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Cheap flights from Washington, D.C. Dulles Intl Airport to Key West from $109

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 12/24. 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.
United Airlines Logo
8:15 am - 11:41 am
IAD
-
EYW
3h 26mnonstop
United Airlines Logo
1:25 pm - 4:14 pm
EYW
-
IAD
2h 49mnonstop
$279United Airlines
Thu, Dec 25 - Wed, Dec 31
Multiple Airlines Logo
3:21 pm - 9:09 am
IAD
-
EYW
17h 48m1 stop
Multiple Airlines Logo
3:46 pm - 2:18 pm
EYW
-
IAD
22h 32m2 stops
$280Multiple Airlines
Thu, Jan 8 - Sun, Jan 11
Allegiant Air Logo
2:35 pm - 7:55 pm
IAD
-
EYW
5h 20m1 stop
Allegiant Air Logo
3:15 pm - 1:45 pm
EYW
-
IAD
22h 30m2 stops
$281Allegiant Air
Wed, Dec 24 - Tue, Dec 30
Multiple Airlines Logo
2:35 pm - 7:55 pm
IAD
-
EYW
5h 20m1 stop
Multiple Airlines Logo
10:37 pm - 9:48 am
EYW
-
IAD
11h 11m1 stop
$285Multiple Airlines
Wed, Dec 24 - Sun, Dec 28
Multiple Airlines Logo
5:39 pm - 9:09 am
IAD
-
EYW
15h 30m2 stops
Multiple Airlines Logo
4:13 pm - 7:20 am
EYW
-
IAD
15h 07m1 stop
$286Multiple Airlines
Sun, Feb 22 - Thu, Feb 26
Multiple Airlines Logo
10:15 pm - 8:15 am
IAD
-
EYW
10h 00m1 stop
Multiple Airlines Logo
1:57 pm - 1:33 pm
EYW
-
IAD
23h 36m2 stops
$287Multiple Airlines
Sat, Jan 3 - Thu, Apr 30
United Airlines Logo
1:00 pm - 4:22 pm
IAD
-
EYW
3h 22mnonstop
United Airlines Logo
6:05 pm - 8:53 pm
EYW
-
IAD
2h 48mnonstop
$288United Airlines
Tue, Jan 20 - Sat, Jan 24
Multiple Airlines Logo
2:35 pm - 7:55 pm
IAD
-
EYW
5h 20m1 stop
Multiple Airlines Logo
9:57 am - 8:51 am
EYW
-
IAD
22h 54m1 stop
$289Multiple Airlines
Wed, Dec 24 - Fri, Dec 26
Multiple Airlines Logo
2:35 pm - 7:55 pm
IAD
-
EYW
5h 20m1 stop
Multiple Airlines Logo
1:10 pm - 9:03 pm
EYW
-
IAD
7h 53m1 stop
$292Multiple Airlines
Wed, Dec 24 - Mon, Dec 29
United Airlines Logo
1:00 pm - 4:22 pm
IAD
-
EYW
3h 22mnonstop
United Airlines Logo
6:05 pm - 8:53 pm
EYW
-
IAD
2h 48mnonstop
$293United Airlines
Thu, Jan 8 - Thu, Jan 15

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 25
IAD8:15 amWashington, D.C. Dulles Intl
3h 26m
EYW11:41 amKey West
Dec 31
EYW1:25 pmKey West
2h 49m
IAD4:14 pmWashington, D.C. Dulles Intl
$279
Find similar
United Airlines
Dec 25
IAD8:15 amWashington, D.C. Dulles Intl
3h 26m
EYW11:41 amKey West
Dec 29
EYW5:10 pmKey West
2h 49m
IAD7:59 pmWashington, D.C. Dulles Intl
$286
Find similar
United Airlines
Jan 20
IAD1:00 pmWashington, D.C. Dulles Intl
3h 22m
EYW4:22 pmKey West
Jan 24
EYW6:05 pmKey West
2h 48m
IAD8:53 pmWashington, D.C. Dulles Intl
$288
Find similar

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

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to Key West flight tickets
American Airlines
Feb 14
IAD4:40 pmWashington, D.C. Dulles Intl
6h 03m
1 stop
EYW10:43 pmKey West
Feb 18
EYW6:20 pmKey West
5h 14m
1 stop
IAD11:34 pmWashington, D.C. Dulles Intl
$343
Find similar
American Airlines
Apr 4
IAD2:03 pmWashington, D.C. Dulles Intl
9h 53m
2 stops
EYW11:56 pmKey West
Apr 8
EYW5:22 pmKey West
6h 33m
1 stop
IAD11:55 pmWashington, D.C. Dulles Intl
$348
Find similar
American Airlines
Dec 17
IAD11:25 amWashington, D.C. Dulles Intl
6h 27m
1 stop
EYW5:52 pmKey West
Dec 21
EYW4:40 pmKey West
7h 24m
1 stop
IAD12:04 amWashington, D.C. Dulles Intl
$436
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 December 11, 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

Thu 12/25

8:15 am-11:41 am

Nonstop3h 26m

Key West

Wed 12/31

1:25 pm-4:14 pm

Nonstop2h 49m

$279

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Thu 1/8

3:21 pm-9:09 am

1 stop17h 48m

Key West

Sun 1/11

3:46 pm-2:18 pm

2 stops22h 32m

$280

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 12/24

2:35 pm-7:55 pm

1 stop5h 20m

Key West

Tue 12/30

3:15 pm-1:45 pm

2 stops22h 30m

$281

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 12/24

2:35 pm-7:55 pm

1 stop5h 20m

Key West

Sun 12/28

10:37 pm-9:48 am

1 stop11h 11m

$285

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sun 2/22

5:39 pm-9:09 am

2 stops15h 30m

Key West

Thu 2/26

4:13 pm-7:20 am

1 stop15h 07m

$286

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 1/3

10:15 pm-8:15 am

1 stop10h 00m

Key West

Thu 4/30

1:57 pm-1:33 pm

2 stops23h 36m

$287

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Tue 1/20

1:00 pm-4:22 pm

Nonstop3h 22m

Key West

Sat 1/24

6:05 pm-8:53 pm

Nonstop2h 48m

$288

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 12/24

2:35 pm-7:55 pm

1 stop5h 20m

Key West

Fri 12/26

9:57 am-8:51 am

1 stop22h 54m

$289

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 12/24

2:35 pm-7:55 pm

1 stop5h 20m

Key West

Mon 12/29

1:10 pm-9:03 pm

1 stop7h 53m

$292

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Thu 1/8

1:00 pm-4:22 pm

Nonstop3h 22m

Key West

Thu 1/15

6:05 pm-8:53 pm

Nonstop2h 48m

$293

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 $524.

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 $333. 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 $477 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 $381 on momondo.

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

There are 2 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.

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

$309

Fastest flight time

3h 21m

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 $309
The fastest flight from Washington, D.C. Dulles Intl Airport to Key West takes 3h 21m
Direct flights go from Washington, D.C. Dulles Intl Airport to Key West every day.
There is 1 airport in Key West. From Washington, D.C. Dulles Intl Airport there are direct flights to 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 21m, 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
8,008 reviews
Search Delta flights
United AirlinesPriceFrom $250Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
American AirlinesPriceFrom $354Free CancellationRating
7.2
11,050 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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