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Key Largo

$124+ Cheap flights from Harrisburg (MDT) 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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — MIA
Dec 29 — Jan 51
Mon 12/29
Mon 1/5
1 adult, Economy
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Cheapflights Tip: The best prices from Harrisburg to Key Largo are usually found in September or October, booked 23 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap flight deals from Harrisburg to Key Largo

Keep the following information in mind while searching for Harrisburg to Key Largo flight deals. Data was last updated November 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$242
(United Airlines)

One-way from

$124
(Delta)

Popular in

January

Cheapest in

September

Average price

$413
Provider with most accurate pricing for Harrisburg-Miami flight deals.
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Provider most trusted by Cheapflights users for Harrisburg-Miami flights.
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From Harrisburg to Key Largo
Search Deals
One-way flight from Harrisburg to Key Largo
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Highest demand for flights based on searches. 9% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Harrisburg to Key Largo

Cheapest flights from Harrisburg to Key Largo
Explore the most affordable flight options available from Harrisburg to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 29, 2025.

This United Airlines deal was found by Cheapflights users on 11/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:15 amMDT - MIA
1 stop4h 59mUnited Airlines
Tue 12/234:06 pmMIA - MDT
1 stop8h 01mUnited Airlines
Deal found 11/27$258
This American Airlines deal was found by Cheapflights users on 11/28. 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.
Sat 12/132:55 pmMDT - MIA
1 stop7h 51mAmerican Airlines
Wed 12/173:27 pmMIA - MDT
1 stop6h 16mAmerican Airlines
Deal found 11/28$309
This Delta deal was found by Cheapflights users on 11/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:27 pmMDT - MIA
1 stop5h 19mDelta
Thu 12/1810:32 amMIA - MDT
1 stop8h 00mDelta
Deal found 11/27$318
This Delta deal was found by Cheapflights users on 11/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:27 pmMDT - MIA
1 stop5h 19mDelta
Thu 12/184:55 pmMIA - MDT
1 stop6h 18mDelta
Deal found 11/29$328
This American Airlines deal was found by Cheapflights users on 11/28. 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.
Sat 12/65:31 pmMDT - MIA
1 stop5h 04mAmerican Airlines
Sun 12/217:00 pmMIA - MDT
1 stop5h 19mAmerican Airlines
Deal found 11/28$329
This United Airlines deal was found by Cheapflights users on 11/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:30 amMDT - MIA
1 stop8h 40mUnited Airlines
Wed 12/1712:23 pmMIA - MDT
1 stop8h 34mUnited Airlines
Deal found 11/28$408
This American Airlines deal was found by Cheapflights users on 11/28. 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 11/2812:15 pmMDT - MIA
1 stop6h 58mAmerican Airlines
Sat 12/62:05 pmMIA - MDT
1 stop5h 35mAmerican Airlines
Deal found 11/28$409
This United Airlines deal was found by Cheapflights users on 11/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/146:15 amMDT - MIA
1 stop4h 59mUnited Airlines
Thu 12/184:06 pmMIA - MDT
1 stop8h 01mUnited Airlines
Deal found 11/28$418
This American Airlines deal was found by Cheapflights users on 11/26. 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 12/54:25 pmMDT - MIA
1 stop7h 27mAmerican Airlines
Sun 12/78:20 amMIA - MDT
1 stop6h 09mAmerican Airlines
Deal found 11/26$444
This United Airlines deal was found by Cheapflights users on 11/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/158:20 amMDT - MIA
1 stop6h 50mUnited Airlines
Fri 12/194:06 pmMIA - MDT
1 stop8h 01mUnited Airlines
Deal found 11/28$454
This United Airlines deal was found by Cheapflights users on 11/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:15 amMDT - MIA
1 stop4h 59mUnited Airlines
Mon 12/1512:23 pmMIA - MDT
1 stop8h 34mUnited Airlines
Deal found 11/27$459

Cheapflights Fare Finder

 
Customize your flight search to find flights from Harrisburg 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 November 29, 2025.
Use the filters below to find and compare flights from Harrisburg to Key Largo that are best for you.

Fly from

Harrisburg

Fly to

Key Largo

Route

Depart

Return

Price

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sun 1/11

6:02 pm-12:51 am

1 stop6h 49m

Miami

Wed 1/14

10:29 am-5:07 pm

1 stop6h 38m

$247

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Tue 2/3

6:30 am-3:05 pm

1 stop8h 35m

Miami

Fri 2/6

12:18 pm-9:05 pm

1 stop8h 47m

$247

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Tue 1/6

6:02 pm-12:51 am

1 stop6h 49m

Miami

Tue 1/13

12:00 pm-5:07 pm

1 stop5h 07m

$253

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sun 1/18

10:48 am-9:54 pm

2 stops11h 06m

Miami

Sat 1/24

9:00 am-4:44 pm

1 stop7h 44m

$279

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Tue 1/20

6:02 pm-12:51 am

1 stop6h 49m

Miami

Sat 1/24

8:15 am-1:16 pm

1 stop5h 01m

$308

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Wed 1/21

6:00 am-12:14 pm

1 stop6h 14m

Miami

Sat 1/24

7:15 am-1:16 pm

1 stop6h 01m

$313

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Mon 1/12

6:30 am-3:05 pm

1 stop8h 35m

Miami

Sat 1/17

9:00 am-4:44 pm

1 stop7h 44m

$322

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sat 1/17

10:42 am-4:40 pm

1 stop5h 58m

Miami

Sun 1/25

7:07 am-12:13 pm

1 stop5h 06m

$323

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sat 1/31

10:48 am-10:35 pm

2 stops11h 47m

Miami

Fri 2/6

9:00 am-4:34 pm

1 stop7h 34m

$332

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Fri 1/23

3:03 pm-10:22 pm

2 stops7h 19m

Miami

Mon 1/26

5:36 pm-11:37 pm

1 stop6h 01m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/29

Showing 1-10 of 19 results
1
2

Best time to book a flight from Harrisburg to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Harrisburg 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 Harrisburg to Key Largo

How far ahead should I book a flight from Harrisburg to Key Largo?

Use this chart to determine the optimal time to book a round-trip flight from Harrisburg to Key Largo. Price data was last updated on November 28, 2025.

Booking 23 days in advance of your planned departure date is, on average, the best time to get cheap flights from Harrisburg to Key Largo. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Harrisburg to Key Largo?

Currently, March is the cheapest month in which you can book a flight from Harrisburg to Key Largo (average of $43). Flying from Harrisburg to Key Largo in July is currently the most expensive (average of $92). 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 MDT to KE9?

Find hourly flight availability from Harrisburg 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 November 29, 2025.

When flying from Harrisburg to Key Largo, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 45% versus a flight in the morning.

What is the cheapest day to fly from Harrisburg to Key Largo?

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

Travelers seeking maximum savings on their Harrisburg to Key Largo flight should consider departing on Monday mornings 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 November 29, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Harrisburg 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.
Delta
7.9
Good
8,011 reviews

Crew

8.5

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

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
7.9
Good
8,011 reviews
Delta
7.9
Good
8,011 reviews

Crew

8.5

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

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
9,058 reviews
Delta
7.9
Good
8,011 reviews

Crew

8.5

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

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
11,044 reviews
Delta
7.9
Good
8,011 reviews

Crew

8.5

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

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.
Allegiant Air
7.2
Good
700 reviews
Delta
7.9
Good
8,011 reviews

Crew

8.5

Comfort

7.9

Boarding

8.1

Overall

7.9

Entertainment

7.9

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 Harrisburg 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 airport do you fly from for flights from Harrisburg to Key Largo?

    Harrisburg (MDT), located 8.5 mi from the city center, is the airport you fly out of when you book flights from Harrisburg to Key Largo. 4 airlines have flights from Harrisburg to Key Largo on a regular basis. Booking flights from Harrisburg to Key Largo should not be difficult; the airport handles an average of 0 outbound flights to Key Largo per day.

  • How long is the flight from Harrisburg to Key Largo?

    Airlines like Delta and United Airlines fly from Harrisburg to Key Largo in about 6h 49m. The time it takes to get you to your destination can typically vary by up to 1h 46m. Harrisburg and Key Largo are separated by a distance of 1015 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest flights from Harrisburg to Key Largo?

    Looking for the cheapest flight from Harrisburg to Key Largo? While on average our users pay $769, our data indicates the cheapest price to be $330. The most popular route (Harrisburg - Miami), is priced around $242.

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

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

  • How can I find direct flights from Harrisburg to Key Largo?

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

  • Can I find deals for business class flights from Harrisburg to Key Largo?

    Yes. Cheapflights offers flight deals from Harrisburg 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 Harrisburg to Key Largo?

    Currently, March is the cheapest month in which you can book a flight from Harrisburg to Key Largo (average of $43). Flying from Harrisburg to Key Largo in July is currently the most expensive (average of $92). 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.

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Top 4 airlines flying from Harrisburg to Key Largo

Discover the top 4 airlines that operate flights from Harrisburg 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 November 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$100Average$219FlexibilityNo cancel feeOn-time88%
DeltaCheapest$244Average$371FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$565FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$258Average$434FlexibilityNo cancel feeOn-time71%

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