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$70+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — JAX
Apr 23 — Apr 301
Thu 4/23
Thu 4/30
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 March 24, 2026.

This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1612:26 pm
MIA
-
JAX
1 stop5h 04m
Frontier
Sun 4/196:25 pm
JAX
-
MIA
1 stop6h 24m
Frontier
Deal found 3/23$140
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.
Sat 4/255:05 am
MIA
-
JAX
1 stop9h 08m
Frontier
Sun 4/266:25 pm
JAX
-
MIA
1 stop6h 24m
Frontier
Deal found 3/23$142
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:10 am
MIA
-
JAX
1 stop7h 23m
Frontier
Fri 4/108:18 pm
JAX
-
MIA
1 stop4h 31m
Frontier
Deal found 3/20$160
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.
Mon 4/69:05 am
MIA
-
JAX
1 stop10h 28m
Frontier
Thu 4/166:25 pm
JAX
-
MIA
1 stop6h 24m
Frontier
Deal found 3/22$175
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.
Fri 4/39:05 am
MIA
-
JAX
1 stop10h 28m
Frontier
Mon 4/68:18 pm
JAX
-
MIA
1 stop4h 31m
Frontier
Deal found 3/19$180
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 4/1711:31 am
MIA
-
JAX
1 stop9h 02m
Frontier
Thu 4/236:25 pm
JAX
-
MIA
1 stop6h 24m
Frontier
Deal found 3/20$181
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1711:31 am
MIA
-
JAX
1 stop9h 02m
Frontier
Fri 4/247:28 pm
JAX
-
MIA
1 stop5h 21m
Frontier
Deal found 3/20$182
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:00 am
MIA
-
JAX
2 stops14h 06m
Multiple Airlines
Mon 4/209:49 pm
JAX
-
MIA
1 stop12h 04m
Multiple Airlines
Deal found 3/22$191
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 4/69:05 am
MIA
-
JAX
1 stop10h 28m
Frontier
Fri 4/108:18 pm
JAX
-
MIA
1 stop4h 31m
Frontier
Deal found 3/22$195
This Expedia deal was found by Cheapflights users on 3/24. 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 4/109:05 am
MIA
-
JAX
1 stop10h 28m
Frontier
Sun 4/125:28 pm
JAX
-
MIA
1 stop7h 21m
Frontier
Deal found 3/24$201
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2411:31 am
MIA
-
JAX
1 stop9h 00m
Multiple Airlines
Sun 4/261:59 pm
JAX
-
MIA
2 stops21h 19m
Multiple Airlines
Deal found 3/22$203

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 March 24, 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

September

Cheapest in

May

Average price

$522
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. 13% potential increase in price ($75 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 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 March 24, 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

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 4/14

6:15 am-3:25 pm

2 stops9h 10m

Jacksonville

Sat 5/2

6:10 am-5:00 pm

1 stop10h 50m

$284

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 5/28

11:40 am-7:35 pm

1 stop7h 55m

Jacksonville

Sat 5/30

12:55 pm-10:05 pm

2 stops9h 10m

$298

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Mon 4/20

6:40 am-1:50 pm

1 stop7h 10m

Jacksonville

Wed 4/22

6:30 am-12:40 pm

1 stop6h 10m

$364

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 4/16

6:20 am-2:45 pm

2 stops8h 25m

Jacksonville

Sat 4/18

12:30 pm-10:05 pm

2 stops9h 35m

$371
Quickest round-trip

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 4/18

11:50 am-5:45 pm

1 stop5h 55m

Jacksonville

Wed 4/22

6:30 am-12:40 pm

1 stop6h 10m

$381

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 4/24

6:20 am-2:45 pm

2 stops8h 25m

Jacksonville

Sun 4/26

6:00 am-4:05 pm

2 stops10h 05m

$383

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 4/25

6:15 am-5:45 pm

2 stops11h 30m

Jacksonville

Sun 4/26

6:00 am-4:05 pm

2 stops10h 05m

$383

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 5/6

6:15 am-3:25 pm

2 stops9h 10m

Jacksonville

Wed 5/13

11:50 am-9:55 pm

2 stops10h 05m

$383

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 4/14

7:20 am-1:40 pm

1 stop6h 20m

Jacksonville

Sat 4/18

12:30 pm-8:20 pm

1 stop7h 50m

$389

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 4/17

6:20 am-4:20 pm

2 stops10h 00m

Jacksonville

Fri 4/24

3:25 pm-10:00 pm

2 stops6h 35m

$391

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

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

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 month to book a flight from Key Largo to Jacksonville?

Currently, February is the cheapest month in which you can book a flight from Key Largo to Jacksonville (average of $124). Flying from Key Largo to Jacksonville in January is currently the most expensive (average of $243). 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 March 24, 2026.

A simple way to save on the total cost of your ticket is to fly from Key Largo to Jacksonville in the evening. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the afternoon.

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 Saturday mornings when fares are most often at their lowest. Thursday mornings 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 March 24, 2026.

The most flights from KE9 to JAX are scheduled on a Tuesday (12 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 on average).

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 March 24, 2026.
Read reviews from past customers who have flown Delta and American Airlines 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
7.9
Good
8,320 reviews

Boarding

8.1

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

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
7.9
Good
8,320 reviews
Delta
7.9
Good
8,320 reviews

Boarding

8.1

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

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
7.1
Good
11,492 reviews
Delta
7.9
Good
8,320 reviews

Boarding

8.1

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

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 8 inbound flights from Key Largo per day.

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

    For as low as $284, Southwest can have you in Jacksonville from Key Largo in 9h 10m. Airlines will cover a distance of 335 mi.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $98. Users have also found prices from $113 and $130 on American Airlines and Delta, respectively.

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

    Consider Envoy Air (84%), American Airlines (75%) or British Airways (74%) 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 $446, our data indicates the cheapest price to be $245. The most popular route (Miami - Jacksonville), is priced around $140.

  • 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, February is the cheapest month in which you can book a flight from Key Largo to Jacksonville (average of $124). Flying from Key Largo to Jacksonville in January is currently the most expensive (average of $243). 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
Fernandina Beach
Kingsland
Waycross
Yulee

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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 March 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$113Average$289FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$140Average$407FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$147Average$232FlexibilityNo cancel feeOn-time62%

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