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Washington, D.C.

$55+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — WAS
Sep 1 — Sep 81
Tue 9/1
Tue 9/8
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Washington, D.C. are usually found in January or September, booked 58 days in advance, depart on a Friday or Thursday and return on a Saturday

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 August 2, 2026.

This Mytrip deal was found by Cheapflights users on 7/30. 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.
Sun 9/137:23 am
MIA
-
BWI
Nonstop2h 40m
Frontier
Sun 9/2010:48 am
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 7/30$109
This Frontier deal was found by Cheapflights users on 7/30. 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 8/275:08 pm
MIA
-
BWI
Nonstop2h 55m
Frontier
Mon 8/318:48 pm
BWI
-
MIA
Nonstop2h 53m
Frontier
Deal found 7/30$113
This Mytrip deal was found by Cheapflights users on 7/29. 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.
Wed 8/265:08 pm
MIA
-
BWI
Nonstop2h 55m
Frontier
Mon 8/318:48 pm
BWI
-
MIA
Nonstop2h 53m
Frontier
Deal found 7/29$114
This Frontier deal was found by Cheapflights users on 7/30. 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 8/298:10 am
MIA
-
BWI
1 stop9h 33m
Frontier
Sat 8/298:48 pm
BWI
-
MIA
Nonstop2h 53m
Frontier
Deal found 7/30$118
This Frontier deal was found by Cheapflights users on 7/30. 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 10/37:23 am
MIA
-
BWI
Nonstop2h 40m
Frontier
Sun 10/410:48 am
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 7/30$119
This Frontier deal was found by Cheapflights users on 7/30. 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 9/119:30 pm
MIA
-
BWI
1 stop19h 16m
Frontier
Sun 9/1310:48 am
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 7/30$120
This Frontier deal was found by Cheapflights users on 7/28. 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 9/107:23 am
MIA
-
BWI
Nonstop2h 40m
Frontier
Mon 9/2110:48 am
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 7/28$123
This Frontier deal was found by Cheapflights users on 7/28. 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 9/127:23 am
MIA
-
BWI
Nonstop2h 40m
Frontier
Mon 9/2810:48 am
BWI
-
MIA
Nonstop2h 54m
Frontier
Deal found 7/28$124
This Priceline deal was found by Cheapflights users on 7/28. 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 8/255:08 pm
MIA
-
BWI
Nonstop2h 55m
Frontier
Tue 9/18:48 pm
BWI
-
MIA
Nonstop2h 53m
Frontier
Deal found 7/28$125
This Super.com deal was found by Cheapflights users on 8/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:08 pm
MIA
-
BWI
Nonstop2h 55m
Frontier
Wed 9/28:48 pm
BWI
-
MIA
Nonstop2h 53m
Frontier
Deal found 8/2$126
This deal was found by Cheapflights users on 7/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:17 pm
MIA
-
IAD
1 stop5h 11m
Frontier
Fri 10/307:00 am
IAD
-
MIA
1 stop5h 05m
Frontier
Deal found 7/31$128
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Tue 8/185:28 pm
MIA
-
IAD
1 stop23h 46m
Frontier
Sat 9/57:00 am
IAD
-
MIA
1 stop13h 29m
Frontier
Deal found 7/31$157

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 August 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$109
(Mytrip)

One-way from

$55
(Frontier)

Popular in

March

Cheapest in

January

Average price

$167
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. 9% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 2, 2026.
Use the filters below to find and compare flights from Key Largo to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Tue 9/1

1:44 pm-4:17 pm

Nonstop2h 33m

Washington, D.C. Dulles Intl

Sat 9/5

8:16 am-11:11 am

Nonstop2h 55m

$199

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Wed 10/7

1:26 pm-3:59 pm

Nonstop2h 33m

Washington, D.C. Dulles Intl

Wed 10/14

8:25 am-11:20 am

Nonstop2h 55m

$208

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Sat 9/19

6:30 am-9:00 am

Nonstop2h 30m

Baltimore/Washington

Mon 9/21

8:20 am-11:05 am

Nonstop2h 45m

$217

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Thu 9/24

5:05 pm-7:45 pm

Nonstop2h 40m

Baltimore/Washington

Mon 9/28

8:20 am-11:05 am

Nonstop2h 45m

$217

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Wed 9/2

11:22 am-2:05 pm

Nonstop2h 43m

Washington, D.C. Reagan-National

Mon 9/14

6:30 pm-12:55 am

1 stop6h 25m

$218

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Tue 9/15

11:29 am-5:46 pm

1 stop6h 17m

Washington, D.C. Dulles Intl

Tue 9/22

8:08 am-1:05 pm

1 stop4h 57m

$219

MiamiWashington, D.C.

MIA - DCA

MIADCA

Miami

Mon 9/21

11:15 am-1:49 pm

Nonstop2h 34m

Washington, D.C. Reagan-National

Mon 9/28

8:00 am-1:05 pm

1 stop5h 05m

$227

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 9/10

6:00 am-11:30 am

1 stop5h 30m

Washington, D.C. Dulles Intl

Tue 9/15

8:08 am-3:30 pm

1 stop7h 22m

$228

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Tue 9/15

4:05 pm-6:40 pm

Nonstop2h 35m

Baltimore/Washington

Tue 9/22

8:10 am-10:55 am

Nonstop2h 45m

$235

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Wed 9/23

11:50 am-2:25 pm

Nonstop2h 35m

Baltimore/Washington

Thu 9/24

6:15 pm-9:05 pm

Nonstop2h 50m

$235

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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.

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 August 2, 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 in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 48% on airfare.

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 August 2, 2026.

The most flights from KE9 to WAS are scheduled on a Friday (25 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 on average).

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

Airfare is below average for this route at the moment.
Key Largo to Washington, D.C. flights typically cost between $141 and $235 in September.
The cheapest round-trip price found within the last 5 days was $109 on Frontier (Sep 13-Sep 20).

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 July 25, 2026.

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

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 August 2, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, andAmerican 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
7.8
Good
8,493 reviews

Boarding

8.1

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Entertainment

7.8

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
7.8
Good
8,493 reviews
Delta
7.8
Good
8,493 reviews

Boarding

8.1

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Entertainment

7.8

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
10,061 reviews
Delta
7.8
Good
8,493 reviews

Boarding

8.1

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Entertainment

7.8

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
7.1
Good
11,846 reviews
Delta
7.8
Good
8,493 reviews

Boarding

8.1

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Entertainment

7.8

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.
JetBlue
7.1
Good
3,030 reviews
Delta
7.8
Good
8,493 reviews

Boarding

8.1

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Entertainment

7.8

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
5.6
Fair
2,741 reviews
Delta
7.8
Good
8,493 reviews

Boarding

8.1

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Entertainment

7.8

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 30m. Fly via United Airlines, Southwest, or Delta to get the fastest option. Key Largo and Washington, D.C. are separated by a distance of 947 mi. All flights are typically nonstop.

  • 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. American Airlines flights start at $76 while deals on Southwest start at $78 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 - Baltimore/Washington or Miami - Washington, D.C. Dulles Intl.

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

    The cheapest flight price from Key Largo to Washington, D.C. is $148. On average you can expect to pay $3,051. The most popular route, (Miami - Washington, D.C. Reagan-National), can usually be booked for $199.

  • 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.

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
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Clinton
Hunt Valley
Cordova
Woodbridge
Largo
Upper Marlboro

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Top 6 airlines flying from Key Largo to Washington, D.C.

Discover the top 6 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 August 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$28Average$131FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$79Average$220FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$117Average$313FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$117Average$242FlexibilityNo cancel feeOn-time69%
DeltaCheapest$125Average$292FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$127Average$323FlexibilityNo cancel feeOn-time71%

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