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$61+ 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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — JAX
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
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 November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$110
(Priceline)

One-way from

$61
(Frontier)

Popular in

September

Cheapest in

March

Average price

$505
Provider with most accurate pricing for Miami-Jacksonville flight deals.
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Provider most trusted by Cheapflights users for Miami-Jacksonville flights.
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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. 17% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 3, 2025.

This Priceline deal was found by Cheapflights users on 11/2. 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 12/46:00 amMIA - JAX
1 stop8h 36mFrontier
Mon 12/83:41 pmJAX - MIA
1 stop7h 37mFrontier
Deal found 11/2$110
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 12/55:30 amMIA - JAX
1 stop12h 10mFrontier
Mon 12/86:36 pmJAX - MIA
1 stop6h 10mFrontier
Deal found 11/2$160
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/43:36 pmMIA - JAX
1 stop19h 00mFrontier
Sun 12/710:00 pmJAX - MIA
1 stop16h 07mFrontier
Deal found 11/1$178
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/239:05 pmMIA - JAX
1 stop19h 29mFrontier
Wed 12/315:29 pmJAX - MIA
1 stop7h 18mFrontier
Deal found 11/1$188
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/35:13 pmMIA - JAX
1 stop19h 18mMultiple Airlines
Sun 12/710:00 pmJAX - MIA
1 stop16h 07mMultiple Airlines
Deal found 11/1$190

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 November 3, 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

Mon 12/8

5:30 am-5:36 pm

1 stop12h 06m

Jacksonville

Sun 12/14

10:00 pm-8:53 pm

1 stop22h 53m

$186

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 11/15

6:35 pm-4:23 pm

1 stop21h 48m

Jacksonville

Mon 11/17

7:56 pm-2:20 pm

1 stop18h 24m

$200

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 12/3

6:00 am-2:36 pm

2 stops32h 36m

Jacksonville

Sun 12/7

10:00 pm-2:07 pm

1 stop16h 07m

$211

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 12/6

8:20 am-10:40 pm

1 stop14h 20m

Jacksonville

Tue 12/9

6:00 am-10:52 pm

1 stop16h 52m

$253

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 11/28

12:28 pm-10:04 am

1 stop21h 36m

Jacksonville

Mon 12/1

10:59 am-11:40 pm

1 stop12h 41m

$255

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 12/6

8:20 am-10:40 pm

1 stop14h 20m

Jacksonville

Mon 12/8

7:35 am-6:54 pm

1 stop11h 19m

$308

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 12/2

1:30 pm-8:15 pm

1 stop6h 45m

Jacksonville

Wed 12/10

1:05 pm-7:50 pm

1 stop6h 45m

$322

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 11/6

10:36 pm-9:15 am

1 stop10h 39m

Jacksonville

Sun 11/9

5:18 pm-10:11 am

1 stop16h 53m

$325

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 12/3

7:20 am-6:04 pm

1 stop10h 44m

Jacksonville

Mon 12/8

7:35 am-6:54 pm

1 stop11h 19m

$328

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 12/3

6:55 am-5:35 pm

2 stops10h 40m

Jacksonville

Sun 12/7

3:00 pm-11:25 pm

2 stops8h 25m

$332

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 22 results
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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 October 31, 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, February is the cheapest month in which you can book a flight from Key Largo to Jacksonville (average of $87). Flying from Key Largo to Jacksonville in September is currently the most expensive (average of $212). 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 November 3, 2025.

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 13% on your trip compared to booking a flight at noon.

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 Wednesday at noon when fares are most often at their lowest. Sunday evenings 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 November 3, 2025.

The most flights from KE9 to JAX are scheduled on a Sunday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 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 November 3, 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
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
8,001 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
11,036 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
2,907 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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 12 inbound flights from Key Largo per day.

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

    For as low as $186, Frontier can have you in Jacksonville from Key Largo in 12h 06m. 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 most reliable airlines from Key Largo to Jacksonville?

    Consider Republic Airways (100%), Envoy Air (87%) or Aer Lingus (75%) 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 $454, our data indicates the cheapest price to be $239. The most popular route (Miami - Jacksonville), is priced around $165.

  • 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 $87). Flying from Key Largo to Jacksonville in September is currently the most expensive (average of $212). 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

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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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$127Average$189FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$140Average$398FlexibilityNo cancel feeOn-time71%
DeltaCheapest$146Average$302FlexibilityNo cancel feeOn-timeN/A

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