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$73+ 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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — JAX
Jul 20 — Jul 271
Mon 7/20
Mon 7/27
1 adult, Economy
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Cheap 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 June 20, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/118:30 am
MIA
-
JAX
1 stop9h 04m
Frontier
Sun 7/126:29 pm
JAX
-
MIA
1 stop19h 24m
Frontier
Deal found 6/19$145
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/710:50 am
MIA
-
JAX
1 stop6h 44m
Frontier
Sun 8/96:29 pm
JAX
-
MIA
1 stop19h 24m
Frontier
Deal found 6/19$146
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/38:30 am
MIA
-
JAX
1 stop9h 04m
Frontier
Mon 8/106:29 pm
JAX
-
MIA
1 stop19h 24m
Frontier
Deal found 6/19$147
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/113:07 pm
MIA
-
JAX
1 stop26h 27m
Frontier
Thu 7/166:29 pm
JAX
-
MIA
1 stop22h 04m
Frontier
Deal found 6/19$148
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Tue 7/148:30 am
MIA
-
JAX
1 stop9h 04m
Frontier
Tue 7/216:29 pm
JAX
-
MIA
1 stop19h 24m
Frontier
Deal found 6/17$155
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Tue 7/148:30 am
MIA
-
JAX
1 stop9h 04m
Frontier
Tue 7/286:29 pm
JAX
-
MIA
1 stop19h 24m
Frontier
Deal found 6/17$156
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Tue 7/148:30 am
MIA
-
JAX
1 stop9h 04m
Frontier
Fri 7/176:29 pm
JAX
-
MIA
1 stop19h 24m
Frontier
Deal found 6/17$157
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Wed 7/1511:19 am
MIA
-
JAX
1 stop6h 15m
Frontier
Wed 7/226:29 pm
JAX
-
MIA
1 stop28h 36m
Frontier
Deal found 6/17$158
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/811:19 am
MIA
-
JAX
1 stop6h 15m
Frontier
Wed 7/156:29 pm
JAX
-
MIA
1 stop28h 36m
Frontier
Deal found 6/16$159
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 8/108:30 am
MIA
-
JAX
1 stop9h 04m
Frontier
Wed 8/126:29 pm
JAX
-
MIA
1 stop23h 18m
Frontier
Deal found 6/17$160
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/278:10 am
MIA
-
JAX
1 stop9h 27m
Frontier
Sun 8/306:28 pm
JAX
-
MIA
1 stop19h 01m
Frontier
Deal found 6/16$180

Find 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 June 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$145
(Kiwi.com)

One-way from

$73
(Trip.com)

Popular in

April

Cheapest in

July

Average price

$533
Provider with most accurate pricing for Miami-Jacksonville flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Jacksonville flights.
Search Deals
From Key Largo to Jacksonville
Search Deals
One-way flight from Key Largo to Jacksonville
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 June 20, 2026.
Use the filters below to find and compare flights from Key Largo to Jacksonville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 7/3

6:05 pm-11:00 pm

1 stop4h 55m

Jacksonville

Mon 7/6

5:38 pm-12:51 am

1 stop7h 13m

$272

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 7/14

11:45 am-9:45 pm

2 stops10h 00m

Jacksonville

Wed 7/29

6:45 am-3:45 pm

2 stops9h 00m

$301

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 7/14

11:45 am-9:45 pm

2 stops10h 00m

Jacksonville

Tue 7/21

6:45 am-3:45 pm

2 stops9h 00m

$301

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 8/12

7:30 am-2:55 pm

1 stop7h 25m

Jacksonville

Thu 8/13

1:00 pm-10:05 pm

2 stops9h 05m

$308

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 8/13

7:00 am-3:55 pm

2 stops8h 55m

Jacksonville

Wed 8/19

6:15 am-3:30 pm

2 stops9h 15m

$313

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 8/22

7:00 am-5:55 pm

2 stops10h 55m

Jacksonville

Wed 8/26

6:15 am-3:30 pm

2 stops9h 15m

$313

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 7/14

6:00 am-12:35 pm

2 stops6h 35m

Jacksonville

Sun 7/19

2:45 pm-12:40 am

2 stops9h 55m

$342

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 8/12

7:10 am-4:45 pm

2 stops9h 35m

Jacksonville

Sun 8/23

3:00 pm-10:50 pm

2 stops7h 50m

$342

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 7/21

6:00 am-12:35 pm

2 stops6h 35m

Jacksonville

Tue 7/21

1:55 pm-10:15 pm

2 stops8h 20m

$342
Cheapest one-way
Quickest one-way

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Mon 7/6

8:02 am-9:27 am

Nonstop1h 25m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/15

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

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 June 20, 2026.

A simple way to save on the total cost of your ticket is to fly from Key Largo to Jacksonville in the afternoon. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight in the evening.

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 June 20, 2026.

The most flights from KE9 to JAX are scheduled on a Wednesday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 on average).

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

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 October 19, 2025.

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

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 June 20, 2026.
Read reviews from past customers who have flown American Airlines and Frontier 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.
American Airlines
7.1
Good
11,716 reviews

Comfort

7.2

Food

6.4

Entertainment

6.8

Boarding

7.5

Crew

7.9

Overall

7.1

Reviews

1 / 20
4.0
Okay

Elizabeth,Mar 2026

ORD - MIA

Staff was rude and flight attendants 2 out of 3 looked like they had just been thru a hurricane.
American Airlines
7.1
Good
11,716 reviews
American Airlines
7.1
Good
11,716 reviews

Comfort

7.2

Food

6.4

Entertainment

6.8

Boarding

7.5

Crew

7.9

Overall

7.1

Reviews

1 / 20
4.0
Okay

Elizabeth,Mar 2026

ORD - MIA

Staff was rude and flight attendants 2 out of 3 looked like they had just been thru a hurricane.
Frontier
5.6
Fair
2,877 reviews
American Airlines
7.1
Good
11,716 reviews

Comfort

7.2

Food

6.4

Entertainment

6.8

Boarding

7.5

Crew

7.9

Overall

7.1

Reviews

1 / 20
4.0
Okay

Elizabeth,Mar 2026

ORD - MIA

Staff was rude and flight attendants 2 out of 3 looked like they had just been thru a hurricane.

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. 4 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 12 inbound flights from Key Largo per day.

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

    For as low as $272, Delta can have you in Jacksonville from Key Largo in 4h 55m. Airlines will cover a distance of 335 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $68. Users have also found prices from $98 and $261 on Southwest and American Airlines, respectively.

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

    Consider Envoy Air (83%), American Airlines (73%) or British Airways (65%) 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 $495, our data indicates the cheapest price to be $275. The most popular route (Miami - Jacksonville), is priced around $160.

  • 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.

See more FAQs

Traveling to a place near Jacksonville?

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

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Top 4 airlines flying from Key Largo to Jacksonville

Discover the top 4 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 June 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$77Average$207FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$147Average$212FlexibilityNo cancel feeOn-time62%
DeltaCheapest$153Average$316FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$159Average$442FlexibilityNo cancel feeOn-time71%

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