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Dulles Intl

$87+ Cheap flights from Key Largo, FL to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/30. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — IAD
มิ.ย. 10 — มิ.ย. 171
พ. 6/10
พ. 6/17
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Washington, D.C. Dulles Intl are usually found in November or January, booked 20 days in advance, depart on a Friday or Thursday and return on a Monday

Cheap flight deals from Key Largo to Dulles Intl

Cheapest flights from Key Largo to Dulles Intl
Explore the most affordable flight options available from Key Largo to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on พฤษภาคม 11, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พ. 7/15:26 pm
MIA
-
IAD
1 stop5h 51m
Frontier
อ. 7/711:17 am
IAD
-
MIA
1 stop5h 16m
Frontier
Deal found 5/7$124
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พ. 6/38:10 am
MIA
-
IAD
1 stop9h 17m
Frontier
พ. 6/107:35 am
IAD
-
MIA
1 stop6h 14m
Frontier
Deal found 5/10$125
This Kiwi.com deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พ. 6/38:10 am
MIA
-
IAD
1 stop9h 17m
Frontier
อ. 6/911:17 am
IAD
-
MIA
1 stop5h 14m
Frontier
Deal found 5/8$126
This Kiwi.com deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พฤ. 5/288:10 am
MIA
-
IAD
1 stop8h 11m
Frontier
พฤ. 8/67:49 am
IAD
-
MIA
1 stop8h 44m
Frontier
Deal found 5/7$127
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พ. 5/275:22 pm
MIA
-
IAD
1 stop5h 47m
Frontier
อ. 6/211:07 am
IAD
-
MIA
1 stop11h 40m
Frontier
Deal found 5/10$129
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พฤ. 5/285:22 pm
MIA
-
IAD
1 stop5h 47m
Frontier
อ. 6/27:45 am
IAD
-
MIA
1 stop5h 35m
Frontier
Deal found 5/10$133
This Kiwi.com deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พ. 6/38:10 am
MIA
-
IAD
1 stop9h 17m
Frontier
ส. 6/611:07 am
IAD
-
MIA
1 stop11h 40m
Frontier
Deal found 5/9$139
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พฤ. 5/288:10 am
MIA
-
IAD
1 stop8h 11m
Frontier
จ. 6/111:07 am
IAD
-
MIA
1 stop5h 20m
Frontier
Deal found 5/10$144
This Kiwi.com deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ศ. 7/248:30 am
MIA
-
IAD
1 stop8h 55m
Frontier
จ. 7/2711:17 am
IAD
-
MIA
1 stop5h 16m
Frontier
Deal found 5/8$153
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พ. 6/248:30 am
MIA
-
IAD
1 stop9h 01m
Frontier
พ. 7/111:17 am
IAD
-
MIA
1 stop5h 14m
Frontier
Deal found 5/10$154

Find flight deals from Key Largo to Dulles Intl

Keep the following information in mind while searching for Key Largo to Dulles Intl flight deals. Data was last updated พฤษภาคม 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$124
(Kiwi.com)

One-way from

$87
(Super.com)

Popular in

May

Cheapest in

November

Average price

$250
Provider with most accurate pricing for Miami-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Washington, D.C. (WAS) flights.
Search Deals
From Key Largo to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Key Largo to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Dulles Intl 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, Cheapflights users made 2,558,603 searches. Data last updated พฤษภาคม 11, 2026.
Use the filters below to find and compare flights from Key Largo to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

ศ. 5/22

5:22 pm-11:19 pm

1 stop5h 57m

Washington, D.C. Dulles Intl

อา. 5/24

8:45 am-11:35 am

Nonstop2h 50m

$241

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

พฤ. 6/11

1:10 pm-3:53 pm

Nonstop2h 43m

Washington, D.C. Dulles Intl

พ. 6/17

6:33 am-2:38 pm

1 stop8h 05m

$283

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

พ. 7/8

1:10 pm-3:53 pm

Nonstop2h 43m

Washington, D.C. Dulles Intl

ส. 7/11

8:45 am-11:35 am

Nonstop2h 50m

$283

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

ส. 7/4

6:00 am-12:02 pm

1 stop6h 02m

Washington, D.C. Dulles Intl

ศ. 7/17

7:26 pm-12:55 am

1 stop5h 29m

$314

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

พฤ. 10/29

7:30 pm-12:05 am

1 stop4h 35m

Washington, D.C. Dulles Intl

อา. 11/1

7:50 pm-12:52 am

1 stop5h 02m

$314

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

ศ. 7/24

1:10 pm-3:53 pm

Nonstop2h 43m

Washington, D.C. Dulles Intl

จ. 7/27

8:45 am-11:35 am

Nonstop2h 50m

$320

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

พฤ. 5/21

5:22 pm-11:19 pm

1 stop5h 57m

Washington, D.C. Dulles Intl

อา. 5/24

8:45 am-11:35 am

Nonstop2h 50m

$360

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

พฤ. 7/2

5:22 pm-11:19 pm

1 stop5h 57m

Washington, D.C. Dulles Intl

อา. 7/5

8:45 am-11:35 am

Nonstop2h 50m

$373

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

พ. 6/10

8:48 am-4:32 pm

1 stop7h 44m

Washington, D.C. Dulles Intl

จ. 6/15

8:45 am-11:35 am

Nonstop2h 50m

$375
Quickest round-trip

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

ศ. 9/4

1:44 pm-4:17 pm

Nonstop2h 33m

Washington, D.C. Dulles Intl

อ. 9/8

8:15 am-11:09 am

Nonstop2h 54m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/7

Showing 1-10 of 23 resultsSorted by cheapest first
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3

Best time to book a flight from Key Largo to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Key Largo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Key Largo to Washington, D.C. Dulles Intl Airport

What is the cheapest time of day to fly from KE9 to IAD?

Find hourly flight availability from Key Largo to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated พฤษภาคม 11, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Key Largo to Washington, D.C. Dulles Intl Airport as you normally would.

How much does it cost to fly round-trip from Key Largo to Washington, D.C. Dulles Intl Airport?

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated พฤษภาคม 11, 2026.
Read through reviews of airlines operating flights from Key Largo to Washington, D.C. Dulles Intl Airport, such as United Airlines,American Airlines, andFrontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,701 reviews

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,701 reviews
United Airlines
7.4
Good
9,701 reviews

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
American Airlines
7.1
Good
11,664 reviews
United Airlines
7.4
Good
9,701 reviews

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Frontier
5.6
Fair
2,951 reviews
United Airlines
7.4
Good
9,701 reviews

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Key Largo to Washington, D.C. Dulles Intl Airport?

    Departing from Key Largo to Washington, D.C. Dulles Intl Airport will take you 5h 57m. Airlines will cover a distance of 923 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Key Largo to Washington, D.C. Dulles Intl Airport one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $35. Spirit Airlines flights start at $46 while deals on United Airlines start at $78 one-way.

  • What are the most reliable airlines from Key Largo to Washington, D.C. Dulles Intl Airport?

    No one likes to see their flight delayed. When booking a flight from Key Largo to Washington, D.C. Dulles Intl Airport consider choosing United Airlines (91%), Copa Airlines (87%) or Frontier (75%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Key Largo to Washington, D.C. Dulles Intl Airport?

    While on average a flight from Key Largo to Washington, D.C. Dulles Intl Airport is generally $745, our data shows the cheapest flight currently is $96. When looking at the most popular route, (Miami - Washington, D.C. Dulles Intl), you can expect to pay $210 for that flight.

  • Can I find deals for flights from Key Largo to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Key Largo to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key Largo to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key Largo to Dulles Intl.

  • Can I find deals for business class flights from Key Largo to Dulles Intl?

    Yes. Cheapflights offers flight deals from Key Largo to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Tysons
Owings Mills
Springfield
Arlington
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Silver Spring
Hanover
Laurel
Woodbridge
Waldorf
Largo
Clinton
Hunt Valley
Cordova
Reston

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Key Largo to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Orlando to Baltimore flights
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Tampa to Baltimore flights
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Orlando to Reagan-National flights
Miami to Reagan-National flights
Fort Lauderdale to Reagan-National flights
Jacksonville to Baltimore flights
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Jacksonville to Dulles Intl flights
West Palm Beach to Reagan-National flights
Jacksonville to Reagan-National flights
West Palm Beach to Baltimore flights
Fort Myers to Baltimore flights
Sarasota to Reagan-National flights
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Pensacola to Reagan-National flights
Pensacola to Dulles Intl flights
Sarasota to Baltimore flights
Fort Myers to Reagan-National flights
Pensacola to Baltimore flights
Valparaiso to Dulles Intl flights
Tallahassee to Reagan-National flights
Valparaiso to Baltimore flights
Panama City to Dulles Intl flights
Gainesville to Baltimore flights
Tallahassee to Dulles Intl flights
Panama City to Reagan-National flights
Valparaiso to Reagan-National flights
Gainesville to Dulles Intl flights
Gainesville to Reagan-National flights
Sarasota to Dulles Intl flights
Daytona Beach to Dulles Intl flights
Panama City to Baltimore flights
Tallahassee to Baltimore flights
Daytona Beach to Reagan-National flights
Key West to Reagan-National flights
Key West to Dulles Intl flights
Daytona Beach to Baltimore flights
Melbourne to Dulles Intl flights
Key West to Baltimore flights
Melbourne to Baltimore flights
Melbourne to Reagan-National flights
Valdosta to Baltimore flights
Valdosta to Dulles Intl flights

Top 5 airlines flying from Key Largo to Dulles Intl

Discover the top 5 airlines that operate flights from Key Largo to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated พฤษภาคม 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$37Average$123FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$85Average$172FlexibilityNo cancel feeOn-time62%
DeltaCheapest$108Average$227FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$117Average$240FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$250Average$365FlexibilityNo cancel feeOn-time71%

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