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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 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — WAS
Dec 8 — Dec 151
Mon 12/8
Mon 12/15
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 79 days in advance, depart on a Friday or Thursday and return on a Monday

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 November 8, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Wed 12/245:30 amMIA - BWI
1 stop5h 25mFrontier
Wed 12/311:31 pmBWI - MIA
Nonstop2h 51mFrontier
Deal found 11/6$80
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/512:26 pmMIA - IAD
Nonstop2h 39mFrontier
Wed 12/109:00 amIAD - MIA
1 stop7h 28mFrontier
Deal found 11/5$83
This Frontier deal was found by Cheapflights users on 11/5. 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.
Thu 12/47:09 pmMIA - BWI
1 stop5h 15mFrontier
Mon 12/86:51 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 11/5$84
This CheapOair deal was found by Cheapflights users on 11/8. 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.
Sun 12/78:30 amMIA - IAD
Nonstop2h 39mFrontier
Thu 12/117:18 pmIAD - MIA
1 stop5h 28mFrontier
Deal found 11/8$84
This CheapOair deal was found by Cheapflights users on 11/8. 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.
Thu 11/1311:31 amMIA - BWI
Nonstop2h 44mFrontier
Sun 11/163:00 pmBWI - MIA
Nonstop2h 48mFrontier
Deal found 11/8$86
This Kiwi.com deal was found by Cheapflights users on 11/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/212:05 pmMIA - BWI
Nonstop2h 41mFrontier
Mon 11/245:41 pmBWI - MIA
Nonstop2h 49mFrontier
Deal found 11/8$87
This CheapOair deal was found by Cheapflights users on 11/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/232:07 pmMIA - BWI
Nonstop2h 41mFrontier
Sat 1/35:37 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 11/5$89
This American Airlines deal was found by Cheapflights users on 11/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:40 pmMIA - BWI
Nonstop2h 49mAmerican Airlines
Tue 12/166:00 amBWI - MIA
Nonstop2h 49mAmerican Airlines
Deal found 11/6$91
This CheapOair deal was found by Cheapflights users on 11/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/226:05 amMIA - BWI
Nonstop2h 45mFrontier
Mon 12/18:16 pmBWI - MIA
Nonstop2h 46mFrontier
Deal found 11/6$92
This Kiwi.com deal was found by Cheapflights users on 11/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/272:10 pmMIA - BWI
1 stop5h 47mMultiple Airlines
Mon 12/86:51 pmBWI - MIA
Nonstop2h 55mMultiple Airlines
Deal found 11/8$93
This CheapOair deal was found by Cheapflights users on 11/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/812:26 pmMIA - IAD
Nonstop2h 39mFrontier
Sun 12/1412:04 pmIAD - MIA
Nonstop2h 45mFrontier
Deal found 11/5$93
This Frontier deal was found by Cheapflights users on 11/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/145:30 amMIA - BWI
1 stop5h 35mFrontier
Wed 12/311:31 pmBWI - MIA
Nonstop2h 51mFrontier
Deal found 11/8$94

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 November 8, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$80
(Kiwi.com)

One-way from

$43
(CheapOair)

Popular in

December

Cheapest in

February

Average price

$188
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. 12% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 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

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 11/21

2:05 pm-4:46 pm

Nonstop2h 41m

Baltimore/Washington

Mon 11/24

5:41 pm-8:30 pm

Nonstop2h 49m

$88

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Thu 12/4

5:10 pm-7:50 pm

Nonstop2h 40m

Baltimore/Washington

Mon 12/8

6:00 pm-8:45 pm

Nonstop2h 45m

$91

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 12/4

12:50 pm-3:24 pm

Nonstop2h 34m

Washington, D.C. Dulles Intl

Mon 12/8

8:26 am-11:14 am

Nonstop2h 48m

$107

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 12/12

6:00 am-8:35 am

Nonstop2h 35m

Baltimore/Washington

Sun 12/14

3:05 pm-10:05 pm

1 stop7h 00m

$119

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 12/5

9:30 am-7:05 pm

2 stops9h 35m

Baltimore/Washington

Mon 12/8

6:00 pm-8:45 pm

Nonstop2h 45m

$124

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Sat 12/13

6:53 pm-12:24 am

1 stop5h 31m

Baltimore/Washington

Tue 12/16

8:00 am-4:28 pm

1 stop8h 28m

$128

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 1/23

5:35 am-5:47 pm

1 stop12h 12m

Baltimore/Washington

Sun 1/25

11:14 am-10:03 pm

1 stop10h 49m

$129

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 12/4

12:50 pm-3:24 pm

Nonstop2h 34m

Washington, D.C. Dulles Intl

Sun 12/7

8:26 am-11:14 am

Nonstop2h 48m

$131

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Tue 12/16

11:40 am-7:40 pm

1 stop8h 00m

Baltimore/Washington

Thu 1/1

3:55 pm-10:05 pm

1 stop6h 10m

$134

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Thu 12/4

7:40 am-2:15 pm

2 stops6h 35m

Baltimore/Washington

Sun 12/7

9:45 am-6:55 pm

1 stop9h 10m

$136

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/7

Showing 1-10 of 58 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 October 31, 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, September is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. (average of $37). 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 November 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. Sunday evenings 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 November 8, 2025.

The most flights from KE9 to WAS are scheduled on a Friday (23 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (18 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 November 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
8,002 reviews

Boarding

8.2

Comfort

7.9

Overall

7.9

Crew

8.5

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
8,002 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Comfort

7.9

Overall

7.9

Crew

8.5

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
9,014 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Comfort

7.9

Overall

7.9

Crew

8.5

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
11,049 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Comfort

7.9

Overall

7.9

Crew

8.5

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
8,132 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Comfort

7.9

Overall

7.9

Crew

8.5

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
3,111 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Comfort

7.9

Overall

7.9

Crew

8.5

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 34m. Fly via Frontier, Southwest, or United Airlines to get the fastest option. Key Largo and Washington, D.C. are separated by a distance of 923 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 Southwest, which is currently one of the cheapest options available, starting at $56. United Airlines flights start at $63 while deals on Delta start at $66 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 Copa Airlines (92%), United Airlines (88%) and Frontier (85%).

  • 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 $596. The most popular route, (Miami - Washington, D.C. Dulles Intl), can usually be booked for $57.

  • 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, September is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. (average of $37). 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
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Waldorf
Bowie
Largo
McLean

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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 November 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$37Average$131FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$56Average$136FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$88Average$221FlexibilityNo cancel feeOn-time62%
DeltaCheapest$103Average$275FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$117Average$279FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$126Average$259FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$127Average$315FlexibilityNo cancel feeOn-time71%

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