IAD - EYW

$85 Find Cheap Flights from Washington Dulles Airport to Key West

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Key West departing on 5/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Key West

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Key West, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Key West, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$313
Typical prices: $629-$434
Multiple Airlines
Sun 5/31Fri 6/5
IAD - EYW • 1 stop
Cheapest one-way
$85
Allegiant Air
Sun 5/10
IAD - EYW • 1 stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
For a smooth departure from IAD, use the AeroTrain.
Upon arrival at EYW, taxis and rideshares are available.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $314 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top layover airports
Cheapest • Avg $404 (round-trip)
Shortest trip • 5h 18m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 30% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
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+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Key West!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Dulles Intl to Key West (IAD-EYW)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Key West that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Key West

Sun, May 31 - Fri, Jun 5
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
Sat, May 16 - Wed, May 20
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, Aug 29 - Thu, Sep 3
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 15 - Wed, Aug 19
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
Thu, Jun 4 - Thu, Jun 11
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
Tue, Sep 8 - Thu, Sep 17
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
Sat, Jul 11 - Sat, Jul 18
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
Mon, Jul 27 - Thu, Jul 30
Multiple Airlines Logo
8:25 am - 6:28 pm
IAD
-
EYW
10h 03m
2 stops
Multiple Airlines Logo
11:04 am - 11:43 am
EYW
-
IAD
24h 39m
1 stop
$322Multiple Airlines
Sun, May 31 - Mon, Jun 8
Multiple Airlines Logo
7:27 pm - 11:27 am
IAD
-
EYW
16h 00m
1 stop
Multiple Airlines Logo
3:25 pm - 12:53 pm
EYW
-
IAD
21h 28m
1 stop
$324Multiple Airlines
Fri, Jul 17 - Tue, Jul 21
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
Booking Insights

KAYAK's insights & trends for Dulles Intl to Key West flights

Get data-powered insights and trends into flights from Dulles Intl to Key West to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to Key West?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. Dulles Intl Airport to Key West departing in May.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Key West?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Key West clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Key West on a Tuesday and more expensive on a Monday. On your return trip to Washington Dulles Airport, you should consider flying back on a Thursday, and avoid Wednesdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Key West, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Key West is July, where tickets cost $328 (return) on average. On the other hand, the most expensive months are October and May, where the average cost of round-trip tickets is $608 and $560 respectively.

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to Key West?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $488 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Key West, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Key West, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Expert advice

Expert advice for your flight from Dulles Intl to Key West

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Paul Rubio

Paul Rubio

Expert on EYW

Travel journalist and photographer Paul Rubio is a Miami native (and current resident), who has lived in nine countries and traveled to 137. He is an expert in luxury travel, eco-travel, loyalty programs, hotels, airports and airlines. He is a contributing editor at AFAR, Condé Nast Traveler, LUXURY Magazine, and Palm Beach Illustrated.

Stefanie Waldek

Stefanie Waldek

Expert on IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Low seasonSeptember
Cheapest flight$85
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly with an average 4% increase in price.
Flight from Washington Dulles Airport to Key West

When to book flights from Dulles Intl to Key West

Are your dates flexible? Find out the best times to travel from Dulles Intl to Key West based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Key West flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Key West was $85 for a one-way ticket and $313 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Key West?

    A passport is not required to fly from Washington Dulles Airport to Key West.

  • Which airlines offer Wi-Fi service onboard planes from Washington Dulles Airport to Key West?

    American Airlines, and JetBlue offer inflight Wi-Fi service on the Washington Dulles Airport to Key West flight route.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Key West?

    The Embraer 175 (Enhanced Winglets) is the aircraft model that flies most regularly on the Washington Dulles Airport to Key West flight route.

  • Which airline alliances offer flights from Washington Dulles Airport to Key West?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Washington Dulles Airport and Key West, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Washington, D.C. to Key West, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Key West are Delta and United Airlines. With an average price for the route of $497 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $472 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Key West?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Key West.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Key West?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Key West from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Key West?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Key West with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and EYW can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Key West?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Key West from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Key West

  • Looking for a cheap flight? 25% of our users found flights on this route for $399 or less round-trip.

Reviews of the top 3 airlines serving from Dulles Intl to Key West

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Key West. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Key West? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8465 reviews
7.2Food
7.9Comfort
8.1Boarding
8.5Crew
7.8Entertainment
Airline reviews

The gentleman at the gate I think his name is RIE was exceptional

10.0 ExcellentGireesh, Apr 2026
DCA - DTW
Read more Delta reviews

The gentleman at the gate I think his name is RIE was exceptional

Overall Good! The weather delayed our takeoff from Atlanta and our arrival in Miami! If Mother Nature can mess up a flight she will do it every time!

N Everything was perfect from boarding to assistance to baggage in Tampa

Snacks and included beverages were appreciated. Boarding went smoothly. Plenty of overhead bin space. Seats get very uncomfortable after a couple of hours. After waiting 10 painful minutes for my walker, a very nice Delta guest agent pushed me in a wheelchair to the gate. It was finally delivered to me after another 15 minutes . Our checked bag was on the carousel long b4 I was able to retrieve it. Fortunately it was still there but somewhere along the way the straps we used to secure it were removed and and were not reattached. Wish I had made note of the agents name.

The whole experience was excellent. As it most often is with Delta

We waited an hour on the runway to get a gate in Orlando

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The staff on board and gate was nice - a welcome change from the usual. We also arrived early, which was a great benefit, given that it takes 30 minutes plus to get bags at SRQ.

They took all carry-on luggage from Groups 6 -9 - I was group 5 and waiting in line to board - they made me check my luggage too. That then went to baggage claim and delayed departure from the airport. There was overhead room in my seating area - Delta over reacted. Also, had a gentleman next to me that took up 1/2 my seat.

Sorry I didn't realize I was writing a review for each leg. Please see my previous review - it applies to the entire flight, not just a single leg.

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

Overall a good experience, however Wifi was not working on the flight.

THe flight was an hour late. You got us on the plan and we sat on the ground for 45 minutes with no information from the pilot whatsoever. Worst flight this year.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Human interaction. Thought there would be more service-even a smile would have been nice.

Incoming flight was delayed, delaying boarding. It then took 30 mins to take off. Took 20 mins to get to a gate because they changed the gate last minute, crew weren’t ready so there was no one staffed to work the jet bridge. Boarding was so disorganized as is usual with American because everyone just stands around the gate regardless of boarding group.

Delays with no explanation. It could have been handled better.

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

This was one of the most frustrating travel experiences I've had to date. I had changed my flight day of to this one as it was slated to depart on time. It ended up being so delayed that my original flight took off before this one did. The boarding process began but eventually stopped and everyone had to get off the plane as a problem was identified. The person at the front desk just tried to laugh it off as if this wasn't already a huge inconvenience. From there, we eventually got to board only to sit at the gate for an additional hour because of some additional issue. This was extremely frustrating and caused a lot of stress.

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

Everything you need to know for your flight from Dulles Intl to Key West

Information on your arrival and departure airports