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Washington, D.C.

$35+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — WAS
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
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 September, 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.

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 December 8, 2025.

This Frontier deal was found by Cheapflights users on 12/6. 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.
Sat 12/132:13 pmMIA - BWI
Nonstop2h 44mFrontier
Mon 12/156:51 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 12/6$60
This Frontier deal was found by Cheapflights users on 12/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:00 amMIA - BWI
Nonstop2h 45mFrontier
Mon 12/156:51 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 12/7$63
This Priceline deal was found by Cheapflights users on 12/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/269:42 pmMIA - BWI
Nonstop2h 51mFrontier
Sat 1/35:37 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 12/7$66
This Priceline deal was found by Cheapflights users on 12/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:45 amMIA - BWI
Nonstop2h 43mFrontier
Mon 1/55:42 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 12/7$76
This Priceline deal was found by Cheapflights users on 12/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:45 amMIA - BWI
Nonstop2h 43mFrontier
Mon 2/28:11 pmBWI - MIA
Nonstop2h 54mFrontier
Deal found 12/7$78
This CheapOair deal was found by Cheapflights users on 12/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:56 pmMIA - BWI
Nonstop2h 52mFrontier
Sat 1/35:37 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 12/8$79
This Kiwi.com deal was found by Cheapflights users on 12/7. 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.
Fri 12/269:42 pmMIA - BWI
Nonstop2h 51mFrontier
Fri 1/25:42 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 12/7$80
This Frontier deal was found by Cheapflights users on 12/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/229:42 pmMIA - BWI
Nonstop2h 51mFrontier
Fri 1/25:42 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 12/7$81
This CheapOair deal was found by Cheapflights users on 12/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:45 amMIA - BWI
Nonstop2h 43mFrontier
Fri 1/25:42 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 12/7$82
This Super.com deal was found by Cheapflights users on 12/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:56 pmMIA - BWI
Nonstop2h 52mFrontier
Sun 1/49:20 amBWI - MIA
Nonstop3h 00mFrontier
Deal found 12/8$93
This eDestinos deal was found by Cheapflights users on 12/7. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:26 pmMIA - IAD
Nonstop2h 39mFrontier
Mon 12/154:00 pmIAD - MIA
Nonstop2h 45mFrontier
Deal found 12/7$93
This Frontier deal was found by Cheapflights users on 12/5. 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.
Mon 12/2210:35 amMIA - IAD
Nonstop2h 39mFrontier
Thu 1/295:37 pmIAD - MIA
1 stop7h 10mFrontier
Deal found 12/5$98

Find 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 December 8, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$61
(Priceline)

One-way from

$35
(eDestinos)

Popular in

December

Cheapest in

February

Average price

$200
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. (WAS)
Search Deals
One-way flight from Key Largo to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 8, 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

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 2/5

5:30 am-4:28 pm

1 stop10h 58m

Washington, D.C. Dulles Intl

Fri 2/6

5:33 pm-12:47 am

1 stop7h 14m

$128

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Fri 1/16

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Mon 2/9

2:30 pm-5:28 pm

Nonstop2h 58m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Fri 1/9

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Mon 1/12

2:35 pm-5:33 pm

Nonstop2h 58m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Thu 2/5

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Sat 2/7

2:55 pm-5:53 pm

Nonstop2h 58m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Sat 2/7

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Tue 2/10

2:30 pm-5:28 pm

Nonstop2h 58m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Tue 2/3

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Sun 2/8

2:30 pm-5:28 pm

Nonstop2h 58m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Thu 1/22

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Sun 1/25

2:30 pm-5:28 pm

Nonstop2h 58m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Fri 1/23

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Mon 1/26

2:30 pm-5:28 pm

Nonstop2h 58m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Wed 2/4

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Sat 2/7

2:55 pm-5:53 pm

Nonstop2h 58m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Thu 1/8

5:20 pm-10:55 pm

1 stop5h 35m

Washington, D.C. Reagan-National

Mon 1/12

11:15 am-9:30 pm

1 stop10h 15m

$162

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 60 results
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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 December 5, 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, December is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. (average of $29). Flying from Key Largo to Washington, D.C. in July is currently the most expensive (average of $84). 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 December 8, 2025.

One of the essential ways to save on airfare from Key Largo to Washington, D.C. is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 52% on airfare.

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 Friday mornings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Key Largo to Washington, D.C.

Explore weekly flight availability from Key Largo to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 8, 2025.

The most flights from KE9 to WAS are scheduled on a Friday (26 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (21 on average).

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 December 8, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American 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.
Delta
7.9
Good
8,011 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
7.9
Good
8,011 reviews
Delta
7.9
Good
8,011 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
United Airlines
7.4
Good
9,078 reviews
Delta
7.9
Good
8,011 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
11,042 reviews
Delta
7.9
Good
8,011 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Spirit Airlines
6.3
Okay
8,166 reviews
Delta
7.9
Good
8,011 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Frontier
5.8
Fair
3,088 reviews
Delta
7.9
Good
8,011 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

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.

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

    There are many flights that can get you from Key Largo to Washington, D.C. in 2h 39m. Fly via Frontier, Delta, or United Airlines to get the fastest option. Key Largo and Washington, D.C. are separated by a distance of 921 mi. This flight may include one or multiple stops.

  • 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 $34. Frontier flights start at $34 while deals on JetBlue start at $58 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. Reagan-National. You may also consider Miami - Washington, D.C. Dulles Intl 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 Frontier (85%), United Airlines (78%) and Copa Airlines (77%).

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

    The cheapest flight price from Key Largo to Washington, D.C. is $29. On average you can expect to pay $359. The most popular route, (Miami - Washington, D.C. Reagan-National), can usually be booked for $137.

  • 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, December is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. (average of $29). Flying from Key Largo to Washington, D.C. in July is currently the most expensive (average of $84). 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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Alternative routes for Key Largo to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$37Average$132FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$56Average$134FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$85Average$206FlexibilityNo cancel feeOn-time62%
DeltaCheapest$103Average$281FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$117Average$272FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$125Average$261FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$127Average$292FlexibilityNo cancel feeOn-time71%

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