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Cheap flights from Washington, D.C. Dulles Intl Airport to Key West from $85

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 5/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

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
7:27 pm - 11:27 am
IAD
-
EYW
16h 00m
1 stop
Multiple Airlines Logo
12:07 pm - 6:42 pm
EYW
-
IAD
6h 35m
1 stop
$313Multiple Airlines
Sun, May 31 - Fri, Jun 5
American Airlines Logo
3:26 pm - 10:36 pm
IAD
-
EYW
7h 10m
1 stop
American Airlines Logo
3:58 pm - 11:59 pm
EYW
-
IAD
8h 01m
2 stops
$314American Airlines
Sat, May 16 - Wed, May 20
Multiple Airlines Logo
5:30 pm - 10:24 am
IAD
-
EYW
16h 54m
2 stops
Multiple Airlines Logo
6:11 pm - 12:53 pm
EYW
-
IAD
18h 42m
1 stop
$316Multiple Airlines
Sat, Aug 29 - Thu, Sep 3
Multiple Airlines Logo
6:00 pm - 10:24 am
IAD
-
EYW
16h 24m
1 stop
Multiple Airlines Logo
11:46 am - 11:17 pm
EYW
-
IAD
11h 31m
2 stops
$317Multiple Airlines
Sat, Aug 15 - Wed, Aug 19
Multiple Airlines Logo
8:47 pm - 2:35 pm
IAD
-
EYW
17h 48m
2 stops
Multiple Airlines Logo
9:16 pm - 12:53 pm
EYW
-
IAD
15h 37m
1 stop
$318Multiple Airlines
Thu, Jun 4 - Thu, Jun 11
American Airlines Logo
10:27 am - 6:31 pm
IAD
-
EYW
8h 04m
2 stops
American Airlines Logo
1:59 pm - 11:51 pm
EYW
-
IAD
9h 52m
2 stops
$319American Airlines
Tue, Sep 8 - Thu, Sep 17
Multiple Airlines Logo
6:00 pm - 10:24 am
IAD
-
EYW
16h 24m
1 stop
Multiple Airlines Logo
2:44 pm - 3:40 pm
EYW
-
IAD
48h 56m
2 stops
$320Multiple Airlines
Sat, Jul 11 - Sat, Jul 18
Multiple Airlines Logo
12:32 pm - 10:24 am
IAD
-
EYW
21h 52m
1 stop
Multiple Airlines Logo
12:05 pm - 12:53 pm
EYW
-
IAD
24h 48m
1 stop
$322Multiple Airlines
Wed, Jun 24 - Sun, Jun 28
Multiple Airlines Logo
7:27 pm - 11:27 am
IAD
-
EYW
16h 00m
1 stop
Multiple Airlines Logo
9:24 pm - 6:04 pm
EYW
-
IAD
20h 40m
2 stops
$324Multiple Airlines
Sun, May 24 - Sun, May 31
Multiple Airlines Logo
8:25 am - 6:28 pm
IAD
-
EYW
10h 03m
2 stops
Multiple Airlines Logo
1:14 pm - 11:43 am
EYW
-
IAD
22h 29m
1 stop
$326Multiple Airlines
Fri, Jul 17 - Tue, Jul 21

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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
May 16
IAD12:45 pmWashington, D.C. Dulles Intl
7h 04m
1 stop
EYW7:49 pmKey West
May 20
EYW1:22 pmKey West
5h 21m
1 stop
IAD6:43 pmWashington, D.C. Dulles Intl
$334
Delta
Jun 1
IAD6:08 amWashington, D.C. Dulles Intl
4h 45m
1 stop
EYW10:53 amKey West
Jun 6
EYW6:19 pmKey West
6h 32m
1 stop
IAD12:51 amWashington, D.C. Dulles Intl
$356
Delta
May 9
IAD10:53 amWashington, D.C. Dulles Intl
6h 30m
1 stop
EYW5:23 pmKey West
May 14
EYW6:19 pmKey West
6h 32m
1 stop
IAD12:51 amWashington, D.C. Dulles Intl
$359

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

Our best Allegiant Air deals on Washington, D.C. Dulles Intl Airport to Key West flight tickets
Allegiant Air
May 14
IAD2:01 pmWashington, D.C. Dulles Intl
20h 10m
1 stop
EYW10:11 amKey West
May 17
EYW1:57 pmKey West
19h 02m
2 stops
IAD8:59 amWashington, D.C. Dulles Intl
$372
Allegiant Air
Apr 30
IAD2:01 pmWashington, D.C. Dulles Intl
20h 10m
1 stop
EYW10:11 amKey West
May 3
EYW2:09 pmKey West
23h 24m
2 stops
IAD1:33 pmWashington, D.C. Dulles Intl
$383
Allegiant Air
Apr 30
IAD2:01 pmWashington, D.C. Dulles Intl
20h 10m
1 stop
EYW10:11 amKey West
May 3
EYW2:09 pmKey West
23h 24m
2 stops
IAD1:33 pmWashington, D.C. Dulles Intl
$408

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 April 28, 2026.
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

Cheapest round-trip

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sun 5/31

7:27 pm-11:27 am

1 stop16h 00m

Key West

Fri 6/5

12:07 pm-6:42 pm

1 stop6h 35m

$313
Quickest round-trip

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 5/16

3:26 pm-10:36 pm

1 stop7h 10m

Key West

Wed 5/20

3:58 pm-11:59 pm

2 stops8h 01m

$314

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 8/29

5:30 pm-10:24 am

2 stops16h 54m

Key West

Thu 9/3

6:11 pm-12:53 pm

1 stop18h 42m

$316

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 8/15

6:00 pm-10:24 am

1 stop16h 24m

Key West

Wed 8/19

11:46 am-11:17 pm

2 stops11h 31m

$317

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Thu 6/4

8:47 pm-2:35 pm

2 stops17h 48m

Key West

Thu 6/11

9:16 pm-12:53 pm

1 stop15h 37m

$318

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Tue 9/8

10:27 am-6:31 pm

2 stops8h 04m

Key West

Thu 9/17

1:59 pm-11:51 pm

2 stops9h 52m

$319

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sat 7/11

6:00 pm-10:24 am

1 stop16h 24m

Key West

Sat 7/18

2:44 pm-3:40 pm

2 stops48h 56m

$320

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Wed 6/24

12:32 pm-10:24 am

1 stop21h 52m

Key West

Sun 6/28

12:05 pm-12:53 pm

1 stop24h 48m

$322

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Sun 5/24

7:27 pm-11:27 am

1 stop16h 00m

Key West

Sun 5/31

9:24 pm-6:04 pm

2 stops20h 40m

$324

Washington, D.C.Key West

IAD - EYW

IADEYW

Washington, D.C. Dulles Intl

Fri 7/17

8:25 am-6:28 pm

2 stops10h 03m

Key West

Tue 7/21

1:14 pm-11:43 am

1 stop22h 29m

$326

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 typical price of a round-trip flight between Washington, D.C. Dulles Intl Airport and Key West?

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 $328. 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 January is also very affordable. Most momondo users find prices during this month for around $392.

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 $385. 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 $501.

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 $401. 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 morning, with an average ticket price of $462. Departure times in the morning 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 from Washington, D.C. Dulles Intl Airport 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 $470 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 $287 on momondo.

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

You could potentially save up to 23% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to Key West flight.

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

$399

Fastest flight time

3h 27m

Direct flights

None
The best flight deal from Washington, D.C. Dulles Intl Airport to Key West found on momondo in the last 72 hours is $399
The fastest flight from Washington, D.C. Dulles Intl Airport to Key West takes 3h 27m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Key West. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Key West.
Search flight deals

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Key West

  • 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 27m, 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 $248Free CancellationRating
7.9
8,467 reviews
Search Delta flights
United AirlinesPriceFrom $279Free CancellationRating
7.4
9,672 reviews
Search United Airlines flights
American AirlinesPriceFrom $378Free CancellationRating
7.1
11,677 reviews
Search American Airlines flights

  • United Airlines Flights From Washington, D.C. Dulles Intl Airport to Key West

    United Airlines flight deals from Washington, D.C. Dulles Intl Airport to Key West start from $279 round-trip. Over the 3 United Airlines flights for this route in a normal week, average airfare is usually $472 round-trip - but some users have found much cheaper deals with momondo.

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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