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$77+ Cheap flights from Key Largo, FL to Jacksonville (JAX)

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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — JAX
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Jacksonville are usually found in March or May, booked 61 days in advance, depart on a Friday or Saturday and return on a Sunday

Cheap flight deals from Key Largo to Jacksonville

Keep the following information in mind while searching for Key Largo to Jacksonville flight deals. Data was last updated September 16, 2025.

Round-trip from

$151
(Priceline)

One-way from

$77
(Priceline)

Popular in

September

Cheapest in

March

Average price

$533
From Key Largo to Jacksonville
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One-way flight from Key Largo to Jacksonville
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Highest demand for flights based on searches. 12% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Key Largo to Jacksonville

Cheapest flights from Key Largo to Jacksonville
Explore the most affordable flight options available from Key Largo to Jacksonville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Priceline deal was found by Cheapflights users on 9/14. 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.
Thu 10/91:00 pmMIA - JAX
1 stop7h 47mFrontier
Sun 10/126:05 pmJAX - MIA
1 stop6h 29mFrontier
Deal found 9/14$151
This Frontier deal was found by Cheapflights users on 9/14. 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.
Sun 10/55:30 amMIA - JAX
1 stop6h 13mFrontier
Sun 10/126:05 pmJAX - MIA
1 stop6h 29mFrontier
Deal found 9/14$154
This Frontier deal was found by Cheapflights users on 9/15. 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 10/165:15 amMIA - JAX
1 stop11h 53mFrontier
Sun 10/199:59 pmJAX - MIA
1 stop24h 26mFrontier
Deal found 9/15$158
This Priceline deal was found by Cheapflights users on 9/15. 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 10/319:30 amMIA - JAX
1 stop8h 39mFrontier
Sun 11/25:08 pmJAX - MIA
1 stop7h 26mFrontier
Deal found 9/15$159
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Thu 10/2312:30 pmMIA - JAX
1 stop4h 38mMultiple Airlines
Sun 10/266:05 pmJAX - MIA
1 stop6h 29mMultiple Airlines
Deal found 9/13$164
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:32 pmMIA - JAX
1 stop25h 32mFrontier
Sun 11/25:08 pmJAX - MIA
1 stop7h 26mFrontier
Deal found 9/16$177
This Frontier deal was found by Cheapflights users on 9/13. 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 10/231:00 pmMIA - JAX
1 stop7h 47mFrontier
Mon 10/2711:37 amJAX - MIA
1 stop13h 13mFrontier
Deal found 9/13$189
This Frontier deal was found by Cheapflights users on 9/15. 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.
Fri 10/319:30 amMIA - JAX
1 stop8h 39mFrontier
Fri 11/710:10 amJAX - MIA
1 stop9h 44mFrontier
Deal found 9/15$191
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Sun 10/125:15 amMIA - JAX
1 stop11h 55mFrontier
Sun 10/196:05 pmJAX - MIA
1 stop6h 29mFrontier
Deal found 9/14$212

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Jacksonville 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 September 16, 2025.
Use the filters below to find and compare flights from Key Largo to Jacksonville that are best for you.

Fly from

Key Largo

Fly to

Jacksonville

Route

Depart

Return

Price

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 10/25

7:32 pm-9:04 pm

1 stop25h 32m

Jacksonville

Sun 11/2

5:08 pm-12:34 am

1 stop7h 26m

$177

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 10/31

9:30 am-6:09 pm

1 stop8h 39m

Jacksonville

Fri 11/7

10:10 am-5:41 pm

1 stop7h 31m

$189

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 10/17

4:16 pm-10:51 am

2 stops18h 35m

Jacksonville

Sun 10/19

9:59 pm-4:03 pm

2 stops18h 04m

$219

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Mon 10/20

5:15 am-8:47 pm

2 stops15h 32m

Jacksonville

Thu 10/23

6:03 pm-12:34 am

1 stop6h 31m

$220

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 10/24

4:16 pm-10:51 am

2 stops18h 35m

Jacksonville

Sun 10/26

9:59 pm-8:26 am

1 stop10h 27m

$243

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 10/21

11:45 am-5:35 pm

1 stop5h 50m

Jacksonville

Wed 10/29

12:55 pm-9:55 pm

2 stops9h 00m

$262

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Mon 10/20

7:20 am-8:47 pm

2 stops13h 27m

Jacksonville

Fri 10/24

11:37 am-12:50 pm

1 stop25h 13m

$264

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 2/10

6:55 am-5:00 pm

2 stops10h 05m

Jacksonville

Sat 2/28

4:00 pm-10:30 pm

1 stop6h 30m

$276

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sun 11/16

5:01 am-4:23 pm

1 stop11h 22m

$83

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 11/15

6:00 am-9:53 pm

1 stop15h 53m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 18 results
1
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Best time to book a flight from Key Largo to Jacksonville

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

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Jacksonville. Price data was last updated on September 12, 2025.

The best time to book flights from Key Largo to Jacksonville is 61 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Key Largo to Jacksonville (average of $278). Flying from Key Largo to Jacksonville in March is currently the most expensive (average of $365). 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 KE9 to JAX?

Find hourly flight availability from Key Largo to Jacksonville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

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

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

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

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

Weekly flight availability from Key Largo to Jacksonville

Explore weekly flight availability from Key Largo to Jacksonville. 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 September 16, 2025.

The most flights from KE9 to JAX are scheduled on a Tuesday (13 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (5 on average).

How much does it cost to fly round-trip from Key Largo to Jacksonville?

Reviews of airlines servicing Jacksonville

Get insights into the airlines that provide service to Jacksonville. 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 Jacksonville. Reviews last updated September 16, 2025.
Read reviews from past customers who have flown Delta, American Airlines, and JetBlue from Key Largo to Jacksonville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,957 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
JetBlue
7.2
Good
2,914 reviews
Delta
8.0
Very good
7,957 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Jacksonville. 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 into for flights to Jacksonville from Key Largo?

    Jacksonville (JAX), located 11.2 mi from the city center, is the airport you fly into when you book flights from Key Largo to Jacksonville. 3 airlines have flights to Jacksonville from Key Largo on a regular basis. Booking flights from Key Largo to Jacksonville should not be difficult; the airport handles an average of 9 inbound flights from Key Largo per day.

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

    For as low as $177, Frontier can have you in Jacksonville from Key Largo in 25h 32m. Airlines will cover a distance of 335 mi.

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

    Consider Republic Airways (75%), Envoy Air (73%) or American Airlines (71%) when booking your flight. These represent the most reliable airlines when flying from Key Largo to Jacksonville.

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

    Looking for the cheapest flight from Key Largo to Jacksonville? While on average our users pay $520, our data indicates the cheapest price to be $225. The most popular route (Miami - Jacksonville), is priced around $204.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Key Largo to Jacksonville (average of $278). Flying from Key Largo to Jacksonville in March is currently the most expensive (average of $365). 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

Traveling to a place near Jacksonville?

Book flights to Jacksonville if you plan to visit one of these locations
Jacksonville Beach
Orange Park
Kingsland
Fernandina Beach
Waycross

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Top 3 airlines flying from Key Largo to Jacksonville

Discover the top 3 airlines that operate flights from Key Largo to Jacksonville. 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$76Average$186FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$140Average$394FlexibilityNo cancel feeOn-time71%
DeltaCheapest$146Average$295FlexibilityNo cancel feeOn-timeN/A

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