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Key Largo

$70+ Cheap flights from Reagan-National (DCA) 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 5/24. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — MIA
Jun 5 — Jun 121
Fri 6/5
Fri 6/12
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Key Largo are usually found in September or August, booked 53 days in advance, depart on a Saturday or Friday and return on a Friday

Cheap flight deals from Reagan-National to Key Largo

Cheapest flights from Reagan-National to Key Largo
Explore the most affordable flight options available from Reagan-National to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 6, 2026.

This Expedia deal was found by Cheapflights users on 5/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:00 am
DCA
-
MIA
1 stop22h 51m
Frontier
Tue 7/216:00 am
MIA
-
DCA
1 stop30h 51m
Frontier
Deal found 5/4$190
This Frontier deal was found by Cheapflights users on 5/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/241:59 pm
DCA
-
MIA
1 stop15h 34m
Frontier
Fri 5/296:30 am
MIA
-
DCA
1 stop15h 28m
Frontier
Deal found 5/2$205
This Frontier deal was found by Cheapflights users on 5/4. 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.
Tue 7/146:00 pm
DCA
-
MIA
1 stop11h 51m
Frontier
Thu 7/166:00 am
MIA
-
DCA
1 stop10h 59m
Frontier
Deal found 5/4$210
This Southwest deal was found by Cheapflights users on 5/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/164:40 pm
DCA
-
MIA
1 stop5h 30m
Southwest
Tue 6/2311:25 am
MIA
-
DCA
1 stop7h 30m
Southwest
Deal found 5/2$211
This Booking.com deal was found by Cheapflights users on 5/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 pm
DCA
-
MIA
1 stop11h 33m
Frontier
Fri 5/296:30 am
MIA
-
DCA
1 stop15h 28m
Frontier
Deal found 5/4$212
This Frontier deal was found by Cheapflights users on 5/3. 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 5/236:00 pm
DCA
-
MIA
1 stop11h 33m
Frontier
Wed 6/36:30 am
MIA
-
DCA
1 stop15h 28m
Frontier
Deal found 5/3$215
This Southwest deal was found by Cheapflights users on 5/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:00 am
DCA
-
MIA
1 stop8h 50m
Southwest
Wed 6/1011:25 am
MIA
-
DCA
2 stops7h 30m
Southwest
Deal found 5/4$216
This Super.com deal was found by Cheapflights users on 5/3. 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.
Mon 5/257:00 am
DCA
-
MIA
1 stop22h 33m
Frontier
Wed 6/36:30 am
MIA
-
DCA
1 stop15h 28m
Frontier
Deal found 5/3$217
This Booking.com deal was found by Cheapflights users on 5/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/257:00 am
DCA
-
MIA
1 stop22h 33m
Frontier
Fri 5/296:30 am
MIA
-
DCA
1 stop15h 28m
Frontier
Deal found 5/4$218
This Southwest deal was found by Cheapflights users on 5/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2612:00 pm
DCA
-
MIA
2 stops8h 40m
Southwest
Wed 5/2712:10 pm
MIA
-
DCA
2 stops10h 35m
Southwest
Deal found 5/4$221
This Kissandfly.com deal was found by Cheapflights users on 5/3. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 pm
DCA
-
MIA
1 stop11h 51m
Frontier
Tue 7/286:00 am
MIA
-
DCA
1 stop15h 59m
Frontier
Deal found 5/3$222
This Frontier deal was found by Cheapflights users on 5/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:00 pm
DCA
-
MIA
1 stop11h 54m
Frontier
Sat 8/296:00 am
MIA
-
DCA
1 stop10h 57m
Frontier
Deal found 5/2$224

Find flight deals from Reagan-National to Key Largo

Keep the following information in mind while searching for Reagan-National to Key Largo flight deals. Data was last updated May 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$190
(Expedia)

One-way from

$70
(CheapOair)

Popular in

March

Cheapest in

September

Average price

$295
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. Reagan-National to Key Largo
Search Deals
One-way flight from Washington, D.C. Reagan-National to Key Largo
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National 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 May 6, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Wed 6/3

7:30 pm-12:48 am

1 stop5h 18m

Miami

Mon 6/8

11:24 am-2:05 pm

Nonstop2h 41m

$241

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Wed 6/24

12:17 pm-5:00 pm

1 stop4h 43m

Miami

Tue 6/30

6:00 am-11:08 am

1 stop5h 08m

$251

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Sat 6/13

2:00 pm-10:31 pm

1 stop8h 31m

Miami

Fri 6/19

11:26 am-6:58 pm

1 stop7h 32m

$251

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Fri 7/3

2:35 pm-10:05 pm

2 stops7h 30m

Miami

Fri 7/10

5:25 am-12:30 pm

2 stops7h 05m

$261

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Thu 7/16

6:00 am-2:10 pm

1 stop8h 10m

Miami

Mon 7/20

5:10 am-12:20 pm

1 stop7h 10m

$275

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Thu 5/28

3:35 pm-10:50 pm

1 stop7h 15m

Miami

Fri 5/29

6:05 am-4:35 pm

1 stop10h 30m

$279

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Sat 5/9

6:10 am-2:30 pm

1 stop8h 20m

Miami

Tue 5/12

12:10 pm-8:45 pm

2 stops8h 35m

$280

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Sat 5/16

12:00 pm-6:20 pm

1 stop6h 20m

Miami

Tue 5/19

4:05 pm-8:45 pm

1 stop4h 40m

$285

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Thu 6/4

5:25 pm-10:05 pm

1 stop4h 40m

Miami

Sun 6/7

5:00 am-12:20 pm

1 stop7h 20m

$290
Quickest round-trip

Washington, D.C.Miami

DCA - MIA

DCAMIA

Washington, D.C. Reagan-National

Thu 6/4

2:47 pm-5:37 pm

Nonstop2h 50m

Miami

Thu 6/11

11:24 am-2:05 pm

Nonstop2h 41m

$294

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/5

Showing 1-10 of 24 resultsSorted by cheapest first
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Best time to book a flight from Reagan-National to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Reagan-National 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. Reagan-National Airport to Key Largo

What is the cheapest time of day to fly from DCA to KE9?

Find hourly flight availability from Reagan-National 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 May 6, 2026.

One of the essential ways to save on airfare from Washington, D.C. Reagan-National Airport to Key Largo is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 25% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Reagan-National to Key Largo. Price data was last updated on May 2, 2026.

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

Weekly flight availability from Washington, D.C. Reagan-National Airport to Key Largo

Explore weekly flight availability from Reagan-National 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 May 6, 2026.

The most flights from DCA to KE9 are scheduled on a Monday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

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

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 May 6, 2026.
See what other customers who have flown with Southwest,Delta, andAmerican Airlines from Washington, D.C. Reagan-National Airport to Key Largo have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

7.9

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
7.9
Good
4,305 reviews
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

7.9

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,459 reviews
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

7.9

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,667 reviews
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

7.9

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
JetBlue
7.1
Good
2,978 reviews
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

7.9

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.6
Fair
2,964 reviews
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

7.9

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National 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. Reagan-National Airport to Key Largo?

    Delta and Southwest can get you from Washington, D.C. Reagan-National Airport to Key Largo in just under 5h 18m. Your travel time can differ by up to 2h 12m. Washington, D.C. Reagan-National Airport and Key Largo are separated by a distance of 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. Reagan-National Airport to Key Largo one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $39. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Washington, D.C. Reagan-National Airport to Key Largo for a low price.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Reagan-National Airport to Key Largo consider choosing American Airlines (81%), Alaska Airlines (81%) or LATAM Airlines (77%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $148. While the most popular route (Washington, D.C. Reagan-National - Miami) can be booked for $227 on average, our data indicates $697 when flying from Washington, D.C. Reagan-National Airport to Key Largo.

  • Can I find deals for flights from Reagan-National to Key Largo that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Key Largo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Key Largo?

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

  • Can I find deals for business class flights from Reagan-National to Key Largo?

    Yes. Cheapflights offers flight deals from Reagan-National 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.

See more FAQs

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Alternative routes for Reagan-National to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
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Reagan-National to Daytona Beach flights
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Baltimore to Tallahassee flights
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Reagan-National to Gainesville flights

Top 8 airlines flying from Reagan-National to Key Largo

Discover the top 8 airlines that operate flights from Reagan-National 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 May 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$43Average$159FlexibilityNo cancel feeOn-time65%
FrontierCheapest$56Average$191FlexibilityNo cancel feeOn-time62%
DeltaCheapest$113Average$360FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$113Average$281FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$120Average$259FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$126Average$260FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$146Average$351FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$186Average$437FlexibilityNo cancel feeOn-time69%

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