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Washington, D.C.

$64+ Cheap flights from Key Largo, FL to Washington, D.C. (WAS)

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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — WAS
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Washington, D.C. are usually found in February or August, booked 79 days in advance, depart on a Friday or Thursday and return on a Monday

Cheap flight deals from Key Largo to Washington, D.C.

Keep the following information in mind while searching for Key Largo to Washington, D.C. flight deals. Data was last updated July 3, 2025.

Round-trip from

$79
(Frontier)

One-way from

$64
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$175
From Key Largo to Washington, D.C. (WAS)
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One-way flight from Key Largo to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 13% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Key Largo to Washington, D.C.

Cheapest flights from Key Largo to Washington, D.C.
Explore the most affordable flight options available from Key Largo to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Frontier deal was found by Cheapflights users on 7/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/163:54 pmMIA - BWI
Nonstop2h 53mFrontier
Wed 7/237:42 pmBWI - MIA
Nonstop2h 52mFrontier
Deal found 7/2$79
This Justfly.com deal was found by Cheapflights users on 7/1. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3112:46 pmMIA - BWI
Nonstop2h 39mMultiple Airlines
Mon 8/47:37 pmBWI - MIA
Nonstop2h 52mMultiple Airlines
Deal found 7/1$81
This CheapOair deal was found by Cheapflights users on 7/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/116:35 pmMIA - IAD
Nonstop2h 38mFrontier
Sun 7/139:58 pmIAD - MIA
Nonstop2h 47mFrontier
Deal found 7/2$109
This Mytrip deal was found by Cheapflights users on 7/1. 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 7/1012:46 pmMIA - BWI
Nonstop2h 39mSpirit Airlines
Sun 7/139:39 amBWI - MIA
1 stop7h 14mSpirit Airlines
Deal found 7/1$125
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/76:00 amMIA - DCA
1 stop10h 59mFrontier
Mon 8/116:00 pmDCA - MIA
1 stop12h 30mFrontier
Deal found 7/2$136
This Delta deal was found by Cheapflights users on 7/2. 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.
Tue 9/911:22 amMIA - DCA
Nonstop2h 42mDelta
Wed 9/102:59 pmDCA - MIA
Nonstop2h 46mDelta
Deal found 7/2$147
This American Airlines deal was found by Cheapflights users on 7/2. 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.
Fri 8/112:04 pmMIA - DCA
Nonstop2h 44mAmerican Airlines
Mon 8/41:44 pmDCA - MIA
Nonstop2h 44mAmerican Airlines
Deal found 7/2$158
This Southwest deal was found by Cheapflights users on 7/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/37:45 amMIA - DCA
1 stop6h 40mSouthwest
Thu 9/41:30 pmDCA - MIA
1 stop9h 35mSouthwest
Deal found 7/3$172

Cheapflights Fare Finder

Customize your flight search to find flights from Key Largo to Washington, D.C. 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 July 3, 2025.
Use the filters below to find and compare flights from Key Largo to Washington, D.C. that are best for you.

Fly from

Key Largo

Fly to

Washington, D.C.

Route

Depart

Return

Price

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Wed 7/16

3:54 pm-6:47 pm

Nonstop2h 53m

Baltimore/Washington

Wed 7/23

7:42 pm-10:34 pm

Nonstop2h 52m

$79

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Thu 7/31

12:46 pm-3:25 pm

Nonstop2h 39m

Baltimore/Washington

Mon 8/4

7:37 pm-10:29 pm

Nonstop2h 52m

$81

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Sat 8/16

9:29 pm-11:59 pm

Nonstop2h 30m

Baltimore/Washington

Sat 8/23

5:30 pm-8:24 pm

Nonstop2h 54m

$99

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Fri 7/11

6:35 pm-9:13 pm

Nonstop2h 38m

Washington, D.C. Dulles Intl

Sun 7/13

9:58 pm-12:45 am

Nonstop2h 47m

$109

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Thu 8/7

6:00 am-4:59 pm

1 stop10h 59m

Washington, D.C. Reagan-National

Mon 8/11

6:00 pm-6:30 am

1 stop12h 30m

$136

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Tue 9/9

11:22 am-2:04 pm

Nonstop2h 42m

Washington, D.C. Reagan-National

Wed 9/10

2:59 pm-5:45 pm

Nonstop2h 46m

$147

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Fri 8/1

12:04 pm-2:48 pm

Nonstop2h 44m

Washington, D.C. Reagan-National

Mon 8/4

1:44 pm-4:28 pm

Nonstop2h 44m

$158

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Wed 9/3

7:45 am-2:25 pm

1 stop6h 40m

Washington, D.C. Reagan-National

Thu 9/4

1:30 pm-11:05 pm

1 stop9h 35m

$172

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Mon 10/20

10:40 am-1:18 pm

Nonstop2h 38m

$64

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Tue 7/22

12:20 pm-3:12 pm

Nonstop2h 52m

$65

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 22 results
1
2
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Best time to book a flight from Key Largo to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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.

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Washington, D.C.. Price data was last updated on June 27, 2025.

The price you pay for your flight from Key Largo to Washington, D.C. may vary depending on when you book. For the best chance of a lower fare, look to book 79 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. (average of $309). Flying from Key Largo to Washington, D.C. in July is currently the most expensive (average of $345). 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 WAS?

Find hourly flight availability from Key Largo to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 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. as you normally would.

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

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Washington, D.C.. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Key Largo to Washington, D.C. flight should consider departing on Thursday afternoons 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.

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

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated July 3, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Key Largo to Washington, D.C. to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,916 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Washington, D.C.. 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. one-way?

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $64. Frontier flights start at $65 while deals on American Airlines start at $69 one-way.

  • What are the most popular routes from Key Largo to Washington, D.C.?

    The most popular route from Key Largo to Washington, D.C. is Miami - Washington, D.C. Dulles Intl. You may also consider Miami - Washington, D.C. Reagan-National or Miami - Baltimore/Washington.

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

    The top 3 most reliable airlines when flying from Key Largo to Washington, D.C. are United Airlines (94%), Copa Airlines (82%) and Frontier (52%).

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

    The cheapest flight price from Key Largo to Washington, D.C. is $68. On average you can expect to pay $2,272. The most popular route, (Miami - Washington, D.C. Dulles Intl), can usually be booked for $98.

  • Can I find deals for flights from Key Largo to Washington, D.C. that include hotel bookings?

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

  • How can I find direct flights from Key Largo to Washington, D.C.?

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

  • Can I find deals for business class flights from Key Largo to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Key Largo to Washington, D.C. 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.?

    Currently, August is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. (average of $309). Flying from Key Largo to Washington, D.C. in July is currently the most expensive (average of $345). 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
Woodbridge
Alexandria
Tysons
Silver Spring
Fredericksburg
Linthicum Heights
Gaithersburg
Fairfax
Easton
Towson
Waldorf
Laurel
Falls Church
Rockville
Springfield
National Harbor
Manassas
Dundalk
Bowie

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Top 7 airlines flying from Key Largo to Washington, D.C.

Discover the top 7 airlines that operate flights from Key Largo to Washington, D.C.. 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$43Average$132FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$44Average$141FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$57Average$204FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$238FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$117Average$261FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$123Average$293FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$130Average$309FlexibilityNo cancel feeOn-time71%

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