D.C. Dulles Intl
$264
Find similar

United Airlines flights from Washington, D.C. Dulles Intl Airport to Key West

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to Key West flight tickets
United Airlines
Dec 12
IAD6:00 amWashington, D.C. Dulles Intl
8h 06m
1 stop
EYW2:06 pmKey West
Dec 18
EYW1:25 pmKey West
2h 49m
IAD4:14 pmWashington, D.C. Dulles Intl
$286
Find similar
United Airlines
Dec 13
IAD6:00 amWashington, D.C. Dulles Intl
8h 06m
1 stop
EYW2:06 pmKey West
Dec 17
EYW3:02 pmKey West
8h 19m
1 stop
IAD11:21 pmWashington, D.C. Dulles Intl
$289
Find similar
United Airlines
Dec 13
IAD6:00 amWashington, D.C. Dulles Intl
8h 06m
1 stop
EYW2:06 pmKey West
Dec 17
EYW3:02 pmKey West
8h 19m
1 stop
IAD11:21 pmWashington, D.C. Dulles Intl
$290
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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 August 6, 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

Fly to

Route

Depart

Return

Price

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 8/27

3:26 pm-8:12 pm

1 stop4h 46m

Key West

Sat 8/30

7:00 am-2:31 pm

1 stop7h 31m

$234

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Fri 9/5

3:26 pm-8:12 pm

1 stop4h 46m

Key West

Tue 9/9

6:20 pm-11:21 pm

1 stop5h 01m

$249

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Fri 8/22

12:39 pm-8:12 pm

1 stop7h 33m

Key West

Tue 8/26

2:00 pm-6:49 pm

1 stop4h 49m

$264

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

7:00 am-1:53 pm

1 stop6h 53m

$274

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Fri 12/12

6:00 am-2:06 pm

1 stop8h 06m

Key West

Thu 12/18

1:25 pm-4:14 pm

Nonstop2h 49m

$286

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 12/13

6:00 am-2:06 pm

1 stop8h 06m

Key West

Wed 12/17

3:02 pm-11:21 pm

1 stop8h 19m

$289

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Fri 10/31

8:09 am-1:11 pm

1 stop5h 02m

Key West

Mon 11/3

7:31 am-1:35 pm

1 stop6h 04m

$339

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Tue 11/18

7:55 am-2:55 pm

1 stop7h 00m

Key West

Tue 12/2

12:40 pm-7:21 pm

1 stop6h 41m

$358

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Thu 11/13

5:40 pm-1:30 pm

3 stops19h 50m

Key West

Mon 11/17

10:41 am-4:06 pm

1 stop5h 25m

$367

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Fri 9/5

4:43 pm-9:02 am

2 stops16h 19m

Key West

Mon 9/8

3:44 pm-11:23 am

3 stops19h 39m

$372

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Key West from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport 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, July is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $388. If you are unable to visit Key West during the month of July, then departing from Washington, D.C. Dulles Intl Airport during the month August is also very affordable. Most momondo users find prices during this month for around $419.

What is the cheapest day to depart on your flight to Key West?

On average, the least expensive day to fly to Key West from Washington, D.C. Dulles Intl Airport is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $366. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. Dulles Intl Airport to Key West for around $553.

What is the cheapest time of day to depart on your flight to Key West?

According to our data, the cheapest time of day to fly to Key West is in the afternoon. momondo users have found flights departing from Washington, D.C. Dulles Intl Airport to Key West in the afternoon for as low as $340. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Key West are more costly in the evening, with an average ticket price of $559. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Washington, D.C. Dulles Intl to Key West flight route?

Fly from Washington, D.C. Dulles Intl to Key West for the best Washington, D.C. Dulles Intl - Key West flight prices

How far in advance should I book a flight to Key West?

You are more likely to see cheaper flights to Key West from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Key West for around $483 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Key West from Washington, D.C. Dulles Intl Airport for as low as $362 on momondo.

What cabin class options are available on Washington, D.C. Dulles Intl to Key West flights?

There are 3 cabin classes available to choose from on Washington, D.C. Dulles Intl to Key West flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

When to book flights from Washington, D.C. Dulles Intl Airport to Key West

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Key West according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Key West (IAD to EYW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Key West

Best Price Found

$230

Fastest flight time

3h 14m

Direct flights

Every day

Airports in Key West

1 airport
The best one-way flight to Key West from Washington, D.C. Dulles Intl Airport in the past 72 hours is $230. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Key West found on momondo in the last 72 hours is $234.
The fastest flight from Washington, D.C. Dulles Intl Airport to Key West takes 3h 14m
Direct flights go from Washington, D.C. Dulles Intl Airport to Key West every day.
There is 1 airport near Key West: Key West (EYW)
Search flight deals

  • How far is Washington, D.C. Dulles Intl to Key West by plane?

    Washington, D.C. Dulles Intl and Key West are 1025.8 mi apart from one another. Flights usually cover this in 3h 14m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Key West Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Key West Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Key West Airport?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Key West Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Key West Airport.

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

    The travel and health documents you'll need for your trip to Key West Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Key West Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Washington, D.C. Dulles Intl Airport to Key West?

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to Key West?

Best airlines flying from Washington, D.C. Dulles Intl Airport to Key West

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Key West with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $179Free CancellationRating
8.0
7,985 reviews
Search Delta flights
United AirlinesPriceFrom $248Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
American AirlinesPriceFrom $348Free CancellationRating
7.2
10,000 reviews
Search American 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 Washington, D.C. to Key West?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Key West for you.

Can I find flights from Washington, D.C. to Key West with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington, D.C. to Key West flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Key West?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Key West.

I’m not ready to book a flight from Washington, D.C. to Key West right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to Key West now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Key West and let you know when they change.

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