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Washington, D.C.

$53+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — WAS
Aug 22 — Aug 291
Fri 8/22
Fri 8/29
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 August 17, 2025.

Round-trip from

$65
(Cheapflightsfares)

One-way from

$53
(CheapOair)

Popular in

December

Cheapest in

February

Average price

$156
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 ($26 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 August 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 August 17, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 8/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:48 pmMIA - BWI
Nonstop2h 49mSpirit Airlines
Mon 9/84:51 pmBWI - MIA
Nonstop2h 52mSpirit Airlines
Deal found 8/17$57
This Cheapflightsfares deal was found by Cheapflights users on 8/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/128:48 pmMIA - BWI
Nonstop2h 49mSpirit Airlines
Fri 9/194:51 pmBWI - MIA
Nonstop2h 52mSpirit Airlines
Deal found 8/15$65
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/289:29 pmMIA - BWI
Nonstop2h 30mSpirit Airlines
Sun 8/315:30 pmBWI - MIA
Nonstop2h 54mSpirit Airlines
Deal found 8/15$66
This Cheapflightsfares deal was found by Cheapflights users on 8/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/309:29 pmMIA - BWI
Nonstop2h 30mSpirit Airlines
Sun 8/315:30 pmBWI - MIA
Nonstop2h 54mSpirit Airlines
Deal found 8/15$67
This Cheapflightsfares deal was found by Cheapflights users on 8/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/54:01 pmMIA - BWI
Nonstop2h 49mFrontier
Sat 9/67:48 pmBWI - MIA
Nonstop2h 54mFrontier
Deal found 8/17$68
This Frontier deal was found by Cheapflights users on 8/15. 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 9/54:01 pmMIA - BWI
Nonstop2h 49mFrontier
Mon 9/812:00 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 8/15$70
This Cheapflightsfares deal was found by Cheapflights users on 8/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/44:00 pmMIA - BWI
Nonstop2h 49mFrontier
Mon 9/812:00 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 8/16$73
This Mytrip deal was found by Cheapflights users on 8/15. 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.
Fri 9/124:01 pmMIA - BWI
Nonstop2h 49mFrontier
Sun 9/1412:00 pmBWI - MIA
Nonstop2h 55mFrontier
Deal found 8/15$74
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/228:48 pmMIA - BWI
Nonstop2h 49mSpirit Airlines
Fri 9/264:51 pmBWI - MIA
Nonstop2h 52mSpirit Airlines
Deal found 8/15$76
This Cheapflightsfares deal was found by Cheapflights users on 8/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/211:35 amMIA - IAD
Nonstop2h 50mFrontier
Sun 10/53:15 pmIAD - MIA
Nonstop2h 49mFrontier
Deal found 8/17$96
This Cheapflightsfares deal was found by Cheapflights users on 8/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1811:35 amMIA - IAD
Nonstop2h 50mFrontier
Sun 9/213:15 pmIAD - MIA
Nonstop2h 49mFrontier
Deal found 8/17$97
This Frontier deal was found by Cheapflights users on 8/17. 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 9/511:35 amMIA - IAD
Nonstop2h 50mFrontier
Mon 9/83:15 pmIAD - MIA
Nonstop2h 49mFrontier
Deal found 8/17$98

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 17, 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 9/5

8:48 pm-11:37 pm

Nonstop2h 49m

Baltimore/Washington

Mon 9/8

4:51 pm-7:43 pm

Nonstop2h 52m

$57

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 9/12

8:48 pm-11:37 pm

Nonstop2h 49m

Baltimore/Washington

Sun 9/14

12:00 pm-2:55 pm

Nonstop2h 55m

$65

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Sat 8/30

9:29 pm-11:59 pm

Nonstop2h 30m

Baltimore/Washington

Sun 8/31

5:30 pm-8:24 pm

Nonstop2h 54m

$66

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Thu 8/28

9:29 pm-11:59 pm

Nonstop2h 30m

Baltimore/Washington

Sun 8/31

5:30 pm-8:24 pm

Nonstop2h 54m

$66

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 9/12

4:01 pm-6:50 pm

Nonstop2h 49m

Baltimore/Washington

Mon 9/15

12:00 pm-2:55 pm

Nonstop2h 55m

$68

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 9/5

4:01 pm-6:50 pm

Nonstop2h 49m

Baltimore/Washington

Sat 9/6

7:48 pm-10:42 pm

Nonstop2h 54m

$68

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 9/12

8:48 pm-11:37 pm

Nonstop2h 49m

Baltimore/Washington

Mon 9/15

4:51 pm-7:43 pm

Nonstop2h 52m

$68

MiamiBaltimore

MIA - BWI

MIABWI

Miami

Fri 9/5

4:01 pm-6:50 pm

Nonstop2h 49m

Baltimore/Washington

Mon 9/8

12:00 pm-2:55 pm

Nonstop2h 55m

$69

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 10/2

11:35 am-2:25 pm

Nonstop2h 50m

Washington, D.C. Dulles Intl

Sun 10/5

3:15 pm-6:04 pm

Nonstop2h 49m

$96

MiamiWashington, D.C.

MIA - IAD

MIAIAD

Miami

Thu 11/6

12:32 pm-3:06 pm

Nonstop2h 34m

Washington, D.C. Dulles Intl

Mon 11/10

3:51 pm-6:38 pm

Nonstop2h 47m

$96

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 54 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 August 8, 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, July is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. (average of $302). Flying from Key Largo to Washington, D.C. in April is currently the most expensive (average of $337). 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 August 17, 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 Tuesday evenings when fares are most often at their lowest. Monday at noon 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 August 17, 2025.

The most flights from KE9 to WAS are scheduled on a Sunday (23 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (18 on average).

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 August 17, 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
8.0
Very good
7,986 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
8.0
Very good
7,986 reviews
Delta
8.0
Very good
7,986 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
8,919 reviews
Delta
8.0
Very good
7,986 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
10,000 reviews
Delta
8.0
Very good
7,986 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
8,040 reviews
Delta
8.0
Very good
7,986 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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
3,212 reviews
Delta
8.0
Very good
7,986 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

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.

  • 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 (86%), Copa Airlines (72%) and Frontier (45%).

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

    The cheapest flight price from Key Largo to Washington, D.C. is $52. On average you can expect to pay $2,209. The most popular route, (Miami - Washington, D.C. Dulles Intl), can usually be booked for $73.

  • 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, July is the cheapest month in which you can book a flight from Key Largo to Washington, D.C. (average of $302). Flying from Key Largo to Washington, D.C. in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Fairfax
Manassas
Falls Church
Laurel
Rockville
Oxon Hill
National Harbor
Dundalk
Waldorf
Bowie

Browse thousands of different options on Cheapflights for your next trip

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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 August 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$47Average$131FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$66Average$145FlexibilityNo cancel feeOn-time65%
DeltaCheapest$98Average$230FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$108Average$288FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$110Average$211FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$117Average$260FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$128Average$297FlexibilityNo cancel feeOn-time71%

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