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Cheap flights from Washington, D.C. Dulles Intl Airport to Key West from $86

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 12/6. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:35 pm - 7:55 pmIAD-EYW
5h 20m1 stop
Multiple Airlines Logo
8:55 am - 6:16 pmEYW-IAD
9h 21m2 stops
$284Multiple Airlines
Find Deal
Wed, Dec 31 - Thu, Jan 1
Multiple Airlines Logo
9:41 am - 9:17 amIAD-EYW
23h 36m1 stop
Multiple Airlines Logo
7:47 am - 5:47 pmEYW-IAD
10h 00m2 stops
$285Multiple Airlines
Find Deal
Thu, Dec 18 - Wed, Dec 24
Multiple Airlines Logo
2:35 pm - 7:55 pmIAD-EYW
5h 20m1 stop
Multiple Airlines Logo
8:55 am - 6:16 pmEYW-IAD
9h 21m2 stops
$286Multiple Airlines
Find Deal
Wed, Dec 31 - Thu, Jan 1
United Airlines Logo
1:00 pm - 4:22 pmIAD-EYW
3h 22mnonstop
United Airlines Logo
6:05 pm - 8:53 pmEYW-IAD
2h 48mnonstop
$287United Airlines
Find Deal
Sat, Jan 10 - Mon, Jan 12
Multiple Airlines Logo
9:26 am - 10:07 amIAD-EYW
24h 41m1 stop
Multiple Airlines Logo
8:55 am - 6:16 pmEYW-IAD
9h 21m2 stops
$288Multiple Airlines
Find Deal
Fri, Dec 12 - Thu, Dec 18
Multiple Airlines Logo
5:20 pm - 12:26 pmIAD-EYW
19h 06m2 stops
Multiple Airlines Logo
9:46 am - 9:13 pmEYW-IAD
11h 27m1 stop
$290Multiple Airlines
Find Deal
Thu, Mar 5 - Thu, Mar 12
Multiple Airlines Logo
10:15 pm - 8:15 amIAD-EYW
10h 00m1 stop
Multiple Airlines Logo
8:55 am - 6:16 pmEYW-IAD
9h 21m2 stops
$291Multiple Airlines
Find Deal
Sat, Dec 20 - Thu, Dec 25
Multiple Airlines Logo
9:20 pm - 1:40 pmIAD-EYW
16h 20m2 stops
Multiple Airlines Logo
4:31 pm - 8:26 amEYW-IAD
15h 55m1 stop
$292Multiple Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10
Multiple Airlines Logo
4:57 pm - 2:42 pmIAD-EYW
21h 45m1 stop
Multiple Airlines Logo
12:20 pm - 11:38 amEYW-IAD
23h 18m2 stops
$294Multiple Airlines
Find Deal
Sat, Dec 27 - Thu, Jan 1
Multiple Airlines Logo
7:05 pm - 9:26 amIAD-EYW
14h 21m2 stops
Multiple Airlines Logo
10:49 am - 8:18 pmEYW-IAD
9h 29m1 stop
$295Multiple Airlines
Find Deal
Sat, Jan 10 - Sat, Jan 17

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
Jan 10
IAD1:00 pmWashington, D.C. Dulles Intl
3h 22m
EYW4:22 pmKey West
Jan 12
EYW6:05 pmKey West
2h 48m
IAD8:53 pmWashington, D.C. Dulles Intl
$287
Find similar
United Airlines
Dec 18
IAD1:06 pmWashington, D.C. Dulles Intl
3h 23m
EYW4:29 pmKey West
Dec 26
EYW5:10 pmKey West
2h 49m
IAD7:59 pmWashington, D.C. Dulles Intl
$309
Find similar
United Airlines
Jan 31
IAD1:00 pmWashington, D.C. Dulles Intl
3h 22m
EYW4:22 pmKey West
Feb 4
EYW2:25 pmKey West
6h 48m
1 stop
IAD9:13 pmWashington, D.C. Dulles Intl
$314
Find similar

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
Jan 10
IAD12:33 pmWashington, D.C. Dulles Intl
7h 07m
1 stop
EYW7:40 pmKey West
Jan 13
EYW7:10 amKey West
6h 49m
1 stop
IAD1:59 pmWashington, D.C. Dulles Intl
$296
Find similar
Delta
Jan 23
IAD12:40 pmWashington, D.C. Dulles Intl
7h 00m
1 stop
EYW7:40 pmKey West
Jan 26
EYW6:06 pmKey West
6h 18m
1 stop
IAD12:24 amWashington, D.C. Dulles Intl
$304
Find similar
Delta
Jan 12
IAD7:49 pmWashington, D.C. Dulles Intl
15h 40m
2 stops
EYW11:29 amKey West
Jan 26
EYW6:06 pmKey West
6h 18m
1 stop
IAD12:24 amWashington, D.C. Dulles Intl
$322
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 November 26, 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 12/31

2:35 pm-7:55 pm

1 stop5h 20m

Key West

Thu 1/1

8:55 am-6:16 pm

2 stops9h 21m

$284

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Thu 12/18

9:41 am-9:17 am

1 stop23h 36m

Key West

Wed 12/24

7:47 am-5:47 pm

2 stops10h 00m

$285

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 12/31

2:35 pm-7:55 pm

1 stop5h 20m

Key West

Thu 1/1

8:55 am-6:16 pm

2 stops9h 21m

$286

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 1/10

1:00 pm-4:22 pm

Nonstop3h 22m

Key West

Mon 1/12

6:05 pm-8:53 pm

Nonstop2h 48m

$287

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Fri 12/12

9:26 am-10:07 am

1 stop24h 41m

Key West

Thu 12/18

8:55 am-6:16 pm

2 stops9h 21m

$288

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Thu 3/5

5:20 pm-12:26 pm

2 stops19h 06m

Key West

Thu 3/12

9:46 am-9:13 pm

1 stop11h 27m

$290

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 12/20

10:15 pm-8:15 am

1 stop10h 00m

Key West

Thu 12/25

8:55 am-6:16 pm

2 stops9h 21m

$291

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 12/6

9:20 pm-1:40 pm

2 stops16h 20m

Key West

Wed 12/10

4:31 pm-8:26 am

1 stop15h 55m

$292

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 12/27

4:57 pm-2:42 pm

1 stop21h 45m

Key West

Thu 1/1

12:20 pm-11:38 am

2 stops23h 18m

$294

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 1/10

7:05 pm-9:26 am

2 stops14h 21m

Key West

Sat 1/17

10:49 am-8:18 pm

1 stop9h 29m

$295

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, August 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 $343. If you are unable to visit Key West during the month of August, then departing from Washington, D.C. Dulles Intl Airport during the month July is also very affordable. Most momondo users find prices during this month for around $401.

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 $362. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, 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 $522.

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 at noon. momondo users have found flights departing from Washington, D.C. Dulles Intl Airport to Key West at noon for as low as $335. 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 $486 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 $380 on momondo.

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

There is only 1 cabin class 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.

Can stopping save me money on Washington, D.C. Dulles Intl Airport to Key West flights?

No. A direct flight is the cheapest option for a flight between Washington, D.C. Dulles Intl Airport to Key West.

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

$359

Fastest flight time

3h 17m

Direct flights

Every day

Airports in Key West

1 airport
The best flight deal from Washington, D.C. Dulles Intl Airport to Key West found on momondo in the last 72 hours is $359
The fastest flight from Washington, D.C. Dulles Intl Airport to Key West takes 3h 17m
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 22m, 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
7.9
7,998 reviews
Search Delta flights
United AirlinesPriceFrom $250Free CancellationRating
7.4
9,046 reviews
Search United Airlines flights
American AirlinesPriceFrom $354Free CancellationRating
7.2
11,038 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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