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Key Largo

$42+ Cheap flights from Washington, D.C. (WAS) to Key Largo, FL

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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — MIA
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Key Largo are usually found in February or January, booked 31 days in advance, depart on a Monday or Saturday and return on a Friday

Cheap flight deals from Washington, D.C. to Key Largo

Keep the following information in mind while searching for Washington, D.C. to Key Largo flight deals. Data was last updated August 18, 2025.

Round-trip from

$81
(FlightHub)

One-way from

$42
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$206
From Washington, D.C. (WAS) to Key Largo
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One-way flight from Washington, D.C. (WAS) to Key Largo
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Highest demand for flights based on searches. 8% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($10 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 Washington, D.C. to Key Largo

Cheapest flights from Washington, D.C. to Key Largo
Explore the most affordable flight options available from Washington, D.C. to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/294:51 pmBWI - MIA
Nonstop2h 52mMultiple Airlines
Sat 10/44:01 pmMIA - BWI
Nonstop2h 49mMultiple Airlines
Deal found 8/16$81
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1912:20 pmBWI - MIA
Nonstop2h 46mMultiple Airlines
Fri 10/248:50 pmMIA - BWI
Nonstop2h 45mMultiple Airlines
Deal found 8/17$82
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.
Sun 9/712:00 pmBWI - MIA
Nonstop2h 55mFrontier
Fri 9/194:01 pmMIA - BWI
Nonstop2h 49mFrontier
Deal found 8/17$83
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/137:48 pmBWI - MIA
Nonstop2h 54mFrontier
Sat 10/1810:34 amMIA - BWI
Nonstop2h 51mFrontier
Deal found 8/17$84
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1611:02 amBWI - MIA
1 stop7h 02mMultiple Airlines
Thu 9/184:00 pmMIA - BWI
Nonstop2h 49mMultiple Airlines
Deal found 8/17$85
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.
Sun 8/3111:12 amBWI - MIA
Nonstop2h 46mFrontier
Fri 9/54:01 pmMIA - BWI
Nonstop2h 49mFrontier
Deal found 8/16$86
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.
Sat 8/2311:44 amBWI - MIA
Nonstop2h 46mFrontier
Sat 8/308:00 amMIA - BWI
Nonstop2h 49mFrontier
Deal found 8/16$87
This Spirit 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/84:51 pmBWI - MIA
Nonstop2h 52mSpirit Airlines
Wed 9/105:10 pmMIA - BWI
1 stop5h 23mSpirit Airlines
Deal found 8/16$90
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3111:12 amBWI - MIA
Nonstop2h 46mFrontier
Thu 9/44:00 pmMIA - BWI
Nonstop2h 49mFrontier
Deal found 8/16$91
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/812:00 pmBWI - MIA
Nonstop2h 55mMultiple Airlines
Fri 9/128:48 pmMIA - BWI
Nonstop2h 49mMultiple Airlines
Deal found 8/17$92
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.
Sat 8/305:30 pmBWI - MIA
Nonstop2h 54mSpirit Airlines
Sat 9/205:10 pmMIA - BWI
1 stop5h 23mSpirit Airlines
Deal found 8/16$95
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.
Thu 9/113:15 pmIAD - MIA
Nonstop2h 49mFrontier
Mon 9/1511:35 amMIA - IAD
Nonstop2h 50mFrontier
Deal found 8/17$98

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Key Largo 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 18, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Key Largo that are best for you.

Fly from

Washington, D.C.

Fly to

Key Largo

Route

Depart

Return

Price

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Sun 10/19

12:20 pm-3:06 pm

Nonstop2h 46m

Miami

Sun 10/26

8:50 am-11:35 am

Nonstop2h 45m

$82

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Mon 9/15

12:00 pm-2:55 pm

Nonstop2h 55m

Miami

Mon 9/22

4:01 pm-6:50 pm

Nonstop2h 49m

$82

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Mon 10/20

12:30 pm-3:16 pm

Nonstop2h 46m

Miami

Sat 10/25

10:34 am-1:25 pm

Nonstop2h 51m

$82

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Sun 9/7

12:00 pm-2:55 pm

Nonstop2h 55m

Miami

Fri 9/19

4:01 pm-6:50 pm

Nonstop2h 49m

$83

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Sat 9/6

7:48 pm-10:42 pm

Nonstop2h 54m

Miami

Mon 9/8

8:48 pm-11:37 pm

Nonstop2h 49m

$85

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Tue 9/16

11:02 am-6:04 pm

1 stop7h 02m

Miami

Sat 9/20

4:01 pm-6:50 pm

Nonstop2h 49m

$85

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Fri 9/5

4:51 pm-7:43 pm

Nonstop2h 52m

Miami

Mon 9/8

8:48 pm-11:37 pm

Nonstop2h 49m

$88

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Mon 9/8

4:51 pm-7:43 pm

Nonstop2h 52m

Miami

Wed 9/10

5:10 pm-10:33 pm

1 stop5h 23m

$90

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Sat 9/13

7:48 pm-10:42 pm

Nonstop2h 54m

Miami

Sat 9/20

5:10 pm-10:33 pm

1 stop5h 23m

$97

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

Mon 9/1

2:31 pm-5:20 pm

Nonstop2h 49m

Miami

Fri 9/5

4:01 pm-6:50 pm

Nonstop2h 49m

$98

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 58 results
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Best time to book a flight from Washington, D.C. to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Washington, D.C. 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 Washington, D.C. to Key Largo

How far ahead should I book a flight from Washington, D.C. to Key Largo?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Key Largo. Price data was last updated on August 8, 2025.

The best time to book flights from Washington, D.C. to Key Largo is 30 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Washington, D.C. to Key Largo?

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. to Key Largo (average of $232). Flying from Washington, D.C. to Key Largo in March is currently the most expensive (average of $289). 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 WAS to KE9?

Find hourly flight availability from Washington, D.C. to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

When flying from Washington, D.C. to Key Largo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Washington, D.C. to Key Largo?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Key Largo. Price data was last updated on December 16, 2024.

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

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

Explore weekly flight availability from Washington, D.C. to Key Largo. 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 18, 2025.

The most flights from WAS to KE9 are scheduled on a Sunday (24 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. 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 Key Largo. Reviews last updated August 18, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Key Largo, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
United Airlines
7.4
Good
8,925 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
Spirit Airlines
6.3
Okay
8,038 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
Frontier
5.8
Fair
3,212 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Key Largo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Washington, D.C. to Key Largo one-way?

    One-way options have recently been found by users for as low as $42 on Spirit Airlines. Other airlines that offer cheap prices include Frontier from $43 and Delta from $74 one-way.

  • What are the most popular routes from Washington, D.C. to Key Largo?

    Most travelers choose Washington, D.C. Dulles Intl - Miami, Washington, D.C. Reagan-National - Miami or Baltimore/Washington - Miami when deciding on the best route from Washington, D.C. to Key Largo.

  • What are the most reliable airlines from Washington, D.C. to Key Largo?

    Before booking your flight to Key Largo from Washington, D.C., check out the most reliable airlines to get you to your destination on time: Copa Airlines (84%), United Airlines (84%), Frontier( 36%).

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

    Looking at all options, your cheapest flight can be booked for $40. While the most popular route (Washington, D.C. Dulles Intl - Miami) can be booked for $78 on average our data indicates $261 when flying from Washington, D.C. to Key Largo.

  • Can I find deals for flights from Washington, D.C. to Key Largo that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Key Largo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Key Largo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Key Largo.

  • Can I find deals for business class flights from Washington, D.C. to Key Largo?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Key Largo 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 Washington, D.C. to Key Largo?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. to Key Largo (average of $232). Flying from Washington, D.C. to Key Largo in March is currently the most expensive (average of $289). 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

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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Washington, D.C. to Key Largo

Discover the top 8 airlines that operate flights from Washington, D.C. to Key Largo. 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$49Average$169FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$56Average$172FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$83Average$279FlexibilityNo cancel feeOn-time62%
DeltaCheapest$113Average$349FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$126Average$260FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$147Average$370FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$156Average$384FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$161Average$393FlexibilityNo cancel feeOn-time69%

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