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Dulles Intl

$84+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — IAD
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 February or September, booked 71 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$167
(United Airlines)

One-way from

$84
(United Airlines)

Popular in

August

Cheapest in

February

Average price

$296
Provider with most accurate pricing for Miami-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Miami-Washington, D.C. (WAS) flights.
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From Key Largo to Washington, D.C. Dulles Intl
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One-way flight from Key Largo to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 4% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find 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 March 28, 2025.

This United Airlines deal was found by Cheapflights users on 3/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/51:21 pmMIA - IAD
Nonstop2h 40mUnited Airlines
Mon 6/98:55 amIAD - MIA
Nonstop2h 49mUnited Airlines
Deal found 3/26$167
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2412:12 pmMIA - IAD
Nonstop2h 41mFrontier
Sat 6/213:55 pmIAD - MIA
Nonstop2h 40mFrontier
Deal found 3/27$178
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/245:11 pmMIA - IAD
1 stop6h 45mAmerican Airlines
Sun 4/275:00 amIAD - MIA
1 stop4h 13mAmerican Airlines
Deal found 3/27$256
This Mytrip deal was found by Cheapflights users on 3/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1511:40 amMIA - IAD
2 stops33h 17mMultiple Airlines
Sun 5/1812:55 pmIAD - MIA
3 stops31h 03mMultiple Airlines
Deal found 3/26$272
This Mytrip deal was found by Cheapflights users on 3/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/171:23 pmMIA - IAD
1 stop22h 00mSun Country Air
Sun 4/207:30 amIAD - MIA
1 stop27h 12mSun Country Air
Deal found 3/27$307
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/177:00 amMIA - IAD
1 stop4h 23mDelta
Sat 4/198:33 pmIAD - MIA
1 stop17h 50mDelta
Deal found 3/27$339

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 March 28, 2025.
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

Key Largo

Fly to

Dulles Intl

Route

Depart

Return

Price

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 6/5

1:21 pm-4:01 pm

Nonstop2h 40m

Washington, D.C. Dulles Intl

Mon 6/9

8:55 am-11:44 am

Nonstop2h 49m

$167

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Sat 5/24

12:12 pm-2:53 pm

Nonstop2h 41m

Washington, D.C. Dulles Intl

Sat 6/21

3:55 pm-6:35 pm

Nonstop2h 40m

$178

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 4/24

5:11 pm-11:56 pm

1 stop6h 45m

Washington, D.C. Dulles Intl

Sun 4/27

5:00 am-9:13 am

1 stop4h 13m

$256

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 5/15

11:40 am-8:57 pm

2 stops33h 17m

Washington, D.C. Dulles Intl

Sun 5/18

12:55 pm-7:58 pm

3 stops31h 03m

$272

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 4/17

1:23 pm-11:23 am

1 stop22h 00m

Washington, D.C. Dulles Intl

Sun 4/20

7:30 am-10:42 am

1 stop27h 12m

$307

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 4/17

7:00 am-11:23 am

1 stop4h 23m

Washington, D.C. Dulles Intl

Sat 4/19

8:33 pm-2:23 pm

1 stop17h 50m

$339

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Wed 5/7

1:29 pm-4:10 pm

Nonstop2h 41m

$84

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Tue 6/17

12:30 pm-3:10 pm

Nonstop2h 40m

$88

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Wed 7/2

3:08 pm-7:44 pm

1 stop4h 36m

$130

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 4/17

1:23 pm-11:23 am

1 stop22h 00m

$144

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 12 results
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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

How far ahead should I book a flight from Key Largo to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Dulles Intl. Price data was last updated on March 21, 2025.

Booking 71 days in advance of your planned departure date is, on average, the best time to get cheap flights from Key Largo to Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Key Largo to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Key Largo to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $385). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 March 28, 2025.

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.

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

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Dulles Intl. Price data was last updated on February 16, 2025.

Travelers seeking maximum savings on their Key Largo to Washington, D.C. Dulles Intl Airport flight should consider departing on Friday mornings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 March 28, 2025.
See what other customers who have flown with Delta, United Airlines and American Airlines from Key Largo to Washington, D.C. have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Delta
8.0
Very good
7,896 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
United Airlines
7.4
Good
8,603 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Sun Country Air
6.9
Okay
348 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Frontier
6.0
Okay
3,271 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

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.

  • 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 United Airlines, which is currently one of the cheapest options available, starting at $84. Frontier flights start at $88 while deals on American Airlines start at $130 one-way.

  • 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 $1,444, our data shows the cheapest flight currently is $48. When looking at the most popular route, (Miami - Washington, D.C. Dulles Intl), you can expect to pay $167 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.

  • What is the cheapest month to book a flight from Key Largo to Washington, D.C. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Key Largo to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $385). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Key Largo?

Book flights to Key Largo if you plan to visit one of these locations
Arlington
Alexandria
Fairfax
Tysons
Springfield
Rockville
Woodbridge
Gaithersburg
Fredericksburg
Linthicum Heights
Silver Spring
Falls Church
Laurel
Easton
Herndon
Sterling
Bowie
Gettysburg
National Harbor
Oxon Hill

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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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Valdosta to Dulles Intl flights

Top 6 airlines flying from Key Largo to Dulles Intl

Discover the top 6 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$44Average$142FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$57Average$186FlexibilityNo cancel feeOn-time62%
FrontierCheapest$61Average$123FlexibilityNo cancel feeOn-time62%
DeltaCheapest$127Average$287FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$144Average$280FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$197Average$311FlexibilityNo cancel feeOn-time71%
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