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Key Largo

$120+ 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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — MIA
Mar 28 — Apr 41
Sat 3/28
Sat 4/4
1 adult, Economy
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Cheap 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 February 26, 2026.

This eDestinos deal was found by Cheapflights users on 2/24. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:18 pm
MDT
-
MIA
2 stops26h 29m
Frontier
Tue 3/315:05 am
MIA
-
MDT
2 stops12h 53m
Frontier
Deal found 2/24$259
This Delta deal was found by Cheapflights users on 2/23. 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.
Wed 9/2312:25 pm
MDT
-
MIA
1 stop4h 57m
Delta
Sat 10/36:00 am
MIA
-
MDT
1 stop5h 36m
Delta
Deal found 2/23$279
This Delta deal was found by Cheapflights users on 2/23. 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.
Wed 3/116:32 pm
MDT
-
MIA
1 stop6h 20m
Delta
Tue 3/176:27 pm
MIA
-
MDT
1 stop5h 14m
Delta
Deal found 2/23$294
This American Airlines deal was found by Cheapflights users on 2/24. 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 3/205:06 pm
MDT
-
MIA
1 stop4h 39m
American Airlines
Sat 3/287:50 pm
MIA
-
MDT
Nonstop3h 02m
American Airlines
Deal found 2/24$309
This American Airlines deal was found by Cheapflights users on 2/24. 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.
Tue 3/244:30 pm
MDT
-
MIA
1 stop6h 15m
American Airlines
Tue 3/318:33 am
MIA
-
MDT
1 stop6h 16m
American Airlines
Deal found 2/24$318
This American Airlines deal was found by Cheapflights users on 2/25. 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 4/112:50 pm
MDT
-
MIA
1 stop5h 21m
American Airlines
Sat 4/187:05 am
MIA
-
MDT
1 stop7h 13m
American Airlines
Deal found 2/25$319
This American Airlines deal was found by Cheapflights users on 2/25. 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.
Thu 5/147:51 pm
MDT
-
MIA
1 stop5h 08m
American Airlines
Tue 5/194:02 pm
MIA
-
MDT
1 stop6h 51m
American Airlines
Deal found 2/25$326
This American Airlines deal was found by Cheapflights users on 2/24. 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.
Mon 4/272:50 pm
MDT
-
MIA
1 stop8h 01m
American Airlines
Wed 4/297:05 am
MIA
-
MDT
1 stop7h 13m
American Airlines
Deal found 2/24$333
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Fri 5/86:30 am
MDT
-
MIA
1 stop8h 30m
United Airlines
Mon 5/114:15 pm
MIA
-
MDT
1 stop8h 40m
United Airlines
Deal found 2/22$334
This American Airlines deal was found by Cheapflights users on 2/22. 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 4/177:51 pm
MDT
-
MIA
1 stop5h 08m
American Airlines
Sun 4/267:05 am
MIA
-
MDT
1 stop7h 13m
American Airlines
Deal found 2/22$344
This United Airlines deal was found by Cheapflights users on 2/22. 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 7/236:15 am
MDT
-
MIA
1 stop5h 20m
United Airlines
Fri 7/315:24 pm
MIA
-
MDT
1 stop7h 06m
United Airlines
Deal found 2/22$349

Find 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 February 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$259
(eDestinos)

One-way from

$120
(Kiwi.com)

Popular in

April

Cheapest in

September

Average price

$485
Provider with most accurate pricing for Harrisburg-Miami flight deals.
Search Deals
Provider most trusted by Cheapflights users for Harrisburg-Miami flights.
Search Deals
From Harrisburg to Key Largo
Search Deals
One-way flight from Harrisburg to Key Largo
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 26, 2026.
Use the filters below to find and compare flights from Harrisburg to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Wed 8/5

6:15 am-11:35 am

1 stop5h 20m

Miami

Wed 8/12

9:00 am-9:20 pm

2 stops12h 20m

$442

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sun 3/8

6:15 am-1:15 pm

1 stop7h 00m

Miami

Tue 3/17

2:21 pm-9:05 pm

1 stop6h 44m

$474

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Wed 3/18

6:32 pm-12:52 am

1 stop6h 20m

Miami

Sun 3/22

6:00 am-12:39 pm

1 stop6h 39m

$499

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Fri 4/10

6:15 am-11:31 am

1 stop5h 16m

Miami

Sat 4/18

7:01 am-11:28 pm

2 stops16h 27m

$534

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Tue 8/4

8:15 am-3:04 pm

1 stop6h 49m

Miami

Thu 8/6

5:24 pm-12:30 am

1 stop7h 06m

$593

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Thu 7/23

6:15 am-2:38 pm

2 stops8h 23m

Miami

Fri 7/31

5:24 pm-12:30 am

1 stop7h 06m

$676

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Fri 8/7

10:30 am-10:40 pm

2 stops12h 10m

Miami

Fri 8/14

12:15 pm-9:20 pm

1 stop9h 05m

$701

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Wed 3/18

2:33 pm-11:06 pm

2 stops8h 33m

Miami

Wed 3/25

9:00 am-4:50 pm

1 stop7h 50m

$716

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sun 3/8

6:15 am-1:15 pm

1 stop7h 00m

Miami

Thu 3/12

6:34 pm-11:13 pm

1 stop4h 39m

$724

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Tue 3/24

2:33 pm-11:06 pm

2 stops8h 33m

Miami

Tue 3/31

6:00 pm-11:28 pm

1 stop5h 28m

$740

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/26

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 February 20, 2026.

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 $44). Flying from Harrisburg to Key Largo in July is currently the most expensive (average of $94). 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 February 26, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Harrisburg to Key Largo as you normally would.

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 February 26, 2026.
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
8,237 reviews

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Food

7.2

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
8,237 reviews
Delta
7.9
Good
8,237 reviews

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Food

7.2

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
9,348 reviews
Delta
7.9
Good
8,237 reviews

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Food

7.2

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
11,353 reviews
Delta
7.9
Good
8,237 reviews

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Food

7.2

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 United Airlines and Delta fly from Harrisburg to Key Largo in about 5h 20m. The time it takes to get you to your destination can typically vary by up to 1h. 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.

  • 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 $44). Flying from Harrisburg to Key Largo in July is currently the most expensive (average of $94). 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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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 February 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$100Average$153FlexibilityNo cancel feeOn-time88%
DeltaCheapest$133Average$397FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$363FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$258Average$426FlexibilityNo cancel feeOn-time71%

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