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Key Largo

$114+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — MIA
May 9 — May 161
Sat 5/9
Sat 5/16
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 April 9, 2026.

This Delta deal was found by Cheapflights users on 4/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:22 pm
MDT
-
MIA
1 stop5h 17m
Delta
Sun 8/96:00 am
MIA
-
MDT
1 stop5h 10m
Delta
Deal found 4/4$353
This American Airlines deal was found by Cheapflights users on 4/5. 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 5/99:57 am
MDT
-
MIA
1 stop5h 53m
American Airlines
Sat 5/167:45 am
MIA
-
MDT
1 stop7h 06m
American Airlines
Deal found 4/5$359
This Delta deal was found by Cheapflights users on 4/5. 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.
Sat 4/252:40 pm
MDT
-
MIA
1 stop6h 08m
Delta
Sat 5/27:04 am
MIA
-
MDT
1 stop6h 48m
Delta
Deal found 4/5$369
This American Airlines deal was found by Cheapflights users on 4/8. 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 11/196:40 am
MDT
-
MIA
1 stop6h 38m
American Airlines
Tue 11/243:19 pm
MIA
-
MDT
1 stop6h 55m
American Airlines
Deal found 4/8$373
This American Airlines deal was found by Cheapflights users on 4/6. 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.
Wed 4/222:50 pm
MDT
-
MIA
1 stop5h 21m
American Airlines
Mon 4/275:20 pm
MIA
-
MDT
1 stop5h 33m
American Airlines
Deal found 4/6$384
This Delta deal was found by Cheapflights users on 4/5. 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.
Sat 6/136:22 pm
MDT
-
MIA
1 stop5h 19m
Delta
Sat 6/206:00 am
MIA
-
MDT
1 stop5h 11m
Delta
Deal found 4/5$386
This American Airlines deal was found by Cheapflights users on 4/5. 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.
Wed 6/36:32 am
MDT
-
MIA
1 stop6h 35m
American Airlines
Mon 6/86:12 pm
MIA
-
MDT
1 stop4h 56m
American Airlines
Deal found 4/5$400
This Delta deal was found by Cheapflights users on 4/8. 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 4/246:19 pm
MDT
-
MIA
1 stop6h 35m
Delta
Tue 4/2812:12 pm
MIA
-
MDT
1 stop5h 21m
Delta
Deal found 4/8$405
This Delta deal was found by Cheapflights users on 4/8. 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.
Sun 8/166:25 pm
MDT
-
MIA
1 stop6h 29m
Delta
Sat 8/227:00 am
MIA
-
MDT
1 stop4h 36m
Delta
Deal found 4/8$406
This American Airlines deal was found by Cheapflights users on 4/8. 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 5/143:01 pm
MDT
-
MIA
1 stop7h 48m
American Airlines
Mon 5/185:25 pm
MIA
-
MDT
1 stop5h 28m
American Airlines
Deal found 4/8$407

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 April 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$353
(Delta)

One-way from

$114
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$493
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. 2% potential increase in price ($11 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 April 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 April 9, 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

Cheapest round-trip
Quickest round-trip

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sat 6/13

6:22 pm-11:41 pm

1 stop5h 19m

Miami

Sat 6/20

6:00 am-11:11 am

1 stop5h 11m

$386

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Mon 5/4

6:15 am-11:36 am

1 stop5h 21m

Miami

Fri 5/15

4:15 pm-12:55 am

1 stop8h 40m

$449

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Thu 5/7

6:15 am-11:36 am

1 stop5h 21m

Miami

Thu 5/14

4:20 pm-12:55 am

1 stop8h 35m

$449

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sat 4/25

8:29 am-3:05 pm

1 stop6h 36m

Miami

Sat 5/2

7:00 am-9:19 pm

2 stops14h 19m

$567

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Thu 5/14

10:40 am-4:16 pm

1 stop5h 36m

Miami

Mon 5/18

7:40 pm-1:55 pm

2 stops18h 15m

$577

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sat 5/9

10:40 am-4:16 pm

1 stop5h 36m

Miami

Sat 5/16

7:00 am-9:19 pm

2 stops14h 19m

$603

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Thu 4/16

6:15 am-11:31 am

1 stop5h 16m

Miami

Mon 4/20

8:55 am-4:50 pm

1 stop7h 55m

$630

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Thu 5/28

6:30 am-3:04 pm

1 stop8h 34m

Miami

Sun 5/31

5:24 pm-9:36 am

1 stop16h 12m

$692

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Fri 4/24

8:29 am-3:05 pm

1 stop6h 36m

Miami

Mon 4/27

4:45 pm-9:44 am

2 stops16h 59m

$696

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Fri 5/8

6:15 am-2:23 pm

2 stops8h 08m

Miami

Sat 5/16

12:10 pm-9:19 pm

1 stop9h 09m

$698

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/7

Showing 1-10 of 21 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 April 3, 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, September is the cheapest month in which you can book a flight from Harrisburg to Key Largo (average of $54). Flying from Harrisburg to Key Largo in July is currently the most expensive (average of $98). 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 April 9, 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.

How much does it cost to fly round-trip from Harrisburg 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 April 9, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican 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
8,392 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Entertainment

7.8

Crew

8.5

Comfort

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
8,392 reviews
Delta
7.9
Good
8,392 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Entertainment

7.8

Crew

8.5

Comfort

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
9,554 reviews
Delta
7.9
Good
8,392 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Entertainment

7.8

Crew

8.5

Comfort

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
7.1
Good
11,560 reviews
Delta
7.9
Good
8,392 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Entertainment

7.8

Crew

8.5

Comfort

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 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 5h 19m. The time it takes to get you to your destination can typically vary by up to 02m. 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, September is the cheapest month in which you can book a flight from Harrisburg to Key Largo (average of $54). Flying from Harrisburg to Key Largo in July is currently the most expensive (average of $98). 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 April 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$93Average$170FlexibilityNo cancel feeOn-time88%
DeltaCheapest$133Average$368FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$382FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$258Average$434FlexibilityNo cancel feeOn-time71%

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