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Washington, D.C.

$43+ 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — WAS
Mar 8 — Mar 151
Sun 3/8
Sun 3/15
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 September, booked 39 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 February 6, 2026.

This Super.com deal was found by Cheapflights users on 2/3. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/275:05 am
MIA
-
BWI
Nonstop2h 44m
Frontier
Sun 3/18:45 pm
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 2/3$71
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/268:00 am
MIA
-
BWI
Nonstop2h 51m
Frontier
Sun 3/18:45 pm
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 2/3$72
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/275:05 am
MIA
-
BWI
Nonstop2h 44m
Frontier
Mon 3/28:54 am
BWI
-
MIA
Nonstop2h 56m
Frontier
Deal found 2/3$73
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 2/205:05 am
MIA
-
BWI
Nonstop2h 44m
Frontier
Sun 3/18:45 pm
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 2/4$79
This Expedia deal was found by Cheapflights users on 2/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/198:00 am
MIA
-
BWI
Nonstop2h 51m
Frontier
Mon 2/238:54 am
BWI
-
MIA
Nonstop2h 56m
Frontier
Deal found 2/2$80
This Kiwi.com deal was found by Cheapflights users on 2/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/58:00 am
MIA
-
BWI
Nonstop2h 51m
Frontier
Thu 3/59:13 pm
BWI
-
MIA
Nonstop2h 53m
Frontier
Deal found 2/6$84
This Frontier deal was found by Cheapflights users on 2/2. 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.
Thu 3/125:01 am
MIA
-
BWI
Nonstop2h 44m
Frontier
Sun 3/158:30 am
BWI
-
MIA
Nonstop2h 56m
Frontier
Deal found 2/2$85
This Frontier deal was found by Cheapflights users on 2/2. 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.
Thu 3/125:01 am
MIA
-
BWI
Nonstop2h 44m
Frontier
Sat 3/219:01 pm
BWI
-
MIA
Nonstop2h 53m
Frontier
Deal found 2/2$86
This Super.com deal was found by Cheapflights users on 2/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/205:05 am
MIA
-
BWI
Nonstop2h 44m
Frontier
Sun 2/228:54 pm
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 2/6$87
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/198:00 am
MIA
-
BWI
Nonstop2h 51m
Frontier
Sun 2/228:54 pm
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 2/3$88
This Travelocity deal was found by Cheapflights users on 2/4. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:05 am
MIA
-
BWI
Nonstop2h 44m
Frontier
Sun 2/158:54 pm
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 2/4$89
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:15 am
MIA
-
BWI
Nonstop2h 51m
Multiple Airlines
Wed 3/46:00 am
BWI
-
MIA
1 stop6h 16m
Multiple Airlines
Deal found 2/3$90

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 February 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$71
(Super.com)

One-way from

$43
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$137
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. 3% potential increase in price ($7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($2 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 6, 2026.
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 4/15

7:20 am-9:55 am

Nonstop2h 35m

Baltimore/Washington

Thu 4/16

8:20 pm-11:00 pm

Nonstop2h 40m

$87

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Wed 4/29

12:35 pm-3:20 pm

Nonstop2h 45m

Baltimore/Washington

Mon 5/4

8:20 pm-11:00 pm

Nonstop2h 40m

$87

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Wed 4/8

12:35 pm-3:20 pm

Nonstop2h 45m

Baltimore/Washington

Wed 5/6

6:30 pm-9:10 pm

Nonstop2h 40m

$87

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Thu 2/19

5:05 am-12:31 am

1 stop19h 26m

Baltimore/Washington

Sun 2/22

8:54 pm-11:48 pm

Nonstop2h 54m

$118

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Thu 4/30

11:20 am-2:01 pm

Nonstop2h 41m

Washington, D.C. Reagan-National

Sun 5/3

3:00 pm-5:40 pm

Nonstop2h 40m

$127

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Thu 2/26

9:53 pm-10:27 am

1 stop12h 34m

Baltimore/Washington

Sun 3/1

8:45 pm-11:39 pm

Nonstop2h 54m

$128

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 3/6

5:01 am-7:45 am

Nonstop2h 44m

Baltimore/Washington

Sun 3/8

6:05 am-5:53 pm

1 stop11h 48m

$133

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 3/5

6:34 pm-9:24 pm

Nonstop2h 50m

Washington, D.C. Dulles Intl

Tue 3/10

8:25 am-11:26 am

Nonstop3h 01m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Tue 3/3

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Sun 3/8

1:45 pm-4:37 pm

Nonstop2h 52m

$137

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Fri 2/27

11:21 am-2:00 pm

Nonstop2h 39m

Washington, D.C. Reagan-National

Mon 3/2

2:00 pm-4:49 pm

Nonstop2h 49m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

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 January 30, 2026.

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 39 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 February 6, 2026.

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 51% 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 January 31, 2026.

Travelers seeking maximum savings on their Key Largo to Washington, D.C. flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday 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 February 6, 2026.

The most flights from KE9 to WAS are scheduled on a Friday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 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 February 6, 2026.
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
8,162 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.5

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
8,162 reviews
Delta
7.9
Good
8,162 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.5

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
9,245 reviews
Delta
7.9
Good
8,162 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.5

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
11,247 reviews
Delta
7.9
Good
8,162 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.5

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
8,421 reviews
Delta
7.9
Good
8,162 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.5

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
5.7
Fair
3,054 reviews
Delta
7.9
Good
8,162 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.5

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 35m. Fly via Southwest, Frontier, or Delta to get the fastest option. Key Largo and Washington, D.C. are separated by a distance of 947 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 Frontier, which is currently one of the cheapest options available, starting at $34. Spirit Airlines 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. 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 Volaris (94%), United Airlines (84%) and Frontier (83%).

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

    The cheapest flight price from Key Largo to Washington, D.C. is $54. On average you can expect to pay $258. The most popular route, (Miami - Washington, D.C. Dulles Intl), can usually be booked for $91.

  • 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
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Upper Marlboro
Manassas
Largo
Bowie
McLean
Clinton

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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 February 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$19Average$122FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$43Average$132FlexibilityNo cancel feeOn-time65%
DeltaCheapest$73Average$282FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$85Average$191FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$110Average$261FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$117Average$249FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$127Average$283FlexibilityNo cancel feeOn-time71%

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