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Key Largo

$70+ Cheap flights from Jacksonville (JAX) 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
JAX — MIA
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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Cheapflights Tip: The best prices from Jacksonville to Key Largo are usually found in August or April, booked 59 days in advance, depart on a Friday or Monday and return on a Friday

Cheap flight deals from Jacksonville to Key Largo

Cheapest flights from Jacksonville to Key Largo
Explore the most affordable flight options available from Jacksonville to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 23, 2026.

This Priceline deal was found by Cheapflights users on 3/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:49 pm
JAX
-
MIA
1 stop6h 00m
Frontier
Mon 5/118:10 am
MIA
-
JAX
1 stop9h 25m
Frontier
Deal found 3/20$140
This Expedia deal was found by Cheapflights users on 3/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:30 pm
JAX
-
MIA
1 stop5h 19m
Frontier
Mon 4/203:24 pm
MIA
-
JAX
1 stop20h 14m
Frontier
Deal found 3/22$160
This Expedia deal was found by Cheapflights users on 3/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:28 pm
JAX
-
MIA
1 stop5h 21m
Frontier
Mon 5/43:24 pm
MIA
-
JAX
1 stop19h 09m
Frontier
Deal found 3/23$166
This Frontier deal was found by Cheapflights users on 3/19. 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.
Thu 4/25:28 pm
JAX
-
MIA
1 stop7h 21m
Frontier
Wed 5/208:10 am
MIA
-
JAX
1 stop9h 25m
Frontier
Deal found 3/19$175
This Priceline deal was found by Cheapflights users on 3/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:30 pm
JAX
-
MIA
1 stop5h 19m
Frontier
Fri 4/2412:26 pm
MIA
-
JAX
1 stop6h 07m
Frontier
Deal found 3/20$180
This Frontier deal was found by Cheapflights users on 3/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/138:18 pm
JAX
-
MIA
1 stop4h 31m
Frontier
Mon 4/2012:59 pm
MIA
-
JAX
1 stop7h 55m
Frontier
Deal found 3/23$181
This Kiwi.com deal was found by Cheapflights users on 3/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:26 pm
JAX
-
MIA
1 stop10h 05m
Multiple Airlines
Fri 4/176:00 am
MIA
-
JAX
2 stops14h 06m
Multiple Airlines
Deal found 3/21$186
This Kiwi.com deal was found by Cheapflights users on 3/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/209:49 pm
JAX
-
MIA
1 stop12h 04m
Multiple Airlines
Mon 4/278:12 am
MIA
-
JAX
1 stop12h 42m
Multiple Airlines
Deal found 3/23$195
This Frontier deal was found by Cheapflights users on 3/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/68:18 pm
JAX
-
MIA
1 stop4h 31m
Frontier
Thu 4/99:10 am
MIA
-
JAX
1 stop7h 23m
Frontier
Deal found 3/22$201
This Expedia deal was found by Cheapflights users on 3/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/266:25 pm
JAX
-
MIA
1 stop6h 24m
Frontier
Mon 4/273:24 pm
MIA
-
JAX
1 stop20h 14m
Frontier
Deal found 3/23$205
This Expedia deal was found by Cheapflights users on 3/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/278:21 pm
JAX
-
MIA
1 stop4h 26m
Frontier
Fri 4/109:05 am
MIA
-
JAX
1 stop10h 28m
Frontier
Deal found 3/22$215

Find flight deals from Jacksonville to Key Largo

Keep the following information in mind while searching for Jacksonville to Key Largo flight deals. Data was last updated March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$140
(Priceline)

One-way from

$70
(Frontier)

Popular in

October

Cheapest in

August

Average price

$480
Provider with most accurate pricing for Jacksonville-Miami flight deals.
Search Deals
Provider most trusted by Cheapflights users for Jacksonville-Miami flights.
Search Deals
From Jacksonville to Key Largo
Search Deals
One-way flight from Jacksonville to Key Largo
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($55 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 March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Jacksonville 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 March 23, 2026.
Use the filters below to find and compare flights from Jacksonville to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Tue 4/21

6:30 am-12:40 pm

1 stop6h 10m

Miami

Tue 4/28

12:35 pm-8:45 pm

1 stop8h 10m

$244

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Wed 4/15

6:05 am-5:30 pm

2 stops11h 25m

Miami

Wed 4/22

12:35 pm-9:30 pm

2 stops8h 55m

$317

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Thu 5/7

10:55 am-10:00 pm

2 stops11h 05m

Miami

Thu 5/14

6:20 am-4:20 pm

2 stops10h 00m

$343

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Sat 4/25

12:55 pm-11:15 pm

1 stop10h 20m

Miami

Mon 4/27

6:20 am-4:55 pm

2 stops10h 35m

$344

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Wed 4/8

1:15 pm-9:55 pm

2 stops8h 40m

Miami

Sat 4/11

6:35 am-2:10 pm

1 stop7h 35m

$353

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Mon 4/13

5:35 am-4:50 pm

2 stops11h 15m

Miami

Thu 4/16

6:20 am-2:45 pm

2 stops8h 25m

$371

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Mon 7/27

6:55 am-2:10 pm

1 stop7h 15m

Miami

Tue 8/4

11:50 am-7:45 pm

1 stop7h 55m

$373

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Sat 8/15

6:15 am-4:15 pm

2 stops10h 00m

Miami

Sun 8/23

5:50 am-1:05 pm

1 stop7h 15m

$378

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Thu 7/23

6:55 am-2:10 pm

1 stop7h 15m

Miami

Sun 7/26

6:20 am-2:10 pm

1 stop7h 50m

$381

JacksonvilleMiami

JAX - MIA

JAXMIA

Jacksonville

Mon 7/6

7:45 am-4:25 pm

2 stops8h 40m

Miami

Thu 7/9

5:40 am-4:15 pm

2 stops10h 35m

$383

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

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

Best time to book a flight from Jacksonville to Key Largo

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

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

Use this chart to determine the optimal time to book a round-trip flight from Jacksonville to Key Largo. Price data was last updated on March 13, 2026.

To ensure you get the cheapest price possible for a flight from Jacksonville to Key Largo, you should look to book at least 59 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, July is the cheapest month in which you can book a flight from Jacksonville to Key Largo (average of $132). Flying from Jacksonville to Key Largo in November is currently the most expensive (average of $286). 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 JAX to KE9?

Find hourly flight availability from Jacksonville 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 March 23, 2026.

One of the essential ways to save on airfare from Jacksonville to Key Largo is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 44% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Jacksonville to Key Largo. Price data was last updated on March 14, 2026.

Travelers seeking maximum savings on their Jacksonville to Key Largo flight should consider departing on Monday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Jacksonville to Key Largo

Explore weekly flight availability from Jacksonville 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 March 23, 2026.

The most flights from JAX to KE9 are scheduled on a Saturday (13 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 on average).

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 March 23, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andJetBlue from Jacksonville to Key Largo by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

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
8.0
Very good
4,324 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

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
8,318 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

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
7.2
Good
2,908 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

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
11,486 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

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
5.7
Fair
3,020 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

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 Jacksonville 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 Jacksonville to Key Largo?

    If you book a flight to Key Largo from Jacksonville, you will be flying from Jacksonville, which is the city’s only airport. Jacksonville (JAX) is located 11.2 mi from the center of Jacksonville. There are 10 flights from Jacksonville to Key Largo per day from 5 different airlines.

  • How popular is this Jacksonville to Key Largo flight route?

    Within the past month, 59 users have taken a look at flights from Jacksonville to Key Largo.

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

    There are many flights that can get you from Jacksonville to Key Largo in 6h 10m. Fly via Southwest to get the fastest option. Airlines will cover a distance of 335 mi.

  • What are the cheapest airlines to fly from Jacksonville to Key Largo one-way?

    $61 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on JetBlue and Delta, with prices starting from $83 and $99, respectively.

  • What are the most reliable airlines from Jacksonville to Key Largo?

    Before booking your flight to Key Largo from Jacksonville, check out the most reliable airlines to get you to your destination on time: British Airways (84%), Qatar Airways (80%), Envoy Air( 80%).

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

    On average you can expect to pay $1,071 for a flight from Jacksonville to Key Largo. The cheapest flight overall is $150 while the most popular route, (Jacksonville - Miami) is currently priced at $201.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from Jacksonville to Key Largo (average of $132). Flying from Jacksonville to Key Largo in November is currently the most expensive (average of $286). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Jacksonville to Key Largo

Discover the top 5 airlines that operate flights from Jacksonville 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 March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$137Average$314FlexibilityNo cancel feeOn-time62%
DeltaCheapest$158Average$469FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$160Average$187FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$162Average$282FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$198Average$405FlexibilityNo cancel feeOn-time71%

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