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Key Largo

$48+ 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 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — MIA
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 Sunday and return on a Friday

Cheap 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 December 18, 2025.

This Frontier deal was found by Cheapflights users on 12/17. 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.
Wed 12/317:01 pmIAD - MIA
1 stop5h 46mFrontier
Thu 1/810:22 amMIA - IAD
Nonstop2h 39mFrontier
Deal found 12/17$111
This Trip.com deal was found by Cheapflights users on 12/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:15 pmIAD - MIA
1 stop9h 45mFrontier
Thu 1/810:22 amMIA - IAD
Nonstop2h 39mFrontier
Deal found 12/15$114
This Frontier deal was found by Cheapflights users on 12/17. 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.
Wed 12/311:31 pmBWI - MIA
Nonstop2h 51mFrontier
Mon 1/125:01 amMIA - BWI
Nonstop2h 43mFrontier
Deal found 12/17$121
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:31 pmBWI - MIA
Nonstop2h 51mFrontier
Fri 1/95:01 amMIA - BWI
Nonstop2h 43mFrontier
Deal found 12/16$122
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Mon 12/295:42 pmBWI - MIA
Nonstop2h 55mFrontier
Fri 1/95:01 amMIA - BWI
Nonstop2h 43mFrontier
Deal found 12/16$125
This Priceline deal was found by Cheapflights users on 12/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:42 pmBWI - MIA
Nonstop2h 55mFrontier
Thu 1/85:01 amMIA - BWI
Nonstop2h 43mFrontier
Deal found 12/16$126
This Priceline deal was found by Cheapflights users on 12/17. 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 12/298:26 pmIAD - MIA
1 stop9h 34mFrontier
Thu 1/810:22 amMIA - IAD
Nonstop2h 39mFrontier
Deal found 12/17$131
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Wed 12/317:01 pmIAD - MIA
1 stop18h 05mMultiple Airlines
Wed 1/78:00 amMIA - IAD
1 stop8h 50mMultiple Airlines
Deal found 12/17$132
This Super.com deal was found by Cheapflights users on 12/16. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:18 pmBWI - MIA
1 stop15h 31mFrontier
Wed 12/315:56 pmMIA - BWI
Nonstop2h 52mFrontier
Deal found 12/16$133
This Frontier deal was found by Cheapflights users on 12/17. 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.
Mon 12/295:42 pmBWI - MIA
Nonstop2h 55mFrontier
Wed 12/315:56 pmMIA - BWI
Nonstop2h 52mFrontier
Deal found 12/17$134
This CheapOair deal was found by Cheapflights users on 12/17. 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.
Tue 12/309:20 amBWI - MIA
Nonstop3h 00mFrontier
Wed 12/315:56 pmMIA - BWI
Nonstop2h 52mFrontier
Deal found 12/17$135
This Frontier deal was found by Cheapflights users on 12/17. 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.
Wed 12/311:31 pmBWI - MIA
Nonstop2h 51mFrontier
Sun 1/115:01 amMIA - BWI
Nonstop2h 43mFrontier
Deal found 12/17$138

Find 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 December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$77
(Kiwi.com)

One-way from

$48
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$297
Provider with most accurate pricing for Washington, D.C. (WAS)-Miami flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Miami flights.
Search Deals
From Washington, D.C. (WAS) to Key Largo
Search Deals
One-way flight from Washington, D.C. (WAS) to Key Largo
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 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

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Tue 1/27

2:30 pm-5:28 pm

Nonstop2h 58m

Miami

Tue 2/3

11:21 am-2:00 pm

Nonstop2h 39m

$131

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Wed 2/11

2:30 pm-5:28 pm

Nonstop2h 58m

Miami

Wed 2/18

11:21 am-2:00 pm

Nonstop2h 39m

$134

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Sat 1/17

5:00 pm-11:20 pm

1 stop6h 20m

Miami

Fri 1/23

11:21 am-2:00 pm

Nonstop2h 39m

$149

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Wed 2/4

2:30 pm-5:28 pm

Nonstop2h 58m

Miami

Sat 2/7

7:15 am-12:40 pm

1 stop5h 25m

$149

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Tue 1/13

2:35 pm-5:33 pm

Nonstop2h 58m

Miami

Sat 1/24

7:15 am-3:00 pm

1 stop7h 45m

$149

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Thu 2/26

3:35 pm-11:35 pm

1 stop8h 00m

Miami

Mon 3/2

6:05 pm-10:55 pm

1 stop4h 50m

$151

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Thu 1/8

1:00 pm-8:05 pm

1 stop7h 05m

Miami

Tue 1/13

5:20 pm-10:55 pm

1 stop5h 35m

$151

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Tue 1/20

11:00 am-6:35 pm

1 stop7h 35m

Miami

Sat 1/24

6:45 am-11:50 am

1 stop5h 05m

$151

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Mon 1/12

2:35 pm-5:33 pm

Nonstop2h 58m

Miami

Sat 1/24

11:21 am-2:00 pm

Nonstop2h 39m

$156

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Mon 1/19

2:30 pm-5:28 pm

Nonstop2h 58m

Miami

Sat 1/24

11:21 am-2:00 pm

Nonstop2h 39m

$156

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 60 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 December 12, 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, March is the cheapest month in which you can book a flight from Washington, D.C. to Key Largo (average of $43). Flying from Washington, D.C. to Key Largo in July is currently the most expensive (average of $89). 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 December 18, 2025.

It’s typically best to fly out from Washington, D.C. to Key Largo in the evening. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.

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 Tuesday at noon 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.

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 December 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
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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
9,093 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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
11,055 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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
8,190 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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
3,081 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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.

  • How long is the flight from Washington, D.C. to Key Largo?

    A quick flight from Washington, D.C. to Key Largo can take about 2h 58m. Delta provides one of the quickest options available for as low as $131. The distance between Washington, D.C. and Key Largo is about 921 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $32 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $37 and Delta from $68 one-way.

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

    Most travelers choose Washington, D.C. Reagan-National - Miami, Baltimore/Washington - Miami or Washington, D.C. Dulles Intl - 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: Volaris (100%), United Airlines (88%), Copa Airlines( 80%).

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

    Looking at all options, your cheapest flight can be booked for $34. While the most popular route (Washington, D.C. Reagan-National - Miami) can be booked for $117 on average, our data indicates $536 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, March is the cheapest month in which you can book a flight from Washington, D.C. to Key Largo (average of $43). Flying from Washington, D.C. to Key Largo in July is currently the most expensive (average of $89). 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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Dulles Intl to Valdosta flights

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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$51Average$190FlexibilityNo cancel feeOn-time65%
FrontierCheapest$53Average$173FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$95Average$260FlexibilityNo cancel feeOn-time62%
DeltaCheapest$100Average$377FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$126Average$260FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$127Average$371FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$133Average$336FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$155Average$376FlexibilityNo cancel feeOn-time71%

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