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Key Largo

$118+ 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 2/14. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — MIA
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
1 adult, Economy
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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 January 12, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$279
(Delta)

One-way from

$118
(Kiwi.com)

Popular in

January

Cheapest in

September

Average price

$641
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 ($50 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 12, 2026.

This Delta deal was found by Cheapflights users on 1/11. 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.
Mon 4/276:20 pm
MDT
-
MIA
1 stop6h 30m
Delta
Tue 5/56:00 am
MIA
-
MDT
1 stop5h 30m
Delta
Deal found 1/11$279
This Delta deal was found by Cheapflights users on 1/11. 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 4/16:21 pm
MDT
-
MIA
1 stop6h 35m
Delta
Wed 4/88:00 am
MIA
-
MDT
1 stop7h 52m
Delta
Deal found 1/11$289
This Delta deal was found by Cheapflights users on 1/12. 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.
Tue 4/286:00 am
MDT
-
MIA
1 stop4h 52m
Delta
Wed 5/64:44 pm
MIA
-
MDT
1 stop7h 03m
Delta
Deal found 1/12$299
This American Airlines deal was found by Cheapflights users on 1/12. 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 2/113:03 pm
MDT
-
MIA
1 stop7h 48m
American Airlines
Wed 2/187:10 am
MIA
-
MDT
1 stop4h 51m
American Airlines
Deal found 1/12$305
This Delta deal was found by Cheapflights users on 1/12. 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.
Tue 4/286:20 pm
MDT
-
MIA
1 stop6h 30m
Delta
Tue 5/128:05 am
MIA
-
MDT
1 stop8h 03m
Delta
Deal found 1/12$309
This American Airlines deal was found by Cheapflights users on 1/12. 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 1/316:00 am
MDT
-
MIA
Nonstop3h 08m
American Airlines
Fri 2/62:39 pm
MIA
-
MDT
1 stop7h 48m
American Airlines
Deal found 1/12$314
This United Airlines deal was found by Cheapflights users on 1/12. 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 3/56:15 am
MDT
-
MIA
1 stop7h 00m
United Airlines
Mon 3/96:34 pm
MIA
-
MDT
1 stop4h 39m
United Airlines
Deal found 1/12$323
This American Airlines deal was found by Cheapflights users on 1/11. 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 2/205:06 pm
MDT
-
MIA
1 stop6h 37m
American Airlines
Mon 3/29:25 am
MIA
-
MDT
1 stop6h 51m
American Airlines
Deal found 1/11$324
This Delta deal was found by Cheapflights users on 1/12. 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.
Mon 1/266:02 pm
MDT
-
MIA
1 stop6h 49m
Delta
Sat 1/317:15 am
MIA
-
MDT
1 stop6h 01m
Delta
Deal found 1/12$329
This Delta deal was found by Cheapflights users on 1/12. 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.
Tue 2/2412:08 pm
MDT
-
MIA
1 stop6h 13m
Delta
Sat 2/287:15 am
MIA
-
MDT
1 stop6h 23m
Delta
Deal found 1/12$334
This Delta deal was found by Cheapflights users on 1/11. 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 1/236:02 pm
MDT
-
MIA
1 stop6h 49m
Delta
Tue 1/275:50 am
MIA
-
MDT
1 stop5h 47m
Delta
Deal found 1/11$354

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 January 12, 2026.
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

Sat 1/24

6:30 am-3:05 pm

1 stop8h 35m

Miami

Sat 1/31

9:00 am-4:44 pm

1 stop7h 44m

$354

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Tue 1/20

6:00 am-2:18 pm

1 stop8h 18m

Miami

Sat 1/24

7:15 am-1:16 pm

1 stop6h 01m

$354

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Tue 2/10

6:30 am-3:05 pm

1 stop8h 35m

Miami

Sat 2/14

9:00 am-4:44 pm

1 stop7h 44m

$359

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Fri 1/23

6:02 pm-12:51 am

1 stop6h 49m

Miami

Wed 1/28

12:00 pm-5:07 pm

1 stop5h 07m

$374

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Thu 1/22

6:00 am-12:14 pm

1 stop6h 14m

Miami

Wed 1/28

5:50 am-11:37 am

1 stop5h 47m

$374

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Mon 3/2

5:55 pm-12:53 am

1 stop6h 58m

Miami

Mon 3/9

6:27 pm-11:37 pm

1 stop5h 10m

$399

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Thu 1/29

6:02 pm-12:51 am

1 stop6h 49m

Miami

Sun 2/1

5:50 am-11:39 am

1 stop5h 49m

$404

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Thu 3/19

10:40 am-4:11 pm

1 stop5h 31m

Miami

Mon 3/23

6:34 pm-11:13 pm

1 stop4h 39m

$410

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Wed 2/25

6:29 am-1:13 pm

1 stop6h 44m

Miami

Tue 3/3

5:05 pm-9:37 am

2 stops16h 32m

$419

HarrisburgMiami

MDT - MIA

MDTMIA

Harrisburg

Sat 3/28

8:00 am-4:25 pm

1 stop8h 25m

Miami

Sat 4/4

7:50 pm-10:52 pm

Nonstop3h 02m

$426

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/10

Showing 1-10 of 20 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 January 9, 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 $93). 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 January 12, 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 January 12, 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
8,033 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

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
8,033 reviews
Delta
7.9
Good
8,033 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

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
9,143 reviews
Delta
7.9
Good
8,033 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

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
11,109 reviews
Delta
7.9
Good
8,033 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

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 8h 18m. The time it takes to get you to your destination can typically vary by up to 17m. 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 $419, our data indicates the cheapest price to be $289. The most popular route (Harrisburg - Miami), is priced around $279.

  • 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 $93). 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 Harrisburg to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
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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 January 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$100Average$145FlexibilityNo cancel feeOn-time88%
DeltaCheapest$244Average$362FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$482FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$258Average$422FlexibilityNo cancel feeOn-time71%

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